emontllo
Full Member level 4
Hello,
I would like to operate a flyback converter at a wide rectified voltage range (from 50 Vdc to 380 Vdc). My design is currently based on the ST VIPER17L.
Is there any way to reduce the start-up voltage of a VIPER? Although the Brown out protection can be deactivated and the flyback can effectively work at 50 Vdc rectified voltage, it is not possible to start the driver at low voltage.
I have already tested the flyback with a start-up voltage of 100 Vdc and then reduced the bus voltage to 50 Vdc it and it does work perfectly.
Any recommendation, external power-up circuit, or suggestion would be greatly appreciated.
I would like to operate a flyback converter at a wide rectified voltage range (from 50 Vdc to 380 Vdc). My design is currently based on the ST VIPER17L.
Is there any way to reduce the start-up voltage of a VIPER? Although the Brown out protection can be deactivated and the flyback can effectively work at 50 Vdc rectified voltage, it is not possible to start the driver at low voltage.
I have already tested the flyback with a start-up voltage of 100 Vdc and then reduced the bus voltage to 50 Vdc it and it does work perfectly.
Any recommendation, external power-up circuit, or suggestion would be greatly appreciated.