UCC28C43: 400Vdc to 24Vout/6-8A

Hi Brian,

The UCC28C43 is a high-performance, current-mode PWM controller IC suitable for flyback converters. For a 400Vdc to 24Vout/6-8A flyback solution, I've found a few reference designs that might be relevant:

1. TIDA-00773: This reference design from Texas Instruments is a 400Vdc to 24Vout/5A flyback converter using the UCC28780 controller. Although it's not exactly 6-8A, it's close, and the design can be modified to accommodate the higher current.
2. SLUA726: This application note from Texas Instruments provides a design example for a 400Vdc to 24Vout/10A flyback converter using the UCC28C43 controller. While it's rated for 10A, the design can be scaled down to 6-8A.
3. TIDA-01004: This reference design is a 400Vdc to 24Vout/8A flyback converter using the UCC28780 controller. It's a good match for the customer's requirements, and the design can be easily adapted to use the UCC28C43 controller.

To give you a better idea, here's a brief summary of the TIDA-01004 design:

• Input voltage: 400Vdc
• Output voltage: 24Vdc
• Output current: 8A
• Switching frequency: 100kHz
• Transformer: Planar transformer with a turns ratio of 10:1
• Controller: UCC28780 (can be replaced with UCC28C43)
• MOSFET: Infineon IRF640NPbF (can be replaced with a similar MOSFET)

Keep in mind that these reference designs are just a starting point, and the customer will need to modify and optimize the design to suit their specific requirements.

Best,

Pratik A.