JPS56114436A - Power transistor driving circuit - Google Patents

Power transistor driving circuit

Info

Publication number
JPS56114436A
JPS56114436A JP1688580A JP1688580A JPS56114436A JP S56114436 A JPS56114436 A JP S56114436A JP 1688580 A JP1688580 A JP 1688580A JP 1688580 A JP1688580 A JP 1688580A JP S56114436 A JPS56114436 A JP S56114436A
Authority
JP
Japan
Prior art keywords
power transistor
collector
input
emitter voltage
driving circuit
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
JP1688580A
Other languages
Japanese (ja)
Inventor
Tamotsu Yasuda
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.)
Toyota Industries Corp
Original Assignee
Toyoda Automatic Loom Works 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 Toyoda Automatic Loom Works Ltd filed Critical Toyoda Automatic Loom Works Ltd
Priority to JP1688580A priority Critical patent/JPS56114436A/en
Publication of JPS56114436A publication Critical patent/JPS56114436A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
    • H03K17/082—Modifications for protecting switching circuit against overcurrent or overvoltage by feedback from the output to the control circuit
    • H03K17/0826—Modifications for protecting switching circuit against overcurrent or overvoltage by feedback from the output to the control circuit in bipolar transistor switches

Abstract

PURPOSE:To prevent a power transistor from being damaged, by controlling the supply of a base current in accordance with the collector-emitter voltage in a state that the power transistor is on. CONSTITUTION:When an on signal SG5 is input to the flip-flop 15, an output of the operational amplifier 19 is raised, a base current flows into the power transistor 1, and it is made to conduct. And, when a collector current IC increases, the collector-emitter voltage VCE increases, as well, and the base current IB is increased in order to increase a noninversional input of the operational amplifier 19. When the collector-emitter voltage VCE has reached a prescribed value, an off signal SG6 is input to the flip-flop 15, and the power transistor 1 is made off.
JP1688580A 1980-02-13 1980-02-13 Power transistor driving circuit Pending JPS56114436A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1688580A JPS56114436A (en) 1980-02-13 1980-02-13 Power transistor driving circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1688580A JPS56114436A (en) 1980-02-13 1980-02-13 Power transistor driving circuit

Publications (1)

Publication Number Publication Date
JPS56114436A true JPS56114436A (en) 1981-09-09

Family

ID=11928617

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1688580A Pending JPS56114436A (en) 1980-02-13 1980-02-13 Power transistor driving circuit

Country Status (1)

Country Link
JP (1) JPS56114436A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5467626A (en) * 1977-11-09 1979-05-31 Hitachi Ltd Base current controller for power transistor
JPS54131857A (en) * 1978-04-04 1979-10-13 Toshiba Corp Transistor dc switching device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5467626A (en) * 1977-11-09 1979-05-31 Hitachi Ltd Base current controller for power transistor
JPS54131857A (en) * 1978-04-04 1979-10-13 Toshiba Corp Transistor dc switching device

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