3W non-isolated bias power supply reference design with 80% efficiency and 15dB EMI performance margin

TIDA-00940 is a 3W non-isolated bias power supply with up to 80% efficiency and excellent EMI performance, designed for motor control and drive subsystems in major appliances, saving system costs and having other features described here Main advantages. This reference design uses a buck topology to provide two non-isolated outputs, implemented using TI's UCC28881 and TPS5405 controllers, to provide comprehensive protection. The hardware is designed and tested to comply with EN-55014 Class B requirements for household appliances.

characteristic

• ● Non-isolated buck topology design with limited external components for AC/DC stages, saving BOM cost
• ● Excellent EMI performance, compliant with EN-55014 Class B requirements with 15dB margin (conducted emissions)
• ● Provide reliable start-up for high load capacitance applications
• ● No external cooling required. Environmental operation up to 85°C
• ● Supports 700V self-powered startup, no auxiliary bias winding required