CN204424936U - A kind of battery feed circuit - Google Patents
A kind of battery feed circuit Download PDFInfo
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- CN204424936U CN204424936U CN201420800031.0U CN201420800031U CN204424936U CN 204424936 U CN204424936 U CN 204424936U CN 201420800031 U CN201420800031 U CN 201420800031U CN 204424936 U CN204424936 U CN 204424936U
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Abstract
The utility model discloses a kind of battery feed circuit, comprise metal-oxide-semiconductor, the first triode, the second triode and some resistance thereof, supplying cell is connected with the source electrode of metal-oxide-semiconductor, be connected with the drain electrode of metal-oxide-semiconductor for electric loading, by the width regulation and control output voltage of metal-oxide-semiconductor raceway groove, by the second triode as diverter switch, when input voltage exceedes predeterminated voltage, circuit is switched to voltage stabilizing state, by output voltage clamper at predeterminated voltage; When the not enough predeterminated voltage of input voltage, circuit is switched to conducting state, input voltage is exported to for electric loading with negligible pressure drop.The power supply circuits of design like this, can in supplying cell electricity abundance, normal voltage stabilizing makes load circuit normally work, and simultaneously can under supplying cell voltage drop to predeterminated voltage in, eliminate pressure drop, direct power supply, makes supplying cell electricity be fully utilized, and extends the service time of supplying cell.
Description
Technical field
The utility model relates to a kind of battery feed circuit, particularly relates to a kind of battery feed circuit extending service time of battery.
Background technology
Battery feed circuit is connected to supplying cell and between electric loading, for burning voltage, cell voltage is converted into the circuit structure for electric loading required voltage.Battery power voltage is all a scope usually, and the battery feed circuit of prior art is sufficient at battery electric quantity, when input voltage is higher, can, by output voltage clamper in predeterminated voltage, load normally be worked; But lower at battery electric quantity, when input voltage is lower, because power supply circuits itself can produce certain pressure drop, cause output voltage not meet the needs of loaded work piece, cannot normally work, the utilization ratio of battery is reduced.
Utility model content
The purpose of this utility model is the deficiency overcoming prior art, a kind of battery feed circuit is provided, by the improvement to voltage stabilizing circuit, at output voltage, place sets up feedback switch, voltage stabilizing circuit is adopted by output voltage clamper at predeterminated voltage when voltage is higher, the automatic transfer switch when voltage is lower, is directly inputted into for electric loading, to improve the utilization ratio of battery by the voltage of supplying cell.
The utility model solves the technical scheme that its technical problem adopts: a kind of battery feed circuit, be be connected to supplying cell and supply between electric loading, this battery feed circuit comprises metal-oxide-semiconductor, the first triode, the second triode, the first resistance, the second resistance, the 3rd resistance, the 4th resistance and the 5th resistance; The source electrode of described metal-oxide-semiconductor is connected to supplying cell, and the drain electrode of described metal-oxide-semiconductor is connected to for electric loading, and the grid of described metal-oxide-semiconductor is connected to the collector electrode of described first triode, and the collector electrode of described first triode is connected to supplying cell by the second resistance; The grounded emitter of described first triode, the base stage of described first triode is connected to the collector electrode of the second triode and is connected to supplying cell by the first resistance, and the base stage of described first triode is by the 4th grounding through resistance; The emitter grounding of described second triode; One end of described 3rd resistance is connected in series mutually with one end of the 5th resistance, and its serial connection point is also connected with the base stage of the second triode, and the other end of described 3rd resistance is connected to for electric loading, the other end ground connection of described 5th resistance.
Preferably, also comprise the 6th resistance, described second resistance is connected with the collector electrode of the first triode by described 6th resistance with the grid of described metal-oxide-semiconductor.
Preferably, described metal-oxide-semiconductor is P channel structure.
Preferably, the first triode, the second triode are NPN structure.
The beneficial effects of the utility model are:
1. supplying cell is connected with the source electrode of metal-oxide-semiconductor, be connected with the drain electrode of metal-oxide-semiconductor for electric loading, by the width regulation and control output voltage of metal-oxide-semiconductor raceway groove, by the second triode as diverter switch, when input voltage exceedes predeterminated voltage, circuit is switched to voltage stabilizing state, by output voltage clamper at predeterminated voltage; When the not enough predeterminated voltage of input voltage, circuit is switched to conducting state, make input voltage export to for electric loading with negligible pressure drop; The power supply circuits of design like this, can in supplying cell electricity abundance, normal voltage stabilizing makes load circuit normally work, and simultaneously can under supplying cell voltage drop to predeterminated voltage in, eliminate pressure drop, direct power supply, makes supplying cell electricity be fully utilized, and extends the service time of supplying cell.
2. the collector electrode of the first triode is connected with the collector electrode of the first triode by the 6th resistance with the grid of metal-oxide-semiconductor, 6th resistance can carry out type selecting according to the voltage difference of the model of metal-oxide-semiconductor and battery, dividing potential drop is carried out to circuit, export suitable threshold value to gate source voltage, the needs of more realistic use.
Below in conjunction with drawings and Examples, the utility model is described in further detail; But a kind of battery feed circuit of the present utility model is not limited to embodiment.
Accompanying drawing explanation
Fig. 1 is circuit connection diagram of the present utility model.
Embodiment
Embodiment, shown in Figure 1, a kind of battery feed circuit of the present utility model, be connected to supplying cell BAT_IN and supply between electric loading MCU, this battery feed circuit comprises metal-oxide-semiconductor Q1, the first triode Q2, the second triode Q3, the first resistance R1, the second resistance R2, the 3rd resistance R3, the 4th resistance R4 and the 5th resistance R5; The source electrode of described metal-oxide-semiconductor Q1 is connected to supplying cell BAT_IN, the drain electrode of described metal-oxide-semiconductor Q1 is connected to for electric loading MCU, the grid of described metal-oxide-semiconductor Q1 is connected to the collector electrode of described first triode Q2, and the collector electrode of described first triode Q2 is connected to supplying cell BAT_IN by the second resistance R2; The grounded emitter of described first triode Q2, the base stage of described first triode Q2 is connected to the collector electrode of the second triode Q3 and is connected to supplying cell BAT_IN by the first resistance R1, and the base stage of described first triode Q2 is by the 4th resistance R4 ground connection; The emitter grounding of described second triode Q3; One end of described 3rd resistance R3 is connected in series mutually with one end of the 5th resistance R5, and its serial connection point is also connected with the base stage of the second triode Q3, and the other end of described 3rd resistance R3 is connected to for electric loading MCU, the other end ground connection of described 5th resistance R5.
Preferred as one, also comprise the 6th resistance R6, described second resistance R2 is connected with the collector electrode of the first triode Q2 by described 6th resistance R6 with the grid of described metal-oxide-semiconductor Q1.
Preferred as one, described metal-oxide-semiconductor Q1 is P channel structure.
Preferred as one, the first triode Q2, the second triode Q3 are NPN structure.
The course of work of a kind of battery feed circuit of the present utility model is as follows:
According to needing setting one predeterminated voltage for electric loading MCU, namely adjust the size of the 3rd resistance R3 and the 5th resistance R5; Adjust the proportionate relationship of the 3rd resistance R3 and the 5th resistance R5 afterwards, when equaling predeterminated voltage to make output voltage, the lucky conducting of the second triode; Second triode Q3 is namely as the diverter switch of voltage stabilizing state and conducting state, and the second triode Q3 also can use a metal-oxide-semiconductor to replace the function realizing switch.
When the input voltage of supplying cell BAT_IN is higher, when namely exceeding predeterminated voltage, work in voltage stabilizing state, the second triode starts conducting, and input voltage clamper is in predeterminated voltage; First triode base stage starts cut-off, namely the collector potential of the first triode changes along with the current potential that the second triode Q3 base stage is fed back and changes, form negative feedback control, feedback voltage rises, even if the gate source voltage of metal-oxide-semiconductor Q1 grid declines, reduces output voltage, feedback voltage declines, even if metal-oxide-semiconductor Q1 gate source voltage rise, improve output voltage, with make output potential all the time clamper at predeterminated voltage.
When the output voltage deficiency predeterminated voltage of supplying cell BAT_IN, work in conducting state, the second triode Q3 ends, and output voltage is no better than input voltage; First triode Q2 conducting, the collector potential of the first triode Q2 drops to intimate ground connection, and the gate source voltage of metal-oxide-semiconductor Q1 reaches maximum, the complete conducting of metal-oxide-semiconductor Q1, and input voltage is exported to for electric loading MCU with negligible pressure drop.
Above-described embodiment is only used for further illustrating a kind of battery feed circuit of the present utility model; but the utility model is not limited to embodiment; every above embodiment is done according to technical spirit of the present utility model any simple modification, equivalent variations and modification, all fall in the protection range of technical solutions of the utility model.
Claims (4)
1. a battery feed circuit, be connected to supplying cell and between electric loading, it is characterized in that: this battery feed circuit comprises metal-oxide-semiconductor, the first triode, the second triode, the first resistance, the second resistance, the 3rd resistance, the 4th resistance and the 5th resistance; The source electrode of described metal-oxide-semiconductor is connected to supplying cell, and the drain electrode of described metal-oxide-semiconductor is connected to for electric loading, and the grid of described metal-oxide-semiconductor is connected to the collector electrode of described first triode, and the collector electrode of described first triode is connected to supplying cell by the second resistance; The grounded emitter of described first triode, the base stage of described first triode is connected to the collector electrode of the second triode and is connected to supplying cell by the first resistance, and the base stage of described first triode is by the 4th grounding through resistance; The emitter grounding of described second triode; One end of described 3rd resistance is connected in series mutually with one end of the 5th resistance, and its serial connection point is also connected with the base stage of the second triode, and the other end of described 3rd resistance is connected to for electric loading, the other end ground connection of described 5th resistance.
2. battery feed circuit according to claim 1, is characterized in that: also comprise the 6th resistance, and described second resistance is connected with the collector electrode of the first triode by described 6th resistance with the grid of described metal-oxide-semiconductor.
3. battery feed circuit according to claim 1, is characterized in that: described metal-oxide-semiconductor is P channel structure.
4. battery feed circuit according to claim 3, is characterized in that: the first triode, the second triode are NPN structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420800031.0U CN204424936U (en) | 2014-12-16 | 2014-12-16 | A kind of battery feed circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420800031.0U CN204424936U (en) | 2014-12-16 | 2014-12-16 | A kind of battery feed circuit |
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| Publication Number | Publication Date |
|---|---|
| CN204424936U true CN204424936U (en) | 2015-06-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420800031.0U Active CN204424936U (en) | 2014-12-16 | 2014-12-16 | A kind of battery feed circuit |
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| CN (1) | CN204424936U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105762854A (en) * | 2014-12-16 | 2016-07-13 | 厦门雅迅网络股份有限公司 | Battery power supply circuit and power supply method thereof |
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2014
- 2014-12-16 CN CN201420800031.0U patent/CN204424936U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105762854A (en) * | 2014-12-16 | 2016-07-13 | 厦门雅迅网络股份有限公司 | Battery power supply circuit and power supply method thereof |
| CN105762854B (en) * | 2014-12-16 | 2019-11-05 | 厦门雅迅网络股份有限公司 | A kind of battery feed circuit and method of supplying power to |
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