| 摘要 |
PROBLEM TO BE SOLVED: To solve a conventional problem of large loss occurring in a resistor for detecting current, which was essential for an output voltage switching circuit used hitherto, if load current increases. SOLUTION: The output voltage switching circuit includes a circuit of detecting the level of an output signal of small power and a microcomputer circuit of controlling. it. Output voltage can be switched with a signal from a microcomputer, thus eliminating a resistor for current detection and a current detection circuit.
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