JPS5659325A - Switching electric power source - Google Patents
Switching electric power sourceInfo
- Publication number
- JPS5659325A JPS5659325A JP13570379A JP13570379A JPS5659325A JP S5659325 A JPS5659325 A JP S5659325A JP 13570379 A JP13570379 A JP 13570379A JP 13570379 A JP13570379 A JP 13570379A JP S5659325 A JPS5659325 A JP S5659325A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- output
- transistor
- power source
- electric power
- 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
Abstract
PURPOSE: To make it possible to execute not only the stable operation by high supply voltage but also the output control, by forming the structure so that two switching circuits can be connected in series to the supply voltage.
CONSTITUTION: Each blocking oscillator 1, 2 uses in common the primary winding L1 of the transformer T1, and also has the feedback windings Lf1, Lf2 coupled with the primary winding L1, respectively. When switching the primary side of the oscillation transformer T1, voltage is induced to the secondary winding L2, its voltage is rectified and smoothed by the diode D5 and the capacitor C3, and it is output as DC output voltage E0. In this case, the base of the transistor Q2 is controlled through the Zener diode ZD1 by obtaining DC negative voltage Ec proportional to the voltage E0 by the control circuit 3. Namely, for instance, when load has become light, the duty ratio is changed by applying negative bias to the transistor Q2 and heightening the oscillation frequency, so that the control can be stabilized.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54135703A JPS5943908B2 (en) | 1979-10-20 | 1979-10-20 | switching power supply |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54135703A JPS5943908B2 (en) | 1979-10-20 | 1979-10-20 | switching power supply |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5659325A true JPS5659325A (en) | 1981-05-22 |
JPS5943908B2 JPS5943908B2 (en) | 1984-10-25 |
Family
ID=15157910
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP54135703A Expired JPS5943908B2 (en) | 1979-10-20 | 1979-10-20 | switching power supply |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5943908B2 (en) |
-
1979
- 1979-10-20 JP JP54135703A patent/JPS5943908B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS5943908B2 (en) | 1984-10-25 |
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