cupoftea
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Hi,
We are doing a 70W, 100kHz Phase shift Full Bridge for 180-265VAC input.
Current doubler output.
24V, 3A output
(Parallel 3 output diodes)x2 as synch rects not worth it for 3A.
So why isn't anybody else doing this?
Pri FETs will be 4 x DPAK (+ turn off snubber for Bottom FETs)
Transformer nice easy wind, only the pri and sec coils and no split sec.
So this is easy, and we wont even need any heatsinks, even though it will be in
totally enclosed plastic with no fan.
So why isn't anybody else doing this?, I mean, no heatsinks, easy transformer wind.
Design is no more difficult than a "plain Full Bridge"
We will only get ZVS turn on at above 70% of max power but that's fine.
We don't want an extra "leakage inductor" as it just means diodes to the rail also needed
and also more dissipation in the output snubbers.
We are doing a 70W, 100kHz Phase shift Full Bridge for 180-265VAC input.
Current doubler output.
24V, 3A output
(Parallel 3 output diodes)x2 as synch rects not worth it for 3A.
So why isn't anybody else doing this?
Pri FETs will be 4 x DPAK (+ turn off snubber for Bottom FETs)
Transformer nice easy wind, only the pri and sec coils and no split sec.
So this is easy, and we wont even need any heatsinks, even though it will be in
totally enclosed plastic with no fan.
So why isn't anybody else doing this?, I mean, no heatsinks, easy transformer wind.
Design is no more difficult than a "plain Full Bridge"
We will only get ZVS turn on at above 70% of max power but that's fine.
We don't want an extra "leakage inductor" as it just means diodes to the rail also needed
and also more dissipation in the output snubbers.