Current-controlled DC-DC converter control circuit,...

Details Current-controlled DC-DC converter control circuit,... Current-controlled DC-DC converter control circuit,...

2006-06-07

2010-02-16

Tso, Edward (Department: 2858)

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

C323S271000, C323S282000

Reexamination Certificate

active

07663356

ABSTRACT:
The invention includes a flip-flop circuit that controls a main switching element of a DC-DC converter by switching and an oscillation circuit that is connected to a set terminal of the flip-flop circuit and outputs an oscillation signal that gradually increases and decreases in oscillation frequency in accordance with an increase and decrease in output voltage value of the DC-DC converter when the DC-DC converter is in a transition state between a stop state and a steady operation state. In a process that the output voltage gradually rises and gradually falls, the oscillation frequency of the oscillation signal gradually rises and gradually falls, a time interval at which the main switching element is set into a conductive state is extended. No excess electric power is supplied to the output voltage, and the output voltage can be made to have a smooth ramp waveform.

REFERENCES:
patent: 4238708 (1980-12-01), Kaneda
patent: 7122995 (2006-10-01), Hasegawa et al.
patent: 7250745 (2007-07-01), Yasukouchi et al.
patent: 2006/0238182 (2006-10-01), Yoshino
patent: 2007/0090818 (2007-04-01), Nishimori
patent: 2007/0139023 (2007-06-01), Hasegawa
patent: 9-154275 (1997-06-01), None

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