JPS5663618A - Voltage drooping control circuit - Google Patents

Voltage drooping control circuit

Info

Publication number
JPS5663618A
JPS5663618A JP13844279A JP13844279A JPS5663618A JP S5663618 A JPS5663618 A JP S5663618A JP 13844279 A JP13844279 A JP 13844279A JP 13844279 A JP13844279 A JP 13844279A JP S5663618 A JPS5663618 A JP S5663618A
Authority
JP
Japan
Prior art keywords
voltage
electric power
power supply
switching element
detection circuit
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.)
Granted
Application number
JP13844279A
Other languages
Japanese (ja)
Other versions
JPS5926185B2 (en
Inventor
Mitsutake Sato
Yoshikatsu Saito
Michio Kono
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 JP13844279A priority Critical patent/JPS5926185B2/en
Publication of JPS5663618A publication Critical patent/JPS5663618A/en
Publication of JPS5926185B2 publication Critical patent/JPS5926185B2/en
Expired legal-status Critical Current

Links

Abstract

PURPOSE: To keep the electric power constant and prevent overload of the switching element, etc. at the time of drooping of the output voltage, even if the DC input voltage is varied, by superposing and applying the voltage being proportional to the voltage of the DC electric power supply, to the current detection circuit which detects an input current.
CONSTITUTION: An input current supplied to the primary side of the transformer T is detected by the current detection circuit consisting of the resistances R1WR3, the capacitor C3, etc., when it exceeds the set point, the output voltage is drooped by the control circuit CONT, at the time of short-circuit of the load RL or its approximate state, the DC electric power supply DC, the switching element, the transformer T, the diode D, etc. are protected, the voltage which is proportional to the voltage of the DC electric power supply DC is superposed and applied to the current detection circuit through the resistance 8, etc., and as a result, the electric power at the time of drooping of the output voltage is kept constant even if the voltage of the DC electric power supply DC is varied, and overload of the switching element, etc. can be prevented.
COPYRIGHT: (C)1981,JPO&Japio
JP13844279A 1979-10-26 1979-10-26 Voltage droop control circuit Expired JPS5926185B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13844279A JPS5926185B2 (en) 1979-10-26 1979-10-26 Voltage droop control circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13844279A JPS5926185B2 (en) 1979-10-26 1979-10-26 Voltage droop control circuit

Publications (2)

Publication Number Publication Date
JPS5663618A true JPS5663618A (en) 1981-05-30
JPS5926185B2 JPS5926185B2 (en) 1984-06-25

Family

ID=15222082

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13844279A Expired JPS5926185B2 (en) 1979-10-26 1979-10-26 Voltage droop control circuit

Country Status (1)

Country Link
JP (1) JPS5926185B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58170362A (en) * 1982-03-29 1983-10-06 Koden Electronics Co Ltd Protective device for switching power source
JPS60160084U (en) * 1984-03-30 1985-10-24 日本電気ホームエレクトロニクス株式会社 switching regulator
US4761812A (en) * 1985-12-10 1988-08-02 U.S. Holding Company, Inc. Constant power telephone line circuit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58170362A (en) * 1982-03-29 1983-10-06 Koden Electronics Co Ltd Protective device for switching power source
JPS60160084U (en) * 1984-03-30 1985-10-24 日本電気ホームエレクトロニクス株式会社 switching regulator
JPH0246232Y2 (en) * 1984-03-30 1990-12-06
US4761812A (en) * 1985-12-10 1988-08-02 U.S. Holding Company, Inc. Constant power telephone line circuit

Also Published As

Publication number Publication date
JPS5926185B2 (en) 1984-06-25

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