CN206834736U - A kind of mobile phone surging protection circuit - Google Patents
A kind of mobile phone surging protection circuit Download PDFInfo
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- CN206834736U CN206834736U CN201720145772.3U CN201720145772U CN206834736U CN 206834736 U CN206834736 U CN 206834736U CN 201720145772 U CN201720145772 U CN 201720145772U CN 206834736 U CN206834736 U CN 206834736U
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- mobile phone
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Abstract
The utility model discloses a kind of mobile phone surging protection circuit; including first class of protection circuit, safe secondary protection circuit and the three-level protective circuit being sequentially connected in series between mobile phone USB charging inlets and battery of mobile phone positive pole; the one-level, two level and three-level protective circuit clamp the voltage within first, second, and third clamp voltage respectively, to reach the purpose of limitation surge voltage protection cell phone charging circuit.For the utility model by protecting layer by layer, what the residual voltage at charger end may finally be released is very clean, reaches and protects mobile phone PMU, BB chip not burnt out by surge impact, mobile phone spoilage and maintenance cost is greatly reduced, circuit design is succinct, practical.
Description
Technical field
It the utility model is related to carrying out surge protection field, more particularly to a kind of mobile phone surging protection circuit.
Background technology
Because current phone, flat board, mobile electronic product generally use 5V, the charger such as 9V, 12V, but charger internal
It is to be depressured by transformer.Primary is basic and civil power is connected to.If civil power is unstable or on the ground often having a power failure
Area uses（Such as India, Southeast Asia）Have a power failure in city's electro-mechanical wave or repeatedly during incoming call, surge voltage will be produced.Surge passes through
Charger, it will conduct on mobile phone, and the voltage that universal mobile phone PMU chips are born at present is in this scope of 4.5-5V.It is if unrestrained
Potential conduction mobile phone terminal is gushed more than 5V, will burn out the master chips such as mobile phone PMU, BB.So as to cause mobile phone not started shooting on a large scale, no
Charging or remaining failure, are caused bad high after sale.Industry does not have a kind of reliable way to solve this problem at present.
Therefore, the interface protection electricity that a kind of circuit is simple, cost is low and can effectively protect mobile phone surge voltage how is designed
Road is industry technical problem urgently to be resolved hurrily.
Utility model content
The purpose of this utility model is in view of the above-mentioned drawbacks of the prior art, providing a kind of mobile phone carrying out surge protection electricity
Road.
Mobile phone surging protection circuit provided by the utility model includes：It is sequentially connected in series in mobile phone USB charging inlets and mobile phone
First class of protection circuit, safe secondary protection circuit and three-level protective circuit between anode, the one-level, two level and three-level protective
Circuit clamps the voltage within the first clamp voltage, the second clamp voltage and the 3rd clamp voltage respectively, to reach limitation wave
Gush the purpose of voltage protection cell phone charging circuit.
The first class of protection circuit includes first TVS pipe in parallel with mobile phone USB charging inlets, the safe secondary protection circuit
Including the OVP protection circuits for being serially connected in mobile phone USB charging inlets between the IC that charges, the three-level protective circuit includes being connected on filling
The second TVS pipe between electric IC and battery of mobile phone positive pole；
First TVS pipe is used for the surge voltage that clamper enters from the charger end of access mobile phone, clamps the voltage at
Within first clamp voltage；
The OVP protection circuits are used for when detecting that input voltage reaches the second clamp voltage, i.e. OVP trigger voltages,
Disconnecting circuit connects；
Second TVS pipe is used for the surge voltage of clamper front end residual, clamps the voltage within the 3rd clamp voltage.
First clamp voltage is 20V, and second clamp voltage is 6.8V, and the 3rd clamp voltage is 4.5V.
OVP chip models in first TVS pipe model ESDH7V0P1, OVP protection circuit are ET9539L, the 2nd TVS
Pipe model ESDBH4V5P1.
Compared with prior art, the utility model may finally release the residual voltage at charger end by protecting layer by layer
It is very clean, reach and protect mobile phone PMU, BB chip not burnt out by surge impact.So as to which mobile phone is greatly lowered because of wave
Gush impact and damage, mobile phone spoilage and maintenance cost is greatly reduced.Circuit design is succinct, practical.
Brief description of the drawings
Fig. 1 is the utility model circuit module figure；
Fig. 2 is the utility model integrated circuit figure.
Embodiment
Utility model is described in detail with reference to the accompanying drawings and examples.
The utility model proposes mobile phone surging protection circuit include：It is sequentially connected in series in mobile phone USB charging inlets and mobile phone
First class of protection circuit, safe secondary protection circuit and three-level protective circuit between anode VBAT, the one-level, two level and three-level
Protection circuit clamps the voltage within first, second, and third clamp voltage respectively, to reach limitation surge voltage protection hand
The purpose of machine charging circuit.
As shown in figure 1, the first class of protection circuit includes first TVS pipe in parallel with mobile phone USB charging inlets, described two
Level protection circuit includes the OVP protection circuits for being serially connected in mobile phone USB charging inlets between the IC that charges, the three-level protective circuit bag
Include the second TVS pipe being connected between charging IC and battery of mobile phone positive pole VBAT.
First TVS pipe is used for the surge voltage that clamper enters from the charger end of access mobile phone, clamps the voltage at
Within first clamp voltage；The OVP protection circuits are used to detect that input voltage reaches the second clamp voltage, i.e. OVP is touched
During the pressure that generates electricity, disconnecting circuit connection；Second TVS pipe is used for the surge voltage of clamper front end residual, clamps the voltage at the
Within three clamp voltages.
As shown in Fig. 2 illustrate by taking 5V charger for mobile phone as an example, after mobile phone insertion charger, under normal circumstances, charger
Output voltage is 4.75-5.25V, and under this scene, mobile phone can be charged normal and used.First TVS pipe D402 operating voltage
For 7V, because input voltage is not reaching to TVS operating voltages, TVS does not work.If civil power is unstable, when there is more than 7V at charger end
Surge voltage come after, the first TVS pipe D402 conducting, electric current is discharged.Clamp the voltage at the first clamp voltage, i.e. 20V
Within, reach the purpose of first class of protection.
OVP protection circuits：Because the first clamp voltage is higher, a higher surge residual voltage is also had, it is residual when what is left
When pressure is left to OVP chips U1501 input, if voltage is higher than OVP chips U1501 trigger voltage 6.8V, this voltage
A voltage detection circuit OVLO of OVP chip internals can be triggered, by OVLO sampling rates compared with the voltage door limitation more than 6.8V
Afterwards, the metal-oxide-semiconductor of inside can be closed rapidly in 100ns, so as to turn off the input and output side of OVP chips.Prevent higher electricity
Pressure is released to rear end, reaches second class protection purpose.
Low pressure TVS protection circuits：Because the trigger voltage of the second level is 6.8V, and PMU operating voltage maximum can only arrive
4.5V, excludes the pressure drop of middle charging IC and Rsensor impedances, or certain risk for burning PMU be present, so PMU ic's
First class of protection circuit is further added by input VBAT, selection work voltage is 4.5V the second TVS pipe, when front end has residual voltage to exceed
After 4.5V, TVS pipe conducting, electric current is discharged.Clamp the voltage within 4.5V, reach three-level level protection purpose.Wherein,
4.5V operating voltage is the 3rd clamp voltage.
In the present embodiment, the first order protects the sub- model ESDH7V0P1 of the first TVS pipe selected, and OVP chip models are
ET9539L.The sub- model ESDBH4V5P1 of the second TVS pipe that third level protection is selected.
Above-described embodiment is merely to illustrate specific embodiment of the present utility model.It should be pointed out that for this area
Those of ordinary skill for, without departing from the concept of the premise utility, some deformations and change can also be made, this
A little deformations and change should all belong to the scope of protection of the utility model.
Claims (4)
1. a kind of mobile phone surging protection circuit, it is characterised in that including being sequentially connected in series in mobile phone USB charging inlets and battery of mobile phone
First class of protection circuit, safe secondary protection circuit and three-level protective circuit between positive pole, the one-level, two level and three-level protective circuit
Clamp the voltage at respectively within the first clamp voltage, the second clamp voltage and the 3rd clamp voltage, to reach limitation surge electricity
The purpose of pressure protection cell phone charging circuit.
2. mobile phone surging protection circuit as claimed in claim 1, it is characterised in that the first class of protection circuit includes and mobile phone
USB charging inlets the first TVS pipe in parallel, the safe secondary protection circuit include being serially connected in mobile phone USB charging inlets and charging IC
Between OVP protection circuits, the three-level protective circuit include be connected on charging IC and battery of mobile phone positive pole between the 2nd TVS
Pipe；
First TVS pipe is used for the surge voltage that clamper enters from the charger end of access mobile phone, clamps the voltage at first
Within clamp voltage；
The OVP protection circuits are used for when detecting that input voltage reaches the second clamp voltage, i.e. OVP trigger voltages, disconnect
Circuit connects；
Second TVS pipe is used for the surge voltage of clamper front end residual, clamps the voltage within the 3rd clamp voltage.
3. mobile phone surging protection circuit as claimed in claim 1, it is characterised in that first clamp voltage is 20V, described
Second clamp voltage is 6.8V, and the 3rd clamp voltage is 4.5V.
4. mobile phone surging protection circuit as claimed in claim 1, it is characterised in that the first TVS pipe model ESDH7V0P1,
OVP chip models in OVP protection circuits are ET9539L, the second TVS pipe model ESDBH4V5P1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720145772.3U CN206834736U (en) | 2017-02-17 | 2017-02-17 | A kind of mobile phone surging protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720145772.3U CN206834736U (en) | 2017-02-17 | 2017-02-17 | A kind of mobile phone surging protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206834736U true CN206834736U (en) | 2018-01-02 |
Family
ID=60779243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720145772.3U Active CN206834736U (en) | 2017-02-17 | 2017-02-17 | A kind of mobile phone surging protection circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN206834736U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110120662A (en) * | 2019-04-28 | 2019-08-13 | 努比亚技术有限公司 | Circuit protection circuit |
| CN114156853A (en) * | 2022-01-11 | 2022-03-08 | 北京小米移动软件有限公司 | Terminal and charging protection circuit thereof |
-
2017
- 2017-02-17 CN CN201720145772.3U patent/CN206834736U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110120662A (en) * | 2019-04-28 | 2019-08-13 | 努比亚技术有限公司 | Circuit protection circuit |
| CN110120662B (en) * | 2019-04-28 | 2022-05-24 | 努比亚技术有限公司 | Line protection circuit |
| CN114156853A (en) * | 2022-01-11 | 2022-03-08 | 北京小米移动软件有限公司 | Terminal and charging protection circuit thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: Two road 518000 Guangdong city of Shenzhen province Nanshan District Xili Kan industrial building D No. 11 501 Patentee after: Yingwang Technology (Shenzhen) Co., Ltd. Address before: Shenzhen Nanshan District City, Guangdong province 518000 Dengliang road hancon center 702 Patentee before: Sono Technology (Shenzhen) Co., Ltd. |
|
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 253000 No. 6596, Dongfanghong East Road, Yuanqiao Town, economic and Technological Development Zone, De Zhou City, Shandong Province (e-n-303-46, Dezhou Zhongyuan science and technology innovation and entrepreneurship Park) Patentee after: Yingwang Technology (Shandong) Co.,Ltd. Address before: 518000 Room 501, building D, No. 11, Xili Dakan industrial Second Road, Nanshan District, Shenzhen City, Guangdong Province Patentee before: INONE TECHNOLOGY (SHENZHEN) Co.,Ltd. |
|
| CP03 | Change of name, title or address |