JPS5558777A - Inversion chopper type dc-dc converter - Google Patents
Inversion chopper type dc-dc converterInfo
- Publication number
- JPS5558777A JPS5558777A JP13180778A JP13180778A JPS5558777A JP S5558777 A JPS5558777 A JP S5558777A JP 13180778 A JP13180778 A JP 13180778A JP 13180778 A JP13180778 A JP 13180778A JP S5558777 A JPS5558777 A JP S5558777A
- Authority
- JP
- Japan
- Prior art keywords
- switch
- diode
- time
- circuit
- capacitor
- 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
Links
Landscapes
- Dc-Dc Converters (AREA)
Abstract
PURPOSE: To simplify a circuit and reduce its cost, by using a general-purpose arithmetic amplifier and integrating an oscillator with a pulse width control circuit.
CONSTITUTION: A general-purpose operational amplifier OPA is provided and an oscillator is integrated with a pulse width control circuit so that a switch control section SWC is formed. In the switch control section, a capacitor C2 is charged through a diode D3 and discharged through another diode D4. The output signal of the switch control section SWC is repeatedly raised and lowered to turn the switch SW on and off. When the output signal is low, the time of closing of the switch SW is equal to the time constant of the capacitor C2, the diode D4 and a resistor r4 and fixed. When the output signal is high, the time of opening of the switch SW depends on the time constant of a parallel circuit comprising the capacitor C2, the diode D3, a resistor r3 and a transistor Tr. The current of the transistor is controlled to regulate the time of opening of the switch SW. A cheap device of a simple circuit is thus obtained.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13180778A JPS5558777A (en) | 1978-10-26 | 1978-10-26 | Inversion chopper type dc-dc converter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13180778A JPS5558777A (en) | 1978-10-26 | 1978-10-26 | Inversion chopper type dc-dc converter |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5558777A true JPS5558777A (en) | 1980-05-01 |
Family
ID=15066560
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13180778A Pending JPS5558777A (en) | 1978-10-26 | 1978-10-26 | Inversion chopper type dc-dc converter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5558777A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58501354A (en) * | 1981-08-27 | 1983-08-11 | モトロ−ラ・インコ−ポレ−テツド | Inductive load driver protection circuit with minimum power loss |
EP0855789A2 (en) * | 1997-01-25 | 1998-07-29 | Robert Bosch Gmbh | Timer in a circuit for converting a direct voltage into another direct voltage |
-
1978
- 1978-10-26 JP JP13180778A patent/JPS5558777A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58501354A (en) * | 1981-08-27 | 1983-08-11 | モトロ−ラ・インコ−ポレ−テツド | Inductive load driver protection circuit with minimum power loss |
EP0855789A2 (en) * | 1997-01-25 | 1998-07-29 | Robert Bosch Gmbh | Timer in a circuit for converting a direct voltage into another direct voltage |
EP0855789A3 (en) * | 1997-01-25 | 1999-10-13 | Robert Bosch Gmbh | Timer in a circuit for converting a direct voltage into another direct voltage |
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