CN204794147U - Low -power consumption power control circuit - Google Patents
Low -power consumption power control circuit Download PDFInfo
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- CN204794147U CN204794147U CN201520372922.5U CN201520372922U CN204794147U CN 204794147 U CN204794147 U CN 204794147U CN 201520372922 U CN201520372922 U CN 201520372922U CN 204794147 U CN204794147 U CN 204794147U
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- 230000005611 electricity Effects 0.000 description 2
- 238000004078 waterproofing Methods 0.000 description 2
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Abstract
The utility model discloses a low -power consumption power control circuit belongs to control circuit technical field. The problem of current low -power consumption circuit control means cost is on the high side, the result of use is not good is solved. The utility model discloses a low -power consumption power control circuit, including power module, main control chip, switch element and voltage stabilizing module, voltage stabilizing module includes first steady voltage chip and second steady voltage chip, power module's positive terminal is connected respectively to the input of first steady voltage chip and the input of second steady voltage chip, main control chip is connected respectively to the output of first steady voltage chip and the output of second steady voltage chip, switch element connect the messenger of second steady voltage chip can hold and power module's positive terminal between, main control chip can hold the break -make of controlling first steady voltage chip through the messenger of first steady voltage chip. The embodiment of the utility model provides a mainly be applied to hand -held type equipment, for example hand -held type scanner, hand -held type detector and so on.
Description
[technical field]
The utility model relates to a kind of low-power dissipation power supply control circuit, belongs to control circuit technical field.
[background technology]
Some portable equipments in the market need to be equipped with battery usually, think circuit supply, power supply due to battery needs manual operation to open or cuts off, user is after a procedure because cut-out battery supply is easily forgotten in negligence, electricity is caused to waste, because the electricity of battery is limited, often replacing battery brings to user and bothers more greatly.Though disclose multiple low consumption circuit control device in prior art, most high expensive, and result of use is not good.
[utility model content]
Technical problem to be solved in the utility model is to overcome the deficiencies in the prior art and provides a kind of low-power dissipation power supply control circuit,
Solve the problems of the technologies described above, the utility model adopts following technical scheme:
A kind of low-power dissipation power supply control circuit, comprise power module, main control chip, switch element and Voltage stabilizing module, described Voltage stabilizing module comprises the first voltage stabilizing chip and the second voltage stabilizing chip, input and the input of the second voltage stabilizing chip of described first voltage stabilizing chip are connected the positive terminal of power module respectively, the output of described first voltage stabilizing chip is connected main control chip respectively with the output of the second voltage stabilizing chip, between the Enable Pin that described switch element is connected to the second voltage stabilizing chip and the positive terminal of power module, described main control chip controls the break-make of the first voltage stabilizing chip by the Enable Pin of the first voltage stabilizing chip.
Low-power dissipation power supply control circuit of the present utility model, first voltage stabilizing chip and the second voltage stabilizing chip are set, first voltage stabilizing chip and the second voltage stabilizing chip all have Enable Pin, when after turn on-switch element, the Enable Pin of the second voltage stabilizing chip is high level, second voltage stabilizing chip is that main control chip is powered, after main control chip powers on, the Enable Pin of the first voltage stabilizing chip is high level, the first voltage stabilizing chip is made to be main control chip continued power, after switch element disconnects, main control chip can control the break-make of the first voltage stabilizing chip according to demand.The first voltage stabilizing chip that this circuit is used and the second voltage stabilizing chip market price lower, the design cost of circuit can be reduced thus, and adopt two voltage stabilizing chips can ensure that the output voltage of circuit is target voltage, can not pressure drop be there is, to ensure the result of use of equipment.
First specific embodiments of the present utility model, disconnects after described switching elements ON, and described main control chip controls the first voltage stabilizing chip time delay disconnection by the Enable Pin of the first voltage stabilizing chip.In other words, when main control chip detects that equipment did not operate in a period of time, automatically the first voltage stabilizing chip is disconnected, namely cut off battery supply supply, solve user and cut off battery supply and a difficult problem that the battery power that causes wastes because forgetting.
Second specific embodiments of the present utility model, the I/O interface of described main control chip is connected with one end of switch element, for sense switch element movement.Design like this, can reach the object of multi-functional PTT, and the switch element that only need one are common can realize.
3rd specific embodiments of the present utility model, the positive terminal of described power module is connected with buck diode.Reduce the voltage being input to the first voltage stabilizing chip input and the second voltage stabilizing chip input, protect the first voltage stabilizing chip and the second voltage stabilizing chip.
4th specific embodiments of the present utility model, is connected with the first voltage stabilizing didoe between the input of described first voltage stabilizing chip and earth terminal.Prevent the voltage overshoot that powers on, even if also can meet the demands more than in the first voltage stabilizing chip ceiling voltage certain limit at supply voltage.
5th specific embodiments of the present utility model, is connected with the second voltage stabilizing didoe between the input of described second voltage stabilizing chip and earth terminal.Prevent the voltage overshoot that powers on, even if also can meet the demands more than in the second voltage stabilizing chip ceiling voltage certain limit at supply voltage.
6th specific embodiments of the present utility model, described switch element is touch-switch.Light-touch switch construction is simple, is easy to waterproofing design,
7th specific embodiments of the present utility model, described first voltage stabilizing chip and/or the second voltage stabilizing chip are LDO chip.LDO is low pressure difference linear voltage regulator, and for traditional linear voltage regulator comes, the requirement of LDO to operating voltage is lower, reduces circuit design requirements.
8th specific embodiments of the present utility model, the break-make that described switch element carries out circuit according to main control chip setting controls and/or function selection.
These features of the present utility model and advantage will embodiment below, exposure detailed in accompanying drawing.
[accompanying drawing explanation]
Below in conjunction with accompanying drawing, the utility model is described further:
Fig. 1 is the theory diagram of power control circuit in the utility model preferred embodiment;
Fig. 2 is the circuit theory diagrams of power control circuit in the utility model preferred embodiment;
Fig. 3 is the structural representation of main control chip in the utility model preferred embodiment.
[embodiment]
The technical scheme of accompanying drawing to the utility model embodiment below in conjunction with the utility model embodiment is explained and illustrated, but following embodiment is only preferred embodiment of the present utility model, and not all.Based on the embodiment in execution mode, those skilled in the art under the prerequisite not making creative work obtain other embodiments, all belong to protection range of the present utility model.
With reference to Fig. 1-3, the low-power dissipation power supply control circuit of the utility model preferred embodiment, comprise power module 1, main control chip 5, switch element 2 and Voltage stabilizing module, wherein, Voltage stabilizing module comprises the first voltage stabilizing chip 3 and the second voltage stabilizing chip 4, input IN and the input IN of the second voltage stabilizing chip 4 of the first voltage stabilizing chip 3 are connected the positive terminal of power module 1 respectively, output end vo ut and the output end vo ut of the second voltage stabilizing chip 4 of the first voltage stabilizing chip 3 are connected the vdd terminal of main control chip 5 respectively, between the Enable Pin EN that switch element 2 is connected to the second voltage stabilizing chip 4 and the positive terminal of power module 1, main control chip 5 controls the break-make of the first voltage stabilizing chip 3 by the Enable Pin EN of the first voltage stabilizing chip 3.
Theory diagram shown in composition graphs 1 is understood that after switch element 2 is connected, draw high the Enable Pin EN voltage of the second voltage stabilizing chip 4, make it as high level, second voltage stabilizing chip 4 conducting is also powered for main control chip 5, after main control chip 5 powers on, draw high the Enable Pin EN voltage of the first voltage stabilizing chip 3, make it as high level, first voltage stabilizing chip 3 conducting is also main control chip 5 continued power, and now switch element 2 has disconnected, main control chip 5 controls the first voltage stabilizing chip 3 time delay disconnection by the Enable Pin of the first voltage stabilizing chip 3, when main control chip 5 detects that equipment did not operate in a period of time, automatically the first voltage stabilizing chip 3 is disconnected, namely battery supply supply has been cut off, such as: the time delay opening time of main control chip 5 inner setting 10 ~ 20s, if when main control chip 5 detects that equipment does not operate within this time period, control the first voltage stabilizing chip 3 by the Enable Pin EN of the first voltage stabilizing chip 3 to disconnect, cut off circuit supply, equipment just enters power down standby mode, so just can solve user and cut off battery supply and a difficult problem that the battery power that causes wastes because forgetting.Adopt the program, the power consumption of equipment under power down standby mode can reach 10nA rank.
Compared to existing technology, some adopt the low consumption circuit of single-chip microcomputer and triode combination, the scheme of the present embodiment adopts two voltage stabilizing chips to ensure, and the output voltage of circuit is target voltage, can not pressure drop be there is, thus the result of use of the equipment of guarantee, and cost is also lower.
The first voltage stabilizing chip 3 that the present embodiment is used and the second voltage stabilizing chip 4 are LDO chip, and LDO is low pressure difference linear voltage regulator, and for traditional linear voltage regulator comes, the requirement of LDO to operating voltage is lower, reduce circuit design requirements.In other embodiments, also can be both the first voltage stabilizing chip and the second voltage stabilizing chip one of them adopt LDO chip, another adopts conventional voltage stabilizing chip.
For improving the practicality of circuit, one of them I/O interface of main control chip 5 is connected with one end of switch element 2 by the present embodiment, for sense switch element 2 action, as shown in Figure 2, button detects pin key_down and is connected with the I/O interface PB5/AN5 of main control chip 5, main control chip 5 carrys out the action of sense switch element 2 by I/O interface, the break-make that switch element 2 carries out circuit according to main control chip 5 setting controls and function selection, the switch element 2 of the present embodiment adopts touch-switch, this kind of switch is generally normally open, during use with the condition meeting operating physical force to switching manipulation pressuring direction with conducting, when cancelling pressure, switch disconnects, during practical application, assuming that device therefor has the first function and the second function, can connect and be switched to the first function in 3 seconds by configuration switch element 2 in main control chip 5, switch element 2 is connected and is switched to the second function in 5 seconds, the break-make of the routine operation of switch element 2 then realizing circuit controls, such as: at once unclamp after pressing switch element 2, according to aforementioned schemes, the first voltage stabilizing chip 3 conducting is now also main control chip 5 continued power, operator presses long for switch element 23 seconds, the I/O interface of main control chip 5 detects this information, equipment is made to be switched to the first function according to setting in advance, if operator is by long for switch element 2 by 5 seconds, the I/O interface of main control chip 5 detects this information, makes equipment be switched to the second function according to setting in advance, if operator unclamps after again pressing switch element 2 at once, the I/O interface of main control chip 5 detects this information, is disconnected by the first voltage stabilizing chip 3 according to setting in advance, cuts off battery supply supply.Design like this, a common touch-switch is only needed realizing circuit break-make to control and function selection, reach the object of multi-functional PTT, and equipment does not need arrange other function buttons again, can simplified structure, be convenient to waterproofing design, traditional mode then needs to arrange break-make fixed mode switch and carrys out realizing circuit break-make and control, such as toggle switch and self-lock switch, this type of construction of switch designs complicated and not easily realizes water-tight.
According to the principle of scheme described above, it may occur to persons skilled in the art that, by the motion detection of main control chip 5 pairs of switch elements 2, more function can be extended to and select.Also other mechanical touch switch functionally similar with touch-switch can be adopted in prior art at other embodiment breaker in middle elements of the present utility model.
Certainly, according to the difference of designing requirement, in other embodiments of the present utility model, switch element only can carry out the break-make control of circuit according to main control chip setting, carry out practical function select by other function buttons; Or switch element only carries out function selection according to main control chip setting, and the break-make being carried out realizing circuit by other switches controls.
For improving the reliability of power control circuit; the present embodiment to be connected a buck diode 6 at the positive terminal of power module 1; reduce the voltage being input to the first voltage stabilizing chip 3 input IN and the second voltage stabilizing chip 4 input IN, protect the first voltage stabilizing chip 3 and the second voltage stabilizing chip 4.If but supply voltage is in the withstand voltage scope of the first voltage stabilizing chip 3 and the second voltage stabilizing chip 4, just carrys out step-down without the need to increasing buck diode.In other embodiments, buck diode also can replace with elements such as resistance.
The first voltage stabilizing didoe 8 is connected with between the input IN and earth terminal GND of above-mentioned first voltage stabilizing chip 3, prevent from connecting moment at switch element 2, power on voltage overshoot, even if also can meet the demands more than in the first voltage stabilizing chip 3 ceiling voltage certain limit at supply voltage.The second voltage stabilizing didoe 7 is connected with between the input IN and earth terminal GND of above-mentioned second voltage stabilizing chip 4, in like manner, prevent from connecting moment at switch element 2, power on voltage overshoot, even if also can meet the demands more than in the second voltage stabilizing chip 4 ceiling voltage certain limit at supply voltage.If supply voltage is eligible, just without the need to increasing the first voltage stabilizing didoe and the second voltage stabilizing didoe.
The utility model embodiment is mainly used in portable equipment, such as hand-held scanner, hand-held detector etc.
The above; be only embodiment of the present utility model; but protection range of the present utility model is not limited thereto, is familiar with this those skilled in the art and should be understood that the content that the utility model includes but not limited to accompanying drawing and describes in embodiment above.Any amendment not departing from function and structure principle of the present utility model all will comprise within the scope of the appended claims.
Claims (9)
1. a low-power dissipation power supply control circuit, comprise power module, main control chip, switch element and Voltage stabilizing module, it is characterized in that: described Voltage stabilizing module comprises the first voltage stabilizing chip and the second voltage stabilizing chip, input and the input of the second voltage stabilizing chip of described first voltage stabilizing chip are connected the positive terminal of power module respectively, the output of described first voltage stabilizing chip is connected main control chip respectively with the output of the second voltage stabilizing chip, between the Enable Pin that described switch element is connected to the second voltage stabilizing chip and the positive terminal of power module, described main control chip controls the break-make of the first voltage stabilizing chip by the Enable Pin of the first voltage stabilizing chip.
2. low-power dissipation power supply control circuit as claimed in claim 1, is characterized in that: disconnect after described switching elements ON, and described main control chip controls the first voltage stabilizing chip time delay disconnection by the Enable Pin of the first voltage stabilizing chip.
3. low-power dissipation power supply control circuit as claimed in claim 1 or 2, is characterized in that: the I/O interface of described main control chip is connected with one end of switch element, for sense switch element movement.
4. low-power dissipation power supply control circuit as claimed in claim 1, is characterized in that: the positive terminal of described power module is connected with buck diode.
5. low-power dissipation power supply control circuit as claimed in claim 1, is characterized in that: be connected with the first voltage stabilizing didoe between the input of described first voltage stabilizing chip and earth terminal.
6. low-power dissipation power supply control circuit as claimed in claim 1, is characterized in that: be connected with the second voltage stabilizing didoe between the input of described second voltage stabilizing chip and earth terminal.
7. low-power dissipation power supply control circuit as claimed in claim 1, is characterized in that: described switch element is touch-switch.
8. low-power dissipation power supply control circuit as claimed in claim 1, is characterized in that: described first voltage stabilizing chip and/or the second voltage stabilizing chip are LDO chip.
9. the low-power dissipation power supply control circuit as described in one of claim 4 to 7, is characterized in that: the break-make that described switch element carries out circuit according to main control chip setting controls and/or function selection.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520372922.5U CN204794147U (en) | 2015-06-03 | 2015-06-03 | Low -power consumption power control circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520372922.5U CN204794147U (en) | 2015-06-03 | 2015-06-03 | Low -power consumption power control circuit |
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| CN204794147U true CN204794147U (en) | 2015-11-18 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107508342A (en) * | 2017-08-14 | 2017-12-22 | 惠州市蓝微电子有限公司 | A kind of lithium battery MCU power supply protection circuits |
| CN112486072A (en) * | 2020-12-02 | 2021-03-12 | 郑州嘉晨电器有限公司 | Low-power-consumption starting circuit |
-
2015
- 2015-06-03 CN CN201520372922.5U patent/CN204794147U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107508342A (en) * | 2017-08-14 | 2017-12-22 | 惠州市蓝微电子有限公司 | A kind of lithium battery MCU power supply protection circuits |
| CN112486072A (en) * | 2020-12-02 | 2021-03-12 | 郑州嘉晨电器有限公司 | Low-power-consumption starting circuit |
| CN112486072B (en) * | 2020-12-02 | 2022-02-25 | 河南嘉晨智能控制股份有限公司 | Low-power-consumption starting circuit |
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