CN105305396A - ESD having anti-reverse protection integrated circuit - Google Patents
ESD having anti-reverse protection integrated circuit Download PDFInfo
- Publication number
- CN105305396A CN105305396A CN201410355799.6A CN201410355799A CN105305396A CN 105305396 A CN105305396 A CN 105305396A CN 201410355799 A CN201410355799 A CN 201410355799A CN 105305396 A CN105305396 A CN 105305396A
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- Prior art keywords
- esd
- integrated circuit
- reverse
- reverse protection
- protection
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- 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.)
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Emergency Protection Circuit Devices (AREA)
- Semiconductor Integrated Circuits (AREA)
Abstract
The invention discloses an ESD having an anti-reverse protection integrated circuit. The ESD comprises a comparator 2, a diode D2, a resistor R3 and a built-in portion of an input and output anti-backflow circuit. The ESD having the anti-reverse protection integrated circuit achieves battery anti-reverse protection and ESD protection while providing reliable guarantee of a chip.
Description
Technical field
The present invention relates to integrated circuit, be specifically related to a kind of ESD with anti-reverse Protective IC.
Background technology
In Charge Management adhesive integrated circuit, because output has lithium battery, therefore Application Engineer requires that this kind of chip can realize two protections: protection is filled with in battery reverse connecting protection and input and output counnter attack.Cell anti-reverse connect protection be requirement work as battery the output reversal connection of both positive and negative polarity with chip time, chip port can not be burned, while battery can not be pumped a large amount of electric charge.It is that input port removes, and ensures that electric current can not flow into the input of chip after battery access charging management chip port that protection is filled with in input and output counnter attack.Input and output are counter fills with protection realization very well, but battery reverse connecting protection is due to the existence of ESD diode, is difficult to realize.Therefore Charge Management IC in the market does not consider battery reverse connecting protection.Client needs to do reverse connecting protection, all needs to realize by increasing peripheral circuit.
Summary of the invention
The present invention is directed to deficiency of the prior art, a kind of ESD with anti-reverse Protective IC is provided.
The present invention is realized by following technical scheme: a kind of ESD with anti-reverse Protective IC, comprises comparator 2, diode D2, and the part of circuit is filled with in the input and output counnter attack that resistance R3 and inside inherently have.
Compared with prior art, present invention reduces cost, easily realize cell anti-reverse and connect protection and esd protection provides the guaranteed reliability of chip simultaneously.Produce in enormous quantities client, particularly during human weld's battery, greatly reduce the probability of damage of chip, improve the production efficiency of complete machine.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is ESD equivalent circuit of the present invention.
Embodiment
Below in conjunction with specific embodiment, the invention will be further described.
As shown in Figure 1 and Figure 2, a kind of ESD with anti-reverse Protective IC, comprises comparator 2, diode D2, and the part of circuit is filled with in the input and output counnter attack that resistance R3 and inside inherently have.
When battery during reversal connection, carries out detection of negative pressure by comparator 2 between BAT and GND, detect the polarity of battery.Comparator controls the grid of power P MOS, charge closing loop.Simultaneously because ESD diode counts VBAT port, the equivalent electric circuit when battery reversal connection by the switch of counnter attack filling circuit: the electric leakage of connected a back-to-back parasitic body diode, thorough resistance ESD diode.The performance that circuit protects at ESD is not affected, and when VBAT beats high pressure to GND, the pressure drop of parasitic diode is 0.7V, is equivalent to 0.7V is improved on former high pressure basis, accomplishes that forward is protected.When VBAT beats negative pressure to GND, same principle, the forward voltage drop of ESD diode is 0.7V, by the body diode of parasitism, plays reverse protection effect.
The foregoing is only and embody the preferred embodiment of the principle of the invention, therefore do not limit protection scope of the present invention, every equalization change done according to the present invention with modify within the scope of the claims of all containing in the present invention.
Claims (1)
1. have an ESD for anti-reverse Protective IC, it is characterized in that: comprise comparator 2, diode D2, the part of circuit is filled with in the input and output counnter attack that resistance R3 and inside inherently have.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410355799.6A CN105305396A (en) | 2014-07-22 | 2014-07-22 | ESD having anti-reverse protection integrated circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410355799.6A CN105305396A (en) | 2014-07-22 | 2014-07-22 | ESD having anti-reverse protection integrated circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105305396A true CN105305396A (en) | 2016-02-03 |
Family
ID=55202329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410355799.6A Pending CN105305396A (en) | 2014-07-22 | 2014-07-22 | ESD having anti-reverse protection integrated circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105305396A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110888517A (en) * | 2019-10-08 | 2020-03-17 | 深圳市稳先微电子有限公司 | System on chip |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100148585A1 (en) * | 2007-04-02 | 2010-06-17 | Natcon7 Gmbh | Hybrid installation with a biogas installation |
| CN201674260U (en) * | 2010-04-06 | 2010-12-15 | 江苏江禾高科电子有限公司 | Intelligent charger |
| CN202363900U (en) * | 2011-10-31 | 2012-08-01 | 深圳创维数字技术股份有限公司 | Circuit and USB power supply management chip for preventing USB interface current reverse irrigation |
| CN102956632A (en) * | 2011-08-31 | 2013-03-06 | 北京中电华大电子设计有限责任公司 | Two-way SCR (Silicon Controlled Rectifier)-based ESD (electrostatic discharge) protection structure with low parasitic capacitance |
| CN103347348A (en) * | 2013-07-23 | 2013-10-09 | 舒治成 | Solar LED streetlight controller |
| CN204046156U (en) * | 2014-07-22 | 2014-12-24 | 无锡麟力科技有限公司 | A kind of ESD with anti-reverse Protective IC |
-
2014
- 2014-07-22 CN CN201410355799.6A patent/CN105305396A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100148585A1 (en) * | 2007-04-02 | 2010-06-17 | Natcon7 Gmbh | Hybrid installation with a biogas installation |
| CN201674260U (en) * | 2010-04-06 | 2010-12-15 | 江苏江禾高科电子有限公司 | Intelligent charger |
| CN102956632A (en) * | 2011-08-31 | 2013-03-06 | 北京中电华大电子设计有限责任公司 | Two-way SCR (Silicon Controlled Rectifier)-based ESD (electrostatic discharge) protection structure with low parasitic capacitance |
| CN202363900U (en) * | 2011-10-31 | 2012-08-01 | 深圳创维数字技术股份有限公司 | Circuit and USB power supply management chip for preventing USB interface current reverse irrigation |
| CN103347348A (en) * | 2013-07-23 | 2013-10-09 | 舒治成 | Solar LED streetlight controller |
| CN204046156U (en) * | 2014-07-22 | 2014-12-24 | 无锡麟力科技有限公司 | A kind of ESD with anti-reverse Protective IC |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110888517A (en) * | 2019-10-08 | 2020-03-17 | 深圳市稳先微电子有限公司 | System on chip |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into 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: 20160203 |