MPQ3369GR-P

MPQ3369 6-Channel, Maximum 100mA/Ch Boost WLED Driver with 15000:1 Dim Ratio and I2C DESCRIPTION The MPQ3369 is a step-up converter with six channel current sources. It is designed to drive white LED arrays as backlighting for small- or medium-sized LCD panels. The device uses peak current mode as its PWM control architecture to regulate the boost converter. Six channel current sources are applied into the LED cathode to adjust the LED brightness. The MPQ3369 regulates the current in each LED string to the value set via an external current-setting resistor, with 2.5% current regulation accuracy between strings. A low on resistor MOSFET and a low headroom voltage are provided to improve efficiency. The MPQ3669 has a standard I2C digital interface for easy use. The switching frequency can be configured via a resistor, I2C interface, or external clock. The MPQ3369 provides analog, PWM, and mix dimming modes with a PWM input. The dimming mode can be selected with the I2C interface or the MIX/AD pin. The device also has a phase shift function to eliminate noise during PWM dimming. FEATURES                Robust protections guarantee safe operation of the device, and include over-current protection (OCP), over-voltage protection (OVP), overtemperature protection (OTP), and LED short and open protection. The MPQ3669 can also be configured to automatically decrease the LED current at high temperatures.  The MPQ3369 is available in a QFN-24 (4mmx4mm) package.      3.5V to 36V Input Voltage Range 6 Channels with Max 100mA per Channel Internal 100mΩ, 50V MOSFET Configurable Switching Frequency Up to 2.2MHz External Sync SW Function Multi-Dimming Operation Mode through PWM Input, Including: o Direct PWM Dimming o Analog Dimming o Mix Dimming with 25% or 12.5% Transfer Point 15000:1 Dimming Ratio in PWM Dimming at fPWM ≤ 200Hz 200:1 Dimming Ratio at Analog Dimming through PWM Dimming Signal Input Excellent EMI Performance, Frequency Spread Spectrum I2C Interface Phase Shift Function for PWM Dimming 2.5% Current Matching Cycle-by-Cycle Current Limit Disconnect VOUT from VIN Optional LED Current Auto-Decrement at High Temperatures LED Short/Open, OTP, OCP, Inductor Short Protection Configurable LED Short Threshold Configurable OVP Threshold Fault Indicator Signal Output Allow to Connect Multiple LEDx Pins for One LED String Available in a QFN-24 (4mmx4mm) Package APPLICATIONS   Tablets/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. MPQ3369 Rev. 1.0 www.MonolithicPower.com 4/17/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 1 MPQ3369 – 6-CHANNEL, BOOST WLED DRIVER W/ HIGH DIM RATIO AND I2C TYPICAL APPLICATION L1 D1 VOUT VIN C1 C2 GND C3 R2 6 7 8 9 String 6 String 5 String 4 String 3 String 2 String 1 OVP FSP STH SD VCC R4 18 LED5 SDA 5 19 SW 17 PGND 16 FREQ/SYNC LED1 15 EN MPQ3369 LED2 14 SCL/PSE LED3 SDA/PSE LED4 13 LED6 4 EN SCL DIM MIX/AD AGND 3 22 21 20 ISET R1 2 FF R5 COMP PWM 1 VIN 24 23 R3 10 11 12 R9 R7 R8 C4 VCC FF MPQ3369 Rev. 1.0 www.MonolithicPower.com 4/17/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 2 MPQ3369 – 6-CHANNEL, BOOST WLED DRIVER W/ HIGH DIM RATIO AND I2C ORDERING INFORMATION Part Number* MPQ3369GR* Package QFN-24 (4mmX4mm) Top Marking See Below MSL Rating 1 * For Tape & Reel, add suffix –Z (e.g. MPQ3369GR–Z). TOP MARKING MPS: MPS prefix Y: Year code WW: Week code MP3369: Part number LLLLLL: Lot number PACKAGE REFERENCE TOP VIEW VIN 24 SD 23 VCC 22 FSP 21 STH 20 OVP 19 DIM 1 18 SW MIX/ 2 AD 17 PGND FREQ/ 3 SYNC 16 LED1 EN 4 15 LED2 SCL/ 5 PSE 14 LED3 SDA/ 6 PSE 13 LED4 7 COMP 8 FF 9 ISET 10 11 AGND LED6 12 LED5 QFN-24 (4mmx4mm) MPQ3369 Rev. 1.0 www.MonolithicPower.com 4/17/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 3 MPQ3369 – 6-CHANNEL, BOOST WLED DRIVER W/ HIGH DIM RATIO AND I2C PIN FUNCTIONS Pin # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Name Description PWM signal input pin. Apply a PWM signal on DIM for brightness control. This pin is pulled low internally. It is recommended to set the PWM signal between 100Hz and 20kHz. Dimming mode set pin. MIX/AD is a current-source output (18μA). Connect a resistor to MIX/AD to program its voltage. When MIX/AD is at a low level (