JPS5659325A - Switching electric power source - Google Patents

Switching electric power source

Info

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
Application number
JP13570379A
Other languages
Japanese (ja)
Other versions
JPS5943908B2 (en
Inventor
Motoyoshi Fujita
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TDK Corp
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 JP54135703A priority Critical patent/JPS5943908B2/en
Publication of JPS5659325A publication Critical patent/JPS5659325A/en
Publication of JPS5943908B2 publication Critical patent/JPS5943908B2/en
Expired legal-status Critical Current

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
JP54135703A 1979-10-20 1979-10-20 switching power supply Expired JPS5943908B2 (en)

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)

Also Published As

Publication number Publication date
JPS5943908B2 (en) 1984-10-25

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