GB1456383A - Dc power supply circuits - Google Patents

Dc power supply circuits

Info

Publication number
GB1456383A
GB1456383A GB1273373A GB1273373A GB1456383A GB 1456383 A GB1456383 A GB 1456383A GB 1273373 A GB1273373 A GB 1273373A GB 1273373 A GB1273373 A GB 1273373A GB 1456383 A GB1456383 A GB 1456383A
Authority
GB
United Kingdom
Prior art keywords
circuit
base
current
voltage
march
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.)
Expired
Application number
GB1273373A
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.)
Philips Components Ltd
Original Assignee
Mullard 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 Mullard Ltd filed Critical Mullard Ltd
Priority to GB1273373A priority Critical patent/GB1456383A/en
Publication of GB1456383A publication Critical patent/GB1456383A/en
Expired 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
    • H02M3/338—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 in a self-oscillating arrangement
    • H02M3/3385—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 in a self-oscillating arrangement with automatic control of output voltage or current

Landscapes

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

Abstract

1456383 DC - DC converters MULLARD Ltd 18 March 1974 [16 March 1973] 12733/73 Heading H2F [Also in Division H3] A D.C.-D.C. converter comprises a transistor TR2 arranged to switch current into the primary L6 of a transformer T3 and having feedback from a current transformer T2 to the base, a resistor Rs being included in the base circuit, the voltage drop across Rs being arranged to turn off transistor TR2 when the current in the main path reaches a predetermined value. As described, operation is initiated by a starting circuit (not shown) which turns on TR2. The base and collector currents build up until the voltage across Rs reaches the triggering voltage of a threshold sensing device TSD e.g. a Schmitt trigger, which cuts off TR2. The energy stored in T3 is then rectified at D1 and supplies a load RL. The circuit then remains quiescent until a further input is supplied by a feedback circuit F/B which controls the frequency in dependence on the required output power. For constant load the frequency is constant over a range of input voltages. An auxiliary winding may be included in T2 or T3 for starting.
GB1273373A 1973-03-16 1973-03-16 Dc power supply circuits Expired GB1456383A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1273373A GB1456383A (en) 1973-03-16 1973-03-16 Dc power supply circuits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1273373A GB1456383A (en) 1973-03-16 1973-03-16 Dc power supply circuits

Publications (1)

Publication Number Publication Date
GB1456383A true GB1456383A (en) 1976-11-24

Family

ID=10010103

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1273373A Expired GB1456383A (en) 1973-03-16 1973-03-16 Dc power supply circuits

Country Status (1)

Country Link
GB (1) GB1456383A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2499783A1 (en) * 1981-02-10 1982-08-13 Thomson Csf Power control circuit for DC supply - includes transistor cutting current periodically to primary of transformer with winding to base, led and phototransistor providing feedback
FR2502418A1 (en) * 1981-03-20 1982-09-24 Thomson Brandt Gmbh CUT-OUT POWER SUPPLY FOR ELECTRONIC DEVICES
EP0124210A1 (en) * 1983-04-27 1984-11-07 Astec Components Ltd. Current driven flyback power supply
GB2188498A (en) * 1986-03-14 1987-09-30 Mitsubishi Electric Corp Self oscillating dc-ac-dc converter

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2499783A1 (en) * 1981-02-10 1982-08-13 Thomson Csf Power control circuit for DC supply - includes transistor cutting current periodically to primary of transformer with winding to base, led and phototransistor providing feedback
FR2502418A1 (en) * 1981-03-20 1982-09-24 Thomson Brandt Gmbh CUT-OUT POWER SUPPLY FOR ELECTRONIC DEVICES
EP0124210A1 (en) * 1983-04-27 1984-11-07 Astec Components Ltd. Current driven flyback power supply
US4608625A (en) * 1983-04-27 1986-08-26 Astec Components, Ltd. Current driven flyback power supply
GB2188498A (en) * 1986-03-14 1987-09-30 Mitsubishi Electric Corp Self oscillating dc-ac-dc converter
US4745535A (en) * 1986-03-14 1988-05-17 Mitsubishi Denki Kabushiki Kaisha Ringing choke type DC/DC converter
GB2188498B (en) * 1986-03-14 1990-07-25 Mitsubishi Electric Corp Blocking oscillator type converter

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee