JPS6460221A - Power-supply device - Google Patents

Power-supply device

Info

Publication number
JPS6460221A
JPS6460221A JP21287687A JP21287687A JPS6460221A JP S6460221 A JPS6460221 A JP S6460221A JP 21287687 A JP21287687 A JP 21287687A JP 21287687 A JP21287687 A JP 21287687A JP S6460221 A JPS6460221 A JP S6460221A
Authority
JP
Japan
Prior art keywords
circuit
excess current
contrived
power
control element
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
JP21287687A
Other languages
Japanese (ja)
Inventor
Tomoichirou Oota
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.)
Canon Inc
Original Assignee
Canon 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 Canon Inc filed Critical Canon Inc
Priority to JP21287687A priority Critical patent/JPS6460221A/en
Publication of JPS6460221A publication Critical patent/JPS6460221A/en
Pending legal-status Critical Current

Links

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  • Emergency Protection Circuit Devices (AREA)

Abstract

PURPOSE:To reduce the power loss of a circuit and reduce voltage drop, by taking the input signal of an excess current protective-circuit for protecting a circuit element, out of a space between the input terminal and output terminal of a control element inserted into a feeding route. CONSTITUTION:Into a feeder route between a circuit element (load) 7 and a power source 3, a control element Q1 is inserted, and feed power is contrived to be controlled. Besides, an excess current protective-circuit consisting of transistors Q3, Q4, and the like is set, and the circuit element 7 is contrived to be protected from excess current. In its case, the input signal of the excess current protective-circuit is contrived to be taken out of a space between the input terminal and output terminal of the control element Q1. As a result, an excess current detecting series resistance element and the like are not needed, and so power loss and voltage drop can be reduced.
JP21287687A 1987-08-28 1987-08-28 Power-supply device Pending JPS6460221A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21287687A JPS6460221A (en) 1987-08-28 1987-08-28 Power-supply device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21287687A JPS6460221A (en) 1987-08-28 1987-08-28 Power-supply device

Publications (1)

Publication Number Publication Date
JPS6460221A true JPS6460221A (en) 1989-03-07

Family

ID=16629726

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21287687A Pending JPS6460221A (en) 1987-08-28 1987-08-28 Power-supply device

Country Status (1)

Country Link
JP (1) JPS6460221A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5578314A (en) * 1978-12-08 1980-06-12 Matsushita Electric Ind Co Ltd Regulated power source unit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5578314A (en) * 1978-12-08 1980-06-12 Matsushita Electric Ind Co Ltd Regulated power source unit

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