TPS929121AQPWPRQ1

The TPS929121AQPWPRQ1 from Texas Instruments is a 12-channel, 40V high-side LED driver designed for automotive applications requiring advanced LED control. It utilizes the FlexWire control interface, which is based on an industrial-standard CAN physical layer, enabling long-distance off-board communication without impacting EMC.

This LED driver provides 12 channels of precision high-side current output, with a supply voltage range of 4.5 V to 40 V. Each channel can deliver up to 75 mA of current, set by an external resistor. The device features 2-bit global and 6-bit independent current setting, along with high current accuracy of less than ±5% for currents between 5 mA and 75 mA, and less than ±10% at 1 mA. It supports 12-bit independent PWM dimming with programmable frequencies up to 20 kHz, and offers both linear and exponential dimming methods.

Diagnostic and protection features are integrated, including programmable fail-safe states, LED open-circuit detection, LED short-circuit detection, and single-LED short-circuit diagnostics. It also includes programmable low-supply detection, an open-drain ERR output for fault indication, and watchdog and CRC for the FlexWire interface. An 8-bit ADC is available for pin voltage measurement, and overtemperature protection is included. The device is AEC-Q100 qualified for automotive applications, with a temperature grade of 1 (–40°C to +125°C).

The TPS929121AQPWPRQ1 is supplied in a 24-HTSSOP package and is suitable for surface mounting. Its applications include automotive exterior rear lights, headlights, interior ambient lighting, and cluster displays.