Articles & Newsletter


ItemTopicPublish Date

Get New Articles to Your Inbox

Designing a Power over Ethernet (PoE) Solution

In this article, we discussed the general requirements of PoE and the design of the DC/DC transformation of the PD. MPS offers PoE power solutions for all the current protocol levels (af, at, and bt) featuring simplified BOM, efficient EMC characteristics, and other design advantages.

October 2021

EMI Generation, Propagation, and Suppression in Automotive Electronics (Part II)

This article is the second part of a two-part series delving into strategies for modeling and analyzing EMI problems. Part 1 explored approaches to reducing conducted EMI between differential mode (DM) noise and common mode (CM) noise. Part II will cover radiated EMI modeling strategies based on Thevenin’s Theorem, as well as ground impedance reduction techniques.

October 2021

EMI Generation, Propagation, and Suppression in Automotive Electronics (Part I)

To reduce EMI, it is necessary to model and analyze various EMI problems. This article provides modeling and suppression methods to reduce EMI in non-isolated converters, such as buck, boost, and buck-boost converters.

October 2021

MPS Solutions for Intelligent Driving

In this article, we discussed how the MPQ8875A and MPQ4425B help DMS and CMS cameras achieve stable, reliable power supplies while improving their infrared LED-based tracking capabilities. As the demands of intelligent driving become more complex, MPS’s power management tools will continue to help designers implement cutting-edge features that emphasize safety, convenience, and efficiency.

September 2021

MPS's Isolated Power Solutions Promote Carbon Neutrality

MPS continues to launch more environmentally conscious, isolated IC products for medium- and high-power power applications. As a result, power designers are able to evolve small-size, high-performance, and fast response power supplies with a lower cost, reduced carbon footprint, and shorter development cycles.

September 2021

Designing an Active-Clamp Forward Converter for PoE-bt Applications (Part II)

In this article, we reviewed how MOSFET transistors and RCD absorption circuits can improve efficiency for active-clamp forward converters, then verified these theories. Overall, PoE solutions using active-clamp forward converters provide higher efficiency and overcome the shortcomings of RCD clamp circuits, further enhancing the function of PoE-bt applications.

September 2021

Designing an Active-Clamp Forward Converter for PoE-bt Applications (Part I)

In this article, we reviewed the evolution and main components of PoE solutions, topological comparisons between flyback and forward converters, and common clamp circuits, including active clamps. Part II will go further in depth and discuss secondary-side synchronous rectification MOSFETs, secondary spike absorption circuits, and efficiency verification processes for PoE-bt applications.

September 2021

MPS's Fully Integrated Power Modules Boost Cloud Computing

MPS power modules present unique advantages that help designers develop highly integrated, scalable, and efficient solutions. As a world-leading semiconductor supplier, MPS fulfills the specific requirements of cloud computing hardware acceleration to create power module solutions capable of handling all voltage and current ranges in power supply systems.

August 2021

MPS’s Open-Source Emergency Ventilator with eMotionTM and Battery Backup

The increasing demand in ventilators meant they would soon be out of supply, so a team at Monolithic Power Systems (MPS) sought to help create a solution to this crisis. While MPS is not a medical device manufacturer, its engineers and designers are highly experienced with power electronics and motor control. Given the technical architecture of ventilators, respirators and ventilator-type machines, MPS leveraged their expertise to aid the fight against the global pandemic.

July 2021

Evaluating the Transient Performance of Buck Regulators with an Integrated Compensation Network

This article presented a systematic approach to evaluate the capability of the internal compensation networks based on the application switching frequency. The proposed evaluation technique involved three basic checks to ensure that the internal compensation network is properly designed for an application with a known or configurable switching frequency. In certain cases, adding external knobs can further improve the system’s transient performance. These principles were applied to the MPQ4430, which verified the effectiveness of the technique. 

July 2021

A Novel Fuel Gauge Solution for High-Voltage Battery Packs

Fuel gauges, such as the MPF42790 from MPS, must provide optimal performance in addition to adaptable designs, simple GUIs, and virtual testing capabilities. These highly adaptable devices enable designers to resimulate previously recorded tests, which significantly speeds up configuration, testing, and validation.

July 2021

Using Current Regulation in DC Motor Drivers

This article provides exploration of how to use the current regulation feature available with motor drivers, such as MPS’s MP6522, to regulate and control the large currents that flow when starting a DC motor. By understanding how to properly limit a motor’s start-up current, designers are able to not only use smaller motor drivers, but also optimize their system’s current delivery.

July 2021

How to Design a Flyback Converter in Seven Steps

This article used the MP6004 from MPS to demonstrate how to design a flyback converter in eight simple steps. Though there are many more things to consider before a design is ready for implementation — such as passing EMC tests, control loop design, and component selection — it is important to establish a clear method for calculating and selecting components.

June 2021

Using Thermal Derating to Extend Automotive LED Life Expectancy: A Simple and Cost-Effective Solution

This solution offers automotive lighting system manufacturers a stable, cost-effective option that can significantly add to the life expectancy of the components in the circuit while taking up very little board space. The circuit proposed in this article can be applied to many existing lighting systems with relative ease and an inexpensive bill of materials, while demonstrating the reliability and flexibility of driver ICs. 

June 2021

Digital PFC + LLC Combo Controller Helps Fast-Charge Adapters Enter the New Age

Fast-charge technology has developed rapidly in the last few years due to the exponential increase in power demand for mobile devices. In late 2020, cell phone market leaders (such as Apple, Xiaomi, and Samsung) started to abandon in-box adapters for cell phones. This change stimulated another boom for the demand of aftermarket adapters, and also confirmed two trends for the fast-charging adapter market.

June, 2021

Automotive Electronics Reliability Testing Starts and Ends with the Mission Profile

Automakers must design vehicles to thrive in a broad spectrum of environments, from snowy tundras to scorching deserts. Unlike most consumer applications, where the expected lifespan can be months, automotive electronics are often expected to last 15 years or more. When specifying a vehicle component, it is common for OEMs and their suppliers to develop an automotive mission profile, which is essentially a summary of all the expected environmental and functional conditions that the component will face during its service life.

May 2021

Direct Junction Temperature Measurement of a DC Switching Power Supply

This article will help readers understand a practical method to measure the junction temperature of an IC by demonstrating how to implement a direct readout temperature measuring method using the MOSFET body diode of a power good (PG) pin. This is a direct voltage readout method using the diode voltage vs. temperature relationship.

May 2021

PMSM Parameter Identification in Smart Motors

This article presents solutions for RLS-based motor parameter identification for PMSMs using a smart motor control module. The performance is validated in hardware real-time tests using MPS’s MMP757188-36. An example of position controls with different inertia values was presented to illustrate the significance of parameter identification. 

May 2021

Powering the Next Sophisticated AI System

Today’s AI systems are enabled through several high-performance computer systems that are challenging power designers on many fronts. The traditional datacenter designs are rapidly migrating from general purpose CPU-only solutions towards combinations of CPUs, GPUs, and TPUs, which bring new and more stringent demands on power design solutions.

April 2021

Highly Integrated, Scalable, Current-Sharing Hot-Swap Solution for 48V Datacenter Applications

Incorporating these elements into an integrated hot-swap solution such as the MP5048 provides a simple, user-friendly and robust solution that is greatly suitable for space-constrained 48V datacenter applications. A monolithic system makes it possible to adapt the operation of the system to the needs at hand, eliminates repetitive and labor-intensive activities, and allows engineers to address shrinking space constraints and tight project turnaround times.

April 2021

How does Flyback Synchronous Rectification Affect EMI?

Flyback adapter design with SR is different from conventional set-ups with a Schottky diode. When adopting an synchronous rectification solution, the two main expectations are improved efficiency and thermal performance. However, there are other aspects to consider, such as EMI performance.

April 2021

The Difference between CCM and DCM Explained

Flyback converters are often used in switch-mode power supplies for AC/DC and DC/DC conversion, especially for the low-to-mid power range (about 2W to 100W). In this power range, flyback converters offer a very competitive size, cost, and efficiency ratio.

April 2021

Primary-Side vs. Secondary-Side Regulation

There are two differentiated methods for implementing a control loop in your converter design: called primary-side regulation and secondary-side regulation (PSR and SSR, respectively). Each method has its own set of advantages and disadvantages, which have been discussed in this article

April 2021

Simplified USB Type-C Power Management Design for Portable Devices

USB Type-C cables and connectors are small, but they are incredibly versatile and powerful, with a wide voltage range between two power sources (VCONN and VBUS). In order to have an elegant, compact design that can reliably handle and monitor USB Type-C voltages, an integrated power device with an O-ring circuit and a buck-boost circuit is strongly recommended.

March 2021

Switch Node Layout Considerations for EMC

For any switching regulator or power converter circuit, the layout of the SW node requires serious consideration. It is important to understand SW node waveforms, determine a reasonable SW trace size, and utilize strategies to minimize near-field coupling.

March 2021

A Perfect Match: Power Losses in Buck Converters and How to Increase Efficiency

Today's highly developed power ICs require superior power inductors. Building a standard power supply with common footprints can help reduce design time and production costs. Determining the best match between an inductor and an IC is paramount to achieving the best performance in terms of PCB space, as well as thermal and cost efficiency. 

February 2021

Brushless Vs Brushed DC Motors: When and Why to Choose One Over the Other

There are two types of commonly used DC motors: Brushed motors, and brushless motors (or BLDC motors). As their names imply, DC brushed motors have brushes, which are used to commutate the motor to cause it to spin. Brushless motors replace the mechanical commutation function with electronic control.

February 2021

Improving Efficiency with an Active Switch on an AC Bridge

n active bridge solution based on a powerful synchronous rectifier provides an instant alternative to solve issues with high power loss on the diode bridge in conventional PFCs. By replacing the bridge diodes — which have a relatively fixed forward voltage drop — with MOSFETs, conduction loss can be reduced with a lower MOSFET on state resistance. 

February 2021

USB Type-C Boost and Buck-Boost Solutions for PPS

USB single- and multi-port power products are now available with extended functionality for better control across many applications, including direct battery charging with PPS functions. Devices and solutions were presented for powering USB Type-C ports that require USB-PD and PPS functionality, which is becoming increasingly common in the latest consumer and automotive products for a variety of applications. High efficiency, full protection features, and versatile programmable functions in these types of solutions yield high-performance, cost-effective power delivery.

February 2021

Understanding Datasheet Thermal Parameters and IC Junction Temperatures

This introductory article will help today’s hardware engineers understand how to decipher the thermal parameters found in datasheets — including whether to choose theta vs. psi, how to calculate these values, and most importantly, how to apply these values.

February 2021

Quick Tips to Diagnose and Stabilize an Unstable Switching Power Supply

This article explored several quick tips to diagnose and solve instability problems in switching power supplies. Separate techniques were proposed for stabilizing regulators with an external compensation network vs. regulators with an external compensation network. 

February 2021

Using External Knobs to Improve Transient Performance of Buck Regulators with an Integrated Compensation Network

In this article, a systematic approach has been provided to further optimize the transient performance of internally compensated buck regulators, demonstrated with the MPQ4420. 

February 2021

Audible Power Supply Noise

There are several solutions to address audible noise in a power supply. Solutions such as changing the control strategy to avoid certain frequencies or changing the peak current can reduce audible noise.

February 2021

Lithium-Ion Battery Charger IC Based Maximum Power Point Tracking System

The MP2731 lithium-ion battery charger IC effectively reduces the cost for outdoor IoT systems by eliminating discrete voltage and current-sensing circuitry from the BOM. Highly integrated low RDS(ON) allows for a high-efficiency system with a compact PCB area.

February 2021

How to Achieve Fast Charging with USB PD in Portable Devices

Today's consumers want to conveniently and quickly charge their portable devices anywhere, whether they are in a business center or shopping mall, or waiting for a flight or train. However, there are many different types of charging adapters and connectors, which can make determining which charger or chargers to have on hand confusing for the end user. If the consumer has to carry multiple different charging adapters for different portable devices (such as their phone, tablet, and laptop), they can quickly become overwhelmed

January 2021

Power Factor Correction (PFC)

Power factor is defined as the ratio of energy a device is capable of transmitting to the output versus the total amount of energy it takes from the input power source. It is a key figure of merit for the design of electrical devices, especially due to the regulations put in place by countries and international organizations like the EU.

January 2021

DC Power Supply Noise Reduction and Measurement

DC switching power can generate audible noise, which is often heard as a slight whistle. Where does audible noise come from, and how can it be reduced or eliminated? This article will describe simple ways to prevent noise while measuring and designing an application. Read on to find common weak points in existing or planned PCB designs for DC power supply circuits.

November 2020

Surface-Mounted Inductors Optimized for MPS ICs

The new surface-mounted power inductors from Monolithic Power Systems are designed for applications ranging from power supplies to power converters. The molded and semi-shielded series inductors include inductance ranges from 0.33µH to 22µH, and saturation current ranges from 0.8A to 64A.

November 2020

MP3424 Single AA Battery Boost Solution

Having a programmable constant current mode in a boost DC/DC regulator is a great tool to use for applications that have a power-limited source, such as a low-voltage battery. Using the switch pin on the boost converter for a separate power input, while biasing the device with a small auxiliary source, utilizes the full power potential of the battery source.

October 2020

Powering Datacenters with Digital Multi-Phase Controllers

The multi-phase solution has evolved into digital control that enables greater capability in solving the challenges of powering high-current/power applications such as datacenters. With digital control solutions, the design burdens of component selection, loop/performance optimization, and layout are greatly reduced. These control solutions shorten the overall design time, system troubleshooting, and ultimately improve time-to-market.

September 2020

Switching Power Supply: Uses, Advantages and Working Principle

Switching AC/DC power supplies offer increased performance for a fraction of the size, which is what has made them so popular. The downside is that their circuits are significantly more complex, and they require more precise control circuits and noise cancellation filters. Despite the added complexity, MPS provides simple and efficient solutions to make the development of your AC/DC power supply easier.

September 2020

Analog Vs. Digital Signal

This article introduces some of the basic concepts of analog and digital signals, and their uses in electronics. There are clear advantages and disadvantages with each technology, and knowing your application’s needs and performance requirements will help you determine which signal(s) to choose.

September 2020

Live Digital Solutions for Efficient Power Supply Designs (Part II)

MPS’s HR121x family of products are rich in digital and analog functions. These PFC + LLC combo controllers are highly integrated, and offer reduced power consumption that makes them well suited for standby power applications. 

August 2020

Understanding AC/DC Power Supplies

Methods for designing an AC/DC power supply have changed over time. Linear AC/DC power supplies are limited in size and efficiency, because they work at low frequencies and regulate the output temperature by dissipating the excess energy in the form of heat. By contrast, switching power supplies have become extremely popular, because they use switching regulators to convert AC to DC power.

August 2020

The Past and Present of COT Control

MPS’s digital COT control can not only achieve multi-phase, multi-loop control, but also can support phase number configuration, automatic loop compensation, and other benefits that greatly simplify the design and improve product design efficiency. 

August 2020

Operational Amplifier Basics

An operational amplifier (op amp) is an analog circuit block that takes a differential voltage input and produces a single-ended voltage output. Operational amplifiers work to amplify the voltage differential between the inputs, which is useful for a variety of analog functions including signal chain, power, and control applications.

August 2020

Live Digital Solutions for Efficient Power Supply Designs (Part I)

With the continued rapid development of various electronic products, high-efficiency power supply design requirements are continually evolving. The high-efficiency conversion circuits defined in textbooks can no longer meet the actual needs of the market, because achieving high efficiency under rated operating conditions is just one of the requirements. 

August 2020

How to Avoid Inductor Saturation in your Power Supply Design

The saturation behavior of the inductor is often misunderstood and can be troublesome. This article will address how inductors become saturated, how saturation affects the circuit, and methods to detect inductor saturation.

August 2020

Xilinx Reference Design: MPS Launches High-Performance FPGA Power Supply Solutions

As a leader in the FPGA field, Xilinx has launched various platform design solutions for a wide range of applications, especially in the field of wireless communication and artificial intelligence. As the power design requirements of high-performance FPGAs continue to increase in complexity, power supply engineers begin to face more challenges.

August 2020

Voltage Regulator Types and Working Principles

Voltage regulators (VRs) keep the voltages from a power supply within a range that is compatible with the other electrical components. While voltage regulators are most commonly used for DC/DC power conversion, some can perform AC/AC or AC/DC power conversion as well. This article will focus on DC/DC voltage regulators.

July, 2020

How to Select a Lithium-Ion Battery Charge Management IC

As Li-ion batteries continue to be used in modern appliances and systems, it is vital to continuously evaluate how to make them more efficient and cost-effective. With so many architectures and chargers to choose from, MPS can streamline the process with products like the MP2731.

July, 2020

If Small is Too Big: The New MA782 Hall Encoder is the World's Smallest True Absolute IC EncoderTM

The sensing core of the MA782 is based on an array of integrated Hall-effect devices that measure the direction of the in-plane magnetic field. A fast digital filter that generates 8-bit to 12-bit angle resolution and efficient SPI communication emables control cycles as short as 6.25µs for highly dynamic systems. With the SpinAxisTM method, minimal calibration is required, limited to just a zero-point shift and possible symmetry compensation.

June, 2020

Integrated Solution for Multiple Li-Ion/Li-Polymer Batteries

The traditional solution for multi-cell battery chargers is composed of several discrete power MOSFETs and multiple auxiliary components.

June, 2020

Power Modules Make PCIe Accelerator Cards More Powerful

Major internet companies, cloud computing service providers, and communication service providers are demanding further improved server computing performance and data processing speed. The traditional CPU can no longer meet today’s data processing requirements.

June, 2020

MPS Simulation Tools to Speed Up Your Design

An unexpected pandemic has disrupted design timelines across the globe. Because design teams must work from home, manufacturers have experienced numerous product delays or even cancellations. MPS simulation tools can help users speed up their design process

June, 2020

Digital Communications in Power Supply Applications

Adding a digital control and communication feature to the power converter allows better integration of these devices into modern electronic systems by streamlining system design, and increasing flexibility and reliability.

Originally published in EDN

June, 2020

EMC Testing Plan and Key Success Factors 

Electromagnetic compatibility (EMC) can prove difficult for developers and project managers. In-house testing results are rarely as good as expected, and additional obstacles may arise during development.

May, 2020

MPS Electronics:  Stepper Motors: Types, Uses and Working Principle

On this article we will cover the basics of a stepper motor. You will learn about the working principles, control methods, uses, and types of a stepper motor. As well as its advantages and disadvantages.

April, 2020

Article: Achieve Fast Transient Performance with MPS's Latest 12V-to-Load Multi-Phase Solution

MPS offers customers the ability to increase efficiency, achieve very fast transient performance, and save on both cost and space. Because no bulky output capacitors are required, our parts are available in an ultra-small package size to minimize footprint on the PCB.

March, 2020

Article: Accelerate the Future with MPS Power Modules

Power modules are the next step in power management evolution. As design requirements become stricter and available board space continues to shrink, engineers need solutions that can offer excellent performance with the smallest possible footprint.

March, 2020

Article: MP8859: Integrated DC/DC Buck-Boost Converter with I2C Control

The MP8859 is a versatile buck-boost converter suitable for a variety of USB PD or portable battery applications requiring output currents of up to 3A. The I2C configurability allows the MP8859 to be rapidly tailored by speeding up evaluation and reducing design time.

March, 2020

Article: Easy, Cost-Effective Pre-Booster for Automotive Cold Crank Conditions

The power stage for most 12V automotive systems consists of a single buck converter that typically regulates the output voltage to 5V or 3.3V. Even if the regulator starts working in low dropout mode, most circuits can be affected by a dip in the input voltage, and may stop functioning.

March, 2020

Article: Automotive LED Driver Design: Good Practices to Ensure EMC Compliance

More and more automotive manufacturers are adopting LED lighting technology and moving away from halogen light bulbs. LED lighting systems have diverse power supply requirements, depending on the number of devices present on a string, the current needed, dimming, and other factors.

March, 2020

Article: Modern Efficiency is Powered by Digital Flexibility

The PFC stage can benefit significantly from a multi-mode control scheme other than the conventional options of simple critical conduction mode (CrM) or continuous conduction mode (CCM).

Originally published in ElectronicDesign

February, 2020

Article: Using MagAlpha Rotary Magnetic Sensors in Side Shaft Mode

It should be noted that mechanical and magnetization tolerances have a much larger effect on sensor linearity in side shaft modes. As a consequence, these tolerances must be considered to ensure the final design meets expectations. After the initial settings are found using the simulator for a first pass, it is recommended to perform a series of further simulator iterations by adding in the various tolerances via the advance parameters section.

February, 2020

Article: MA800 Family Contactless Angle Sensing Increases Reliability in Rotary Switch Applications

Flexibility of the MA8xx family provides designers with an innovative way to improve reliability in rotary interface applications while simultaneously adding increased functionality to the end user’s experience

February 2020

Article: Choosing the Right Magnet for MagAlpha Sensors

Exact magnet sizes, shapes, and materials should be selected depending on application requirements and target costs. This article discusses tradeoffs and how to choose the best magnet for an application.

February 2020

Article: Using MOSFET Drivers for Motor Drives 

Practical information to select the best components for use in a motor drive with a pre-driver IC and power MOSFETs. Hopefully it will help you in selecting the right IC and associated components in your next motor drive design.

January 2020

Article: 5G Base Station Complexity Drives the Need for Low-EMI DC/DC Module Solutions

5G enables many more data connections per base station by using what are called “massive multiple-input multiple-output” (massive-MIMO) antenna arrays.

January 2020

Article: Introducing the MagAlpha MAQ430 & MAQ470: 12-Bit, Automotive-Grade, Magnetic Angle Sensors

Measuring angular movement or rotation in vehicles is becoming increasingly important as vehicles integrate more technologies and systems to aid their drivers. Many vehicle system options are now controllable via a single rotary knob selector, and previously manual features are being motorized, which requires motor rotation, position, and speed control.

This article discusses how the MagAlpha MAQ470 and MAQ430 automotive-grade angle sensors from Monolithic Power Systems (MPS) can be used to provide a highly reliable and contactless way to measure angles, rotation position, or speed.

Originally published in CODICO Impulse.

December 2019

Optimizing EMI in Switching Regulators  for Consumer and RF-Sensitive Applications

High-efficiency switching regulators enables simple manufacturing using single-layer PCB layout to save cost. Three levels of output current in the same footprint provides flexibility to switch to different devices without PCB changes.

November 2019

Article: Simple, Intelligent, High-Density Power: PMBus Compatible, Monolithic 30A DC/DC Regulator can Parallel up to Eight Phases and Output more than 240A

With the MPQ8645P, the design burden of component selection, optimization, and layout is eliminated, shortening the overall design time, system trouble-shooting, and ultimately improving the time to market.

November 2019

Article: Output Voltage Ripple Measurements and Reduction for DC/DC Voltage Regulators

Analyzes the source of output ripple in a DC/DC voltage regulator, compares the different measurement set-ups, and discusses how to reduce the output ripple.

November 2019

Article: MP6540/40A – 35V, 3A, Monolithic Three-Phase Driver Enables Compact Brushless DC Motor Designs

The use of small electric motors to automate basic mechanical functions has proliferated in recent years as consumers come to expect and appreciate “smart functionality” in their everyday appliances. These motorized mechanisms can be grouped into the category of actuators, and are found in a diversity of applications including consumer appliances, home and industrial automation, and vehicle electronics

October 2019

Article: Introducing the MPM3515-AEC1 Automotive Power Module

The MPM3515-AEC1 is a 36V, 1.5A, high-voltage, automotive-grade power module from Monolithic Power Systems (MPS). This part inherits the key advantages of the MPM module family: very compact size, ease of use, and high performance

October 2019

Article: Highly Integrated Battery-Charging Solution with Innovative Power Path Management

The MP2696A provides a compact design solution for power bank or charging case applications

October 2019

Article: MPQ3326-AEC1 16-Channel Automotive LED Driver Applications

From advanced steerable headlight beams to sophisticated in-cabin mood lighting, the ability to combine individual LED control, color, and brightness opens up a plethora of opportunities to add style and appeal to a vehicle.

October 2019

Article: Simple, Compact, Elegant Hot-Swap Solution for Server Design

Learn how incorporating key elements into a hot-swap solution eliminates repetitive and labor-intensive activities, and allows engineers to address shrinking space constraints and tight project turnaround times. 

September 2019

Article: PCB Design for Low-EMI DC/DC Converters

Read about careful component placement and PCB layout — especially when working within highly regulated industries.

August 2019

Article: Understanding the MagAlpha Digital Filter: Benefits of the MA732 & MA330

This article, second in the series on the MPS MagAlpha magnetic rotary angle sensor family, looks at how the unique SpinaxisTM sensing technology uses digital filtering to achieve the final output resolution, and introduces the MA732 and MA300 versions with programmable filter settings. After sampling the angle via an array of front end Hall elements, the sensor accumulates samples into a modified Kalman-type digital filter which removes noise and increase the final output resolution.

August 2019

Article: MPM38222 - A Simple, Compact Power Solution for Optical Modules.

This article introduces the MPM38222, a high-performance, 6V input, dual 2A power module, which is suitable for optical modules and other space-limited applications. The total solution for a dual 2A resides in a 9mmx7mm area with 90% efficiency and can meet EN55022 Class B emissions. The MPM38222 is available in a small QFN-14 (4mmx4mmx1.6mm) package.

August 2019

Article: Introduction to the MagAlpha Magnetic Angle Sensor Family

Though potentiometers are inexpensive, they suffer from the drawback of being a moving contact-based assembly, which brings the associated issues of mechanical contact wear and susceptibility to damage from external environmental factors including moisture and dirt ingress. Optical encoders offer high accuracy, but come at a higher price due to the complex nature of their construction. Engineers can solve this dilemma by using contactless rotary magnetic angle sensors that implement Hall-effect sensing. 

July 2019

Article: Field-Oriented Control for PMSMs Utilizing a Dynamic Speed Observer

This article presents a promising solution for PMSM FOC as a combination of a low-cost magnetic angular sensor and a dynamic observer to estimate the accurate rotor speed. The algorithm is implemented in the motor control ASIC from MPS. The MA702 provides a high-resolution, on-board angular sensor, so the algorithm avoids the high-dimension matrix inverse calculation

June 2019

Article: Accurate and Precise Automotive Extreme Temperature Testing

It is extremely important for IC manufacturers to be able to design and test products accurately to ensure that they perform as expected across all temperature ranges—even extreme cold or extreme hot.

Originally published in ednasia

June 2019

Article: Motor Driver PCB Layout Guidelines - Part 2

The first part of this article provided some general recommendations for designing printed circuit boards (PCB) using motor driver ICs, which require careful PCB layout for proper performance. Part 2 will discuss some specific PCB layout recommendations for using typical motor driver IC packages.

May 2019

Article: Power Path Management in Charger ICs

The DPPM control loop adjusts the charge current dynamically based on the input source current capability and load current level to achieve a minimum charge time for a given source and system load. With DPPM, the system can obtain power immediately once the input source is applied, even with a deeply discharged battery. The system voltage regulation method is also discussed.

May 2019

Article: Motor Driver PCB Layout Guidelines – Part 1

Motor driver ICs deliver large amounts of current and dissipate a significant amount of power.  Generally, this power is dissipated into copper areas on the printed circuit board (PCB). To ensure adequate cooling, special PCB design techniques are required. Part 1 of this article will provide some general recommendations for designing PC boards that use motor driver ICs.

April 2019

Article: Scalable Current-Sharing E-Fuse Solution

The MP5921 can be scaled to support any current range needed for hot-swap and e-fuse solutions. With a 60-A current rating in a 4 x 5-mm package, the MP5921 provides an extremely dense hot-swap/e-fuse solution. Each MP5921 has built-in protection features that monitor damaged MOSFETs, over-temperature conditions of the internal MOSFET, soft-start watchdog timer, and over-current protection.

April 2019

Article: MPS Smart-Ramp Technology – A Solution to Voltage Change-Induced Audible Noise

Voltage level changes to the processor input power are a necessary power-saving feature that will likely be used for many PC generations to come. When those changes result in audible noise in the PC, manufacturers have had few and expensive options to make their platforms viable for the marketplace. MPS Smart-Ramp audible noise reduction technology provides PC manufacturers with an effective option that is easily implemented.

March 2019

Article: High Power, Fully Integrated, Synchronous Boost Converter with Optimized Features for Portable and Battery-Operated Applications

The MP3432 from MPS is a perfect choice for the first stage of battery-powered systems. The MP3432 can supply 30~40W of power to systems from the battery input target for portable applications and consumes the lowest power possible in standby and idle modes while still providing high efficiency at very low current levels, resulting in a longer battery life and application run time

March 2019
Article: Tackling Automotive Lighting’s Common Challenges with New LED Driver Modules

One of the biggest trends in automotive electronics has been the widespread proliferation of lighting LEDs, as their intrinsic benefits of longevity, small size, and low power consumption are perfectly harmonious with the needs of today’s eco-conscious vehicles. LEDs today are found by the dozens in and around cars. On the inside, they can be found in accent and mood lighting, tell-tales, and digital screen backlights. On the outside, they’re a great fit for everything from turning and position indicators to fog and daytime running lights. In the coming years, LEDs are expected to take over high-power headlamps, which, even as of a few years ago, were still mainly halogen- or Xenon-based.

March 2019
Article: MPS Power Modules Offer A Compact and Ultra-Low Noise Solution for Xilinx Zynq UltraScale+ RFSoC

The growing number of high-performance FPGA and ASIC applications that are driven by the increased bandwidth of wireless networks and data centers demand for power regulators with high power density, fast load transient response, and high efficiency. Xilinx Zynq UltraScale+ RFSoCs integrate multi-giga-sample RF data converters and soft-decision forward error correction (SD-FEC) into a SoC architecture

March 2019

Article: Passive Filter Design Concept of Buck Regulators for Ultra-Low Noise Applications 

Switched-mode power supplies (SMPS) have the advantage of high efficiency compared to traditional low-dropout (LDO) regulators. Due to its switching nature, a SMPS emits noise at its switching frequency and its harmonics. This article illustrates the procedure of designing filtering to achieve ultra-low output voltage noise with SMPS regulators. Single-stage capacitive filter is commonly used for DC/DC converter applications

Originally published in Codico

February 2019

Article: Total Integrated Power Solution for Smart Lighting

The smart lighting devices can be used as a hub, integrated as key component of IoT systems and smart home/smart automation networks. This article will focus on the power solution for smart lighting- in particular smart light bulbs.

Originally published in Power Electronics Europe

February 2019
Article: Good News! MPS’ MP2888A Receives 2018 World Electronics Achievement Award “Power Management/Voltage Converter of the Year”

Last week, the list of the 2018 World Electronics Achievement Awards was unveiled at the Global Double Summit hosted by ASPENCORE, the world's largest media group in the field of electronic technology. The MP2888A from MPS won the title of "Power Management/Voltage Converter of the Year" as the industry's first 10-phase digital controller. MPS becomes one of only three companies that have won this world award.

Originally published in WeChat.

December 2018
Article: Energy Recycling in DC Motor Drives

When decelerating a moving mass in a permanent magnet motor drive, energy stored in the mechanical system may be returned through the motor driver to the power source. If this energy is not properly accounted for, it can cause damage to the motor driver or the rest of the system by causing an increase in the power supply voltage.

In this article, we will look at ways to dissipate this energy safely. To simplify the examples, a DC brush motor is shown. This applies to brushless motor systems as well.

Originally published in EDN.

November 2018
Article: The Linear Charger in Wearable Applications

Wearable devices have become increasingly integrated into our lives. In addition to being used in fitness devices, they have also worked their way into other fields, including medical care, entertainment, security, and finance. In all applications, battery life and component size are two key concerns. Most applications require a small board and low BOM, which means the device should be highly integrated. 

Our new article discusses common issues in earable device applications, including size, programmability, and battery life, and how these issues can be resolved with the MPS MP266x line of linear chargers.

Originally published in Bodo's Power Systems (page 78).

November 2018
Article: High Power, Fully Integrated, Synchronous Boost Converter with Optimized Features for Portable and Battery-Operated Applications

The superior properties of Li-ion batteries, such as high energy density, light weight, no memory effect, and less self-discharge, make them a very popular option in portable applications. ICs with boost topology are needed in portable applications since the voltage fluctuation of most Li-ion batteries ranges from 4.2V (fully charged) to 3.0V (fully discharged), while the post-circuit input voltage is up to 12V or more. Portable applications, such as Bluetooth audio, quick-charge power banks, and portable POS systems employ various boost products available in the market, including discrete controller with external MOSFETs, non-synchronous boost converters with external diode, limited input/output voltage range or features. These solutions take up more space, require more components while providing less efficiency, and compromise performance in terms of noise and reliability.

Originally published in Codico Impulse.

October 2018
Article: Analysis and Simulation of PCB ACR Losses for Vcore DrMOS Optimization

Printed circuit board (PCB) main-loop ripple current resistive losses are often neglected and overlooked as a switching power supply loss component. These losses can be significant for high-current Vcore and other applications that operate with high ripple current. Ansys Q3D is used to extract the main loop ripple current frequency-dependent resistance for a typical Vcore power stage PCB layout. Including this loss component significantly improves the correlation between the modeled and measured total loss as a function of the switching frequency. An analytic expression is developed to optimize the switching frequency for peak efficiency at the balance point between the negative frequency coefficient PCB and passive component losses and the positive frequency coefficient MOSFET conventional switching losses.

Originally published in EDN.

September 2018
Article: Capacitive Isolation: A Fundamental Building Block in Future AC/DC Power Conversion

Capacitive isolation is a mature solution developed over the past decade to replace optocouplers in signal isolators, isolated gate drivers, isolated transceivers, and other applications. However, the potential to use capacitive isolation to replace optocouplers in offline adaptors is often neglected. This articles explains why capacitive isolation can be a fundamental building block in future AC/DC power conversion, how it exceeds the performance of other isolation technologies, and the unique advantages it can bring to end applications.

Originally published in Power Systems Design.

September 2018
Article: Plug & Play Digital Programmable Power Modules Enable Rapid Prototyping of Power Supply

Power designers often face two challenges during product development: scheduling overrun and cost overrun. Changes in specifications and failing to meet target specifications are two of the most common reasons for project delay and budget overrun. To meet target specifications, power engineers may have to do a complete redesign of the power supply during the prototyping stage. It is often overlooked, but the power supply is one of the most essential part of all hardware products. A high-efficiency power supply design directly benefits the overall system cooling requirement, thereby reducing the cost and volume of the final product. A low-noise power solution design ensures that the final products pass applicable EMI standards, such as IEC EN61000. In some applications, such as data transceivers and DAC/ADCs, the performance of a product is highly dependent on the design and noise level of the power supplies.

Originally published in Power Electronics Europe - September 2018.

September 2018
Article: A Charger IC, N Kinds of Applications

Many portable and hand-held applications, such as e-cigarettes, gimbals, Bluetooth speakers, and point-of-sale machines, draw their power from a 2-series cell battery and must also be USB compliant. This poses design challenges, as batteries are typically expected to maintain a long charge, but the design cannot be crowded with multiple components. The ideal solution would include bidirectional operation, cell balancing, and appropriate protection features.

Our new article discusses how the MP2639A is a natural pick because of its functional diversity, control flexibility, and high reliability. The MP2639A is a fully integrated and flexible battery charge management IC that can charge two cells in series from a 5V power supply with up to 15W of power from a USB-C port.

Originally published in Bodo's Power Systems (page 36).

August 2018
Article: High-Voltage Analog Switches for Medical Ultrasound

High-voltage supplies are used in most HV analog switches, which creates cost, size, and safety concerns. Switches developed by MPS offer an alternative by eliminating those supplies.

Originally published in Electronic Design.

June 2018
Article: High-Performance Solenoid Drives

Solenoids are used in many applications to provide linear or rotational actuation in mechanical systems. Although driving solenoids can be as simple as switching the current flow on and off, oftentimes better performance can be obtained using a dedicated IC to drive them. In this article, we will examine how drive circuitry affects the electromechanical performance of solenoids. Two different drive circuits will be compared: a simple switch and a current regulating driver. Energy-saving techniques that limit power dissipation in the solenoid will also be illustrated.

Originally published in Electronic Design

May 2018
Article: Introducing the MagAlpha MAQ430 & MAQ470: 12-Bit, Automotive-Grade, Magnetic Angle Sensors

Measuring angular movement or rotation in vehicles is becoming increasingly important as vehicles integrate more technologies and systems to aid their drivers. Many vehicle system options are now controllable via a single rotary knob selector, and previously manual features are being motorized, which requires motor rotation, position, and speed control.

This article discusses how the MagAlpha MAQ470 and MAQ430 automotive-grade angle sensors from Monolithic Power Systems (MPS) can be used to provide a highly reliable and contactless way to measure angles, rotation position, or speed.

Originally published in CODICO Impulse.

May 2018
 Article: What They Don’t Teach About Synchronous Rectifiers in School – Selected Topics from Real Designs

In recent years, global regulatory agencies have proposed efficiency standards to further improve global energy savings. It has become mandatory for manufacturers to improve the efficiency of existing standalone power supply products to meet DoE Level VI in order to sell them to the US market. Additionally, manufacturers are also expected to design products under other energy specifications, such as EU CoC V5Tier2 specs.

Orignally published in Bodo's Power Systems.

May 2018
Article: Intelligent Scalable DC/DC Power Modules Provide up to 250A Output Current

The growing number of high-performance FPGA and ASIC applications that are driven by the increased bandwidth of wireless networks and data centers require power regulators with high power density, fast load transient response, and intelligent power-management features. The MPM3695 series of power modules with integrated inductors from Monolithic Power Systems (MPS) offers a versatile solution for powering FPGAs and ASICs by offering up to 60 % higher power density compared to discrete point-of-load (POL) solutions, simplified PCB layout and power stage design, minimal external components, and minimal expertise requirement for the power converter and compensation network design.

Orignally published in Power Electronics Europe.

May 2018
Article: Teardown of USB Charging Module in Mercedes Benz E-Class Cars—How the MPQ448x Family Simplifies Design

A 12-USB charging port design was first seen in the new E-Class line of cars from Mercedes Benz in China. Knowing that designing even a single USB charging port in a car is very specific and difficult considering protection and voltage conversion functions, how is twelve even possible? Our new article explores the ins and outs of automotive USB charging and breaks down an MPS MPQ448x module to see exactly how this feat was accomplished.

Originally published in WeChat (Chinese).

January 2018
Article: Increasing the Power Density and Efficacy of Datacenters Using a Two-Stage Solution for 48V Power Distribution

Current datacenters typically have a 12-V backplane and distribution on board and need to convert the voltage down to around 1 V, which is usually achieved with a synchronous buck regulator, single- or multi-phase. The racks in these datacenters normally max out at a power rating of 20 kW. There is a need in the industry to increase the power density per-rack to about 100 kW to reduce the size of these datacenters. This can be achieved by using a 48 V backplane and distribution, but there are challenges associated with this approach. To drive 48 V down to the board, traditional synchronous buck regulators cannot be relied on. How, then, does one increase the density of datacenters without also increasing cost? This paper outlines a two-stage solution to drive 48 V down to the point of load (PoL, approximately 1 – 5 V) in a flexible, scalable, and cost-effective manner that will benefit the next generation of server power delivery.

Originally published in Power Electronics News.

October 2017
Article: MPS Smart Ramp Technology - A Solution to Voltage Change-Induced Audible Noise

Audible noise in voltage regulator (VR) systems has been a problem for a very long time now. In the PC industry, the issue became more pronounced as the CPU became responsible for significant and repetitive voltage changes that induced noise through the VR. Those voltage changes, along with the physical properties of ceramic capacitors and the motherboard, produce an audible noise problem for the PC manufacturer with no good solutions so far. MPS had addressed the voltage change-induced audible noise issue by introducing MPS Smart-Ramp technology.

Originally published in AllAboutCircuits.

May 2017
Article: Tackling Automotive Lighting's Common Challenges with New LED Driver Modules

LED lighting is one of the fastest growing segments in automotive electronics, but it is not without its own unique challenges. This article describes several major constraints facing today’s lighting designers and explores how these can be addressed by MPS’s new MPM6010-AEC1 automotive LED module.

Originally published in Codico Impulse.

March 2017