JPH0321987U - - Google Patents

Description

[Brief explanation of drawings]

Fig. 1 is a configuration block diagram explaining the present invention, Fig. 2 is a circuit diagram showing an embodiment of the invention, Fig. 3 is a waveform diagram explaining the operation of the circuit in Fig. 2, and Fig. 4 is a conventional circuit diagram. FIG. 2 is an explanatory diagram of the device. 10... Main output load current detection means, 11...
... Sub output load current detection means, 20 ... Main comparison means, 21 ... Sub comparison means, 30 ... Switch arbitration means, 40 ... Main switch circuit, 41
...Subswitch circuit, 50...Dummy circuit.

Claims (1)

[Claims for Utility Model Registration] A dummy load circuit for a DC switching power supply comprising a dummy circuit commonly connected to each output of a DC power supply having a main output and a sub-output, which detects the load current of the main output. means for comparing the value detected by the main output load current detection means with a threshold value corresponding to a light load state, and outputting an operation signal if the value is lower; and an operation output by the main comparison means. a main switch circuit that connects the main output and the dummy circuit according to a signal; means for detecting the load current of the sub-output; and a value detected by the sub-output load current detecting means that corresponds to a light load state. a sub-switch circuit that connects the sub-output and the dummy circuit in accordance with the operating signal outputted by the sub-comparing means; and the main switch. A dummy load circuit for a DC switching power supply, comprising: switch arbitration means for giving priority to the operation of the main switch circuit when the operation of the circuit and the sub-switch circuit conflict;