INSULATED POWER SOURCE DEVICE AND LIGHTING DEVICE

WIPO Patent Application WO/2012/070512

A1

The problem addressed by the present invention is to cause an insulated power source device provided with an error amplifier at the secondary side to be able to reduce the time from starting up a power source voltage until a feedback voltage reaches a target value. The present invention has: a control circuit that generates and outputs a control signal of a switching element that controls the current that flows through the primary side of a power conversion means (transformer) in response to a feedback signal; a detection means that detects output voltage or output current; a feedback voltage generation circuit that generates feedback voltage in response to the detection signal from the detection means; and a signal transfer means that transfers the feedback signal generated by the feedback voltage generation circuit to the control circuit. The feedback voltage generation circuit is provided with: an error amplification circuit that outputs a voltage in response to the potential difference between the output signal and a predetermined baseline voltage; and a buffer amplifier that impedance converts and outputs the output of the error amplification circuit. An offset imparting means that imparts an offset to the output voltage of the buffer amp is provided between the output terminal of the buffer amp and an inverting input terminal.

KADO MINORU (JP)
ARIMA SATOSHI (JP)

PCT/JP2011/076752

May 31, 2012

November 21, 2011

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MITSUMI ELECTRIC CO LTD (JP)
KADO MINORU (JP)
ARIMA SATOSHI (JP)

H02M3/28; H05B37/02

JPH0714693A	1995-01-17
JPH03276168A	1991-12-06

ARAFUNE, Hiroshi et al. (JP)
Hiroshi Arafune (JP)

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