Description:

In automotive instrument clusters and other safety-critical LED driver applications, the demand for multi-channel LED performance is increasing to ensure consistent LED brightness and color temperature. System-level safety considerations require detection of various fault conditions, which adds to system complexity. The TLC6C5712-Q1 device is a 12-channel constant-current sink LED driver. With 8-bit dot correction and high-accuracy output current, the TLC6C5712-Q1 device is an ideal solution for correcting LED brightness and color temperature variations. The device provides advanced protection and diagnostic features per channel to enhance system-level robustness and simplify safety-oriented designs. Six PWM inputs with programmable mapping support multiple LED color dimming configurations and offer a high dimming ratio. The 16-bit Serial Peripheral Interface (SPI) with diagnostic features supports daisy-chaining of multiple devices and simplifies system-level design.

Features:

• Qualified for automotive applications

• AEC-Q100 qualified:

– Device temperature Grade 1: Ambient operating temperature range of –40°C to 125°C

– Device HBM ESD classification level H3A

– Device CDM ESD classification level C4B

• 12 power DMOS transistor output channels

– Maximum constant current up to 75mA, programmable via external resistor

– Maximum output voltage up to 7V

– Maximum dropout voltage:

– 0.75V/channel at 50mA

– 1.2V/channel at 75mA

• Excellent output constant-current accuracy:

– Channel-to-channel variation: < ±3% (max)

– Device-to-device variation: < ±3% (max)

– 8-bit, 256-step linear dot correction per channel

• Supports flexible external PWM dimming

– 6 PWM inputs with frequency monitoring

– Programmable channel mapping via SPI

• Protection and diagnostics

– Adjacent pin short detection

– Open-load, short-to-ground, and LED short detection in both active and inactive states

– Thermal warning and thermal shutdown

– Open-drain error reporting

– LED weak-supply diagnostics

– Reference resistor open/short detection and protection

– Content protection via SPI register locking

– Forced error for SPI integrity diagnostics

• Small thermally efficient 28-pin HTSSOP PowerPAD™ package

Applications:

• Instrument cluster tell-tale indicators

• Panel and button backlighting

• Bar-graph LEDs

• Transmission PRNDL gear indicators

• Sequential turn indicators