TITPS92512DGQR
Overview
The TPS92512DGQR is a step-down (buck) LED driver IC with an integrated 200-mOhm high-side MOSFET capable of delivering up to 2.5A of output current. It operates across a wide input voltage range of 4.5V to 42V and supports high-frequency switching up to 2MHz for compact design footprints. This regulator is specifically designed to provide high-accuracy constant current for high-brightness LED strings using PWM dimming control.
Why Choose This Part
It offers 5 percent current accuracy for consistent light output across different units and temperature ranges. The integration of the power MOSFET and a 2MHz switching frequency allows for the use of small external inductors and capacitors, reducing the overall PCB area. Safety features include overcurrent protection, overtemperature protection, and adjustable undervoltage lockout to ensure system longevity.
Applications
Key Specifications
Getting Started
Designers can evaluate this part using the TPS92512EVM evaluation module to test PWM dimming performance and thermal characteristics. Reference the datasheet for proper layout of the HVSSOP-10 PowerPAD to ensure adequate heat dissipation at the full 2.5A load. Calculate the external sense resistor based on the desired LED current and verify that the inductor saturation current exceeds the peak switch current limit.
