TLC69637-Q1中文资料Automotive, 48-channel, 100mA, local dimming backlight LED driver数据手册TI规格书

描述 Description

The TLC69637-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 TLC69637-Q1 is equipped diagnostics for LED, current sink, communication and device.

特性 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



Functional Safety-Capable

Documentation available to aid functional safety system design



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

Device: under voltage / ISET out of range / thermal shutdown