1 Description

This user's guide describes the specifications, board connection description, characteristics, operation, and use of the TPS92520-Q1, dual 1.6-A synchronous buck LED driver evaluation module (EVM). The TPS92520-Q1 device implements an adaptive on-time average current mode control and is designed to be compatible with shunt FET dimming techniques and LED matrix manager-based dynamic beam headlamps. The adaptive on-time control provides near constant switching frequency that can be set between 100 kHz and 2.2 MHz. Inductor current sensing and closed-loop feedback enables better than ±4% accuracy over wide input voltage, output voltage and ambient temperature range.

Additional features include wide input voltage range (4.5 V to 65 V), programmable switching frequency, programmable analog and PWM dimming techniques, 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. An onboard 10-bit ADC samples critical input parameters required for system health monitoring and diagnostics. Complete schematic diagrams, printed circuit board layouts, and bill of materials are included in this document.