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LM5160: External Sync

Part Number: LM5160
Other Parts Discussed in Thread: LMV431

I am currently employing multiple LM5160's in a product in inverting FlyBuck mode to give seven isolated power supplies.  I would like to tie them together with external sync (possibly multiple phases) to reduce noise.  Is this possible? Are there examples?

Also in play: the effect switchable output voltages have on the compensation network.

Current system specs:

INPUT:  +24v Inverting Isolated 

OUTPUT 1-6: +9v 1000ma, +12v 750ma, +15v 600ma, +18v 500ma  (switch selected LMV431/optocoupler controlled) x 6

OUTPUT 7: +18v 150ma, -18v 150ma fixed voltage using inverting flybuck.