MP3326 16 Channels, 50mA/Ch, LED Driver with Separated PWM Analog 2 Dimming and I C Interface DESCRIPTION FEATURES The MP3326 is a 16-channel WLED driver that Wide 4V to 16V Input Voltage Range can operate from a wide 4V to 16V input voltage 16 Channels, 50mA/Ch Maximum (V IN range. The MP3326 applies 16 internal current 4.5V) sources in each LED string terminal. The LED LED Current Configured by External current of each channel is set by an external Resistor current-setting resistor. The maximum current of 6-Bit Analog Dimming for Each Channel each channel is up to 50mA (V 4.5V). IN 12-Bit PWM Dimming for Each Channel 2 Selectable 220Hz, 250Hz, 280Hz, or 330Hz The device integrates an I C interface with up to 2 PWM Dimming Frequency 10 configurable I C addresses via an external Refresh Signal Output resistor. This means the MP3326 can support up 2 to 10 cascaded ICs to drive the LED array. Each I C Interface channel can be enabled or disabled through the 10 Addresses Configurable via External 2 I C. Resistor Configurable LED Current Slew Rate The MP3326 employs both separated PWM 40s Phase Shift dimming and analog dimming for each LED Fault Indicator channel, as well as 12-bit resolution PWM LED Open-Load Protection dimming and 6-bit analog dimming for each LED Short Protection with Configurable channel. To optimize EMI/EMC performance, Threshold the LED current ramp rate and phase shift can Under-Voltage Lockout (UVLO) be configured. Over-Temperature Protection (OTP) The device can output a refresh signal from the ELV Directive II Compliance RFSH/FLT pin, and the refresh signal frequency Available in a QFN-24 (4mmx4mm) can be set by the register. Package Open-load protection, short protection, and over- APPLICATIONS temperature protection (OTP) are integrated into the device. The fault indicator pulls low if a RGB Drivers protection is triggered, and then the LED Indicators corresponding fault register is set. Instrument Clusters General Displays The MP3326 is available in a QFN-24 (4mmx4mm) package. LED Backlighting 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. MP3326 Rev. 1.0 www.MonolithicPower.com 1 1/4/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2021 MPS. All Rights Reserved. 2 MP3326 16-CHANNEL LED DRIVER WITH I C AND SEPARATED PDIM/ADIM TYPICAL APPLICATION VIN LED116 VIN MP3326 RFSH/ RFSH/ FLT FLT SCL SDA GND ADDR ISET EN EN SCL SDA Figure 1: Typical Application Circuit 5V V BATT SW MPQ4415 R1 FB R2 MP3326 MP3326 MP3326 2 I C SCL/SDA /FLT R R R R R R ADDR ISET ADDR ISET ADDR ISET Figure 2: System Application Circuit MP3326 Rev. 1.0 www.MonolithicPower.com 2 1/4/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2021 MPS. All Rights Reserved. LED16 LED15 R ADDR LED2 LED1 R ISET