| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a current control DC-DC converter capable of preventing a control system from affecting the peak current due to the influence of a switch of the other phase. Ž<P>SOLUTION: The current control DC-DC converter is provided with: a comparator 31 (32) for comparing a first current detection signal (second current detection signal) of current detectors 3a, 3b with a first reference current (second reference current), which is based on an error voltage of a voltage detection signal of a voltage detector 8 and a reference voltage; a pulse generator 34 for generating a pulse signal p1, whose ON time is longer than an interval between when the second current detection signal reaches a minimum value and when the second current detection signal reaches the second reference current; a pulse generator 33 for generating a pulse signal p2 whose ON time is longer than the interval between, when the first current detection signal reaches a minimum value and when the first current detection signal reaches the first reference current, the pulse signal p2 lagging behind the pulse signal p1 generated later by a half period; and a PWM circuit 36 (35) for generating a first PWM signal (second PWM signal), according to the pulse signal of the pulse generator 34 (33) and an output signal from the comparator 31 (32), thereby turning on/off a switch Tr1 (Tr2). Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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