MP3317 2.5-33V, 160mA, 6CH, 1250kHz Boost WLED Driver WLCSP-20

Product

MP3317 2.5-33V, 160mA, 6CH, 1250kHz Boost WLED Driver WLCSP-20

Share

pMPS MP3317 — Boost WLED Driver, 2.5-33V input, 160 mA output, 6 channels, WLCSP-20./p

[email protected]

MPS WLCSP-20 LED Drivers Boost WLED LED Power Management

Product Details
Download

MP3317 2.5-33V, 160mA, 6CH, 1250kHz Boost WLED Driver WLCSP-20

The MPS MP3317 is a Boost WLED Driver. It operates from a 2.5 V to 33 V input, is rated for 160 mA, drives 6 LED strings and switches at 1250 kHz. It is supplied in a WLCSP-20 package.

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.

Key Specifications

Part Number	MP3317
Function	Boost WLED Driver
Input Voltage	2.5 V to 33 V
Output Voltage	34 V
Current Rating	160 mA
Channels	6
Switching Frequency	1250 kHz
Interface	I²C
Package	WLCSP-20
Ordering Codes	MP3317

Features

2.5V to 33V Input Voltage (VIN) Range
Up to 34V Output Voltage (VOUT)
6 Channels with Maximum 160mA/Channel
Integrated 35V, 100mΩ Low-Side Power MOSFET (LS-FET)
400mV LED Regulation Voltage at 120mA
2.5% LED Current (ILEDx, where x = 1–6) Accuracy, 2% ILEDx Matching
Configurable 312kHz/625kHz/1250kHz Switching Frequency (fSW)
I2C Interface with Two IC Addresses
Two External Pulse-Width Modulation (PWM) Dimming Pins: PWML and PWMR
Direct PWM Dimming and Analog Dimming

Typical Application Circuit

Applications

Virtual Reality (VR)

Design Notes

Channel-to-channel current matching sets backlight uniformity; check the matching spec at the current you will actually run.
In boost topologies the OVP threshold must clear the worst-case forward voltage of the longest string, including temperature and binning spread.
Keep PWM dimming above 200 Hz to stay clear of visible flicker, and away from the audio band if the product has a speaker.
Size the inductor and output capacitor for the string current ripple, not the total LED current.