CN107910913A - A kind of slow discharge circuit of DC power supply output - Google Patents

A kind of slow discharge circuit of DC power supply output Download PDF

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Publication number
CN107910913A
CN107910913A CN201711191396.2A CN201711191396A CN107910913A CN 107910913 A CN107910913 A CN 107910913A CN 201711191396 A CN201711191396 A CN 201711191396A CN 107910913 A CN107910913 A CN 107910913A
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CN
China
Prior art keywords
triode
diode
discharge circuit
output terminal
power
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.)
Withdrawn
Application number
CN201711191396.2A
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Chinese (zh)
Inventor
梁振生
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.)
Weixing Electronics Zhongshan Co Ltd
Original Assignee
Weixing Electronics Zhongshan 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 Weixing Electronics Zhongshan Co Ltd filed Critical Weixing Electronics Zhongshan Co Ltd
Priority to CN201711191396.2A priority Critical patent/CN107910913A/en
Publication of CN107910913A publication Critical patent/CN107910913A/en
Withdrawn legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/345Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electronic Switches (AREA)

Abstract

The invention discloses a kind of DC power supply to export slow discharge circuit, include the diode D1 for sampling DC power output end voltage and isolating, the diode D1 is connected with the capacitance C1 of storage diode D1 sampled voltages, the capacitance C1 is sequentially connected with the voltage comparator being connected respectively with DC power output end, discharge circuit, slow discharge circuit is connected in DC power output end, the residual voltage for the DC power output end for disconnecting power supply is released.

Description

A kind of slow discharge circuit of DC power supply output
[technical field]
The present invention relates to a kind of DC power supply to export slow discharge circuit.
[background technology]
The output terminal of existing DC power supply is usual and is connected to the filter capacitor of large capacity, is closed in the case of no load During the input terminal of disconnected DC power supply, its output terminal there remains higher voltage, and the attenuation process of this voltage can be persistently several Even several days a hour, electric shock phenomenon occurs when touching in human body.
With the circuit of LED lighting, generally concatenated by multiple light emitting diodes, there is filter capacitor at its both ends, works as pass After electricity, the storing up electricity on filter capacitor is consumed by light emitting diode, but the voltage on filter capacitor will as low as light emitting diode electricity During the turn-on threshold on road, the storing up electricity consumption on capacitance is very slow, and light emitting diode is in lightly conducting state at this time, produces faint light It is bright.
[content of the invention]
The invention overcomes the shortcomings of the above-mentioned technology and provides a kind of DC power supply to export slow discharge circuit, in direct current The slow discharge circuit of source output terminal connection, releases the residual voltage for the DC power output end for disconnecting power supply.
To achieve the above object, present invention employs following technical proposal:
A kind of slow discharge circuit of DC power supply output, include for sample DC power output end voltage and isolate two Pole pipe D1, the diode D1 are connected with the capacitance C1 of storage diode D1 sampled voltages, and the capacitance C1 has been sequentially connected with point Voltage comparator 1, the discharge circuit 2 not being connected with DC power output end.
The diode D1 positive terminals are connected with DC power anode output terminal, the diode D1 negative pole ends and capacitance C1 Positive terminal connects, and the capacitance C1 negative pole ends are connected with DC power cathode output terminal, and the voltage comparator 1 includes three poles Pipe Q1, the triode Q1 emitters are connected by resistance R1 with diode D1 negative pole ends, and the triode Q1 base stages pass through electricity Resistance R2 is connected with DC power anode output terminal, and the triode Q1 collectors are connected with discharge circuit 2, the discharge circuit 2 Include triode Q2, the triode Q2 base stages are connected with voltage comparator 1, and the triode Q2 collectors pass through resistance R3 It is connected with DC power anode output terminal, the triode Q2 emitters are connected with DC power cathode output terminal.
The diode D1 positive terminals are connected with DC power anode output terminal, the diode D1 negative pole ends and capacitance C1 Positive terminal connects, and the capacitance C1 negative pole ends are connected with DC power cathode output terminal, and the voltage comparator 1 includes three poles Pipe Q1, the triode Q1 emitters are connected with diode D1 negative pole ends, and the triode Q1 base stages pass through resistance R2 and direct current Positive pole output terminal connects, and the triode Q1 collectors are connected by resistance R1 with discharge circuit (2), the discharge circuit 2 include triode Q2, and the triode Q2 base stages are connected with voltage comparator (1), and the triode Q2 collectors pass through electricity Resistance R3 is connected with DC power anode output terminal, and the triode Q2 emitters are connected with DC power cathode output terminal.
The resistance R1 is adjustable resistance.
The diode D1 is reference voltage sampling element.
The beneficial effects of the invention are as follows:
The present invention is arranged in DC power output end, and the residual voltage that will be switched off the DC power output end of power supply is released Fall, prevent from disconnecting the residual voltage after powering and touched by human body and electric shock accidents occur, in power initiation process and normal operation When, this circuit, which is in, stops discharge condition, and consumption power is small, and the velocity of discharge can be adjusted as needed, and circuit is simple, only two The network port, number of elements is few, without special side door device, with convenient.
[brief description of the drawings]
Fig. 1 is one electrical block diagram of the embodiment of the present invention;
Fig. 2 is one circuit application schematic diagram of the embodiment of the present invention;
Fig. 3 is two electrical block diagram of the embodiment of the present invention;
Fig. 4 is two circuit application schematic diagram of the embodiment of the present invention.
[embodiment]
It is described in further detail below in conjunction with the accompanying drawings with embodiments of the present invention:
As shown in figures 1 and 3, a kind of slow discharge circuit of DC power supply output, it is characterised in that:Include straight for sampling Galvanic electricity source output terminal voltage and isolate diode D1, the diode D1 be connected with the capacitance of storage diode D1 sampled voltages C1, the capacitance C1 are sequentially connected with the voltage comparator (1) being connected respectively with DC power output end, discharge circuit (2).
Wherein, diode D1 is used to take electricity and buffer action, and the voltage of taking-up is stored in the capacitance C1 of series connection and is made For reference voltage, the triode Q1 in voltage comparator (1) is used to comparing reference voltage and electric power output voltage in capacitance C1, and three Pole pipe Q2 is used to discharge, and the resistance R1 is adjustable resistance, and for delaying the velocity of discharge of discharge circuit, while capacitance C1 compares direct current The velocity of discharge of positive pole output terminal V+ is slow, and the velocity of discharge of capacitance C1 is adjusted by capacitance C1 and resistance R1, and DC power supply is just The velocity of discharge of pole output terminal V+ is adjusted by the resistance R3 in filter capacitor C2 and discharge circuit (2).
As shown in Fig. 2, the one circuit course of work of embodiment:
The diode D1 positive terminals are connected with DC power anode output terminal, the diode D1 negative pole ends and capacitance C1 Positive terminal connects, and the capacitance C1 negative pole ends are connected with DC power cathode output terminal, and the voltage comparator (1) includes three Pole pipe Q1, the triode Q1 emitters are connected by resistance R1 with diode D1 negative pole ends, and the triode Q1 base stages pass through Resistance R2 is connected with DC power anode output terminal, and the triode Q1 collectors are connected with discharge circuit (2), the electric discharge electricity Road (2) includes triode Q2, and the triode Q2 base stages are connected with voltage comparator (1), and the triode Q2 collectors lead to Cross resistance R3 to be connected with DC power anode output terminal, the triode Q2 emitters are connected with DC power cathode output terminal.
When DC power anode output terminal V+ voltages rise, the conducting of diode D1 positively biaseds, rises and takes electro ultrafiltration, capacitance C1 fills Electricity, triode Q1 is because of the reverse-biased cut-off of base stage so that triode Q2 base stages no current and end, at this time circuit stop discharge shape State.
When DC power anode output terminal V+ voltage stabilizations, diode D1 because capacitance C1 is fully charged and no current end, Buffer action is played, voltage is less than V+ voltages because diode D1 has PN junction pressure drop on capacitance C1, serves and stores reference voltage, and three Pole pipe Q1 is because of the reverse-biased cut-off of base stage so that triode Q2 base stages no current ends, and circuit is stopping discharge condition at this time.
When DC power anode output terminal V+ voltages decline, and are less than capacitance C1 voltage 0.7V, reverse-biased section of diode D1 Only, triode Q1 base stages positively biased turns on so that triode Q2 base stages positively biased turns on, and DC power anode output terminal V+ voltages pass through Resistance R3 and triode Q2 electric discharges, at this time voltage of the circuit in discharge condition, i.e. release filter capacitor C2, while capacitance C1 Discharged by resistance R1, triode Q1 and triode Q2.
As shown in figure 4, the two circuit course of work of embodiment:
The diode D1 positive terminals are connected with DC power anode output terminal, the diode D1 negative pole ends and capacitance C1 Positive terminal connects, and the capacitance C1 negative pole ends are connected with DC power cathode output terminal, and the voltage comparator (1) includes three Pole pipe Q1, the triode Q1 emitters are connected with diode D1 negative pole ends, and the triode Q1 base stages are by resistance R2 and directly The cathode output end connection of galvanic electricity source, the triode Q1 collectors are connected by resistance R1 with discharge circuit (2), the electric discharge electricity Road (2) includes triode Q2, and the triode Q2 base stages are connected with voltage comparator (1), and the triode Q2 collectors lead to Cross resistance R3 to be connected with DC power anode output terminal, the triode Q2 emitters are connected with DC power cathode output terminal.
Similarly, when DC power anode output terminal V+ voltages rise, the conducting of diode D1 positively biaseds, rises and takes electro ultrafiltration, electricity Hold C1 charging, triode Q1 is because of the reverse-biased cut-off of base stage so that triode Q2 base stages no current and end, at this time circuit stop put Electricity condition.
When DC power anode output terminal V+ voltage stabilizations, diode D1 because capacitance C1 is fully charged and no current end, Buffer action is played, voltage is less than V+ voltages because diode D1 has PN junction pressure drop on capacitance C1, serves and stores reference voltage, and three Pole pipe Q1 is because of the reverse-biased cut-off of base stage so that triode Q2 base stages no current ends, and circuit is stopping discharge condition at this time.
When DC power anode output terminal V+ voltages decline, and are less than capacitance C1 voltage 0.7V, reverse-biased section of diode D1 Only, triode Q1 base stages positively biased turns on so that triode Q2 base stages positively biased turns on, and DC power anode output terminal V+ voltages pass through Resistance R3 and triode Q2 discharges, at this time voltage of the circuit in discharge condition, i.e. release filter capacitor C2.

Claims (5)

  1. A kind of 1. slow discharge circuit of DC power supply output, it is characterised in that:Include for sampling DC power output end voltage And the diode D1, the capacitance C1, the capacitance C1 that the diode D1 is connected with storage diode D1 sampled voltages isolated is suitable It is secondary to be connected with the voltage comparator (1) being connected respectively with DC power output end, discharge circuit (2).
  2. A kind of 2. slow discharge circuit of DC power supply output according to claim 1, it is characterised in that:The diode D1 is just Extremely it is connected with DC power anode output terminal, the diode D1 negative pole ends are connected with capacitance C1 positive terminals, the capacitance C1 Negative pole end is connected with DC power cathode output terminal, and the voltage comparator (1) includes triode Q1, the triode Q1 hairs Emitter-base bandgap grading is connected by resistance R1 with diode D1 negative pole ends, and the triode Q1 base stages are defeated by resistance R2 and DC power anode Outlet connects, and the triode Q1 collectors are connected with discharge circuit (2), and the discharge circuit (2) includes triode Q2, institute State triode Q2 base stages to be connected with voltage comparator (1), the triode Q2 collectors pass through resistance R3 and DC power anode Output terminal connects, and the triode Q2 emitters are connected with DC power cathode output terminal.
  3. A kind of 3. slow discharge circuit of DC power supply output according to claim 1, it is characterised in that:The diode D1 is just Extremely it is connected with DC power anode output terminal, the diode D1 negative pole ends are connected with capacitance C1 positive terminals, the capacitance C1 Negative pole end is connected with DC power cathode output terminal, and the voltage comparator (1) includes triode Q1, the triode Q1 hairs Emitter-base bandgap grading is connected with diode D1 negative pole ends, and the triode Q1 base stages are connected by resistance R2 with DC power anode output terminal, The triode Q1 collectors are connected by resistance R1 with discharge circuit (2), and the discharge circuit (2) includes triode Q2, The triode Q2 base stages are connected with voltage comparator (1), the triode Q2 collectors by resistance R3 and DC power supply just Pole output terminal connection, the triode Q2 emitters are connected with DC power cathode output terminal.
  4. A kind of 4. slow discharge circuit of DC power supply output according to claim 1, it is characterised in that:The resistance R1 is can Adjust resistance.
  5. A kind of 5. slow discharge circuit of DC power supply output according to claim 1, it is characterised in that:The diode D1 is Reference voltage sampling element.
CN201711191396.2A 2017-11-24 2017-11-24 A kind of slow discharge circuit of DC power supply output Withdrawn CN107910913A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711191396.2A CN107910913A (en) 2017-11-24 2017-11-24 A kind of slow discharge circuit of DC power supply output

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201711191396.2A CN107910913A (en) 2017-11-24 2017-11-24 A kind of slow discharge circuit of DC power supply output

Publications (1)

Publication Number Publication Date
CN107910913A true CN107910913A (en) 2018-04-13

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CN201711191396.2A Withdrawn CN107910913A (en) 2017-11-24 2017-11-24 A kind of slow discharge circuit of DC power supply output

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112039042A (en) * 2020-08-28 2020-12-04 Oppo(重庆)智能科技有限公司 Discharge circuit and electronic device
CN112186848A (en) * 2020-09-27 2021-01-05 深圳市创维群欣安防科技股份有限公司 Electric quantity release circuit of indicator lamp, power supply indicating circuit and electronic equipment

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2882064Y (en) * 2005-12-05 2007-03-21 东莞市长安璟品五金电子加工厂 Current stability circuit for vehicle
US20100277148A1 (en) * 2007-09-30 2010-11-04 Nxp B.V. Capless low drop-out voltage regulator with fast overvoltage response
CN202696946U (en) * 2012-06-26 2013-01-23 东莞珂立斯电源技术有限公司 Afterglow eliminating circuit
CN102938847A (en) * 2012-11-28 2013-02-20 徐州工业职业技术学院 Video signal failure warning control method
CN104518486A (en) * 2013-09-30 2015-04-15 上海贝尔股份有限公司 Discharge circuit for quickly discharging capacitor after powering off
CN205015462U (en) * 2015-10-20 2016-02-03 Tcl通力电子(惠州)有限公司 Battery electric discharge circuit
CN105471243A (en) * 2014-09-12 2016-04-06 南车株洲电力机车研究所有限公司 Limitation circuit of starting impact current
CN206506317U (en) * 2017-01-18 2017-09-19 广东振辉消防科技有限公司 A kind of circulating fire emergency lampses stand-by power supply battery charging and discharging management circuit

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2882064Y (en) * 2005-12-05 2007-03-21 东莞市长安璟品五金电子加工厂 Current stability circuit for vehicle
US20100277148A1 (en) * 2007-09-30 2010-11-04 Nxp B.V. Capless low drop-out voltage regulator with fast overvoltage response
CN202696946U (en) * 2012-06-26 2013-01-23 东莞珂立斯电源技术有限公司 Afterglow eliminating circuit
CN102938847A (en) * 2012-11-28 2013-02-20 徐州工业职业技术学院 Video signal failure warning control method
CN104518486A (en) * 2013-09-30 2015-04-15 上海贝尔股份有限公司 Discharge circuit for quickly discharging capacitor after powering off
CN105471243A (en) * 2014-09-12 2016-04-06 南车株洲电力机车研究所有限公司 Limitation circuit of starting impact current
CN205015462U (en) * 2015-10-20 2016-02-03 Tcl通力电子(惠州)有限公司 Battery electric discharge circuit
CN206506317U (en) * 2017-01-18 2017-09-19 广东振辉消防科技有限公司 A kind of circulating fire emergency lampses stand-by power supply battery charging and discharging management circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112039042A (en) * 2020-08-28 2020-12-04 Oppo(重庆)智能科技有限公司 Discharge circuit and electronic device
CN112039042B (en) * 2020-08-28 2022-09-02 Oppo(重庆)智能科技有限公司 Discharge circuit and electronic device
CN112186848A (en) * 2020-09-27 2021-01-05 深圳市创维群欣安防科技股份有限公司 Electric quantity release circuit of indicator lamp, power supply indicating circuit and electronic equipment

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Application publication date: 20180413

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