JPH02111257A - Dc-dc converter - Google Patents

Dc-dc converter

Info

Publication number
JPH02111257A
JPH02111257A JP26455888A JP26455888A JPH02111257A JP H02111257 A JPH02111257 A JP H02111257A JP 26455888 A JP26455888 A JP 26455888A JP 26455888 A JP26455888 A JP 26455888A JP H02111257 A JPH02111257 A JP H02111257A
Authority
JP
Japan
Prior art keywords
pulse width
level
driving pulses
error amplifier
ocp
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
JP26455888A
Other languages
Japanese (ja)
Other versions
JPH0556111B2 (en
Inventor
Yukio Okada
Akira Okamura
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.)
Sanyo Electric Co Ltd
Original Assignee
Sanyo 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 Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP26455888A priority Critical patent/JPH0556111B2/ja
Publication of JPH02111257A publication Critical patent/JPH02111257A/en
Publication of JPH0556111B2 publication Critical patent/JPH0556111B2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

PURPOSE: To lower output currents at the time of the protection of overcurrents, and to realize a DC-DC converter having foldback current limiting characteristics by fluctuating reference voltage input to an error amplifier in response to the pulse width of driving pulses applied to a switching element.
CONSTITUTION: Since voltage proportional to driving pulses is applied to an error amplifier 9 together with reference voltage, a DC-DC converter works so that the DC level of an overcurrent detecting level (OCP level) is elevated when the pulse width of driving pulses is large and the OCP level is lowered when pulse width is small. When pulse width exceeds the OCP level when the pulse width of driving pulses is large in an overcurrent detecting element 6, the pulse width of driving pulses is reduced by a control circuit 7 in response to an error signal from the error amplifier 9 and output voltage V0 is lowered. Foldback current limiting characteristics in which output currents I0 are also diminished with the reduction of the OCP level can be realized.
COPYRIGHT: (C)1990,JPO&Japio
JP26455888A 1988-10-20 1988-10-20 Expired - Lifetime JPH0556111B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP26455888A JPH0556111B2 (en) 1988-10-20 1988-10-20

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP26455888A JPH0556111B2 (en) 1988-10-20 1988-10-20

Publications (2)

Publication Number Publication Date
JPH02111257A true JPH02111257A (en) 1990-04-24
JPH0556111B2 JPH0556111B2 (en) 1993-08-18

Family

ID=17404948

Family Applications (1)

Application Number Title Priority Date Filing Date
JP26455888A Expired - Lifetime JPH0556111B2 (en) 1988-10-20 1988-10-20

Country Status (1)

Country Link
JP (1) JPH0556111B2 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992002072A1 (en) * 1990-07-25 1992-02-06 Power Trends, Inc. Miniaturized switching power supply with programmed level gate drive
WO1994018747A1 (en) * 1993-02-13 1994-08-18 Valor Electronics Inc Low power dc-dc converter
EP0618665A2 (en) * 1993-03-31 1994-10-05 Thomson Consumer Electronics, Inc. Feedback limited duty cycle switched mode power supply
EP0657987A1 (en) * 1993-12-10 1995-06-14 Siemens Aktiengesellschaft Switching converter with current limitation
KR20020072976A (en) * 2001-03-14 2002-09-19 현대중공업 주식회사 Current limiting method of DC/DC converter for Electric vehicle or Hybrid electric vehicle and it's apparatus
DE10018229B4 (en) * 2000-12-04 2005-05-19 Friwo Gerätebau Gmbh Method for regulating the output current and / or the output voltage of a switched-mode power supply
DE10116555B4 (en) * 2001-04-03 2005-06-23 Siemens Ag Switching regulator with protective function against consequential damage in case of component defects
AT14235U1 (en) * 2013-08-13 2015-06-15 Tridonic Gmbh & Co Kg Operating device for LED

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5265003A (en) * 1990-07-25 1993-11-23 Power Trends Miniaturized switching power supply with programmed level gate drive
EP0788232A3 (en) * 1990-07-25 1997-08-20 Power Trends Inc
WO1992002072A1 (en) * 1990-07-25 1992-02-06 Power Trends, Inc. Miniaturized switching power supply with programmed level gate drive
EP0788232A2 (en) * 1990-07-25 1997-08-06 Power Trends, Inc Miniaturized switching power supply with programmed level gate drive
US5629841A (en) * 1993-02-13 1997-05-13 Attwood; Brian E. Low power dc-dc converter
WO1994018747A1 (en) * 1993-02-13 1994-08-18 Valor Electronics Inc Low power dc-dc converter
EP0618665A3 (en) * 1993-03-31 1995-01-11 Thomson Consumer Electronics Feedback limited duty cycle switched mode power supply.
US5453921A (en) * 1993-03-31 1995-09-26 Thomson Consumer Electronics, Inc. Feedback limited duty cycle switched mode power supply
EP0618665A2 (en) * 1993-03-31 1994-10-05 Thomson Consumer Electronics, Inc. Feedback limited duty cycle switched mode power supply
SG95573A1 (en) * 1993-03-31 2003-04-23 Thomson Consumer Electronics Feedback limited duty cycle switched mode power supply
EP0657987A1 (en) * 1993-12-10 1995-06-14 Siemens Aktiengesellschaft Switching converter with current limitation
DE10018229B4 (en) * 2000-12-04 2005-05-19 Friwo Gerätebau Gmbh Method for regulating the output current and / or the output voltage of a switched-mode power supply
KR20020072976A (en) * 2001-03-14 2002-09-19 현대중공업 주식회사 Current limiting method of DC/DC converter for Electric vehicle or Hybrid electric vehicle and it's apparatus
DE10116555B4 (en) * 2001-04-03 2005-06-23 Siemens Ag Switching regulator with protective function against consequential damage in case of component defects
AT14235U1 (en) * 2013-08-13 2015-06-15 Tridonic Gmbh & Co Kg Operating device for LED
AT14235U8 (en) * 2013-08-13 2015-07-15 Tridonic Gmbh & Co Kg Operating device for LED

Also Published As

Publication number Publication date
JPH0556111B2 (en) 1993-08-18

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