CN101083400A - Power supply device of an electronic device - Google Patents
Power supply device of an electronic device Download PDFInfo
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- CN101083400A CN101083400A CN 200710103259 CN200710103259A CN101083400A CN 101083400 A CN101083400 A CN 101083400A CN 200710103259 CN200710103259 CN 200710103259 CN 200710103259 A CN200710103259 A CN 200710103259A CN 101083400 A CN101083400 A CN 101083400A
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Abstract
A power supply device comprises a DC supply output module, to output a DC supply; a DC supply conversion module, coupling to the DC supply output module and to adjust the pressure of the DC supply; a diode, including a input end which coupling to the output end of the DC supply conversion module, and a output end; an charge memory module, coupling to the output end of the diode, and to store charge.
Description
Technical field
The present invention relates to a kind of power supply device that is used for an electronic installation, particularly relate to a kind of power supply device that reduces production costs and strengthen the electrostatic discharge (ESD) protection ability.
Background technology
Along with development of science and technology, the function of electronic installation is more and more.In order to keep the proper operation of electronic installation, when electronic installation just in use or when being switched off power supply, some assembly of electronic installation is essential to continue running.Therefore, electronic installation must comprise a power supply device, when being used to electronic installation and being switched off power supply, provides power supply to the assembly that needs to continue running.For instance, in information products such as computer system, digital camera, TV, when shutting down or not having external power supply, battery meeting out-put supply to a time set, clock-generating device in the time of strictly according to the facts (Real Time Clock) is to keep the data (as BIOS) that are stored in the storage chip.Though the power supply that real-time clock generation device or storage chip are consumed seldom, along with the time increases, battery can not have electricity eventually, causes being stored in situations such as data loss in the storage chip, timing error at last.In order to address the above problem, prior art provides a kind of power supply device, and it is to utilize rechargeable battery to provide power supply to the assembly that needs to continue running.
Please refer to Fig. 1, Fig. 1 is the existing schematic diagram that is used for a power supply device 10 of an electronic installation.Power supply device 10 is in order to provide timing and the memory cell 120 in power supply to a chip 118 and the chip 118, and it includes a direct current power supply slot 100, a battery insertion groove 102, a power supply switch circuit 104, a boost type DC to DC voltage converting circuit 106, a switching circuit 108, diode 110,112, a resistance 114 and a rechargeable battery 116.DC power supply slot 100 can plug an out splice going splice that exchanges direct current transducer (not being plotted among Fig. 1), and battery insertion groove 102 can plug a battery.The power supply of power supply switch circuit 104 changeable DC power supply slots 100 or battery insertion groove 102 to boost type DC to DC voltage converting circuit 106 and diode 112, after then boost type DC promotes the voltage of DC power supply to DC voltage converting circuit 106, be sent to switching circuit 108.Switching circuit 108 can be opened when electronic installation starts, be supplied to chip 118 and diode 110 with the power supply that boost type DC is exported DC voltage converting circuit 106, thereby carry out relevant running and (and provide higher voltage, increase the stored electric charge of rechargeable battery 116, to prolong the running time of timing and memory cell); And when electronic installation shuts down, close, to save the consumption of electric power.Diode 110,112 is the one-way fashion switch, and when the voltage of its input during greater than the voltage of output, diode 110,112 is opened, and providing power supply to timing and memory cell 120, and charges by 114 pairs of rechargeable batteries 116 of resistance.Therefore, (DC power supply slot 100 is inserted with the out splice going splice of interchange to direct current transducer when power supply device 10 has external power supply, or battery insertion groove 102 is inserted with battery), power supply switch circuit 104 via diode 112 out-put supplies to timing and memory cell 120, and to rechargeable battery 116 charging.On the contrary, when power supply device 10 did not have external power supply, rechargeable battery 116 can be exported stored power supply, provides to timing and memory cell 120 by resistance 114, to keep the lasting running of timing and memory cell 120.Because diode 110,112 is all the one-way fashion switch, therefore the power supply that can avoid rechargeable battery 116 to be exported is sent to switching circuit 108 or power supply switch circuit 104.In other words, no matter whether electronic installation is just in use or be switched off power supply, timing and memory cell 120 all can receive the required power supply of running.In addition, because rechargeable battery 116 can charge when power supply device 10 has external power supply, so the user need not worry dead battery and cause being stored in situation generations such as data losss in the storage chip, timing error.
In other words, by power supply device 10, no matter whether electronic installation is in use or be shut down, timing and memory cell 120 sustainable runnings, and, just need not worry that rechargeable battery 116 does not have as long as external power supply is plugged in good time.Yet shown in a path 122 among Fig. 1, when external power supply, the power supply that power supply switch circuit 104 is exported not only can also can directly be sent to power supply timing and memory cell 120 via path 122 by 116 chargings of 112 pairs of rechargeable batteries of diode.Generally speaking, the clocking capability of timing and memory cell 120 is made of unit such as oscillator, comparator, counters, accurate, accurate more more timing and memory cell 120, its circuit complexity is high more, number of components is many more, also be vulnerable to simultaneously static discharge (Electrostatic Discharge, influence ESD).In Fig. 1, when external power supply, power supply switch circuit 104 directly is sent to power supply timing and memory cell 120 via path 122.In other words, timing and memory cell 120 to 104 of power supply switch circuits form signal transmission or electrostatic discharging path, when causing high-frequency noise in the environment or static and the running of memory cell 120, may cause the time inaccurate, even be made zero via path 122 interferometers.So-called static discharge effect is to cause electronic building brick or electronic installation to be subjected to the electrical stress (ElectricalOverstress of transition, EOS) main cause of Po Huaiing, this destruction can cause semiconductor subassembly to form nonvolatil destruction main cause, and then influence integrated circuit (Integrated Circuit, circuit function IC).The reason that the electrical stress of transition produces be because electronic building brick or device make, produce, assemble, test, deposit, in the process of carrying etc., static can be accumulated in human body, instrument, store equipment in, even also can accumulate static at electronic building brick itself, when these objects are in contact with one another, can form a discharge path, thereby cause the breaking-up of electronic building brick or electronic installation.
In other words, existing power supply feeding mechanism 10 may be subjected to the influence of static discharge, causes the time inaccurate, even is made zero, thereby influence the operation of electronic installation.
Summary of the invention
Therefore, main purpose of the present invention provides a kind of power supply device that is used for an electronic installation.
The present invention discloses a kind of power supply device that is used for an electronic installation, include a direct current power supply output module, in order to export a direct current power supply; One direct current power transfer module is coupled to this DC power supply output module, in order to adjust the voltage of this DC power supply; One diode includes the output that an input is coupled to this DC power supply modular converter, and an output; And a Charge Storage module, be coupled to the output of this diode, in order to store charge.
Description of drawings
Fig. 1 is the existing schematic diagram that is used for a power supply device of an electronic installation.
Fig. 2 is used for the schematic diagram of the power supply device of an electronic installation for one embodiment of the invention.
Fig. 3 is the schematic diagram of existing boost type DC to dc voltage changer.
Fig. 4 is the schematic diagram of the boost type DC of Fig. 3 to the control circuit of dc voltage changer.
Fig. 5 is the schematic diagram of existing buck direct current to dc voltage changer.
Fig. 6 is used for the schematic diagram of the power supply device of an electronic installation for one embodiment of the invention.
The reference numeral explanation
10,20,60 power supply devices
100,600 DC power supply slots
102,602 battery insertion grooves
104,604 power supply switch circuits
106,606 boost type DCs are to DC voltage converting circuit
108 switching circuits
110,112,204,306,608 diodes
114,612, R1, R2 resistance
116,614 rechargeable batteries
122 paths
200 DC power supply output modules
202 DC power supply modular converters
206 Charge Storage modules
208 switch elements
210 first load units
212 second load units
30 boost type DCs are to dc voltage changer
300 power supplys
302 inductance
304 switching transistors
308 control circuits
310 electric capacity
312 load resistances
402 comparison circuits
404 reference voltage generators
406 oscillators
50 buck direct currents are to dc voltage changer
118,616 chips
120,618 timing and memory cell
610 switch elements
Vfb, Vout, Vin, Vref voltage
The Vext controlling signal
Vcom is signal relatively
Embodiment
Please refer to Fig. 2, Fig. 2 is used for the schematic diagram of the power supply device 20 of an electronic installation for one embodiment of the invention.Power supply device 20 can be strengthened the electrostatic discharge (ESD) protection ability, and it includes a direct current power supply output module 200, a direct current power transfer module 202, a diode 204, a Charge Storage module 206.DC power supply output module 200 in order to the output DC source to DC power supply modular converter 202, after DC power supply modular converter 202 can promote the voltage of the DC power supply that received or is reduced to a predeterminated voltage value, export Charge Storage module 206 to by diode 204.But Charge Storage module 206 store charges, and stored electric charge can be exported to the assembly that one first load unit, 210, the first load units 210 can be essential lasting runnings such as real-time clock generation (Real Time Clock) module, a storage module.In addition, preferably, DC power supply modular converter 202 can be the compute chip, microprocessor etc. of electronic installation by a switch element 208 out-put supplies to one second load unit 212, the second load units 212.When switch element 208 is opened in electronic installation, form the current path of 212 of the DC power supply modular converter 202 and second load units, to start second load unit 212.In other words, first load unit 210 is the module that need to continue running in the electronic installation, and second load unit 212 then is the electronic installation module that Shi Caixu starts that comes into operation.
By power supply device 20, no matter whether electronic installation is unlocked, when DC power supply output module 200 out-put supplies, DC power supply modular converter 202 can improve or the voltage of the DC power supply that reduction DC power supply output module 200 is exported, and via diode 204 electric current is sent to the Charge Storage module 206 and first load unit 210.When DC power supply output module 200 fails, the voltage of the input of diode 204 is less than the voltage of output, make diode 204 close, then Charge Storage module 206 stored electric charges can be sent to first load unit 210, to keep the normal operation of first load unit 210.In other words, when DC power supply output module 200 out-put supplies, the electric current that DC power supply output module 200 is exported can be sent to first load unit 210 through DC power supply modular converter 202 and diode 204.Because include coupling assemblies such as electric capacity, inductance in the DC power supply modular converter 202, the effect of this class coupling assembly is similar to filter, can absorb or offset the current impulse that noise or static discharge produce.Therefore, by the protection of DC power supply modular converter 202, first load unit 210 can not be subjected to the influence of static discharge, with protection assembly wherein.
What pay special attention to is that the circuit of DC power supply modular converter 202 is also unrestricted, as long as can change the voltage of DC power supply.For instance, please refer to Fig. 3, Fig. 3 is the schematic diagram of an existing boost type DC to dc voltage changer 30.Boost type DC includes a power supply 300, an inductance 302, a switching transistor 304, a diode 306, a control circuit 308, an electric capacity 310 and a load resistance 312 to dc voltage changer 30.Control circuit 308 is according to the unlatching of the output voltage control switch transistor 304 of diode 306 or close, be promoted to suitable magnitude of voltage with voltage Vin with power supply 300 after, be output as voltage Vout by diode 306.When switching transistor 304 conductings, diode 306 bears reverse bias and blocks conducting, makes 300 pairs of inductance 302 energy storage of power supply.In case switching transistor 304 cuts out, then inductance 302 can the opposite voltage of polarization.In other words, when switching transistor 304 conductings, 300 pairs of inductance 302 storage power of power supply, and when switching transistor 304 cuts out, then the energy in the inductance 302 is transplanted on electric capacity 310 and load resistance 312 by diode 306.Please continue with reference to figure 4, Fig. 4 is the schematic diagram of boost type DC to the control circuit 308 of dc voltage changer 30.Control circuit 308 includes a comparison circuit 402, a reference voltage generator 404, an oscillator 406 and resistance R 1, R2.The combination of resistance R 1, R2 is a bleeder circuit, is used for the output voltage V out of diode 306 is converted to voltage Vfb to comparison circuit 402.Comparison circuit 402 can compare the reference voltage Vref of voltage Vfb and reference voltage generator 404 outputs.Oscillator 406 can be pulse width modulation oscillator, pulse frequency modulated oscillator or ring oscillator etc., and in order to the comparison signal Vcom that is exported according to comparison circuit 402, output controlling signal Vext is with control switch transistor 304.When voltage Vout was lower than target voltage, voltage Vfb was less than voltage Vref, and relatively signal Vcom is high state and activation oscillator 406, with the conducting of diverter switch transistor 404 with close.On the contrary, when voltage Vout was higher than target voltage, voltage Vfb was higher than voltage Vref, and relatively signal Vcom is low state and closes endless loop shape oscillator, with off switch transistor 404.
In addition, please refer to Fig. 5, Fig. 5 is the schematic diagram of an existing buck direct current to dc voltage changer 50.The buck direct current to the function mode of dc voltage changer 50 and control circuit thereof all similar in appearance to boost type DC to dc voltage changer 30, known by industry, do not give unnecessary details at this.
By Fig. 3 and Fig. 5 as can be known, boost type and buck direct current are in the dc voltage changer 30,50, input to and all comprise coupling assemblies such as electric capacity, inductance between output, can be used to absorb or offset the current impulse that noise or static discharge produce, thereby can prevent that static discharge from causing damage to first load unit 120.Except that this, in Fig. 2, DC power supply output module 200 is used to provide DC power supply, and it can plug an out splice going splice that exchanges direct current transducer by a direct current power supply slot, or plugs a battery by a battery insertion groove, thereby DC power supply is provided.On the other hand, Charge Storage module 206 can be a rechargeable battery, in order to store charge, and out-put supply to the first load unit 120.
Further, please refer to Fig. 6, Fig. 6 is used for the schematic diagram of the power supply device 60 of an electronic installation for one embodiment of the invention.Power supply device 60 is in order to provide timing and the memory cell 618 in power supply to a chip 616 and the chip 616, and it includes a direct current power supply slot 600, a battery insertion groove 602, a power supply switch circuit 604, a boost type DC to DC voltage converting circuit 606, a diode 608, a switch element 610, a resistance 612 and a rechargeable battery 614.DC power supply slot 600 can plug an out splice going splice that exchanges direct current transducer (not being plotted among Fig. 1), and battery insertion groove 602 can plug a battery.The power supply of power supply switch circuit 604 changeable DC power supply slots 600 or battery insertion groove 602 to boost type DC to DC voltage converting circuit 606, after DC voltage converting circuit 606 being promoted the voltage of DC power supply, be sent to diode 608 and switch element 610 by boost type DC.In this example, boost type DC is similar to dc voltage changer 30 to boost type DC shown in Figure 3 to the function mode of DC voltage converting circuit 606, and only boost type DC is to realize diode 306 with a metal-oxide semiconductor transistor to DC voltage converting circuit 606.Switch element 610 can be opened when electronic installation starts, and is supplied to chip 616 with the power supply that boost type DC is exported DC voltage converting circuit 606, thereby carries out relevant running; And when shutting down, electronic installation closes, to save the consumption of electric power, and when electronic installation shuts down, (diode 306 among Fig. 3 by boost circuit structure, or boost type DC is to DC voltage converting circuit 606 among Fig. 6, and it is with a metal oxide semiconductor transistor organizator diode (Body Diode)) produce a charge circuit and charge by diode 608 and by 612 pairs of rechargeable batteries 614 of resistance.Diode 608 is the one-way fashion switch, and when the voltage of its input during greater than the voltage of output, diode 608 can be opened, and providing power supply to timing and memory cell 618, and charges by 612 pairs of rechargeable batteries 614 of resistance.Therefore, (DC power supply slot 600 is inserted with the out splice going splice of interchange to direct current transducer when power supply device 60 has external power supply, or battery insertion groove 602 is inserted with battery), power supply switch circuit 604 can be by boost type DC to DC voltage converting circuit 606 out-put supplies to timing and memory cell 618, and to rechargeable battery 614 chargings.On the contrary, when power supply device 60 did not have external power supply, diode 608 can be closed, and then the stored power supply of rechargeable battery 614 can export timing and memory cell 618 to by resistance 612, to keep the lasting running of timing and memory cell 618.In other words, no matter whether electronic installation is just in use or be switched off power supply, timing and memory cell 618 all can receive the required power supply of running.In addition, because rechargeable battery 614 can charge when power supply device 60 has external power supply, so the user need not worry dead battery and cause being stored in situation generations such as data losss in the storage chip, timing error.
As shown in Figure 6, when power supply device 60 has external power supply, power supply switch circuit 604 by boost type DC to DC voltage converting circuit 606 out-put supplies to timing and memory cell 618.Because boost type DC includes coupling assemblies such as electric capacity, inductance to DC voltage converting circuit 606, therefore its effect is similar to a filter, can absorb or offset the influence that current impulse that noise or static discharge produce is caused timing and memory cell 618.Therefore, by the protection of boost type DC to DC voltage converting circuit 606, timing and memory cell 618 can not be subjected to the influence of static discharge.In addition, compared to prior art, the present invention can use less diode, thereby reduces production cost.
In sum, the present invention can reduce required diode to reduce production costs, and the more important thing is, by the coupling assembly in the DC power supply modular converter, the present invention can prevent the influence to timing and memory cell of static discharge and high-frequency noise.Therefore, timing and memory cell need not comprise static discharge protection component, to simplify circuit complexity, reduce production costs, and improve the shortcoming of prior art.
The above only is preferred embodiment of the present invention, and all equalizations of doing according to claim of the present invention change and modify, and all should belong to covering scope of the present invention.
Claims (23)
1. power supply device that is used for an electronic installation includes:
One direct current power supply output module is in order to export a direct current power supply;
One direct current power transfer module includes an input and is coupled to this DC power supply output module, in order to the voltage of whole this DC power supply, and an output;
One diode includes the output that an input is coupled to this DC power supply modular converter, and an output;
One Charge Storage module is coupled to the output of this diode, in order to store charge; And
One first load unit is coupled to this Charge Storage module.
2. power supply device as claimed in claim 1, wherein this DC power supply output module includes:
One direct current power supply slot is in order to chimeric one out splice going splice that exchanges direct current transducer;
One battery insertion groove is in order to a chimeric battery; And
One power supply switch circuit is coupled to this DC power supply slot, this battery insertion groove and this DC power supply modular converter, is coupled to this DC power supply slot or this battery insertion groove in order to this DC power supply modular converter is switched.
3. power supply device as claimed in claim 1, wherein this DC power supply modular converter be a boost type DC to DC voltage converting circuit, it includes:
One inductance includes one first end and is coupled to this DC power supply output module, and one second end;
One first switch module includes second end that one first end is coupled to this inductance, and one second end is coupled to an end systematically, and one the 3rd end, in order to the signal that is received according to the 3rd end, with the signal conducting of this first end to this second end;
One second switch assembly, include one first end and be coupled to this first switch module and this inductance, one second end is coupled to the input of this diode, and the magnitude of voltage of signal that is used to this first end is during greater than one first value, with the signal conducting of this first end to this second end; And
One control assembly is coupled between the 3rd end of second end of this second switch assembly and this first switch module, in order to the power supply of exporting according to second end of this second switch assembly, controls the unlatching cycle of this first switch module.
4. power supply device as claimed in claim 3, wherein this first switch module is a metal oxide semiconductor transistor, first end of this first switch module is a drain electrode, and second end of this first switch module is an one source pole, and the 3rd end of this first switch module is a grid.
5. power supply device as claimed in claim 3, wherein this second switch assembly is a diode, first end of this second switch assembly is a N utmost point, and second end of this second switch assembly is a P utmost point.
6. power supply device as claimed in claim 5, wherein this diode is to realize with a metal oxide semiconductor transistor.
7. power supply device as claimed in claim 3, wherein this control assembly includes:
One bleeder circuit is coupled to second end of this second switch assembly, in order to produce a dividing potential drop;
One reference voltage generator is in order to produce a reference voltage;
One comparison circuit is coupled to this bleeder circuit and this reference voltage generator, in order to relatively this dividing potential drop and this reference voltage; And
One oscillator is coupled to the 3rd end of this comparison circuit and this first switch module, in order to the comparative result according to this comparison circuit, adjusts the work period of the signal of the 3rd end that exports this first switch module to.
8. power supply device as claimed in claim 7, wherein this oscillator is a pulse width modulation oscillator.
9. power supply device as claimed in claim 3, wherein this DC power supply modular converter also includes an electric capacity, is coupled between the output of this DC power supply modular converter and this systematically hold.
10. power supply device as claimed in claim 1, wherein this DC power supply modular converter be a buck direct current to DC voltage converting circuit, it includes:
One first switch module includes one first end and is coupled to this DC power supply output module, one second end, and one the 3rd end, in order to the signal that is received according to the 3rd end, with the signal conducting of this first end to this second end;
One second switch assembly includes one first end and is coupled to a ground end, and one second end is coupled to second end of this first switch module, and the magnitude of voltage of signal that is used to this first end is during greater than one first value, with the signal conducting of this first end to this second end;
One inductance include between first end that one first end is coupled to second end of this first switch module and this second switch assembly, and one second end is coupled to the input of this diode;
One control assembly is coupled between the 3rd end of second end of this inductance and this first switch module, in order to the power supply of exporting according to second end of this inductance, controls the unlatching cycle of this first switch module.
11. power supply device as claimed in claim 10, wherein this first switch module is a metal oxide semiconductor transistor, first end of this first switch module is a drain electrode, and second end of this first switch module is an one source pole, and the 3rd end of this first switch module is a grid.
12. power supply device as claimed in claim 10, wherein this second switch assembly is a diode, and first end of this second switch assembly is a N utmost point, and second end of this second switch assembly is a P utmost point.
13. power supply device as claimed in claim 12, wherein this diode is to realize with a metal oxide semiconductor transistor.
14. power supply device as claimed in claim 10, wherein this control assembly includes:
One bleeder circuit is coupled to second end of this inductance, in order to produce a dividing potential drop;
One reference voltage generator is in order to produce a reference voltage;
One comparison circuit is coupled to this bleeder circuit and this reference voltage generator, in order to relatively this dividing potential drop and this reference voltage; And
One oscillator is coupled to the 3rd end of this comparison circuit and this first switch module, in order to the comparative result according to this comparison circuit, adjusts the work period of the signal of the 3rd end that exports this first switch module to.
15. power supply device as claimed in claim 14, wherein this oscillator is a pulse width modulation oscillator.
16. power supply device as claimed in claim 3, wherein this DC power supply modular converter also comprises an electric capacity in addition, is coupled between the output of this DC power supply modular converter and this systematically hold.
17. power supply device as claimed in claim 1, wherein this first load unit includes a real-time clock generation module.
18. power supply device as claimed in claim 17, wherein this first load unit also includes a storage module.
19. power supply device as claimed in claim 1, wherein this Charge Storage module includes:
One resistance, the one end is coupled to the output of this diode; And
One rechargeable battery is coupled to the other end of this resistance.
20. power supply device as claimed in claim 1, wherein the output of this DC power supply modular converter also is coupled to one second load unit.
21. power supply device as claimed in claim 20, it also comprises a switch element, is coupled between the output and this second load unit of this DC power supply modular converter.
22. power supply device as claimed in claim 21, wherein this switch element forms the output of this DC power supply modular converter and the current path of this second load unit when this electronic installation is opened.
23. power supply device as claimed in claim 20, wherein this second load unit is a chip.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US11/420,769 | 2006-05-29 | ||
| US11/420,769 US20070222297A1 (en) | 2006-03-23 | 2006-05-29 | Power Supply Device of an Electronic Device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101083400A true CN101083400A (en) | 2007-12-05 |
Family
ID=38912752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200710103259 Pending CN101083400A (en) | 2006-05-29 | 2007-05-10 | Power supply device of an electronic device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101083400A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102457087A (en) * | 2010-10-22 | 2012-05-16 | Nec爱克赛斯科技株式会社 | Electric power path switching method and electric power path switching circuit |
| CN103367820A (en) * | 2012-04-06 | 2013-10-23 | 株式会社半导体能源研究所 | Protective circuit module and battery pack |
| CN107517107A (en) * | 2017-07-06 | 2017-12-26 | 深圳市顺讯电子有限公司 | A kind of double isolation Ethernet bidirectional power supply systems of buck and method of supplying power to |
| CN109217402A (en) * | 2017-07-07 | 2019-01-15 | 神讯电脑(昆山)有限公司 | The control circuit and its control method of cradle |
| CN113890158A (en) * | 2021-10-26 | 2022-01-04 | 东莞新能德科技有限公司 | Battery energy-saving circuit and electronic equipment |
| WO2022178856A1 (en) * | 2021-02-26 | 2022-09-01 | 华为技术有限公司 | Charging circuit and electronic device |
-
2007
- 2007-05-10 CN CN 200710103259 patent/CN101083400A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102457087A (en) * | 2010-10-22 | 2012-05-16 | Nec爱克赛斯科技株式会社 | Electric power path switching method and electric power path switching circuit |
| CN103367820A (en) * | 2012-04-06 | 2013-10-23 | 株式会社半导体能源研究所 | Protective circuit module and battery pack |
| CN103367820B (en) * | 2012-04-06 | 2018-03-30 | 株式会社半导体能源研究所 | Protection circuit module and battery pack |
| CN107517107A (en) * | 2017-07-06 | 2017-12-26 | 深圳市顺讯电子有限公司 | A kind of double isolation Ethernet bidirectional power supply systems of buck and method of supplying power to |
| CN109217402A (en) * | 2017-07-07 | 2019-01-15 | 神讯电脑(昆山)有限公司 | The control circuit and its control method of cradle |
| WO2022178856A1 (en) * | 2021-02-26 | 2022-09-01 | 华为技术有限公司 | Charging circuit and electronic device |
| CN113890158A (en) * | 2021-10-26 | 2022-01-04 | 东莞新能德科技有限公司 | Battery energy-saving circuit and electronic equipment |
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