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Constant current control power supply, constant current control method, and the constant-current control device
Constant current control power supply, constant current control method, and the constant-current control device
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机译：恒流控制电源，恒流控制方法及恒流控制装置
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摘要
PROBLEM TO BE SOLVED: To suppress abrupt variation of the average output current in a constant current control power supply which performs PWM control, a constant current control method, and a constant current control device.SOLUTION: A constant current control power supply 1 which outputs constant current has: a switch element Q; a control circuit 120 which controls the switch element Q to control constant current; and a control section 10 which outputs a PWM signal to the control circuit 120. The control circuit 120 controls the switch element Q in the average current mode in accordance with the current flowed into the switch element Q and controls the switch element Q by PWM control in accordance with the PWM signal. The control section 10 decreases frequency of the PWM signal when a duty ratio of the PWM signal is changed from 100% and when the duty ratio of the PWM signal is changed to be 100%.
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