CN204046156U - A kind of ESD with anti-reverse Protective IC - Google Patents
A kind of ESD with anti-reverse Protective IC Download PDFInfo
- Publication number
- CN204046156U CN204046156U CN201420410018.4U CN201420410018U CN204046156U CN 204046156 U CN204046156 U CN 204046156U CN 201420410018 U CN201420410018 U CN 201420410018U CN 204046156 U CN204046156 U CN 204046156U
- Authority
- CN
- China
- Prior art keywords
- esd
- reverse
- utility
- model
- protection
- 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.)
- Expired - Lifetime
Links
- 230000001681 protective effect Effects 0.000 title claims abstract description 8
- 230000004224 protection Effects 0.000 abstract description 15
- 230000003071 parasitic effect Effects 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 230000024241 parasitism Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Landscapes
- Emergency Protection Circuit Devices (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses a kind of ESD with anti-reverse Protective IC, 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.Realize cell anti-reverse and connect protection and esd protection provides the guaranteed reliability of chip simultaneously.
Description
Technical field
The utility model relates to integrated circuit, is 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 utility model, for deficiency of the prior art, provides a kind of ESD with anti-reverse Protective IC.
The utility model 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, the utility model reduces cost, easily realizes cell anti-reverse and connects 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 utility model;
Fig. 2 is the utility model ESD equivalent circuit.
Embodiment
Below in conjunction with specific embodiment, the utility model is described in further detail.
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 the preferred embodiment embodying the utility model principle, therefore do not limit protection range of the present utility model, every equalization change done according to the utility model with modify within the scope of the claims of all containing at the utility model.
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 |
|---|---|---|---|
| CN201420410018.4U CN204046156U (en) | 2014-07-22 | 2014-07-22 | A kind of ESD with anti-reverse Protective IC |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420410018.4U CN204046156U (en) | 2014-07-22 | 2014-07-22 | A kind of ESD with anti-reverse Protective IC |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204046156U true CN204046156U (en) | 2014-12-24 |
Family
ID=52246784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420410018.4U Expired - Lifetime CN204046156U (en) | 2014-07-22 | 2014-07-22 | A kind of ESD with anti-reverse Protective IC |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204046156U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105305396A (en) * | 2014-07-22 | 2016-02-03 | 无锡麟力科技有限公司 | ESD having anti-reverse protection integrated circuit |
-
2014
- 2014-07-22 CN CN201420410018.4U patent/CN204046156U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105305396A (en) * | 2014-07-22 | 2016-02-03 | 无锡麟力科技有限公司 | ESD having anti-reverse protection integrated circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203434607U (en) | Lithium battery pack charging protection circuit | |
| CN205212423U (en) | Protection circuit of electric motor car intelligent charging ware | |
| CN206099459U (en) | A activation circuit for battery management system | |
| CN204103466U (en) | A kind of metal-oxide-semiconductor type solar recharging protective circuit | |
| CN204046156U (en) | A kind of ESD with anti-reverse Protective IC | |
| CN105305540A (en) | ESD with reverse connection preventing protection integrated circuit | |
| CN204290423U (en) | Lithium battery charging circuit | |
| CN105305396A (en) | ESD having anti-reverse protection integrated circuit | |
| CN204118791U (en) | The control protection electric circuit of portable power source | |
| CN103633675B (en) | Battery charger polarity Adaptable System | |
| CN202014088U (en) | Overdischarge protector of solar power system storage battery | |
| CN103683394A (en) | Charge protection circuit for storage battery | |
| CN208674915U (en) | A kind of input and output polarity reverse connection prevention protection circuit for charger | |
| CN208849474U (en) | A kind of charger without polarity | |
| CN204517381U (en) | A kind of wireless dust collector battery protecting circuit | |
| CN201877799U (en) | Universal serial bus (USB) protection circuit | |
| CN204046163U (en) | Multi-purposed charger output polarity reverse-connection protection circuit | |
| CN204216576U (en) | A kind of lithium ionic battery protection circuit | |
| CN204031100U (en) | A kind of voltage shaping circuit | |
| CN204559124U (en) | A kind of based on the cell anti-reverse device of lithium battery photovoltaic against Ore-controlling Role | |
| CN203983967U (en) | Be applicable to the over circuit of Li-Ion rechargeable battery system | |
| CN204538653U (en) | A kind of guard of computer circuit | |
| CN103560160B (en) | Solar module | |
| CN204495890U (en) | Clock power feed circuit | |
| CN205846774U (en) | A kind of standby battery circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141224 |