JPS57189567A - Dc/dc converter circuit - Google Patents

Dc/dc converter circuit

Info

Publication number
JPS57189567A
JPS57189567A JP7457081A JP7457081A JPS57189567A JP S57189567 A JPS57189567 A JP S57189567A JP 7457081 A JP7457081 A JP 7457081A JP 7457081 A JP7457081 A JP 7457081A JP S57189567 A JPS57189567 A JP S57189567A
Authority
JP
Japan
Prior art keywords
current
constant
increase
voltage
output 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.)
Pending
Application number
JP7457081A
Other languages
Japanese (ja)
Inventor
Masaharu Murakami
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP7457081A priority Critical patent/JPS57189567A/en
Publication of JPS57189567A publication Critical patent/JPS57189567A/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
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only

Landscapes

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

Abstract

PURPOSE:To increase the lifetime of a dry battery by supplying a driving current of a switching circuit and a driving current of a constant-voltage circuit for stabilizing the output voltage from a constant-current source. CONSTITUTION:When an input voltage VIN is lowered, an output voltage VOUT tends to become constant, and an input current will thereby increase. Thus, the collector current of a transistor Q11 is increased, the emitter current of a transistor Q12 will thus increase, and the base current Ib will increase. However, since a current Io which flows through a constant-current source 21 is constant, a zener current Iz will decrease when the base current Ib thus increases, and the operating point of a constant-voltage diode D13 is further displaced from the constant-voltage operating range. As a result, the output voltage VOUT becomes not constant and gradually becomes lower. In this manner, the lifetime of the dry battery can be increased.
JP7457081A 1981-05-18 1981-05-18 Dc/dc converter circuit Pending JPS57189567A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7457081A JPS57189567A (en) 1981-05-18 1981-05-18 Dc/dc converter circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7457081A JPS57189567A (en) 1981-05-18 1981-05-18 Dc/dc converter circuit

Publications (1)

Publication Number Publication Date
JPS57189567A true JPS57189567A (en) 1982-11-20

Family

ID=13550991

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7457081A Pending JPS57189567A (en) 1981-05-18 1981-05-18 Dc/dc converter circuit

Country Status (1)

Country Link
JP (1) JPS57189567A (en)

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