Automotive, 48-channel, functional safety-compliant local dimming backlight LED driver

The TLC69628-Q1 is an LED driver with

48 constant current sink channels, which can provide up to 16-bit

individual pixel-level LED PWM control. The additional 7-bit dot

correction (DC) is also implemented to each channel to control peak

current. Each device shares data stream by serial peripheral interface (SPI), which supports up to 511

devices connection. The interface is software compatible with LED drivers in the same

group which can be applied to different application

scenarios based on LED current and total LED number.

To optimize overall

systematic power efficiency, the device is equipped with adaptive

headroom voltage control (AHVC) scheme to optimize headroom voltage

across each channel and device. Only the OUT47 pin from the last

device of daisy chain is required to be programmed as FB pin to

optimize LED supply voltage from DC/DC.

The TLC69628-Q1 is equipped diagnostics

for LED, current sink, communication, and device.