JPS54144922A - Control system for switching power - Google Patents

Control system for switching power

Info

Publication number
JPS54144922A
JPS54144922A JP5232078A JP5232078A JPS54144922A JP S54144922 A JPS54144922 A JP S54144922A JP 5232078 A JP5232078 A JP 5232078A JP 5232078 A JP5232078 A JP 5232078A JP S54144922 A JPS54144922 A JP S54144922A
Authority
JP
Japan
Prior art keywords
voltage
control
current
switching
comparator
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
JP5232078A
Other languages
Japanese (ja)
Other versions
JPS6148346B2 (en
Inventor
Motoyoshi Fujita
Original Assignee
Tdk Corp
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 Tdk Corp filed Critical Tdk Corp
Priority to JP53052320A priority Critical patent/JPS6148346B2/ja
Publication of JPS54144922A publication Critical patent/JPS54144922A/en
Publication of JPS6148346B2 publication Critical patent/JPS6148346B2/ja
Expired legal-status Critical Current

Links

Abstract

PURPOSE: To prevent a switching element from damage caused by an output short- circuit fault and/or capacitive load, by such manner with the switching element turned on when a current in the inductor is decreased to a level of the first set value and turned off when reaching the second set value.
CONSTITUTION: A control circuit 10, in which a generated voltage in a resistor 3 is compared with the reference voltage by a first comparator 12 and fed to the reset input of a flip flop 15, and a generated voltage in a resistor 6 at the output side is compared with the reference voltage by a second comparator 13 and fed to the set input of the flip flop 15 through an AND gate 14, controls a transistor 2 through a drive 11. Accordingly, the control of on-off time of the transistor 2, made by detecting both of the primary and secondary current of a transformer 1, can prevent an increase of the collector current due to a short-circuit and overload, thus capable of improving a reliability.
COPYRIGHT: (C)1979,JPO&Japio
JP53052320A 1978-05-02 1978-05-02 Expired JPS6148346B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53052320A JPS6148346B2 (en) 1978-05-02 1978-05-02

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53052320A JPS6148346B2 (en) 1978-05-02 1978-05-02

Publications (2)

Publication Number Publication Date
JPS54144922A true JPS54144922A (en) 1979-11-12
JPS6148346B2 JPS6148346B2 (en) 1986-10-23

Family

ID=12911490

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53052320A Expired JPS6148346B2 (en) 1978-05-02 1978-05-02

Country Status (1)

Country Link
JP (1) JPS6148346B2 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57145532A (en) * 1981-02-28 1982-09-08 Japan Radio Co Ltd Dc voltage charging circuit kmujkkojpower source waste preventing device in power source circuit
US4931707A (en) * 1989-08-14 1990-06-05 General Motors Corporation Impedance matching circuit
JP2002333653A (en) * 2001-05-08 2002-11-22 Canon Inc Light emitting device and camera
WO2006104195A1 (en) * 2005-03-29 2006-10-05 Panasonic Photo & Lighting Co., Ltd. Charging device
US7292005B2 (en) 2001-08-03 2007-11-06 Linear Technology Corp. Capacitor charging circuitry and methodology implementing controlled on and off time switching
US7342365B2 (en) 2006-02-09 2008-03-11 Linear Technology Corp. Systems and methods for reducing input current in photoflash chargers
JP2010514407A (en) * 2006-12-19 2010-04-30 アレグロ・マイクロシステムズ・インコーポレーテッド Capacitor charging method and apparatus

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57145532A (en) * 1981-02-28 1982-09-08 Japan Radio Co Ltd Dc voltage charging circuit kmujkkojpower source waste preventing device in power source circuit
US4931707A (en) * 1989-08-14 1990-06-05 General Motors Corporation Impedance matching circuit
JP2002333653A (en) * 2001-05-08 2002-11-22 Canon Inc Light emitting device and camera
US7292005B2 (en) 2001-08-03 2007-11-06 Linear Technology Corp. Capacitor charging circuitry and methodology implementing controlled on and off time switching
WO2006104195A1 (en) * 2005-03-29 2006-10-05 Panasonic Photo & Lighting Co., Ltd. Charging device
JP2006276315A (en) * 2005-03-29 2006-10-12 Panasonic Photo & Lighting Co Ltd Stroboscopic device
US7812571B2 (en) 2005-03-29 2010-10-12 Panasonic Photo & Lighting Co., Ltd. Charging device
US7342365B2 (en) 2006-02-09 2008-03-11 Linear Technology Corp. Systems and methods for reducing input current in photoflash chargers
JP2010514407A (en) * 2006-12-19 2010-04-30 アレグロ・マイクロシステムズ・インコーポレーテッド Capacitor charging method and apparatus

Also Published As

Publication number Publication date
JPS6148346B2 (en) 1986-10-23

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