公开(公告)号：US20040183380A1

公开(公告)日：2004-09-23

申请号：US10791921

申请日：2004-03-03

Applicant: Toko, Inc.

Inventor： Tetsushi Otake

IPC: H02J001/00

CPC classification number: H05B33/0815 ,  H02J1/04 ,  H02M1/36 ,  H02M3/3374 ,  H02M2001/0019 ,  Y10T307/707

Abstract: Disclosed is a switching constant-current power supply system, comprising a feedback circuit 7 provided between a detector circuit 5 for generating a first feedback signal in proportion to a current flowing in a load 6, and a control circuit 4 for driving a first power converter circuit 3 which is provided on the input side of a second power converter circuit 10 to stabilize the load current. The feedback circuit 7 includes a signal hold section 8 for generating a second feedback signal. The feedback circuit 7 is operable to supply the first feedback signal to the control circuit 4 in a current supply period, and to supply the second feedback signal to the control circuit 4 in a current cutoff period. The second feedback signal has a signal value approximately equal to that of the first feedback signal appearing in the current supply period. The switching constant-current power supply system can stabilize the load current even under the condition that the load is repeatedly turned on/off.

Abstract translation: 公开了一种开关恒流电源系统，包括设置在检测电路5之间的反馈电路7，用于产生与在负载6中流动的电流成比例的第一反馈信号;以及控制电路4，用于驱动第一电力转换器 电路3，其设置在第二功率转换器电路10的输入侧，以稳定负载电流。 反馈电路7包括用于产生第二反馈信号的信号保持部分8。 反馈电路7可操作以在电流供应周期中将第一反馈信号提供给控制电路4，并且在当前截止周期内将第二反馈信号提供给控制电路4。 第二反馈信号具有与当前电源周期中出现的第一反馈信号的信号值近似相等的信号值。 即使在反复打开/关闭负载的条件下，开关恒流电源系统也能稳定负载电流。