SWITCHING APPARATUS FOR IMPLEMENTING MULTI-OUTPUT POWER SUPPLY

摘要

A switching apparatus for implementing a multi-output power supply is provided to improve the reliability of a power unit and a whole system by satisfying a high reliability at low cost. A switching apparatus for implementing a multi-output power supply includes a separation switching unit. The separation switching unit is connected to a second side circuit of an SMPS(Switching Mode Power Supply) having a first side and a second side of a transformer. The separation switching unit switches a positive voltage induced from the first side of the transformer to the second side of the transformer without a PWMIC(Power Management Integrated Chip). The separation switching unit includes a first unit, a second unit, and a third unit. The first unit rectifies and smoothes the positive voltage generated from the second side of the transformer of the SMPS. The second unit switches the output voltage generated from the first unit and transmits the comparison value to the first unit. The third unit enables the second side of the transformer to generate a positive voltage as an output voltage if the comparison value transmitted from the second unit is smaller than the wanted output voltage. The third unit enables the second side of the transformer not to generate the positive voltage as an output voltage if the comparison value is larger than the wanted output voltage.