MPQ3364 4-Channel, Maximum 150mA/Ch Boost WLED Driver with 15000:1 2 Dimming Ratio and I C, AEC-Q100 DESCRIPTION FEATURES The MPQ3364 is a step-up converter with 4 3.5V to 36V Input Voltage Range channel current sources. The device is 4 Channels with Maximum 150mA per designed to drive white LED arrays as Channel backlighting for small- or medium-sized LCD Internal 100m, 50V MOSFET panels. Configurable f Up to 2.2MHz SW External Sync SW Function The device uses peak current mode as its PWM Multi-Dimming Operation through PWM control architecture to regulate the boost Input, Including: converter. Four channel current sources are o Direct PWM Dimming applied to the LED cathode to adjust LED o Analog Dimming brightness. The MPQ3364 regulates the current o Mix Dimming with 25% or 12.5% in each LED string to the value set by an Transfer Point external current-setting resistor, with 2.5% 15000:1 Dimming Ratio in PWM Dimming current regulation accuracy between strings. when f 200Hz PWM A low on resistance MOSFET and headroom 200:1 Dimming Ratio during Analog voltage are provided to improve efficiency. The Dimming through PWM Dimming Signal 2 MPQ3364 has a standard I C digital interface Input for easy use. The switching frequency can be Excellent EMI Performance, Frequency 2 configured via a resistor, I C interface, or Spread Spectrum external clock. 2 I C Interface with 3 Selectable IC The MPQ3364 provides analog, PWM, and mix Addresses dimming modes with a PWM input. The Phase Shift Function for PWM Dimming 2 dimming mode can be selected via the I C 2.5% Current Matching interface or the MIX/AD pin. The device also Cycle-by-Cycle Current Limiting has a phase shift function to eliminate noise Disconnect VOUT from VIN during PWM dimming. Optional LED Current Can Automatically Decrease at Higher Temperatures Robust protections are included to guarantee safe operation of the device. Protection modes LED Short/Open, OTP, OCP, and Inductor include over-current protection (OCP), over- Short Protection voltage protection (OVP), over-temperature Configurable LED Short Threshold protection (OTP), LED short, and LED open Configurable OVP Threshold protection. The MPQ3364 can automatically Fault Indicator Signal Output decrease the LED current at higher Available in a QFN-24 (4mmx4mm) temperatures. Package Available in AEC-Q100 Grade 1 The MPQ3364 is available in a QFN-24 (4mmx4mm) package. APPLICATIONS Tablets and Notebooks Automotive Displays All MPS parts are lead-free, halogen-free, and adhere to the RoHS directive. For MPS green status, please visit the MPS website under Quality Assurance. MPS, the MPS logo, and Simple, Easy Solutions are trademarks of Monolithic Power Systems, Inc. or its subsidiaries. MPQ3364 Rev. 1.1 MonolithicPower.com 1 7/7/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2021 MPS. All Rights Reserved. 2 MPQ3364 4-CH BOOST WLED DRIVER WITH HIGH DIM RATIO AND I C, AEC-Q100 TYPICAL APPLICATION L1 D1 VIN VOUT C1 C2 GND C3 R2 R3 R6 24 23 22 21 20 19 R4 18 1 PWM DIM SW R5 2 17 MIX/AD PGND R1 3 16 FREQ/SYNC LED1 4 15 EN MPQ3364 EN 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 MPQ3364 Rev. 1.1 MonolithicPower.com 2 7/7/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2021 MPS. All Rights Reserved. COMP VIN SD FF ISET VCC ADR AGND STH AGND OVP AGND String 1 String 2 String 3 String 4