coffeefet
Newbie level 4
Hi,
Why do all the datasheet and app note schematics of high power offline flybacks with FSCQ1565 cotroller show no primary clamp whatsoever?
They only show a small Drain source capacitor, which they call the "resonant capacitor".
(which is true but it hardly seems big enough to quench leakage spiking for cases of overload, etc)
The internal FET is only 650V rated.
FSCQ1565 datasheet (pg 19 schem)
App note for FSCQ1565 (AN4146) (pg 19 schem)
Why do all the datasheet and app note schematics of high power offline flybacks with FSCQ1565 cotroller show no primary clamp whatsoever?
They only show a small Drain source capacitor, which they call the "resonant capacitor".
(which is true but it hardly seems big enough to quench leakage spiking for cases of overload, etc)
The internal FET is only 650V rated.
FSCQ1565 datasheet (pg 19 schem)
App note for FSCQ1565 (AN4146) (pg 19 schem)
onsemi
www.onsemi.com