- MP3317
MP3317
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Description
The MP3317 is a boost converter with 6-channel current sources designed to drive WLED arrays for LCD panels in virtual reality (VR) backlighting applications.
The MP3317 uses peak current mode and pulse-width modulation (PWM) control to maintain boost converter regulation. The integrated 6 channels of the LED current source support a maximum of 160mA per channel with 2.5% LED current (ILED) accuracy, and 1.5% matching accuracy. The device supports direct PWM dimming for the left and right LCD panels through two PWM dimming signal input pins (PWML and PWMR).
The MP3317 provides high efficiency due to its low headroom voltage for LED regulation and the switching MOSFET's low on resistance (RDS(ON)).
The MP3317 employs a standard I2C digital interface to enable channels and set the operation, switching frequency (fSW), LED current amplitude, cycle-by-cycle current limit, input current limit, and various protection thresholds.
For system reliability, the MP3317 integrates rich protections, including open LED protection, short LED protection, short LEDx-to-GND protection, cycle-by-cycle current limiting, input over-current protection (OCP-IN), over-current protection with latch-off mode (OCLATCH), ISET short protection, ISET open protection, over-voltage protection (OVP), and over-temperature protection (OTP).
The MP3317 is available in a WLCSP-20 (1.75mmx2.45mm) package.
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Features & Benefits
- 2.5V to 33V Input Voltage (VIN) Range
- Up to 34V Output Voltage (VOUT)
- 6 Channels with Maximum 160mA/Channel
- Integrated 35V, 120mΩ Low-Side Power MOSFET (LS-FET)
- 400mV LED Regulation Voltage at 120mA
- 2.5% LED Current (ILED) Accuracy with 1.5% ILED Matching
- 312kHz/625kHz/1250kHz Configurable Switching Frequency (fSW)
- I2C Interface with Two IC Addresses
- Two External Pulse-Width Modulation (PWM) Dimming Pins: PWML and PWMR
- Direct PWM Dimming/Analog Dimming
- Independent Group ILEDL/ILEDR Amplitude
- 12-Bit Analog Dimming Resolution
- Input PWM On Time Limitation
- One-Time Programmable Memory for Customizable Default Register Values
- Open/Short LED Protection
- LEDx Short-to-GND Protection
- Over-Temperature Protection (OTP)
- Cycle-by-Cycle Over-Current Protection (OCP)
- Input Over-Current Protection (OCP-IN)
- OCP with Latch-Off Mode (OCLATCH)
- ISET Pin Open/Short Protection
- Available in a WLCSP-20 (1.75mmx2.45mm) Package
Active Part Numbers:
MP3317GC-xxxx-Z MP3317GC-xxxx-P MP3317GC-0000-Z MP3317GC-0000-P
Part numbers ending in P and Z are the same parts. P and Z only indicates reel size.
Meaning of P & Z
MP3317 Resources
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APPLICATION
VIRTUAL/AUGMENTED REALITY HEADSETS & GLASSESAPPLICATIONVirtual reality (VR) and augmented reality (AR) headsets and glasses are an increasingly popular wearable application that allows users to immerse themselves in a holistic audiovisual experience. The nature of these wearable devices means they must be lightweight, comfortable, and fairly durable as well as responsive to multi-sensory feedback and haptics. New designs are expected to offer longer b...
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APPLICATION
TABLET PCSAPPLICATIONTablets, along with other mobile devices, are one of todays largest consumer technology markets. As this market continues to grow, it is changing and increasing in complexity faster than ever. Tablets are expected to have virtually the same processing power and capabilities as a laptop/notebook PC, in addition to nearly the same level of portable convenience as a smartphone. This crossover of cons...
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APPLICATION
NOTEBOOKS (IMVP8)APPLICATIONNotebook computers and laptops are a crucial device for many consumers and businesses, and therefore need to be able to offer reliable performance and a streamlines user experience in a slim package. As new technologies and applications continue to enter the market, notebooks and laptops must balance increasing processing performance and efficiency demands with customer expectations for small, lig...
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PRODUCT CATEGORY
BACKLIGHT DRIVERS (WLED)PRODUCT CATEGORY -
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