Switching power supply

Details Switching power supply Switching power supply

2000-01-27

2000-08-29

Riley, Shawn

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

H02M 3335

Patent

active

061117633

ABSTRACT:
A switching power supply capable of executing output voltage stabilizing control with a high degree of reliability even when the DC output voltage is at DC 2V or lower. A DC--DC converter unit 1 converts a DC input voltage Vin to DC through switching and outputs a DC output voltage Vo for a load 10 through output lines 71 and 72. An auxiliary power unit 3, which is electrically linked to the DC--DC converter unit 1, outputs a DC voltage Va through an auxiliary source output line 30 having a potential that is negative relative to the potential at the lower-potential output line 72. An output voltage detection unit 2, connected between the higher-potential output line 71 and the auxiliary source output line 30, detects a DC voltage (Vo+Va) manifesting between them and provides the detection signal to a control unit 4 via a photocoupler 9. The control unit 4 implements output voltage stabilizing control on the DC--DC converter unit 1.

REFERENCES:
patent: 5995387 (1999-11-01), Takahashi et al.

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