| 摘要 |
PURPOSE:To contrive miniaturization of the entire power supply and reduction in cost of production for the same by a method wherein the auxiliary power source circuit of a plurality of output-side power source circuits is formed common. CONSTITUTION:Power is supplied to an error amplifying circuit 9 by a DC output, and said output is insulatively applied to a control circuit 8 through the intermediary of a photocoupler 10. Also, each output-side power supply part is constituted in such a manner that it is commonly used with the auxiliary power source circuit 3. In this multioutput power supply, the output of an alternate current power source 1 is converted to a DC current by performing rectification and smoothing using an input rectification and smoothing circuit 2, a high frequency interrupted voltage is formed by switching said DC current using a switching circuit 4, and after the above current has been transformed by a switching transformer 5, the same is used as a DC output by rectifying and smoothing again using an output voltage rectification and smoothing circuit 6. Power is supplied to the control circuit 8 using the commonly-used auxiliary power source circuit 3, and performs a switching control over a switching circuit 4. |
