Texas Instruments TPS925302-Q1 Synchronous Buck LED Driver
Texas Instruments TPS925302-Q1 Synchronous Buck LED Driver is a monolithic, 2-channel, constant-current, and constant-voltage synchronous buck LED driver. This LED driver operates over a programmable 100kHz to 1.2MHz switching frequency range, 4.5V to 65V input voltage range, and up to 2A continuous output current. The TPS925302-Q1 LED driver incorporates adaptive on-time average-current mode control and is designed to generate constant-voltage or constant-current output. The device includes advanced SPI programmable diagnostic and fault protection, featuring cycle-by-cycle switch current limit, bootstrap undervoltage, LED open, LED short, thermal warning, and thermal shutdown. The TPS925302-Q1 devices are AEC-Q100 qualified for automotive applications. This LED driver is ideal for automotive headlight and adaptive LED driving modules.
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 C5
- Functional safety-compliant:
- Developed for functional safety applications
- Documentation available to aid ISO 26262 system design up to ASIL B
- 4.5V to 65V wide input voltage range
- Configurable constant voltage and constant current operation:
- Up to 2A continuous output current
- 4% regulation accuracy (voltage and current mode)
- Adaptive on-time average current control
- 100kHz to 1.2MHz programmable switching frequency range
- Advanced dimming operation:
- 10-bit precision analog dimming
- 10-bit precision internal PWM dimming
- Supports external PWM dimming input
- Optimized for external shunt dimming, including LED matrix manager
- Cycle-by-cycle switch overcurrent protection
- Switch thermal protection
- Serial Peripheral Interface (SPI):
- Configurable analog reference, switching frequency, and PWM dimming duty cycle
- Fault monitoring and reporting
- Limp-Home (LH) and standalone mode operation
Applications
- Automotive headlight
- Adaptive LED driving modules
Simplified Schematic
