CN105406454A - Discharge circuit - Google Patents
Discharge circuit Download PDFInfo
- Publication number
- CN105406454A CN105406454A CN201410460680.5A CN201410460680A CN105406454A CN 105406454 A CN105406454 A CN 105406454A CN 201410460680 A CN201410460680 A CN 201410460680A CN 105406454 A CN105406454 A CN 105406454A
- Authority
- CN
- China
- Prior art keywords
- discharge
- voltage output
- output end
- switching element
- switch trigger
- 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
Links
- 230000001105 regulatory effect Effects 0.000 description 8
- 238000007599 discharging Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000003381 stabilizer Substances 0.000 description 3
- 230000005856 abnormality Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000001012 protector Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 230000005283 ground state Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- NHDHVHZZCFYRSB-UHFFFAOYSA-N pyriproxyfen Chemical compound C=1C=CC=NC=1OC(C)COC(C=C1)=CC=C1OC1=CC=CC=C1 NHDHVHZZCFYRSB-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Dc-Dc Converters (AREA)
Abstract
The invention provides a discharge circuit characterized by comprising a discharge switch triggering unit, a discharge switch unit and a discharge resistor unit. The discharge switch unit and the discharge switch triggering unit are coupled, the discharge resistor unit and the discharge switch unit are coupled, and finally, the discharge switch triggering unit and the discharge resistor unit are coupled to a voltage output terminal. When the electric power provided by the voltage output terminal reaches a preset rated limit, an over-voltage protection system starts, meanwhile, the discharge switch unit is conducted through the discharge switch triggering unit, and the electric power by the voltage output terminal can be discharged by means of the discharge resistor unit.
Description
Technical field
The invention relates to a kind of discharge circuit, and relate to a kind of circuit framework reducing Circuits System loss especially.
Background technology
Along with the quick evolution of semiconductor technologies, such as computer and Peripheral digital product etc. thereof are also upgraded increasingly.At the application integrated circuit (IntegratedCircuit of computer and Peripheral digital product thereof, be called for short IC) in, due to the Rapid Variable Design of manufacture of semiconductor, cause the more diversified demand of ic power, so that application is as the pulse width modulation voltage stabilizer of the various different topology such as stepup transformer (BoostConverter), reducing transformer (BuckConverter), reach the different electrical power demand of various integrated circuit, also become one of factor of the utmost importance that digital versatile product can be provided.
When under abnormality; the output voltage of pulse-width regulating device may exceed specified restriction; so that damage the application circuit of pulse width modulation voltage stabilizer supply power supply; therefore system's application one is called overvoltage crowbar (OverVoltageProtectionCircuit usually; be called for short OVP) additional circuit pulse width modulation voltage stabilizer is quit work when output overvoltage occurs, under avoiding abnormality, application circuit is because of excessive pressure damages.
Known a kind of overvoltage crowbar, the voltage output end tying up to pulse-width regulating device arranges a circuit for detecting, this circuit for detecting can too high in the supply voltage detecting output time, automatically stop pulse-width regulating device start.
Discharge circuit is exported after known a kind of overvoltage protection, because pulse-width regulating device output is often furnished with the electrochemical capacitor of certain capacitance, when output load extremely light or unloaded time, even if pulse-width regulating device stops start, output voltage still just can must drop in safe range through certain hour (time span is relevant to capacitor's capacity), if there is this voltage of people's false touch easily to have injured danger in this period, therefore modal way can at the discharge resistance of pulse-width regulating device output certain value in parallel, principle accelerates the velocity of discharge for arranging a minimum load, but this method can produce a fixed loss at pulse-width regulating device output, reduce power supply conversion efficiency.
Therefore, inventor, in view of the disappearance of known techniques, for solving known problem, being the idea thought and improve, proposing a technology solved.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of discharge circuit, and when integrated circuit does not reach overvoltage protection state, the discharge resistance unit of electric discharge can not cause the loss of system.
Another object of the present invention is that temperature protection start-up point and overheat protector remove point for outside difference, and the gap that also adjustable temperature protection start-up point and overheat protector are removed between point is pulled open or reduces, and is more resiliently applied on actual track.
For reaching above-mentioned or other object, the present invention proposes a kind of discharge circuit, it is characterized in that comprising: a discharge switch trigger element, a discharge switching element and a discharge resistance unit.This discharge switching element and this discharge switch trigger element are formed and couple, and this discharge resistance unit and this discharge switching element are formed and couple, and last discharge switch trigger element and this discharge resistance unit and a voltage output end are formed and couple.Wherein, when the electric power that this voltage output end provides reaches default rated limit; overvoltage protection system will start, and make this discharge switching element conducting through discharge switch trigger element, the electric power of this voltage output end can carry out discharging action by this discharge resistance unit simultaneously.
In sum, by the collocation that the present invention utilizes design on circuit and associated component, making integrated circuit when not reaching overvoltage protection, can effectively avoid unnecessary loss.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of present pre-ferred embodiments.
Embodiment
For above and other objects of the present invention, feature and advantage can be become apparent, preferred embodiment cited below particularly, and coordinate institute's accompanying drawings, be described in detail below.
Refer to shown in Fig. 1, it is the circuit diagram of present pre-ferred embodiments.The present invention proposes a kind of discharge circuit, and it comprises: a discharge switch trigger element (10), a discharge switching element (11) and a discharge resistance unit (12).This discharge switching element (11) and this discharge switch trigger element (10) are formed and couple, this discharge resistance unit (12) and this discharge switching element (11) are formed and couple, finally this discharge switch trigger element (10) and this discharge resistance unit (12) are also formed with a voltage output end (20) and couple, and the voltage output end that this voltage output end (20) is pulse-width regulating device.
Wherein, this discharge switch trigger element (10) can be a transistor (the present embodiment is for the transistor of positive-negative-positive) or has the assembly of identical effect, and this discharge switching element (11) can be a lock stream device (SCR) or have the assembly of identical effect.In this explanation, this discharge switch trigger element (10) and a control unit (13) couple, and this control unit (13) object is that halt circuit start is to reach overvoltage protection object.This control unit (13) of the present embodiment for optocoupler diode, but is not limited according to this.
In addition, a divider resistance (14) and a votage control switch (15) can be included further between this discharge switch trigger element (10) and voltage output end (20), this votage control switch (15) Main Function is when this divider resistance (14) detects conducting when this voltage output end (20) meets overpressure condition, this state can make an electric current quit work by this control unit (13) and then by IC (figure does not draw), avoid this voltage output end (20) institute output power unstable and cause application circuit to damage, this votage control switch (15) that the present embodiment uses can be TL431 and maybe can use the assembly with identical effect.
When voltage output end (20) voltage reaches a rated limit value, the overpressure conditions that detects divider resistance (14) triggers this votage control switch (15), make this control unit (13) stop IC work by a current coupling to IC end, this program makes this discharge switch trigger element (10) excite this discharge switching element (11) to become conducting state.When this discharge switching element (11) is rendered as the state of conducting, this discharge resistance unit (12) forms ground state, so the electric power of this voltage output end (20) can carry out discharging action by this discharge resistance unit (12).
With aforementioned this control unit (13) after triggering, then send a control message to IC (figure does not draw), and circuit is decommissioned and energy cannot be reoffered to this voltage output end (20), therefore the electric power of this voltage output end (20) will decline gradually by this discharge resistance unit (12) carries out discharging action.When the magnitude of voltage that voltage output end (20) provides does not exceed this rated limit value, this discharge switching element (11) presents nonconducting state, once this discharge switching element (11) because of overvoltage protection present conducting state after and the electric power of this power output end (20) is discharged by this discharge resistance unit (12) time, when electric power Deng this power output end (20) is depleted, this discharge switching element (11) automatically returns to non-conduction state, power output end (20) and this discharge resistance unit (12) are formed without loop.Wherein, the speed of discharge rate can be decided by the resistance value changing this discharge resistance unit (12).
Framework in a circuit according to the invention, main feature is do not occurring under superpotential situation when integrated circuit, and the power circuit of this discharge resistance unit (12) is nonconducting state.Therefore, as known, the loss of integrated circuit can't can be caused under normally state, the efficiency performance of lifting entirety that on the contrary can be relative.
Although the present invention discloses as above with preferred embodiment; so itself and be not used to limit the present invention, anyly have the knack of this those skilled in the art, without departing from the spirit and scope of the present invention; when doing a little change and retouching, therefore protection scope of the present invention is worked as is that the scope that claim defines is as the criterion.
Claims (5)
1. a discharge circuit, is characterized in that comprising:
One discharge switch trigger element, it is coupled to a voltage output end;
One discharge switching element, it is coupled to this discharge switch trigger element; And
One discharge resistance unit, its one end is coupled to this discharge switching element, and the other end is coupled to this voltage output end;
Wherein, when the output voltage values that this voltage output end provides is more than a default value, this discharge switch trigger element will excite this discharge switching element to present conducting state, the electric power of this voltage output end declines gradually by this discharge resistance cell discharge, when the magnitude of voltage that this voltage output end provides drop to do not exceed this default value time, this discharge switch trigger element cannot excite this discharge switching element again, but this discharge switching element can continue to present conducting state, until the output of this voltage output end unregulated power, this discharge switching element will present nonconducting state.
2. discharge circuit as claimed in claim 1, is characterized in that this discharge switch trigger element is a transistor.
3. discharge circuit as claimed in claim 2, is characterized in that this discharge switching element one lock stream device (SCR).
4. discharge circuit as claimed in claim 3, is characterized in that this discharge switch trigger element couples with a control unit further.
5. discharge circuit as claimed in claim 4, is characterized in that including a divider resistance and a votage control switch further between this discharge switch trigger element and voltage output end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410460680.5A CN105406454A (en) | 2014-09-07 | 2014-09-07 | Discharge circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410460680.5A CN105406454A (en) | 2014-09-07 | 2014-09-07 | Discharge circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105406454A true CN105406454A (en) | 2016-03-16 |
Family
ID=55471779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410460680.5A Pending CN105406454A (en) | 2014-09-07 | 2014-09-07 | Discharge circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105406454A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106093580A (en) * | 2016-06-13 | 2016-11-09 | 国家电网公司 | A kind of transformator directly hinders measurement quick discharging circuit |
| CN106300312A (en) * | 2016-09-14 | 2017-01-04 | 海南电网有限责任公司海口供电局 | A kind of transformator directly hinders measurement double loop discharge circuit |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5400202A (en) * | 1992-06-15 | 1995-03-21 | Hewlett-Packard Company | Electrostatic discharge protection circuit for integrated circuits |
| CN102299512A (en) * | 2011-07-18 | 2011-12-28 | 中国电力科学研究院 | High-capacity capacitor overvoltage protection circuit adopting BOD (bistable optical device) element |
| CN103280765A (en) * | 2013-06-05 | 2013-09-04 | 青岛歌尔声学科技有限公司 | Overvoltage protection circuit |
| CN103346549A (en) * | 2013-07-08 | 2013-10-09 | 浙江光汇照明电子有限公司 | Two-level-type balancing circuit for super capacitor module |
| CN103595101A (en) * | 2013-11-23 | 2014-02-19 | 大连尚能科技发展有限公司 | Super-capacitor energy storing device |
-
2014
- 2014-09-07 CN CN201410460680.5A patent/CN105406454A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5400202A (en) * | 1992-06-15 | 1995-03-21 | Hewlett-Packard Company | Electrostatic discharge protection circuit for integrated circuits |
| CN102299512A (en) * | 2011-07-18 | 2011-12-28 | 中国电力科学研究院 | High-capacity capacitor overvoltage protection circuit adopting BOD (bistable optical device) element |
| CN103280765A (en) * | 2013-06-05 | 2013-09-04 | 青岛歌尔声学科技有限公司 | Overvoltage protection circuit |
| CN103346549A (en) * | 2013-07-08 | 2013-10-09 | 浙江光汇照明电子有限公司 | Two-level-type balancing circuit for super capacitor module |
| CN103595101A (en) * | 2013-11-23 | 2014-02-19 | 大连尚能科技发展有限公司 | Super-capacitor energy storing device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106093580A (en) * | 2016-06-13 | 2016-11-09 | 国家电网公司 | A kind of transformator directly hinders measurement quick discharging circuit |
| CN106300312A (en) * | 2016-09-14 | 2017-01-04 | 海南电网有限责任公司海口供电局 | A kind of transformator directly hinders measurement double loop discharge circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109687398B (en) | switching power supply circuit | |
| TWI532286B (en) | Discharge circuit | |
| US20200203943A1 (en) | Intelligent tri-mode solid state circuit breakers | |
| CN103545803B (en) | Device power supply (DPS) interface circuit protection device | |
| TW201530998A (en) | Switched capacitor DC-DC converter with reduced in-rush current and fault protection | |
| CN107210672A (en) | power supply unit | |
| CN107800117B (en) | Input overvoltage protection circuit with power-on surge current suppression function | |
| CN105262055A (en) | Overcurrent protection circuit with adjustable intermittent time | |
| CN104078940A (en) | Secondary power system and power supply device | |
| CN103036196A (en) | Device for overvoltage protection and method thereof | |
| US10923943B2 (en) | Battery powered device with pre-powered circuit | |
| CN205407247U (en) | Lightning protection circuit and electrical power unit | |
| CN204886147U (en) | Adjustable intermittence time's current foldback circuit | |
| CN202759375U (en) | Circuit topology structure used for controlling power supply starting impact current and extending power supply maintenance time | |
| CN106026061A (en) | Low-cost surge protection circuit | |
| EP3182572B1 (en) | Electronic circuit and method for operating an electronic circuit | |
| CN204068199U (en) | A kind of under-voltage surge current protection circuit | |
| CN105406454A (en) | Discharge circuit | |
| TWI530070B (en) | Method and apparatus of inrush current limitation | |
| CN105098705B (en) | A kind of earth leakage protective device | |
| KR20170096424A (en) | Surge Protection Circuit | |
| CN204168130U (en) | A kind of interchange inputs soft-start circuit | |
| CN204441850U (en) | A kind of stagnant ring current foldback circuit based on GJB181 surge suppressor | |
| CN204205547U (en) | Overcurrent protection circuit for high-power supply input end | |
| CN210380233U (en) | BUCK power output short-circuit protection circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160316 |