This application note introduces the design of an 80 W 3-phase auxiliary power supply for motor drives and welding applications based on the L6565 and ESBT® STC04IE170HV.
The document details the design of a highly efficient 80 W, 3-phase flyback converter intended for use in motor drive and welding systems. It utilizes the STMicroelectronics L6565 PWM controller and the ESBT® STCO4IE170HV main switch to handle high DC input voltages up to 1000 VDC.
| Maximum output power | 80 W |
|---|---|
| Minimum input voltage | 250 V |
| Maximum input voltage | 850 V |
| Output voltage | 24 V / 3.33 A |
| Auxiliary output voltage | 15 V / 0.1A |
| Minimum switching frequency | 50 kHz |
The document explains the design of an 80 W 3-phase auxiliary power supply for motor drives and welding applications.
The design uses the L6565 PWM controller as the driver and the STCO4IE170HV as the main switch.
The design supports a high DC input voltage, with the input range extending up to 850 VDC.