1 Features

• AEC-Q100 qualified for automotive applications

– Grade 1: –40°C to 125°C ambient operating

temperature

– Device HBM classification level H1C

– Device CDM classification level C4B

• Targeted Functional Safety-Compliant

– Developed for functional safety applications

– Documentation available to aid ISO 26262

system design up to ASIL B

• 48 integrated current sinks

– Programmable 16-bit PWM / Hybrid dimming

– Programmable 7-bit analog dot correction (DC)

– Maximum output current / voltage: 100mA / 16V

• Integrated 33MHz oscillator

– 16-bit PWM output in 500Hz

– >20KHz refresh rate with enhanced spectrum

(ES) PWM

• High speed communication

– Serial peripheral interface (SPI)

– Data rates up to 17Mbps

• Power efficiency optimization

– Adaptive headroom voltage control (AHVC)

– Device power save mode (PSM)

• EMI mitigation

– Interface: programmable buffer driving

capability

– Current sinks: phase shifting / spread spectrum

• Protection and Diagnostic

– LED: open / short detection / health check

– Current sink: adjacent-pin short / health check

– Interface: CRC / command error / time-out

error / communication watchdog

– Device: under voltage / ISET out of range /

thermal shutdown / memory CRC / OTP CRC /

OSC watchdog

2 Applications

• Automotive Central Information Display

• Automotive Cluster Display

• Automotive Head-up Display

3 Description

The TLC69638-Q1 is a LED driver with 48 constant

current sink channels which could 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 TLC69638-Q1 is equipped diagnostics for LED,

current sink, communication and device.