CN201392483Y - Voltage reducing type voltage stabilizing circuit - Google Patents
Voltage reducing type voltage stabilizing circuit Download PDFInfo
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- CN201392483Y CN201392483Y CN200920052290U CN200920052290U CN201392483Y CN 201392483 Y CN201392483 Y CN 201392483Y CN 200920052290 U CN200920052290 U CN 200920052290U CN 200920052290 U CN200920052290 U CN 200920052290U CN 201392483 Y CN201392483 Y CN 201392483Y
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Abstract
The utility model discloses a voltage reducing type voltage stabilizing power supply circuit which can realize low power-consumption standby. The circuit comprises an input end A, an output end B, a control end, a signal input end and a signal detection end. The input end A is connected with a positive pole of a battery, the output end B is connected with a load, a first switch circuit used for controlling the electrical energy output of the battery is connected between the input end and the output end, the control end which receives external signals controls the switching-on/off of the first switch circuit by a second switch circuit, the output end is connected with a detecting circuit, the signal input end and the signal detection end which are arranged in the detecting circuit are connected with an external intelligent unit, and the intelligent unit is connected with the second switch circuit by the control end. The voltage reducing type voltage stabilizing circuit adopts simple structure, leads fairly low standby power consumption, and is widely applied on products which are powered by the battery and have low requirements for the stability of output voltage and for the standby power consumption.
Description
Technical field
The utility model relates to a kind of reduction voltage circuit, specifically is meant the low-down buck mu balanced circuit of a kind of stand-by power consumption.
Background technology
At present, existing miniwatt reduction voltage circuit mainly contains two kinds: 1) Zhuan Yong step-down IC, and for example 7805 etc., this class IC self working current is big, generally needs 2mA, so during its band heavy load, along with diminishing of output current, its conversion efficiency is also low more; 2) Buck (step-down) circuit: current sinking was bigger when the shortcoming of this type of circuit was static state, generally about 0.3mA, and the circuit complexity, used components and parts are many.
The utility model content
It is lower that the utility model is intended to solve present low current reduction voltage circuit efficiency ratio, the circuit complicated problems, and then the low-power consumption reduction voltage circuit of a kind of static current sinking less than 30uA is provided.
For achieving the above object, the technical scheme taked of the utility model is:
A kind of buck mu balanced circuit has the input end that is connected with anode, the output terminal that is connected with load, control end, signal input part and input end; Be connected with first on-off circuit that is used to control battery power output between described input end and the output terminal; Described control end receives external signal and controls the first on-off circuit break-make by the second switch circuit; Described output terminal connects a testing circuit, and described signal input part, input end are arranged in the testing circuit and are connected with the external smart unit, and intelligent cell connects the second switch circuit by control end.
Wherein, first on-off circuit can adopt the switch triode circuit also can adopt switch mosfet pipe circuit, and the switch mosfet pipe has the enlargement factor height, the characteristics that power consumption is littler.
The utility model adopts intermittent duty: the time of the first switching tube conducting is very short, and interval time is long as far as possible, thereby reaches the purpose that reduces stand-by power consumption; Simultaneously the first switching tube output terminal adopts jumbo capacitance energy storage, reducing the ripple that causes because of intermittent duty, and can shorten the ON time of first switching tube, makes stand-by power consumption lower; Moreover employing has the intelligent cell of standby mode and low-speed mode to control.
The utility model is simple for structure, and stand-by power consumption is very low, be widely used in battery-powered, not high but require stand-by power consumption to the stability requirement of output voltage than on the low production.
Description of drawings
Fig. 1 is the utility model embodiment circuit theory synoptic diagram.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
As shown in the figure, the utility model comprises input end A, output terminal B, control end Qout, signal input part Vpluse and the input end D that is connected with anode.First on-off circuit of being made up of field effect transistor Q1 is connected between input end A and the output terminal B, and in addition by the second switch circuit of being made up of triode Q2, its reception is from the signal of external smart unit and then control the break-make of first on-off circuit; The testing circuit of being made up of chip TL431 is connected with output terminal B, and signal input part Vpluse, input end D are arranged in the testing circuit and are connected with the external smart unit.
As figure, the Q1 source electrode connects anode by resistance R 1 in described first on-off circuit, drains promptly as output terminal B, and by capacitor C 1 ground connection, is connected to resistance R 5, the R2 of series connection between grid and source electrode.Triode Q2 collector connects the R5 other end in first on-off circuit in described first on-off circuit, emitter grounding, and base stage connects intelligent cell by resistance R 6.Described testing circuit adopts parallel connection type three-terminal voltage-stabilizing fiducial chip TL431, and its 1 pin connects output terminal B, connects self 2 pin by R7 by resistance R 3, and its 3 pin is as the input end, connect resistance R 4 simultaneously, and resistance R 4 other ends are signal input part.Described intelligent cell adopts the control chip of MCU type.
In fact the utility model circuit adopts and is similar to pulse modulated mode cell voltage is reduced, and by output terminal B supply load, realizes the function of step-down IC, and this circuit has characteristics simple for structure, low in energy consumption.
Specify the course of work of the present utility model below for example:
A.MCU wakes up, works in low-speed mode;
High level of Vpluse pin output of B.MCU is given testing circuit;
C. the MCU behind the 0.4ms of delaying time judges the state of DETECT pin;
If testing result is a low level, expression output terminal B voltage is higher than required value, and then the Qout pin output low level of MCU is ended triode Q2, closes metal-oxide-semiconductor Q1, stops to charge to C1;
If testing result is a high level, expression output terminal B voltage is lower than required value, then the Qout pin of MCU output high level, make triode Q2 conducting, metal-oxide-semiconductor Q1 conducting, described electric energy arrives output terminal B through input end A, resistance R 1, MOSFET pipe Q1 source electrode, drain electrode, is capacitor C 1 charging simultaneously.
The D.Vpluse output low level;
E.MCU stops low-speed mode, transfers sleep (standby) pattern to.
Control chip MCU is set wakes up once every 5ms, its said process approximately needs the working time of 0.6ms to finish the work of the voltage detecting and the respective handling of battery.
Present embodiment adopts intermittent duty, promptly the time of metal-oxide-semiconductor Q1 conducting very short, and interval time is long as far as possible, thereby reaches the purpose that reduces stand-by power consumption; And utilize the characteristics of MOSFET pipe high-amplification-factor, realize that with extremely low loss (triode Q2 to vagabond current) battery power shifts (to capacitor C 1 charging); Wherein C1 adopts the ripple that jumbo electric capacity produces because of intermittent duty with minimizing, and can shorten the ON time of Q1, makes stand-by power consumption lower; Intelligent cell adopts the IC that standby mode and low-speed mode are arranged.
Claims (5)
1, a kind of buck mu balanced circuit comprises the input end that is connected with anode, the output terminal that is connected with load, control end, signal input part and input end, it is characterized in that:
Be connected with first on-off circuit that is used to control battery power output between described input end and the output terminal;
Described control end receives external signal and controls the first on-off circuit break-make by the second switch circuit;
Described output terminal connects a testing circuit, and described signal input part, input end are arranged in the testing circuit and are connected with the external smart unit, and intelligent cell connects the second switch circuit by control end.
2, buck mu balanced circuit according to claim 1 is characterized in that: described first on-off circuit adopts switch triode circuit or switch mosfet pipe circuit.
3, buck mu balanced circuit according to claim 2 is characterized in that: described electric energy arrives output terminal B through input end A, resistance R 1, MOSFET pipe Q1 source electrode, drain electrode, is capacitor C 1 charging simultaneously.
4, buck mu balanced circuit according to claim 3 is characterized in that: described control end signal is managed the break-make of Q1 through the conduction and cut-off of resistance R 6 control triode Q2 and then control and the MOSFET in first on-off circuit that the Q2 collector is connected.
5, buck mu balanced circuit according to claim 3, it is characterized in that: described testing circuit comprises parallel connection type three-terminal voltage-stabilizing fiducial chip TL4311, its 1 pin connects described output terminal B, connects self 2 pin by R7 by resistance R 3, its 3 pin is as the input end, connect resistance R 4 simultaneously, and resistance R 4 other ends are signal input part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920052290U CN201392483Y (en) | 2009-03-06 | 2009-03-06 | Voltage reducing type voltage stabilizing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920052290U CN201392483Y (en) | 2009-03-06 | 2009-03-06 | Voltage reducing type voltage stabilizing circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201392483Y true CN201392483Y (en) | 2010-01-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920052290U Expired - Fee Related CN201392483Y (en) | 2009-03-06 | 2009-03-06 | Voltage reducing type voltage stabilizing circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201392483Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101887281A (en) * | 2010-06-29 | 2010-11-17 | 海洋王照明科技股份有限公司 | Current increasing and voltage stabilizing circuit |
| CN103701320A (en) * | 2013-12-14 | 2014-04-02 | 苏州市博得立电源科技有限公司 | Circuit structure for voltage conversion between large-sized voltage battery pack and auxiliary power supply |
-
2009
- 2009-03-06 CN CN200920052290U patent/CN201392483Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101887281A (en) * | 2010-06-29 | 2010-11-17 | 海洋王照明科技股份有限公司 | Current increasing and voltage stabilizing circuit |
| CN103701320A (en) * | 2013-12-14 | 2014-04-02 | 苏州市博得立电源科技有限公司 | Circuit structure for voltage conversion between large-sized voltage battery pack and auxiliary power supply |
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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 |
Granted publication date: 20100127 Termination date: 20140306 |