Switching regulator provided with error amplifier circuit having

Details Switching regulator provided with error amplifier circuit having Switching regulator provided with error amplifier circuit having

1979-08-30

1981-04-21

Pellinen, A. D.

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

363 80, H02M 3335

Patent

active

042636434

ABSTRACT:
A switching regulator in which a DC input voltage is chopped by an oscillator applied to a transformer the output of which in turn is rectified by a rectifier circuit; a DC voltage derived from the rectifier is compared with a reference voltage so that a voltage is produced which corresponds to the deviation from said reference voltage of the aforementioned DC voltage derived from the rectifier; the voltage thus produced is amplified by means of an error amplifier; a current proportional to the transformer driving current provided by the oscillator is detected by a current detector; and the output of the error amplifier is compared with the output of the current detector so that only when the former exceeds the latter, a trigger signal is applied to the oscillator, whereby the oscillation of the oscillator is changed from an ON state to an OFF state. In such a switching regulator, there is provided circuitry for limiting the operation range of the aforementioned error amplifier by the difference between a voltage proportional to said DC voltage derived from the rectifier and a voltage proportional to the input voltage.

REFERENCES:
patent: 4013935 (1977-03-01), Siepmann et al.
patent: 4021717 (1977-05-01), Furuishi et al.
patent: 4030024 (1977-06-01), Chambers et al.

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