CN201656777U - Power supply management circuit and electronic equipment therewith - Google Patents
Power supply management circuit and electronic equipment therewith Download PDFInfo
- Publication number
- CN201656777U CN201656777U CN2010203017571U CN201020301757U CN201656777U CN 201656777 U CN201656777 U CN 201656777U CN 2010203017571 U CN2010203017571 U CN 2010203017571U CN 201020301757 U CN201020301757 U CN 201020301757U CN 201656777 U CN201656777 U CN 201656777U
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Abstract
The utility model provides a power supply management circuit comprising a first input terminal, a first output terminal, a second input terminal, a second output terminal, a control circuit and a switch circuit, wherein the first input terminal and the first output terminal are used for receiving and outputting a first power supply signal; the second input terminal and the second output terminal are used for receiving and outputting a second power supply signal; the control circuit is used for outputting a conduction signal by delaying when the electronic equipment is started up and outputting a non-conduction signal when the electronic equipment is shut down; and the switch circuit is connected between the second input terminal and the second output terminal and correspondingly conducted or disconnected according to the conduction signal and the non-conduction signal, thus controlling the second power supply signal to be output later than the outputting of the first power supply signal when the electronic equipment is started up, and controlling the second power supply signal to be stopped outputting prior to the first power supply signal. In the utility model, the power supply management circuit and the electronic equipment therewith can control the conduction and non-conduction time sequence of the working circuit in the electronic equipment, achieves the function of a special power supply management chip, and reduces the product cost.
Description
Technical field
The utility model relates generally to a kind of electric power management circuit and uses its electronic equipment.
Background technology
Along with becoming increasingly abundant of electronic functionalities, the also corresponding increase of the circuit module that it adopts and the type of chip and quantity.Because different circuit module and the required voltage swing differences of chip, so need when electronic equipment start or shutdown, power on or cut off the power supply by certain time sequence.At present, existing electronic equipment adopts special-purpose power management chip that the sequential of a plurality of voltage signals is controlled usually, yet power source special managing chip price is higher, is unfavorable for reducing product cost.
The utility model content
In view of this, need provide a kind of electric power management circuit, be used for controlling powering on and the sequential of cutting off the power supply of electronic equipment operating circuit, replace the power source special managing chip, reduce product cost.
Simultaneously, also need provide a kind of electronic equipment that uses described electric power management circuit.
Electric power management circuit in the utility model execution mode is used to control powering on and the sequential of cutting off the power supply of first power supply signal and second source signal, comprises first input end, first output, second input, second output, control circuit and switching circuit.Wherein, first input end is used to receive described first power supply signal.Second output is used to export described first power supply signal.Second input is used to receive described second source signal.Second output is used to export described second source signal.Control circuit comprises first switch element, second switch element and delay circuit.First switch element is used for time-delay output power on signal when described electronic equipment is started shooting.The second switch element is used for output power-off signal when described electronic equipment shuts down.Delay circuit is used to control the delay time of this first switch element.Switching circuit is connected between described second input and second output, and link to each other with described control circuit simultaneously, be used for powering on and the corresponding conducting of power-off signal or end according to described, thereby control described second source signal and when described electronic equipment is started shooting, be later than described first power supply signal output, and when described electronic equipment shuts down, stop output early than described first power supply signal.
Preferably, described first switch element comprises first triode, and its base stage links to each other with reference voltage through first resistance, and emitter links to each other with described reference voltage, and collector electrode links to each other with described switching circuit to export described power on signal; Described second switch element comprises second triode, and its base stage links to each other with described reference voltage and through second grounding through resistance, emitter links to each other with described first transistor base, and collector electrode links to each other with described switching circuit to export described power-off signal; Described delay circuit comprises electric capacity, is connected between first transistor base and the ground through the 3rd resistance.
Preferably, described electric power management circuit comprises that also reference voltage input terminal is used to receive described reference voltage.
Preferably, described reference voltage is greater than the voltage of first power supply signal.
Preferably, described first triode and second triode are positive-negative-positive.
Preferably, described switching circuit comprises metal oxide semiconductor field effect tube and the 3rd triode.Wherein, the source electrode of metal oxide semiconductor field effect tube links to each other with described second input, and drain electrode links to each other with described second output, and grid links to each other with source electrode through the 4th resistance.The base stage of the 3rd triode links to each other with described first input end, and emitter links to each other with the collector electrode of described first triode and diode and through the 5th grounding through resistance, collector electrode links to each other with the grid of described metal oxide semiconductor field effect tube.
Preferably, described the 3rd triode is the NPN type.
Electronic equipment in the utility model execution mode comprises electric power management circuit, first operating circuit and second operating circuit.Wherein, electric power management circuit is used to control powering on and the sequential of cutting off the power supply of first power supply signal and second source signal, comprises first input end, first output, second input, second output, control circuit and switching circuit.Wherein, first input end is used to receive described first power supply signal.Second output is used to export described first power supply signal.Second input is used to receive described second source signal.Second output is used to export described second source signal.Control circuit comprises first switch element, second switch element and delay circuit.First switch element is used for time-delay output power on signal when described electronic equipment is started shooting.The second switch element is used for output power-off signal when described electronic equipment shuts down.Delay circuit is used to control the delay time of this first switch element.Switching circuit is connected between described second input and second output, be used for powering on and the corresponding conducting of power-off signal or end according to described, thereby control described second source signal and when described electronic equipment is started shooting, be later than described first power supply signal output, and when described electronic equipment shuts down, stop output early than described first power supply signal.
Preferably, described first switch element comprises first triode, and its base stage links to each other with reference voltage through first resistance, and emitter links to each other with described reference voltage, and collector electrode links to each other with described switching circuit to export described power on signal; Described second switch element comprises second triode, and its base stage links to each other with described reference voltage and through second grounding through resistance, emitter links to each other with described first transistor base, and collector electrode links to each other with described switching circuit to export described power-off signal; Described delay circuit comprises electric capacity, is connected between first transistor base and the ground through the 3rd resistance.
Preferably, described electric power management circuit comprises that also reference voltage input terminal is used to receive described reference voltage.
Preferably, described reference voltage is greater than the voltage of first power supply signal.
Preferably, described first triode and second triode are positive-negative-positive.
Preferably, described switching circuit comprises metal oxide semiconductor field effect tube and the 3rd triode.Wherein, the source electrode of metal oxide semiconductor field effect tube links to each other with described second input, and drain electrode links to each other with described second output, and grid links to each other with source electrode through the 4th resistance.The base stage of the 3rd triode links to each other with described first input end, and emitter links to each other with the collector electrode of described first triode and diode and through the 5th grounding through resistance, collector electrode links to each other with the grid of described metal oxide semiconductor field effect tube.
Preferably, described the 3rd triode is the NPN type.
Preferably, described electronic equipment also comprises power circuit, is used to change the external power source signal and exports described first power supply signal and second source signal.
Preferably, described power circuit is also exported the 3rd power supply signal as described reference voltage.
The electric power management circuit that the utility model proposes and use its electronic equipment can effectively be controlled powering on and the sequential of cutting off the power supply of operating circuit in the electronic equipment, has reached the function of power source special managing chip, effectively reduces product cost.
Description of drawings
Fig. 1 has described a kind of execution mode of the electronic equipment that the utility model proposes; And
Fig. 2 has described a kind of execution mode of the electric power management circuit that the utility model proposes.
The main element symbol description
| |
10 |
| |
110 |
| |
120 |
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130 |
| Electric |
140 |
| |
1401 |
| |
1402 |
| |
1403 |
| |
1404 |
| Reference |
1405 |
| |
1406 |
| |
1407 |
| Triode | Q1、Q2、Q3 |
| The metal oxide semiconductcor field effect pipe | Q4 |
| Resistance | R1、R2、R3、R4、R5 |
| Electric capacity | C1 |
Embodiment
Fig. 1 is the schematic diagram of a kind of execution mode of the electronic equipment 10 that the utility model proposes.As shown in Figure 1, electronic equipment 10 comprises power circuit 110, first operating circuit 120, second operating circuit 130 and electric power management circuit 140.Wherein, power circuit 110 is the first power supply signal V1, second source signal V2 and the 3rd power supply signal V3 with the external power source conversion of signals.In the present embodiment, the first power supply signal V1 is used to 120 power supplies of first operating circuit, and second source signal V2 is used to 130 power supplies of second operating circuit, and the 3rd power supply signal V3 is used to electric power management circuit 140 that reference voltage is provided.Wherein, the voltage of the 3rd power supply signal V3 is greater than the voltage of the first power supply signal V1.First operating circuit 120 and second operating circuit 130 are the circuit module or the chip of the realization specific function in the electronic equipment 10, as display circuit, memory circuit or processor etc.Electric power management circuit 140 is connected between power circuit 110 and first operating circuit 120 and second operating circuit 130, is used to manage powering on and cutting off the power supply sequential of first operating circuit 120 and second operating circuit 130.In the present embodiment, when electronic equipment 10 starts, the first power supply signal V1 is earlier that first operating circuit 120 powers on, and second source signal V2 is that second operating circuit 130 powers on again; When electronic equipment 10 shutdown, second source signal V2 is outage earlier, cuts off the power supply behind the first power supply signal V1.
Fig. 2 is the diagrammatic sketch of a kind of execution mode of electric power management circuit 140 in the electronic equipment that the utility model proposes.As shown in Figure 2, electric power management circuit 140 comprises first input end 1401, first output 1402, second input 1403, second output 1404, reference voltage input terminal 1405, control circuit 1406 and switching circuit 1407.Wherein, first input end 1401 is used to receive the first power supply signal V1, and first output 1402 is used to export this first power supply signal V1 to the first operating circuit 120.Second input 1403 is used to receive second source signal V2, and second output 1404 is used to export this second source signal V2 to the second operating circuit 130.Reference voltage input terminal 1405 is used to receive the reference voltage of the 3rd power supply signal V3 as electric power management circuit 140.Control circuit 1406 links to each other with reference voltage input terminal 1405, is used to export power on signal and power-off signal.Switching circuit 1407 is connected between second input 1403 and second output 1404, and according to the correspondingly conducting or end of the power on signal of control circuit 1406 output or power-off signal.
In the present embodiment, when electronic equipment 10 starts, power circuit 110 conversion external power source signals are also exported the first power supply signal V1, second source signal V2 and the 3rd power supply signal V3.Electric power management circuit 140 first input ends 1401 receive the first power supply signal V1, and second input receives second source signal V2, and reference voltage input terminal 1405 receives the 3rd power supply signal V3.First output 1402 exports the first power supply signal V1 to first operating circuit 120 and powers on for it.Capacitor C 1 in the control circuit 1406 receives the 3rd power supply signal V3 and begins charging.At this moment, voltage difference makes triode Q1 conducting greater than conducting voltage between triode Q1 base stage and emitter, its collector electrode output reference voltage.Triode Q4 base stage in the switching circuit 1407 receives the first power supply signal V1, and emitter links to each other with triode Q1 collector electrode in the control circuit 1406 and receives reference voltage.Voltage difference makes triode Q4 end less than conducting voltage between triode Q4 base stage and emitter, ends so metal-oxide-semiconductor field effect transistor Q3 is corresponding.The disconnection that is connected of second input 1403 and 1404 of second outputs, second source signal V2 does not export second operating circuit 130 to.
When capacitor C 1 charging was finished, voltage difference made triode Q1 end less than conducting voltage between triode Q1 base stage and emitter.At this moment, the current collection of triode Q1 is low level very, promptly exports power on signal.The power on signal of triode Q4 emitter reception control circuit 1406 output in the switching circuit 1407, voltage difference makes triode Q4 conducting greater than conducting voltage between triode Q4 base stage and emitter, so the corresponding conducting of metal-oxide-semiconductor field effect transistor Q3.The conducting that is connected of second input 1403 and 1404 of second outputs, second source signal V2 exports second operating circuit 130 to and powers on.In the present embodiment,, can change the charging interval of capacitor C 1, thereby set the time that second source signal V2 time-delay powers on by the capacitance of capacitor C 1 is set.In the present embodiment, power on signal is a low level.
When electronic equipment 10 shutdown, power circuit 110 stops to change the external power source signal, and the voltage of the first power supply signal V1, second source signal V2 and power supply signal V3 begins to drop.At this moment, capacitor C 1 begin the discharge, between triode Q2 base stage in the electric power management circuit 140 and emitter voltage difference greater than conducting voltage, triode Q2 conducting, the discharge voltage of its collector electrode output capacitance C1, i.e. power-off signal.The power-off signal of triode Q4 emitter reception control circuit 1406 outputs in the switching circuit 1407, voltage difference makes triode Q4 end less than conducting voltage between triode Q4 base stage and emitter, ends so metal-oxide-semiconductor field effect transistor Q3 is corresponding.The disconnection that is connected of second input 1403 and 1404 of second outputs, second source signal V2 stops to export to second operating circuit, 130, the second operating circuits 130 and cuts off the power supply immediately.The first power supply signal V1 drops naturally, and first operating circuit 120 cuts off the power supply subsequently.In the present embodiment, power-off signal is a high level.
The electric power management circuit that the utility model proposes and use its electronic equipment, the powering on and the sequential of cutting off the power supply of operating circuit in the may command electronic equipment reached the function of power source special managing chip, reduced product cost.
Claims (10)
1. electric power management circuit is used to control electronic equipment first power supply signal and second source signal electrifying timing sequence when start and the outage sequential during shutdown, it is characterized in that, comprising:
First input end is used to receive described first power supply signal;
First output is used to export described first power supply signal;
Second input is used to receive described second source signal;
Second output is used to export described second source signal;
Control circuit comprises:
First switch element is used for time-delay output power on signal when described electronic equipment is started shooting;
The second switch element is used for output power-off signal when described electronic equipment shuts down; And
Delay circuit is used to control the delay time of this first switch element;
Switching circuit, be connected between described second input and second output, and link to each other with described control circuit simultaneously, be used for powering on and the corresponding conducting of power-off signal or end according to described, thereby control described second source signal and when described electronic equipment is started shooting, be later than described first power supply signal output, and when described electronic equipment shuts down, stop output early than described first power supply signal.
2. electric power management circuit as claimed in claim 1, it is characterized in that described first switch element comprises first triode, its base stage links to each other with reference voltage through first resistance, emitter links to each other with described reference voltage, and collector electrode links to each other with described switching circuit to export described power on signal; Described second switch element comprises second triode, and its base stage links to each other with described reference voltage and through second grounding through resistance, emitter links to each other through described first transistor base, and collector electrode links to each other with described switching circuit to export described power-off signal; Described delay circuit comprises electric capacity, is connected between first transistor base and the ground through the 3rd resistance.
3. electric power management circuit as claimed in claim 2 is characterized in that, described first triode and second triode are positive-negative-positive.
4. electric power management circuit as claimed in claim 2 is characterized in that, also comprises reference voltage input terminal, is used to receive described reference voltage.
5. electric power management circuit as claimed in claim 4 is characterized in that described reference voltage is greater than the voltage of first power supply signal.
6. electric power management circuit as claimed in claim 1 is characterized in that, described switching circuit comprises:
Metal oxide semiconductor field effect tube, its source electrode links to each other with described second input, and drain electrode links to each other with described second output, and grid links to each other with described source electrode through the 4th resistance; And
The 3rd triode, its base stage links to each other with described first input end, and emitter links to each other with the collector electrode of described first triode and second triode and through the 5th grounding through resistance, collector electrode links to each other with the grid of described metal oxide semiconductor field effect tube.
7. electric power management circuit as claimed in claim 6 is characterized in that, described the 3rd triode is the NPN type.
8. an electronic equipment is characterized in that, comprising:
As any described electric power management circuit of claim 1 to 7, be used to control described electronic equipment first power supply signal and second source signal electrifying timing sequence when start and the outage sequential during shutdown;
First operating circuit is connected in described first output to receive described first power supply signal; And
Second operating circuit is connected in described second output to receive described second source signal.
9. electronic equipment as claimed in claim 8 is characterized in that, also comprises power circuit, is used to change the external power source signal and exports described first power supply signal and second source signal.
10. electronic equipment as claimed in claim 9 is characterized in that, described power circuit is also exported the 3rd power supply signal as described reference voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010203017571U CN201656777U (en) | 2010-01-28 | 2010-01-28 | Power supply management circuit and electronic equipment therewith |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010203017571U CN201656777U (en) | 2010-01-28 | 2010-01-28 | Power supply management circuit and electronic equipment therewith |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201656777U true CN201656777U (en) | 2010-11-24 |
Family
ID=43122007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010203017571U Expired - Fee Related CN201656777U (en) | 2010-01-28 | 2010-01-28 | Power supply management circuit and electronic equipment therewith |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201656777U (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103261991A (en) * | 2010-12-17 | 2013-08-21 | 德克萨斯仪器股份有限公司 | Analog power sequencer and method |
| CN103676674A (en) * | 2012-09-04 | 2014-03-26 | 鸿富锦精密工业（深圳）有限公司 | Timing sequence control circuit and electronic device adopting same |
| CN108321765A (en) * | 2017-01-17 | 2018-07-24 | 深圳市瑞必达科技有限公司 | A kind of massage seat and its supply unit |
| CN108446204A (en) * | 2018-03-30 | 2018-08-24 | 联想(北京)有限公司 | A kind of chip and electronic equipment |
| CN109215562A (en) * | 2018-11-23 | 2019-01-15 | 京东方科技集团股份有限公司 | A kind of display driver circuit and display driving method |
| CN110502092A (en) * | 2019-07-17 | 2019-11-26 | 闻泰科技(无锡)有限公司 | Power supply circuit and electronic equipment |
| CN111835189A (en) * | 2019-04-18 | 2020-10-27 | 纬创资通股份有限公司 | Power supply generating device with remote control self-recovery power-off mechanism |
| CN112671273A (en) * | 2019-10-16 | 2021-04-16 | 美的威灵电机技术（上海）有限公司 | Switch circuit, motor control system and dust catcher |
| CN113285601A (en) * | 2020-02-19 | 2021-08-20 | 北京小米移动软件有限公司 | Main power circuit and charger |
-
2010
- 2010-01-28 CN CN2010203017571U patent/CN201656777U/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103261991A (en) * | 2010-12-17 | 2013-08-21 | 德克萨斯仪器股份有限公司 | Analog power sequencer and method |
| CN103261991B (en) * | 2010-12-17 | 2015-12-09 | 德克萨斯仪器股份有限公司 | Simulation electric power sequencer and method |
| CN103676674A (en) * | 2012-09-04 | 2014-03-26 | 鸿富锦精密工业（深圳）有限公司 | Timing sequence control circuit and electronic device adopting same |
| CN108321765B (en) * | 2017-01-17 | 2019-11-15 | 深圳市瑞必达科技有限公司 | A kind of massage seat and its power supply device |
| CN108321765A (en) * | 2017-01-17 | 2018-07-24 | 深圳市瑞必达科技有限公司 | A kind of massage seat and its supply unit |
| CN108446204A (en) * | 2018-03-30 | 2018-08-24 | 联想(北京)有限公司 | A kind of chip and electronic equipment |
| CN108446204B (en) * | 2018-03-30 | 2021-09-14 | 联想(北京)有限公司 | Chip and electronic equipment |
| CN109215562A (en) * | 2018-11-23 | 2019-01-15 | 京东方科技集团股份有限公司 | A kind of display driver circuit and display driving method |
| CN111835189A (en) * | 2019-04-18 | 2020-10-27 | 纬创资通股份有限公司 | Power supply generating device with remote control self-recovery power-off mechanism |
| CN110502092A (en) * | 2019-07-17 | 2019-11-26 | 闻泰科技(无锡)有限公司 | Power supply circuit and electronic equipment |
| CN110502092B (en) * | 2019-07-17 | 2023-11-24 | 闻泰科技(无锡)有限公司 | Power supply circuit and electronic equipment |
| CN112671273A (en) * | 2019-10-16 | 2021-04-16 | 美的威灵电机技术（上海）有限公司 | Switch circuit, motor control system and dust catcher |
| CN113285601A (en) * | 2020-02-19 | 2021-08-20 | 北京小米移动软件有限公司 | Main power circuit and charger |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101124 Termination date: 20140128 |