MP3367 6-Channel, Max.150mA/Ch Boost WLED Driver 2 with 15000:1 Dim Ratio and I C DESCRIPTION FEATURES The MP3367 is a step-up converter with six 3.5V to 36V Input Voltage Range channel current sources, designed to drive white Six Channels with Max 150mA per LED arrays as backlighting in small-to-mid-size Channel LCD panels. Internal 100m, 50V MOSFET Programmable Up to 2.2MHz f SW The MP3367 uses peak current mode as its External Sync SW Function PWM control architecture to regulate the boost Multi-Dimming Operation Mode through converter. Six channel current sources are PWM Input, Including: applied into the LED cathode to adjust the LED o Direct PWM Dimming brightness. The MP3367 regulates the current in o Analog Dimming each LED string to the value set by an external o Mix Dimming with 25%/12.5% current-setting resistor, with 2.5% current Transfer Point regulation accuracy between strings. 15000:1 Dim Ratio in PWM Dim at f PWM The MP3367 employs a low on-resistor 200Hz MOSFET and a low headroom voltage, designed 200:1 Dim Ratio at Analog Dim through 2 for higher efficiency. It has a standard I C digital PWM Dim Signal Input interface for ease of use. The switching Excellent EMI Performance, Frequency 2 frequency can be programmed by a resistor, I C Spread Spectrum interface, or external clock. 2 I C Interface The MP3367 provides analog, PWM, and mix Phase Shift Function for PWM Dimming dimming mode with a PWM input. Dimming 2.5% Current Matching 2 mode can be selected with the I C interface or Cycle-by-Cycle Current Limit the MIX/AD pin. It also has a phase shift function Disconnect VOUT from VIN to eliminate noise during PWM dimming. Optional LED Current Auto-Decrement at Robust protections are included to guarantee High Temperatures safe operation of the device. Protection modes LED Short/Open, OTP, OCP, and Inductor include over-current protection (OCP), over- Short Protections voltage protection (OVP), over-temperature Programmable LED Short Threshold protection (OTP), LED short, and open Programmable OVP Threshold protection. There is also an option that Fault Indicator Signal Output automatically decreases the LED current at Available in QFN-24 4mmx4mm and higher temperatures. TSSOP28-EP Packages The MP3367 is available in QFN-24 4mmx4mm APPLICATIONS and TSSOP28-EP packages. Tablet/Notebook All MPS parts are lead-free, halogen free, and adhere to the RoHS directive. For MPS green status, visit the MPS website under Quality Assurance. MPS, the MPS logo, and Simple, Easy Solutions are registered trademarks of Monolithic Power Systems, Inc. or its subsidiaries. MP3367 Rev. 1.0 www.MonolithicPower.com 1 6/17/2019 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2019 MPS. All Rights Reserved. 2 MP3367 6-CHANNEL BOOST WLED DRIVER WITH HIGH DIM RATIO AND I C TYPICAL APPLICATION L1 D1 VIN VOUT C1 C2 GND C3 R2 R3 24 23 22 21 20 19 R4 1 18 PWM DIM SW R5 2 17 MIX/AD PGND R1 3 16 FREQ/SYNC LED1 4 15 EN EN MP3367 LED2 5 14 SCL SCL/PSE LED3 6 13 SDA/PSE LED4 SDA 7 8 9 10 11 12 R9 R8 R7 C4 VCC FF MP3367 Rev. 1.0 www.MonolithicPower.com 2 6/17/2019 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2019 MPS. All Rights Reserved. COMP VIN SD FF ISET VCC FSP AGND STH LED6 OVP LED5 String 1 String 2 String 3 String 4 String 5 String 6