The 100Khz Multiple Output Switching Power Supply Circuit Diagram uses two VN4000A 400-V MOSPOWER FETs in a
half-bridge power switch configuration. Outputs available are + 5 Vat
20 A and ±15 V (or ±12 V) at 1 A. Since linear three-terminal
regulators are used for the low-current outputs, either ±12 V or ±15 V
can be made available with a simple change in the transformer secondary
windings.
A TU94 switching regulator IC proVides pulse-width
modulation control and drive signals for the power supply. The upper
MOSPOWER FET, Q7. in the power switch stage is driven by a simple
transformer drive circuit. The lower MOS. Q6, since it is ground referenced. is directly driven from the control !C.
100Khz Multiple Output Switching Power Supply Circuit Diagram
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