CN104466884A - Anti-transient-impact leakage protection integrated circuit internal biasing circuit - Google Patents
Anti-transient-impact leakage protection integrated circuit internal biasing circuit Download PDFInfo
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- CN104466884A CN104466884A CN201410844181.6A CN201410844181A CN104466884A CN 104466884 A CN104466884 A CN 104466884A CN 201410844181 A CN201410844181 A CN 201410844181A CN 104466884 A CN104466884 A CN 104466884A
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- 230000000087 stabilizing effect Effects 0.000 claims abstract description 8
- 230000001052 transient effect Effects 0.000 claims abstract description 8
- 230000001681 protective effect Effects 0.000 claims description 12
- 230000015556 catabolic process Effects 0.000 abstract 1
- 238000007599 discharging Methods 0.000 abstract 1
- 101100190527 Arabidopsis thaliana PIN5 gene Proteins 0.000 description 3
- 101150011456 PIN8 gene Proteins 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000003381 stabilizer Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000011109 contamination Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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- Semiconductor Integrated Circuits (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention relates to the field of integrated circuit design, in particular to an anti-transient-impact leakage protection integrated circuit internal biasing circuit capable of resisting transient high-impulse voltage and current impact. The internal biasing circuit comprises a power supply circuit and a reference biasing circuit. The power supply circuit is composed of a voltage stabilizing diode and a high-voltage transient discharging loop, the voltage in the circuit is gradually increased, when reaching the VD1+VD2+VD3 series breakdown voltage, the voltage continues to be increased, a power tube VN2 starts to be switched on, redundant currents will be discharged through the power tube, and therefore the anti-impact capacity of the circuit is improved. The reference biasing circuit is formed by a constant current device and a current power source composed of VN4, VN5, VN3 and R4 together.
Description
Technical field
The present invention relates to integrated circuit (IC) design field, be specially a kind of earth leakage protective IC interior biasing circuit of anti-transient impact.
Background technology
Power pack and reference offset circuit part is included in the structure of traditional earth leakage protective integrated circuit.Described power pack is composed in series by a resistance and multiple voltage stabilizing didoe, and when there being momentary pulse high-voltage impact in circuit, circuit is only dealt with by the reverse bleed off of voltage-stabiliser tube, and impact resistance is more weak; Described reference offset circuit part adds triode by a simple voltage-stabiliser tube and forms, and this kind of circuit is very responsive to voltage, and thus circuit stability is more weak.
Along with the use of domestic and international household electrical appliance is more and more general; transient impact on electrical network and other interference signal get more and more; especially the high-voltage pulse severe contamination electrical network of inductive load generation; leakage protection circuit or earth leakage circuit-breaker are formed simultaneously and threaten; serious made earth leakage protective integrated circuit damages thus causes earth leakage circuit-breaker to lose efficacy, and causes the electric shock accidents of personnel.
Summary of the invention
For the problems of the prior art, the invention provides a kind of earth leakage protective IC interior biasing circuit can resisting the anti-transient impact of high pulse voltage, rush of current instantaneously.
In order to achieve the above object, technical scheme of the present invention is: a kind of earth leakage protective integrated circuit of anti-transient impact, comprises power supply circuits and reference offset circuit two parts.Described power supply circuits are made up of voltage stabilizing didoe and high voltage transient bleed off loop, in circuit, voltage increases gradually, when reaching the series connection puncture voltage of VD1+VD2+VD3, voltage continues to increase, then power tube VN2 starts conducting, unnecessary electric current by this power tube bleed off, thus will enhance circuit impact resistance; The current and power supply that reference offset circuit is made up of a constant current device and VN4, VN5, VN3, R4 forms jointly,
Can find out that tool of the present invention has the following advantages according to such scheme: this kind of design have employed the mode suppressing power source change, thus enhance the stability of circuit, power supply circuits are made up of voltage stabilizing didoe and high voltage transient bleed off loop, enhance the anti-moment impact ability of circuit, the mode suppressing power source change is have employed in biased reference circuit design, JFET serves the effect of a constant current device, VN4, VN5, VN3, the current source of R4 composition has carried out logarithmic decrement to the fluctuation of power supply, enhance the stability of circuit, to sum up told, new earth leakage protective integrated circuit not only anti-moment impact ability strengthens, and the reaction of circuit to power-supply fluctuation is little, enhance the stability of circuit.
Accompanying drawing explanation
Accompanying drawing 1 is the circuit diagram of the weak earth leakage protective IC interior biasing circuit of traditional anti-transient impact ability.
Accompanying drawing 2 is the circuit diagram of the earth leakage protective IC interior biasing circuit of anti-transient impact of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further described.
An earth leakage protective integrated circuit for anti-transient impact, comprises power supply circuits and reference offset circuit two parts.Described power supply circuits are made up of voltage stabilizing didoe and high voltage transient bleed off loop, in circuit, voltage increases gradually, when reaching the series connection puncture voltage of VD1+VD2+VD3, voltage continues to increase, then power tube VN2 starts conducting, unnecessary electric current by this power tube bleed off, thus will enhance circuit impact resistance; The current and power supply that reference offset circuit is made up of a constant current device and VN4, VN5, VN3, R4 forms jointly, and this kind of design have employed the mode suppressing power source change, thus enhances the stability of circuit.
As Fig. 2, VR1, VD1, VD2, VD3, VN2, VR2 form source of stable pressure and high voltage transient said current dumping loop.
Operation principle is as follows: when P8 (circuit power) electric current increases (being powered from AC network by Series power resistance), the current potential of P8 raises gradually, when reaching the puncture voltage after VD1+VD2+VD3 series connection, P8 pin starts voltage stabilizing at 22V annex, if at this moment electric current continues to rise, then power tube VN2 starts conducting, and unwanted currents will, by this power tube bleed off, make the basic voltage stabilizing of PIN8 at about 22V.
As shown in Figure 1; traditional earth leakage protective integrated circuit unique current bleed off passage is the reverse bleed off of voltage-stabiliser tube; VN2 bleed off ability in relatively new improvement Fig. 2; gap is larger; because power tube VN2 conveyance capacity is very large; at more than 100mA, thus relative to traditional design, new design has stronger said current dumping ability.
When voltage ripple of power network, especially when very high line voltage, feeder ear PIN8 point current potential rises very fast, thus affects the stability of circuit.And new design ensure that when line voltage is very high, the current potential of PIN8 rises few (unwanted currents by bleed off to), thus enhances the stability of circuit.
Meanwhile, have employed the mode suppressing power source change in the bias current reference design in Fig. 2, JFET serves the effect of a constant current device, and the current source of VN4, VN5, VN3, R4 composition has done logarithmic decrement further to the fluctuation of power supply.
Based on above design, circuit is very little to the response fluctuation of power supply, and namely the fluctuation of line voltage does not affect the sensitivity of devices function leakage trigger substantially yet.
Comparatively speaking, tradition is as comparatively simple in Fig. 1 internal bias circuit design mode, and trigger sensitivity is responsive to line voltage.
Be understandable that, above about specific descriptions of the present invention, the technical scheme described by the embodiment of the present invention is only not limited to for illustration of the present invention, those of ordinary skill in the art is to be understood that, still can modify to the present invention or equivalent replacement, to reach identical technique effect; Needs are used, all within protection scope of the present invention as long as meet.
Claims (1)
1. the earth leakage protective integrated circuit of an anti-transient impact, comprise power supply circuits and reference offset circuit two parts, described power supply circuits are made up of voltage stabilizing didoe and high voltage transient bleed off loop, in circuit, voltage increases gradually, when reaching the series connection puncture voltage of VD1+VD2+VD3, voltage continues to increase, then power tube VN2 starts conducting, unnecessary electric current by this power tube bleed off, thus will enhance circuit impact resistance; The current and power supply that reference offset circuit is made up of a constant current device and VN4, VN5, VN3, R4 forms jointly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410844181.6A CN104466884B (en) | 2014-12-30 | 2014-12-30 | The earth leakage protective IC interior biasing circuit of anti-transient impact |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410844181.6A CN104466884B (en) | 2014-12-30 | 2014-12-30 | The earth leakage protective IC interior biasing circuit of anti-transient impact |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104466884A true CN104466884A (en) | 2015-03-25 |
| CN104466884B CN104466884B (en) | 2018-06-08 |
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| CN201410844181.6A Active CN104466884B (en) | 2014-12-30 | 2014-12-30 | The earth leakage protective IC interior biasing circuit of anti-transient impact |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103441738A (en) * | 2013-08-28 | 2013-12-11 | 贵州中科汉天下电子有限公司 | Multimode radio frequency power amplifier circuit and current bias method thereof |
| CN203788137U (en) * | 2014-02-20 | 2014-08-20 | 深圳Tcl新技术有限公司 | Overshoot protection circuit of output terminals of flyback power supply and flyback power supply |
| WO2015051223A1 (en) * | 2013-10-03 | 2015-04-09 | Enphase Energy, Inc. | Arc fault protection for power conversion |
| CN204349411U (en) * | 2014-12-30 | 2015-05-20 | 无锡展芯微电子有限公司 | The earth leakage protective IC interior biasing circuit of anti-transient impact |
-
2014
- 2014-12-30 CN CN201410844181.6A patent/CN104466884B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103441738A (en) * | 2013-08-28 | 2013-12-11 | 贵州中科汉天下电子有限公司 | Multimode radio frequency power amplifier circuit and current bias method thereof |
| WO2015051223A1 (en) * | 2013-10-03 | 2015-04-09 | Enphase Energy, Inc. | Arc fault protection for power conversion |
| CN203788137U (en) * | 2014-02-20 | 2014-08-20 | 深圳Tcl新技术有限公司 | Overshoot protection circuit of output terminals of flyback power supply and flyback power supply |
| CN204349411U (en) * | 2014-12-30 | 2015-05-20 | 无锡展芯微电子有限公司 | The earth leakage protective IC interior biasing circuit of anti-transient impact |
Non-Patent Citations (1)
| Title |
|---|
| 范镇淇: "漏电保护器专用芯片优化设计与应用技术研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑 （月刊 ）》 * |
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| Publication number | Publication date |
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| CN104466884B (en) | 2018-06-08 |
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| Date | Code | Title | Description |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180817 Address after: Room 507, 508, 509, 510, 511, Block A, Office Building 06-4, Liyuan Development Zone, Wuxi City, Jiangsu Province Patentee after: Wuxi core Lin Hua Technology Co.,Ltd. Address before: 214000 6000-A three, science and Technology Park, 34 plot 7, Changjiang Road, Wuxi New District, Wuxi, Jiangsu Patentee before: WUXI ZHANXIN MICROELECTRONICS Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Internal bias circuit of integrated circuit for leakage protection against transient impact Granted publication date: 20180608 Pledgee: Bank of China Wuxi Binhu sub branch Pledgor: Wuxi core Lin Hua Technology Co.,Ltd. Registration number: Y2024980011480 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |