GB2015276A - Shutdown circuit for a switching power supply - Google Patents

Shutdown circuit for a switching power supply

Info

Publication number
GB2015276A
GB2015276A GB7902980A GB7902980A GB2015276A GB 2015276 A GB2015276 A GB 2015276A GB 7902980 A GB7902980 A GB 7902980A GB 7902980 A GB7902980 A GB 7902980A GB 2015276 A GB2015276 A GB 2015276A
Authority
GB
United Kingdom
Prior art keywords
supply
power supply
switching power
duty cycle
shutdown 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.)
Granted
Application number
GB7902980A
Other versions
GB2015276B (en
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.)
Motorola Solutions Inc
Original Assignee
Motorola 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 Motorola Inc filed Critical Motorola Inc
Publication of GB2015276A publication Critical patent/GB2015276A/en
Application granted granted Critical
Publication of GB2015276B publication Critical patent/GB2015276B/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
    • H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
    • 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
    • H02M3/33507—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 with automatic control of the output voltage or current, e.g. flyback converters

Landscapes

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

Abstract

In a regulated power supply in which the value of the D.C. output voltage B + is fed back to control the duty cycle of a pulse train controlling a switching circuit 24, a protective circuit 52-58 inhibits operation of the supply if the duty cycle increases to a value indicative of failure of the supply to produce a minimum desired output voltage. Operation of the supply is inhibited for a predetermined shutdown interval (54) following which the protective circuit is deactivated for a period (58) to allow the supply to attempt to establish its desired output. The power supply includes a master oscillator (20) and the protective circuitry (50) inhibits operation of the supply when the D.C. output from the oscillator (20) falls below a preset limit. <IMAGE>
GB7902980A 1978-02-27 1979-01-29 Shutdown circuit for a switching power supply Expired GB2015276B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US88130978A 1978-02-27 1978-02-27

Publications (2)

Publication Number Publication Date
GB2015276A true GB2015276A (en) 1979-09-05
GB2015276B GB2015276B (en) 1983-02-02

Family

ID=25378216

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7902980A Expired GB2015276B (en) 1978-02-27 1979-01-29 Shutdown circuit for a switching power supply

Country Status (6)

Country Link
JP (1) JPS54124214A (en)
AU (1) AU529798B2 (en)
CA (1) CA1127711A (en)
DE (1) DE2907183A1 (en)
GB (1) GB2015276B (en)
NL (1) NL7901560A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2316556A (en) * 1996-08-19 1998-02-25 Thomson Multimedia Sa Power supply with protection arrangement
GB2331414A (en) * 1997-11-12 1999-05-19 Bosch Gmbh Robert Monitoring a current-regulating stage

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56125962A (en) * 1980-03-10 1981-10-02 Canon Inc Power source voltage detector
JPS60150107A (en) * 1984-11-19 1985-08-07 Canon Inc Warning device
JPH02223377A (en) * 1989-02-22 1990-09-05 Fanuc Ltd Protective circuit for primary switching regulator control circuit
US6307356B1 (en) * 1998-06-18 2001-10-23 Linear Technology Corporation Voltage mode feedback burst mode circuit
JP2008312335A (en) * 2007-06-14 2008-12-25 Mitsumi Electric Co Ltd Switching power supply device and primary-side control circuit
JP5449431B2 (en) * 2012-03-09 2014-03-19 三菱電機株式会社 Inverter device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2416985C3 (en) * 1974-04-08 1979-12-06 Siemens Ag, 1000 Berlin Und 8000 Muenchen Arrangement for fast current limitation
JPS5444180U (en) * 1977-09-02 1979-03-27

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2316556A (en) * 1996-08-19 1998-02-25 Thomson Multimedia Sa Power supply with protection arrangement
GB2331414A (en) * 1997-11-12 1999-05-19 Bosch Gmbh Robert Monitoring a current-regulating stage
GB2331414B (en) * 1997-11-12 2000-05-10 Bosch Gmbh Robert Method of and monitoring means for monitoring a current- regulating stage

Also Published As

Publication number Publication date
NL7901560A (en) 1979-08-29
DE2907183A1 (en) 1979-09-06
JPS6212743B2 (en) 1987-03-20
CA1127711A (en) 1982-07-13
AU529798B2 (en) 1983-06-23
JPS54124214A (en) 1979-09-27
GB2015276B (en) 1983-02-02
AU4443279A (en) 1979-09-06

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee
728C Application made for restoration (sect. 28/1977)
728R Application refused (sect. 28/1977)