| 摘要 |
In the present invention, according to a time from when a switching element 2 is turned on to when the switching element 2 reaches a set overcurrent detection level, an on time correction circuit 15 changes a time from when the switching element 2 reaches the overcurrent detection level to when the switching element 2 is turned off. Thus it is possible to keep constant the peak value of drain current passing through the switching element 2, regardless of an input voltage Vin.
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