JPS54144922A - Control system for switching power - Google Patents
Control system for switching powerInfo
- 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
- comparator
- resistor
- transistor
- fed
- switching element
- 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
Links
Landscapes
- Dc-Dc Converters (AREA)
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
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5232078A JPS54144922A (en) | 1978-05-02 | 1978-05-02 | Control system for switching power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5232078A JPS54144922A (en) | 1978-05-02 | 1978-05-02 | Control system for switching power |
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 |
|---|---|---|---|
| JP5232078A Granted JPS54144922A (en) | 1978-05-02 | 1978-05-02 | Control system for switching power |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS54144922A (en) |
Cited By (7)
| 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 |
-
1978
- 1978-05-02 JP JP5232078A patent/JPS54144922A/en active Granted
Cited By (9)
| 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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