UC3827-2

• Product introduction

The controller's UC3827 series provides an integrated control solution for cascaded buck and push-pull converters. Known as incumbent Fed or voltage Fed push-pull converters, these converters are ideal for multiple output and/or high voltage output applications. In both Fed current Fed and voltage mode, the push-pull switch is driven at 50% rated duty cycle and half the switching frequency of the buck stage. In the current Fed mode, two switches specify the time of the drive, in the circle, to prevent ringing and voltage stress on the device. Fed in voltage mode, driven between two switches, the switch specifies an interval of time to prevent short circuits across the transformer and capacitor from energy storage, prohibiting the flow of current through these devices.

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