Texas Instruments TPS92520-Q1 | Demoboard TIDA-050030

Description

This reference design details a headlight ECU using an interleaved boost in voltage regulation mode feeding four synchronous buck channels. This design is also capable of matrix headlight control and is mounted to a heatsink and enclosure to emulate an automotive headlight ECU. The TPS92682-Q1 is setup as a two phase interleaved boost controller set in voltage regulation mode capable of 130W output power. The boost output drives two TPS92520-Q1 dual channel synchronous buck drivers for a total of four buck channels at 120W total output. The design is mounted to a heatsink and enclosed to emulate an automotive headlight ECU. A MSP432 processor controls the TPS92682-Q1 and the two TPS92520-Q1 devices by the SPI interface. The MSP432 communicates to the master via CAN and also communicates to the lighting matrix module using UART communications via a CAN transceiver. Several bench-test results are available for this design including efficiency data, thermal measurements, pixel-controlled load data, and EMC measurements according to the CISPR 25 Class 5 conducted specification.

Features

• Interleaved voltage output boost using one TPS92682
• Four synchronous-buck channels capable of pixelcontrolled loads using two TPS92520s
• Supports dynamic loads, matrix controllers for LED pixel control
• Buck channels capable for 1.5A maximum, 55W limited to a total of 120W
• 9 V to 24 V full power operating range, power derate down to 6V inputs
• Fully enclosed headlight ECU example CISPR 25 Class 5 conducted test data from 0.15 to 108 MHz.
• Reverse battery protection circuit included in this reference design

Typical applications

• Dynamic and static headlights / Rear light

More information

• Datasheet