High-stability multi-output DC isolation power supply

Abstract

The utility model discloses a kind of high-stability multi-output direct current isolation power supplies, including interface CN1, main control module, transformer T1 and at least one rectification filtering module;Main control module includes control chip U1, control chip U1 has VCC end, SW end, COMP end, FB end and CS end;Transformer T1 has primary winding, auxiliary winding, at least one first secondary winding and at least one second secondary winding, the number of turns of each first secondary winding is different from that of a second secondary winding;Interface CN1 is connected with the VCC end of primary winding and control chip U1 respectively, the SW end of control chip U1 is connected with primary winding;COMP end is connected with auxiliary winding and ground terminal respectively, and CS end is grounded;FB end is connected with auxiliary winding;Auxiliary winding is also connected with VCC end;Rectification filtering module includes first rectification filtering unit and second rectification filtering unit;First rectification filtering unit is connected to first secondary winding, and second rectification filtering unit is connected to second secondary winding.

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