JPS5586378A - Switching device for power supply - Google Patents

Switching device for power supply

Info

Publication number
JPS5586378A
JPS5586378A JP16426278A JP16426278A JPS5586378A JP S5586378 A JPS5586378 A JP S5586378A JP 16426278 A JP16426278 A JP 16426278A JP 16426278 A JP16426278 A JP 16426278A JP S5586378 A JPS5586378 A JP S5586378A
Authority
JP
Japan
Prior art keywords
base
transistor
current
circuit
voltage
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
JP16426278A
Other languages
Japanese (ja)
Other versions
JPS5840917B2 (en
Inventor
Masanori Ishii
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.)
Toko Inc
Original Assignee
Toko Inc
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 Toko Inc filed Critical Toko Inc
Priority to JP16426278A priority Critical patent/JPS5840917B2/en
Publication of JPS5586378A publication Critical patent/JPS5586378A/en
Publication of JPS5840917B2 publication Critical patent/JPS5840917B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Dc-Dc Converters (AREA)

Abstract

PURPOSE: To obtain a stable output voltage independently of the fluctuation in an input, a load or the like, by providing a constant current circuit for controlling the base current of a switching transistor, in a base driving circuit for the transistor which constitutes an oscillation circuit.
CONSTITUTION: When an input voltage V1 fluctuates, a voltage induced in the feedback winding L3 of a transformer T changes. As a result, the base voltage V3 and base current I3 of a switching transistor Q1 vary. Since a constant current circuit CC is contained in a base driving circuit, the base current I3 can be controlled almost constant even if the base current varies during the closing of the switching transistor. Therefore, the transistor can be driven without supplying an excessive base current to the base of the transistor. This results in holding the base driving power down and improving the power supply efficiency.
COPYRIGHT: (C)1980,JPO&Japio
JP16426278A 1978-12-22 1978-12-22 switching power supply Expired JPS5840917B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16426278A JPS5840917B2 (en) 1978-12-22 1978-12-22 switching power supply

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16426278A JPS5840917B2 (en) 1978-12-22 1978-12-22 switching power supply

Publications (2)

Publication Number Publication Date
JPS5586378A true JPS5586378A (en) 1980-06-30
JPS5840917B2 JPS5840917B2 (en) 1983-09-08

Family

ID=15789738

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16426278A Expired JPS5840917B2 (en) 1978-12-22 1978-12-22 switching power supply

Country Status (1)

Country Link
JP (1) JPS5840917B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS592570A (en) * 1982-06-25 1984-01-09 Sanyo Electric Co Ltd Switching control type power source circuit
JPS6077292U (en) * 1983-10-31 1985-05-30 北陸電気工業株式会社 DC-DC converter
JPS61153085U (en) * 1985-03-13 1986-09-22
JPH06222765A (en) * 1993-12-28 1994-08-12 Yamaha Corp Electronic musical instrument

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS592570A (en) * 1982-06-25 1984-01-09 Sanyo Electric Co Ltd Switching control type power source circuit
JPH028550B2 (en) * 1982-06-25 1990-02-26 Sanyo Electric Co
JPS6077292U (en) * 1983-10-31 1985-05-30 北陸電気工業株式会社 DC-DC converter
JPH0127428Y2 (en) * 1983-10-31 1989-08-16
JPS61153085U (en) * 1985-03-13 1986-09-22
JPH06222765A (en) * 1993-12-28 1994-08-12 Yamaha Corp Electronic musical instrument

Also Published As

Publication number Publication date
JPS5840917B2 (en) 1983-09-08

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