JPS5579680A - Driving circuit for combined-switch - Google Patents
Driving circuit for combined-switchInfo
- Publication number
- JPS5579680A JPS5579680A JP15402578A JP15402578A JPS5579680A JP S5579680 A JPS5579680 A JP S5579680A JP 15402578 A JP15402578 A JP 15402578A JP 15402578 A JP15402578 A JP 15402578A JP S5579680 A JPS5579680 A JP S5579680A
- Authority
- JP
- Japan
- Prior art keywords
- transistor
- primary
- transformer
- coupled
- 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
Links
Landscapes
- Dc-Dc Converters (AREA)
Abstract
PURPOSE: To reduce the storage effect of the primary switching transistor and to enable the reduction in the capacity of an auxiliary power source, by changing the base current of the primary switching transistor between two or more levels synchronously with the closing of the secondary switching transistor.
CONSTITUTION: The secondary winding of a pulse transformer T2 is connected to the base and emitter of the primary transistor Q1. Pulses are supplied to the primary winding of the transformer T2 from a pulse width control circuit 1 through a resistor R1. A current IR2 is supplied from the primary winding of the transformer T2 to another pulse width control circuit 6 through another resistor R1. Both the ends of the secondary winding T1S2 of another transformer T1 are connected to the input terminals of a rectification circuit 4. The positive output terminal of the rectification circuit 4 is coupled to the collector of the secondary transistor Q2. The negative output terminal of the rectification circuit 4 is coupled to the negative input terminal of a smoothing circuit 5. The emitter of the secondary transistor Q2 is coupled to the positive input terminal of the smoothing circuit 5. This results in reducing the storage effect of the primary transistor Q1 and enabling the reduction in the capacity of an auxiliary power source.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15402578A JPS5918948B2 (en) | 1978-12-13 | 1978-12-13 | Composite switching drive circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15402578A JPS5918948B2 (en) | 1978-12-13 | 1978-12-13 | Composite switching drive circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5579680A true JPS5579680A (en) | 1980-06-16 |
JPS5918948B2 JPS5918948B2 (en) | 1984-05-01 |
Family
ID=15575252
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15402578A Expired JPS5918948B2 (en) | 1978-12-13 | 1978-12-13 | Composite switching drive circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5918948B2 (en) |
-
1978
- 1978-12-13 JP JP15402578A patent/JPS5918948B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS5918948B2 (en) | 1984-05-01 |
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