MP6005 Flyback application

DC-DC Power Converters
1

Hello, I would like to use MP6005 as flyback converter with following specs:

  • Input 48V
  • Output 42V, 1.5A max

I would like to use it as SSR flyback, also using MP26085 CCCV controller as SSR feedback (charger application).
My questions are:

  1. Is it doable in term of power (not sure what the maximum output power is for MP6005)

  2. there is no typical example for SSR flyback. Is it correct to leave SYNC opened (no active feedback)

  3. What is the difference between MP6005 and MP6005A. Is it only the package/power?

Thank you

2

Hello,

Is it doable in term of power (not sure what the maximum output power is for MP6005)

Yes, the MP6005 can handle designs for this much power, however the majority of the power will go through your selected components. Make sure your transformer selection accounts for your inductance, windings, leakage current and thermal requirements. Please refer to the sourcing/ sinking gate characteristics on the data sheet while selecting your MOSFET. They will need to be compatible with your selected MOSFET and your design intent (efficiency, slew rate).

Is it correct to leave SYNC opened (no active feedback)

In SSR mode, the SYNC driver is recommended for active-clamped forward topologies since it can provide higher efficiency. However, for an SSR flyback, having it float is fine. There is more information about how to implement SSR in the pin function and application information parts of the data sheet, and in the evaluation board file.

What is the difference between MP6005 and MP6005A. Is it only the package/power?

MP6005A and the MP6005 are from the same family of parts. The main difference is their switching frequencies.
MP6005A: fsw= 450kHz
MP6005: fsw= 250kHz

Feel free to reach out if you have more questions.

Thank you,
Eliza