CN203850832U - Anti-reversal connection and low-power shutdown circuit for MID (Mobile Internet Device) battery - Google Patents
Anti-reversal connection and low-power shutdown circuit for MID (Mobile Internet Device) battery Download PDFInfo
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- CN203850832U CN203850832U CN201420240713.0U CN201420240713U CN203850832U CN 203850832 U CN203850832 U CN 203850832U CN 201420240713 U CN201420240713 U CN 201420240713U CN 203850832 U CN203850832 U CN 203850832U
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Abstract
The utility model discloses an anti-reversal connection and low-power shutdown circuit for a MID (Mobile Internet Device) battery. The circuit comprises a battery socket J1, a capacitor C19, a resistor R7, a resistor R8, a resistor R9, a resistor R6, a triode Q39 of a type of S8050, a P-type MOS tube Q4 of a type of A3401, and a capacitor C13. The capacitor C19 and the capacitor C13 have a filtering effect. The resistor R7 and the resistor R8 form a voltage-dividing circuit to control the cut-off and saturation conduction of the triode Q39. When the MID battery is reversely welded, the P-type MOS tube Q4 cannot be conducted, and the MID battery does not supply power to a mainboard. When voltage of the battery is higher than 3.6V, the triode Q39 is in saturation conduction. When voltage of the battery is lower than 3.5V, the triode Q39 is cut off, the P-type MOS tube Q4 cannot be conducted, and power cannot be supplied to the mainboard. By arranging a separator and a power manager for the battery, mainboard devices are prevented from being damaged when the battery is reversely welded, and low-power shutdown prevents the battery from excessive discharge.
Description
Technical field
The utility model relates to circuit field, relates in particular to that a kind of MID cell anti-reverse connects and low electric shutdown circuit.
Background technology
MID refers to mobile internet device, i.e. Mobile Internet Device, the internet terminal of a kind of new " larger than smart phone, less than notebook ".The concept of MID is that Intel released in April, 2007, and its definition is the product between smart mobile phone and net book.By the saying of Intel, be aly can improve high-end customer work efficiency, meet the demand of surfing the Net whenever and wherever possible, using comfortable, enjoy seemingly the surf the Net top pocket computer of enjoyment of PC for a long time.By the original intention of Intel design MID, MID be larger than smart mobile phone screen, than the more portative a kind of terminal of net book, be mainly and meet user's getting online at any moment, portable needs simultaneously.As portable mobile PC product, adopt the screen of 4 inches to 10 inches, operating system can be Windows, Linux, Android etc.
For MID, battery reversal connection causes damage for the meeting of equipment, and under correct connection status, if battery continuous discharge can affect the useful life of battery again.
Utility model content
The utility model proposes that a kind of MID cell anti-reverse connects and low electric shutdown circuit, it when the reversal connection of MID battery and when the electric weight of battery is too low, provides protection to equipment by separator and power management.
For realizing above-mentioned design, the utility model by the following technical solutions:
MID cell anti-reverse connects and a low electric shutdown circuit, comprising: P type metal-oxide-semiconductor Q4, capacitor C 13 that the triode Q39 that battery socket J1, capacitor C 19, resistance R 7, resistance R 8, resistance R 9, resistance R 6, model are S8050, model are A3401; The drain electrode of one end of pin 1 ground connection, pin 2 and the capacitor C 19 of described battery socket J1, cell voltage, one end of resistance R 7, one end of resistance R 9, P type metal-oxide-semiconductor Q4 is connected; One end of the other end of resistance R 7 and resistance R 8, the base stage of triode Q39 are connected; The collector electrode of triode Q39 is connected with one end of resistance R 6; The grid of the other end of the other end of resistance R 6 and resistance R 9, P type metal-oxide-semiconductor Q4 is connected; The source electrode of P type metal-oxide-semiconductor Q4 with one end of capacitor C 13, the voltage input end of mainboard be connected; The equal ground connection of the other end of the emitter of the other end of the other end of capacitor C 19, resistance R 8, triode Q39, capacitor C 13.
Wherein, the parameter of described capacitor C 19 is 10 μ F/6.3V; The resistance of described resistance R 7 is 330K Ω _ 1%; The resistance of described resistance R 8 is 68K Ω _ 1%; The resistance of described resistance R 9 is 330K Ω; The resistance of described resistance R 6 is 47K Ω; The model of described capacitor C 13 is C0402, and parameter is 0.1 μ F;
Wherein, _ 1% represents that error is within ± 1%.
The beneficial effects of the utility model are: by separator and power management are set for battery, prevent that battery weldering opposition mainboard device from causing damage, low electricity shutdown simultaneously prevents battery over-discharge can, affects the useful life of battery.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the utility model embodiment, below the accompanying drawing of required use during the utility model embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to the content of the utility model embodiment and these accompanying drawings other accompanying drawing.
Fig. 1 is that a kind of MID cell anti-reverse that the utility model embodiment provides connects and the circuit theory diagrams of low electric shutdown circuit.
Embodiment
For making technical problem that the utility model solves, the technical scheme of employing and the technique effect that reaches are clearer, below in conjunction with accompanying drawing, the technical scheme of the utility model embodiment is described in further detail, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiment.Embodiment based in the utility model, those skilled in the art are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the utility model protection.
Please refer to Fig. 1, its a kind of MID cell anti-reverse that is the utility model embodiment provides connects and the circuit theory diagrams of low electric shutdown circuit.As shown in the figure, this circuit comprises: P type metal-oxide-semiconductor Q4, capacitor C 13 that the triode Q39 that battery socket J1, capacitor C 19, resistance R 7, resistance R 8, resistance R 9, resistance R 6, model are S8050, model are A3401; The drain electrode of one end of pin 1 ground connection, pin 2 and the capacitor C 19 of described battery socket J1, cell voltage, one end of resistance R 7, one end of resistance R 9, P type metal-oxide-semiconductor Q4 is connected; One end of the other end of resistance R 7 and resistance R 8, the base stage of triode Q39 are connected; The collector electrode of triode Q39 is connected with one end of resistance R 6; The grid of the other end of the other end of resistance R 6 and resistance R 9, P type metal-oxide-semiconductor Q4 is connected; The source electrode of P type metal-oxide-semiconductor Q4 with one end of capacitor C 13, the voltage input end of mainboard be connected; The equal ground connection of the other end of the emitter of the other end of the other end of capacitor C 19, resistance R 8, triode Q39, capacitor C 13.
Preferably, the parameter of described capacitor C 19 is 10 μ F/6.3V; The resistance of described resistance R 7 is 330K Ω _ 1%; The resistance of described resistance R 8 is 68K Ω _ 1%; The resistance of described resistance R 9 is 330K Ω; The resistance of described resistance R 6 is 47K Ω; The model of described capacitor C 13 is C0402, and parameter is 0.1 μ F;
Wherein, _ 1% represents that error is within ± 1%.
In this circuit, capacitor C 19, capacitor C 13 play filter action, and in assurance circuit, electric current is stable.Resistance R 7 and resistance R 8 form cut-off and the saturation conduction that bleeder circuit is controlled triode Q39; Anti-when the weldering of MID battery, the relative mainboard of resistance R 8 ground is negative voltage, not conducting of P type metal-oxide-semiconductor Q4, and MID battery can not given main board power supply, and namely the VSYS terminal in figure does not have electric current output, has played anti-reverse effect; When cell voltage is during higher than 3.6V, the relative mainboard of resistance R 8 ground is that negative voltage is greater than 0.6V, triode Q39 saturation conduction condition; When cell voltage is during lower than 3.5V, triode Q39 cut-off, not conducting of P type metal-oxide-semiconductor Q4, MID battery is not given main board power supply.
Impedance between resistance R 9 and resistance R 6 and triode Q39, forms bleeder circuit, controls the conducting voltage UGS of P type metal-oxide-semiconductor Q4, P type metal-oxide-semiconductor Q4 conducting during triode Q39 conducting, give main board power supply, during triode Q39 cut-off, P type metal-oxide-semiconductor Q4 cut-off, does not give main board power supply.
In sum, by separator and power management are set for battery, prevent that battery weldering opposition mainboard device from causing damage, low electricity shutdown simultaneously prevents battery over-discharge can, affects the useful life of battery.
Above content is only preferred embodiment of the present utility model, for those of ordinary skill in the art, according to thought of the present utility model, all will change in specific embodiments and applications, this description should not be construed as restriction of the present utility model.
Claims (2)
1. a MID cell anti-reverse connects and low electric shutdown circuit, it is characterized in that, comprising: P type metal-oxide-semiconductor Q4, capacitor C 13 that the triode Q39 that battery socket J1, capacitor C 19, resistance R 7, resistance R 8, resistance R 9, resistance R 6, model are S8050, model are A3401; The drain electrode of one end of pin 1 ground connection, pin 2 and the capacitor C 19 of described battery socket J1, cell voltage, one end of resistance R 7, one end of resistance R 9, P type metal-oxide-semiconductor Q4 is connected; One end of the other end of resistance R 7 and resistance R 8, the base stage of triode Q39 are connected; The collector electrode of triode Q39 is connected with one end of resistance R 6; The grid of the other end of the other end of resistance R 6 and resistance R 9, P type metal-oxide-semiconductor Q4 is connected; The source electrode of P type metal-oxide-semiconductor Q4 with one end of capacitor C 13, the voltage input end of mainboard be connected; The equal ground connection of the other end of the emitter of the other end of the other end of capacitor C 19, resistance R 8, triode Q39, capacitor C 13.
2. a kind of MID cell anti-reverse according to claim 1 connects and low electric shutdown circuit, it is characterized in that, the parameter of described capacitor C 19 is 10 μ F/6.3V; The resistance of described resistance R 7 is 330K Ω _ 1%; The resistance of described resistance R 8 is 68K Ω _ 1%; The resistance of described resistance R 9 is 330K Ω; The resistance of described resistance R 6 is 47K Ω; The model of described capacitor C 13 is C0402, and parameter is 0.1 μ F;
Wherein, _ 1% represents that error is within ± 1%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420240713.0U CN203850832U (en) | 2014-05-12 | 2014-05-12 | Anti-reversal connection and low-power shutdown circuit for MID (Mobile Internet Device) battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420240713.0U CN203850832U (en) | 2014-05-12 | 2014-05-12 | Anti-reversal connection and low-power shutdown circuit for MID (Mobile Internet Device) battery |
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| Publication Number | Publication Date |
|---|---|
| CN203850832U true CN203850832U (en) | 2014-09-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420240713.0U Expired - Fee Related CN203850832U (en) | 2014-05-12 | 2014-05-12 | Anti-reversal connection and low-power shutdown circuit for MID (Mobile Internet Device) battery |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106849334A (en) * | 2017-03-10 | 2017-06-13 | 深圳市共进电子股份有限公司 | Source Current Control system |
| WO2019051994A1 (en) * | 2017-09-18 | 2019-03-21 | 深圳市沃特沃德股份有限公司 | Switch circuit and terminal device |
| CN113434000A (en) * | 2021-07-13 | 2021-09-24 | 苏州永锋机器人技术有限公司 | Laser positioning module circuit of integrated gyroscope |
-
2014
- 2014-05-12 CN CN201420240713.0U patent/CN203850832U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106849334A (en) * | 2017-03-10 | 2017-06-13 | 深圳市共进电子股份有限公司 | Source Current Control system |
| WO2019051994A1 (en) * | 2017-09-18 | 2019-03-21 | 深圳市沃特沃德股份有限公司 | Switch circuit and terminal device |
| CN113434000A (en) * | 2021-07-13 | 2021-09-24 | 苏州永锋机器人技术有限公司 | Laser positioning module circuit of integrated gyroscope |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140924 Termination date: 20160512 |