JPS5739429A - Regulated power supply - Google Patents

Regulated power supply

Info

Publication number
JPS5739429A
JPS5739429A JP11173280A JP11173280A JPS5739429A JP S5739429 A JPS5739429 A JP S5739429A JP 11173280 A JP11173280 A JP 11173280A JP 11173280 A JP11173280 A JP 11173280A JP S5739429 A JPS5739429 A JP S5739429A
Authority
JP
Japan
Prior art keywords
current
switching transistor
load
case
base
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
Application number
JP11173280A
Other languages
Japanese (ja)
Inventor
Chikayuki Okamoto
Isao Fukushima
Yoshinori Okada
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP11173280A priority Critical patent/JPS5739429A/en
Publication of JPS5739429A publication Critical patent/JPS5739429A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)

Abstract

PURPOSE:To reduce unnecessary power consumption in case of a steady load, and also to supply stable electric power in case of overload, too, by controlling a base current of a switching transistor in accordance with a load current. CONSTITUTION:A load current signal detected by a microresistance 22 for detecting a load current is shifted to DC by a level shifter 23, and after that, is amplified suitably by an amplifier 24, and by this output signal, a base current controlling circuit 21 controls a base current of a switching transistor 2. For instance, in case when a current flowing to a load 11 is a little, a signal detected by the microresistance 22 and amplified by the amplifier 24 is small, and the base current of the switching transistor 2 is small. In case when a load current has been increased, a current to be supplied to the base of the switching transistor 2 is also increased by its increased portion, and it is always operated in a saturation area of the switching transistor 2.
JP11173280A 1980-08-15 1980-08-15 Regulated power supply Pending JPS5739429A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11173280A JPS5739429A (en) 1980-08-15 1980-08-15 Regulated power supply

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11173280A JPS5739429A (en) 1980-08-15 1980-08-15 Regulated power supply

Publications (1)

Publication Number Publication Date
JPS5739429A true JPS5739429A (en) 1982-03-04

Family

ID=14568769

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11173280A Pending JPS5739429A (en) 1980-08-15 1980-08-15 Regulated power supply

Country Status (1)

Country Link
JP (1) JPS5739429A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60108194U (en) * 1983-12-23 1985-07-23 日本ケミコン株式会社 Power supply overcurrent protection circuit
JPH03124774U (en) * 1990-03-28 1991-12-17

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60108194U (en) * 1983-12-23 1985-07-23 日本ケミコン株式会社 Power supply overcurrent protection circuit
JPH03124774U (en) * 1990-03-28 1991-12-17

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