Full Bridge driver with UCC28C43

[zenerbjt]

Hi,
We wish to use UCC28C43 to drive a Full Bridge.
The attached shows it in LTspice.
Can you think of a more lower-component-count way of doing this?

 

[FvM]

To reduce component count, you'll use a dedicated push pull controller IC.

 

[BradtheRad]

I suppose my schematic has a similar parts count. Same as your schematic mine has a D flip-flop performing clock-divide-by-2 (it's the easiest way I've seen to derive twin interleaved pulses). Duty cycle can be varied by a single adjustment to the incoming pulse train.

 

[zenerbjt]

To reduce component count, you'll use a dedicated push pull controller IC.

Thanks, there are very few of these with a 1Volt Current sense pin which is good for CST connection.

It amazes me how few suitable push pull controllers exist for this.....there is LTC3723, but current sense threshold is very low and its very expensive.

 

[KlausST]

Hi,

neither your schematic nor your description tells that you want current sense features.
Why now a different requirement?

Klaus

 

[zenerbjt]

The attached is the best so far, any improvements?
Full Bridge drivers are surprisingly hard to find with the versatility of the UCC28C43.

LTspice sim and pdf schem attached

 

[BradtheRad]

The attached is the best so far, any improvements?

You may observe in your simulation how a transformer (inductor) wants to continue conducting current when it's abruptly shut off. It may result in spikes, or even reverse current flow.
You may need to add a snubber network, or modify gating waveforms, try soft switching, etc.