JPS5688516A - Control circuit for voltage droop of multiple-output constant-voltage power source - Google Patents

Control circuit for voltage droop of multiple-output constant-voltage power source

Info

Publication number
JPS5688516A
JPS5688516A JP16658379A JP16658379A JPS5688516A JP S5688516 A JPS5688516 A JP S5688516A JP 16658379 A JP16658379 A JP 16658379A JP 16658379 A JP16658379 A JP 16658379A JP S5688516 A JPS5688516 A JP S5688516A
Authority
JP
Japan
Prior art keywords
voltage
output
loads
power source
reference voltage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP16658379A
Other languages
Japanese (ja)
Inventor
Mitsutake Sato
Michio Kono
Yoshikatsu Saito
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP16658379A priority Critical patent/JPS5688516A/en
Publication of JPS5688516A publication Critical patent/JPS5688516A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To attain miniaturization and econimization by using a comparison amplifier in common, by respectively detecting and inputting electric currents, supplied to loads, to the comparison amplifier via OR circuits and then by comparing them with a reference voltage.
CONSTITUTION: A direct current is switched by converter CONV to apply desired constant DC voltages to loads, connected to output terminals OUT1 and OUT2 via transformer T and diodes D1 and D2. Load currents are detected by current detection parts SN1 and SN2, whose detection outputs are passed through OR circuits of diodes D3 and D4 and inputted to comparison amplifier AP, where they are compared with the reference voltage of reference power source VR. If amplifier AP finds one current detection output higher than the reference voltage, the output is applied to converter CONV via isolator IR to droop the output voltage. Therefore, if at least one of loads is short-circuited and an overcurrent is supplied, the output voltage is drooped to suppress the overcurrent, protecting CONV, photodiodes D1 and D2, etc.
COPYRIGHT: (C)1981,JPO&Japio
JP16658379A 1979-12-21 1979-12-21 Control circuit for voltage droop of multiple-output constant-voltage power source Pending JPS5688516A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16658379A JPS5688516A (en) 1979-12-21 1979-12-21 Control circuit for voltage droop of multiple-output constant-voltage power source

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16658379A JPS5688516A (en) 1979-12-21 1979-12-21 Control circuit for voltage droop of multiple-output constant-voltage power source

Publications (1)

Publication Number Publication Date
JPS5688516A true JPS5688516A (en) 1981-07-18

Family

ID=15833959

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16658379A Pending JPS5688516A (en) 1979-12-21 1979-12-21 Control circuit for voltage droop of multiple-output constant-voltage power source

Country Status (1)

Country Link
JP (1) JPS5688516A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6274494U (en) * 1985-10-29 1987-05-13
JPS62244274A (en) * 1986-04-17 1987-10-24 Matsushita Electric Ind Co Ltd Power unit
JPH0217860A (en) * 1988-07-06 1990-01-22 Sony Corp Switching power supply device
US7643264B2 (en) 2004-05-28 2010-01-05 Sony Corporation Power supply controller and method for controlling power supply circuit

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6274494U (en) * 1985-10-29 1987-05-13
JPS62244274A (en) * 1986-04-17 1987-10-24 Matsushita Electric Ind Co Ltd Power unit
JPH0578275B2 (en) * 1986-04-17 1993-10-28 Matsushita Electric Ind Co Ltd
JPH0217860A (en) * 1988-07-06 1990-01-22 Sony Corp Switching power supply device
US7643264B2 (en) 2004-05-28 2010-01-05 Sony Corporation Power supply controller and method for controlling power supply circuit

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