UCC28630: 40V to 400V rms input, ~50W total output Flyback with multiple outputs of 24V and 16V.

Mustafa Gulec

Intellectual 540 points

Part Number: UCC28630
Other Parts Discussed in Thread: UCC28700

Is UCC28630 appropriate for this wide input operation?

over 5 years ago

0 Mike O' over 5 years ago

TI__Guru* 86266 points

Hello,

I found a reference design using the UCC28700 for a 25V to 500V input range with 28V output. This is a 10 W design. This could be used up to a 60 W design by changing the transformer.

The UCC28630 uses a similar control law and it may be possible to get this device to work in this application as well.

Regards,

Mike

0 Mustafa Gulec over 5 years ago in reply to Mike O'

Intellectual 540 points

UCC28630 has narrower overvoltage - undervoltage band. I mean; UCC28630 UVLO thresholds on/off (V) 14.5/8 , while ucc28700's is 21/8V. So I believe it can't go that far. I think current controllers are better option.

0 Mike O' over 5 years ago in reply to Mustafa Gulec

TI__Guru* 86266 points

Hello,

The UVLO is for trickle charge startup. The reference design I sent worked down to 25 V. If you want to do the design with the UCC28630. They have a similar control law.

Regards,

0 Mustafa Gulec over 5 years ago in reply to Mike O'

Intellectual 540 points

Thanks, I'll try but I wonder why webench is limited to 85VAC minimum input?

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UCC28630: 40V to 400V rms input, ~50W total output Flyback with multiple outputs of 24V and 16V.