Semiconductor device for controlling switching power supply

Details Semiconductor device for controlling switching power supply Semiconductor device for controlling switching power supply

2007-04-24

2007-04-24

Callahan, Timothy P. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Current driver

C327S110000, C323S285000

Reexamination Certificate

active

11089331

ABSTRACT:
In a semiconductor device for controlling switching power supply of this invention, having a switching element and switching operation control circuit, after receiving a current detection signal when switching is turned off, a fixed delay time is applied to the current detection signal by a delay circuit so that switching turn-on control by a transformer reset pulse signal obtained based on a signal from the tertiary windings of the transformer is not accepted within a blanking time corresponding to the delay time. Thus, the switching by the switching element is halted.

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