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MP18871
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Description
The MP18871 is an isolated, half-bridge gate driver solution with up to 4A of source and sink peak current capability. The gate driver is designed to drive power switching devices with a short propagation delay and minimal pulse-width distortion. By utilizing MPS's proprietary, capacitive-based isolation technology, the driver can provide up to 5kVRMS withstand voltage (per UL 1577) (SOIC wide-body package options). It can also provide a common-mode transient immunity (CMTI) rating above 100kV/μs between the input side and output driver. These advanced features enable high efficiency, high power density, and robustness for a wide variety of power applications.
The MP18871 integrates dual-channel gate drivers in one package. Each output can be grounded to the separated grounds, or connected to a positive or negative voltage reference. The secondary topology can be configured as a half-bridge high-side (HS) and low-side (LS) driver, controlled by a single PWM input signal. To prevent shoot-through in the half-bridge driver, the MP18871 provides a configurable dead time, which is set via an external resistor.
A wide primary-side VDDI supply voltage (VDDI) range makes the driver suitable to be interfaced with 3.3V and 5V digital controllers. The secondary-side driver can accept up to a 30V supply. All of the supply voltage pins feature multiple under-voltage lockout (UVLO) protection options.
The MP18871 is available in SOIC-16 NB (narrow body), SOIC-16 WB (wide body), and LGA-13 (5mmx5mm) packages.
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Features & Benefits
- Up to 5kVRMS Input to Output Isolation (SOIC-16 WB Package)
- 1500VDC Functional Isolation between Two Secondary-Side Drivers (SOIC-16 NB and SOIC-16 WB Packages)
- 700VDC Functional Isolation between Two Secondary-Side Drivers (LGA-13 Package)
- >100kV/μs Common-Mode Transient Immunity (CMTI)
- 2.8V to 5.5V Input VDDI Voltage (VDDI) Range to Interface with TTL- and CMOS-Compatible Inputs
- Up to 30V Output Drive Supply with Several Under-Voltage Lockout (UVLO) Protection Options
- 4A Source, 4A Sink Peak Current Output
- 50ns Typical Propagation Delay
- Overlap Protection and Configurable Dead Time Control
- -40°C to +125°C Operating Temperature Range
- UL 1577 Certified:
- SOIC-16 NB: 3kVRMS Isolation for 60s
- SOIC-16 WB: 5kVRMS Isolation for 60s
- LGA-13: 2.5kVRMS Isolation for 60s
- DIN EN IEC 60747-17 (VDE 0884-17) 2021-10 Certified:
- SOIC-16 NB: 4242VPK Isolation
- SOIC-16 WB: 6000VPK Isolation
- LGA-13: 3535VPK Isolation
- CQC Certified per GB 4943.1-2011
- Available in SOIC-16 NB, SOIC-16 WB, and LGA-13 (5mmx5mm) Packages
Active Part Numbers:
MP18871-A4BGLU-Z MP18871-A4BGLU-P
Part numbers ending in P and Z are the same parts. P and Z only indicates reel size.
Meaning of P & Z
MP18871 Resources
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APPLICATION
DC FAST CHARGING STATIONAPPLICATIONDC fast charging stations are becoming more common with the increased adoption of electric vehicles. Charging stations are a vital part of the infrastructure along major highways and populated suburbs, ensuring that electric vehicles have a place to charge during long-distance travel and day-to-day driving. These systems are often comprised of multiple 25kW to 75kW modules to create fast charging ...
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ARTICLE
BUILDING POWER SYSTEMS WITH THE MP188XX ISOLATED GATE DRIVER SERIESARTICLEPower is essential to 5G communication, data centers, photovoltaic inverters, on-board power supplies, charging piles, and LED control systems. Across these power systems, an isolated gate driver is required to drive the switch tube efficiently and reliably for power conversion. An isolated gate driver is characterized by a small charger and large gate transmission. These drivers are widely use...
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ARTICLE
HOW INTEGRATION IS ADVANCING INNOVATIONS IN POWER MANAGEMENTARTICLEAs modern devices become smarter and more customizable, consumers are also demanding that they be smaller and more powerful. This has driven demand for technology that can manage thermals with ever-higher power densities as processing power increases. MPS is innovating and creating highly integrated converters and controllers with cutting-edge efficiency and power density. By integrating the entir...
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PRODUCT CATEGORY
ISOLATED GATE DRIVERSPRODUCT CATEGORY -
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MPSCHOLAR
APPLICATIONS & USE CASES OF ISOLATED POWER SUPPLIES IN GATE DRIVINGMPSCHOLARIn a wide variety of applications, ranging from electric automobiles to industrial machinery, variable-speed AC/DC drives play a crucial role in managing the speed and torque of electric motors. Functionality: The speed of an electric motor can be adjusted by these drives by adjusting the power that is provided to them. This is accomplished by modulation techniques such as pulse width modulation ...
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MPSCHOLAR
CHALLENGES AND SOLUTIONS IN DESIGNING ISOLATED POWER SUPPLIES FOR GATE DRIVINGMPSCHOLARThe process of designing an isolated power supply for gate driving involves a unique set of challenges, particularly when it comes to resolving electrical requirements. These issues, which include power output and stability in addition to electromagnetic interference (EMI), call for the development of creative solutions in order to guarantee the effective and dependable operation of gate drivers i...
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MPSCHOLAR
TYPES OF ISOLATED POWER SUPPLIES FOR GATE DRIVERSMPSCHOLARFlyback converters are an essential type of isolated power supply commonly found in gate driver circuits. They are particularly well-suited for applications that prioritize compact size, efficiency, and reliable isolation at lower to moderate power levels. Known for their simplicity and versatility, flyback converters operate by storing energy in a magnetic field during one phase and transferring ...
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MPSCHOLAR
ISOLATED POWER SUPPLY ARCHITECTURESMPSCHOLARCentralized isolated power supply architectures play a crucial role in gate driver applications, offering a streamlined approach to power distribution and isolation that is specifically designed to meet the needs of gate driving requirements. This architecture type centralizes the power supply into a single unit, which then distributes power to different components of the system, ensuring electric...
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MPSCHOLAR
NEED FOR ISOLATED GATE DRIVING POWER SUPPLIESMPSCHOLARFundamental Safety Concerns: Ensuring safety is of utmost importance when it comes to gate-driving power supplies, especially in high-power applications. Isolation is essential for ensuring users' safety and preventing damage to sensitive electronic components caused by high voltage levels or electric shock. Protection Against Direct Contact: Isolation guarantees that there is no direct elec...
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MPSCHOLAR
ISOLATED POWER SUPPLIES FOR GATE DRIVINGMPSCHOLAR -
MPSCHOLAR
CASE STUDY: AN IN-DEPTH LOOK AT A SPECIFIC APPLICATIONMPSCHOLARWithin the context of an advanced electric vehicle (EV) powertrain system, the development of isolated gate drivers is the primary emphasis of this individual case study. Power economy, dependability, and safety are of the utmost importance in the electric vehicle industry, which is a sector that is quickly evolving. The purpose of this in-depth investigation is to demonstrate the significant role...
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MPSCHOLAR
PRACTICAL APPLICATIONS AND USE CASESMPSCHOLARFigure 1: Common Applications of Isolated Drivers Isolated gate drivers, as essential interfaces between control circuits and power electronics are essential components in motor control systems. These drivers are important to the operation of these systems. The power switches, such as IGBTs or MOSFETs are responsible for controlling the speed, torque, and direction of the motor. Their contribut...
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MPSCHOLAR
CHALLENGES IN ISOLATED GATE DRIVERS DESIGNMPSCHOLARThermal management and heat dissipation are two of the most critical issues that arise during the design process of isolated gate drivers. These elements are quite important because temperature has an effect on gate drivers' dependability, performance, and longevity. Heat Generation Sources: In isolated gate drives, the primary sources of heat generation are two different sources, respectively. F...
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MPSCHOLAR
COMPONENTS AND ARCHITECTUREMPSCHOLARPulse-Width Modulation (PWM) Signals: PWM signals play a crucial role in the functioning of isolated gate drivers, particularly in the realm of power electronics. These signals adjust the length of time that power switches (such as MOSFETs or IGBTs) remain in the 'on' state by modifying the width of the pulse while maintaining a consistent frequency. PWM signals play a vital role in the regulation...
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MPSCHOLAR
WORKING PRINCIPLES OF ISOLATED GATE DRIVERSMPSCHOLAREnsuring the safety and integrity of electronic systems is of utmost importance, especially in applications involving high voltages or where electrical isolation is necessary between the control and power stages. Figure 1: Isolated Gate Driver Concept Protecting Control Circuitry: One of the main purposes of isolation in gate drivers is to safeguard the low-voltage control circuitry from the p...
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MPSCHOLAR
INTRODUCTION TO GATE DRIVERSMPSCHOLARGate drivers are essential components in modern electronics. They are specialized circuits that have the important task of controlling the operation of power switches, such as MOSFETs and IGBTs. Their main purpose is to supply the required drive voltage and current to the gate of these power devices. Figure 1: Gate Drive between Microcontroller and Power Transistor Fundamental Role: Gate drive...
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MPSCHOLAR
ISOLATED GATE DRIVERSMPSCHOLAR -
ARTICLE
DESIGNING ONBOARD CHARGERS FOR HIGH PERFORMANCE AND POWER DENSITYARTICLEElectric vehicles (EVs) are becoming more ubiquitous each day, with plenty of countrywide and global incentives to make these vehicles more cost-effective for consumers (see Figure 1). This has resulted in more than 13 million electrified vehicle sales in 2023, which is a greater than 30% increase for battery electric vehicles (BEV) and plug-in hybrid electric vehicles (PHEV) when compared to the ...
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PRODUCT
MPQ18851PRODUCTAutomotive, Isolated, Independent, Dual-Channel Gate Driver
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PRODUCT
MPQ18831PRODUCTAutomotive, Isolated, Dual-Input Half-Bridge Gate Driver
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ARTICLE
DRIVE SAFE: ISOLATED GATE DRIVERS FOR HIGH-POWER APPLICATIONSARTICLENew technological and market trends are constantly pushing for smaller solutions with higher power capabilities. The advancement of electric vehicles, renewable energy microgrids, massive energy storing, and high-power telecom applications have significantly increased power density requirements. Voltage and power levels that were previously reserved for specific, high-power applications are becom...
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