TIDUF84 June 2024
A 1-phase, 230VAC RMS input is connected to the reference design PCB. The UCC28810 based fly-back converter on TIDA-010951 uses the rectified AC to generate an isolated 24V rail for powering the BLDC motor driver, MCF8315C-Q1. MCF8315C-Q1 generates a 5V (VBK) from an integrated buck converter and 3.3V (AVDD) from an integrated LDO. AVDD powers the MSPM0L1306 which is used to receive the speed command over Infrared (IR) and send the command to MCF8315C-Q1 over I2C. MSPM0L1306 can also be used for monitoring the status of the BLDC fan operation using I2C communication. VBK is used to power the IR received TSOP32238