Texas Instruments TPS92620-Q1 Automotive LED Driver

Texas Instruments TPS92620-Q1 Automotive LED Driver is a two-channel driver with a unique thermal management design to reduce temperature rise. Automotive batteries directly power the TPS92620-Q1 linear driver with significant voltage variations to output full current loads up to 250mA per channel. External shunt resistors are leveraged to share output current and dissipate power out of the driver. The device's full-diagnostic capabilities include LED open, LED short-to-GND circuit, and device overtemperature protection.

The TI TPS92620-Q1 Automotive LED Driver offers a one-fails-all-fail feature that functions with other LED drivers, such as the TPS9261x-Q1, TPS9262x-Q1, TPS9263x-Q1, and TPS92830-Q1 devices, to manage different requirements.

Features

AEC-Q100 qualified for automotive applications:
- Temperature grade 1 of –40°C to +125°C, T_A
Wide input voltage range of 4.5V to 40V
Thermal sharing by an external shunt resistor
Low supply current in fault mode
Two high-precision current regulations:
- Up to 250mA current output for each channel
- ±5% accuracy over a full temperature range
- Independent current setting by resistor
- Independent PWM pin for brightness control

Low dropout voltage:
- Maximum dropout of 600mV for 250mA
Diagnostics and protection
- LED open-circuit with auto-recovery
- LED short-to-GND with auto-recovery
- Diagnostic enabled with adjustable threshold
- Fault bus configurable as either one-fails–all-fail or only-failed-channel off (N-1)
- Thermal shutdown
Operation junction temperature range of –40°C to +150°C

Applications

Automotive exterior rear light
- Rear lamp
- Center high-mounted stop lamp
- Side marker
Automotive exterior small light
- Door handle
- Blind spot detection indicator
- Charging inlet