CN1805240A - Power supply circuit for electronic devices - Google Patents
Power supply circuit for electronic devices Download PDFInfo
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- CN1805240A CN1805240A CN 200510134476 CN200510134476A CN1805240A CN 1805240 A CN1805240 A CN 1805240A CN 200510134476 CN200510134476 CN 200510134476 CN 200510134476 A CN200510134476 A CN 200510134476A CN 1805240 A CN1805240 A CN 1805240A
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Abstract
The invention relates to a power supply circuit of electric device, which comprises a main battery, a backup battery, a voltage detecting unit, a de-voltage unit, a voltage rise unit, a switch unit and a control unit. Wherein, the output voltage of main battery is reduced by the de-voltage unit to preset operation voltage to supply the electric device; when the voltage detecting unit detects the voltage of main battery lower than the operation voltage of de-voltage unit, it can send a signal to the control unit which can control the switch unit to switch the output voltage of main battery into voltage rise unit and open the voltage rise unit and close the de-voltage unit; the output voltage of main battery via the voltage rise unit can be increased to preset operation voltage to supply enough voltage to the electric device; the main battery can directly use the voltage rise unit of backup battery to increase the voltage and via using switch unit to switch between the de-voltage unit and the voltage rise unit to enlarge the application of the voltage of main battery to fully utilize the energy and prolong the service time of electric device.
Description
Technical field
The invention relates to a kind of power supply circuits of electronic installation, refer in particular to a kind of effective voltage that makes full use of battery and carry out the electronic installation power supply to prolong the circuit of its service time.
Background technology
Often be used in some hand-held electronic devices (as mobile phone, PDA) lithium battery, the general available scope of its effective voltage is 2.7V～4.2V, as shown in Figure 1, power supply circuits schematic diagram for general electronic installation, main battery 11 and a down block 13 electrical couplings and reserve battery 12 and an assembly 14 electrical couplings of boosting wherein, and when the voltage of main battery 11 is higher than the voltage of down block 13 settings, use for electronic installation (load 15) by the voltage that is depressurized to setting by down block 13, in addition, the electric power of reserve battery 12 mainly is just can be used when replacing main battery 11 for the user, sub-device is kept basic running in order to power, and be unlikely to make the data of internal reservoir to run off because of replacing main battery 11, yet the voltage of general reserve battery 12 is not too high usually, therefore, be by boosting and use to produce the sub-device of enough power voltage supplies by the assembly 14 that boosts; Moreover, the voltage that present PDA mainly powers is controlled to be 3.7V approximately, in case voltage is lower than 3.7V, system will force PDA is entered sleep state, the electric weight of residue 3.3V to 3.7V then is to be used for preserving data to use, yet in order to make main battery 11 can provide 3.3V voltage to use to PDA, therefore, when the output voltage of main battery 11 during greater than the 3.3V that sets, output voltage can be carried out step-down (BUCK) through a down block 13 and handle, but PDA is given in the power supply of just having no idea when battery is lower than 3.3V, so, lithium battery just can't be used effectively at the voltage of 2.7V～3.3V scope, and also can be compressed on the time of electronic installation use.
At above-mentioned problem, some manufacturer is in order to increase the scope of application of main battery 11, can use this down block 13 instead the buck assembly power supply is provided, just when the output voltage of main battery 11 is lower than 3.3V, can be via the processing of boosting of this buck assembly, and can increase the scope that main battery 11 effective voltages are utilized, but so mode is except meeting increases the usable floor area of circuit board, and it is relatively poor that its efficient also can become; So, if the voltage scope of application that can further can improve main battery 11 power supplies to increase the service time of electronic installation, is the place of the technical difficulties of this case inventor institute desire solution.
Summary of the invention
So the power supply circuits of electronic installation of the present invention are to comprise: a main battery, a reserve battery, a voltage detection unit, a pressure unit, a boosting unit, switch a unit and a control unit; Wherein
Main battery, in order to provide the electronic installation running required voltage, main battery has a positive electrode;
Pressure unit has a reference voltage of setting, mainly in order to the output voltage that reduces main battery to reference voltage to offer electronic installation, pressure unit also has an input and an activation end, wherein the input electrical couplings is to the positive electrode of this main battery;
Voltage detection unit drops to the reference voltage of this setting and sends a signal in order to the reaction main battery voltage, and this voltage detection unit has an input and an output, and wherein this input electrical couplings is to the positive electrode of this main battery;
Boosting unit has a reference voltage consistent with the reference voltage level of pressure unit, in order to the output voltage that promotes this main battery to this reference voltage to offer this electronic installation, this boosting unit has an input and an activation end;
Switch unit, can be a MOS switch module, switch to this boosting unit and produce in order to output voltage and be electrically connected this main battery, switch unit has plural input, an output and an activation end, wherein an input electrical couplings is to the positive electrode of main battery, another input electrical couplings is to the positive electrode of reserve battery, and the output electrical couplings is to the input of boosting unit;
Reserve battery when electronic installation is changed main battery, replaces this main battery supply electric power and has a positive electrode to this reserve battery of electronic installation, and a wherein input of this positive electrode and this switch unit produces electrical couplings; And
Control unit, but can be the programmed logic assembly of a complexity, in order to receive the signal that this voltage detection unit sends, wherein when receiving this main battery voltage and be lower than the signal of voltage of this setting, control this switch unit the output voltage of main battery is switched to boosting unit, and control this pressure unit and close and start this boosting unit and use for this electronic installation with the output voltage that increases this main battery, this control unit has plural control end, and respectively with the output of this voltage detection unit, the activation end of this switch unit, the activation end of this pressure unit and the activation end of this boosting unit produce electrical couplings.
Description of drawings
Fig. 1 is the circuit diagram of the power supply circuits embodiment of existing electronic installation;
Fig. 2 is the circuit diagram of the power supply circuits preferred embodiment of electronic installation of the present invention;
[graphic primary clustering conventional letter explanation]
11 main batterys
12 reserve batteries
13 down block
14 assemblies that boost
15 loads
21 main batterys
22 reserve batteries
23 voltage detection units
24 switch units
25 control units
26 pressure units
27 boosting units
28 loads
Embodiment
For further understanding structure of the present invention, feature and purpose thereof, the attached now detailed description with graphic and preferred embodiment is as the back:
See also shown in Figure 2ly, be the circuit diagram of the power supply circuits preferred embodiment of electronic installation of the present invention.As shown in the figure, the present embodiment electronic installation is to be example with a PDA (Personal Digital Assistant) (PDA), and its power supply circuits mainly have a main battery 21, a reserve battery 22, a voltage detection unit 23, and switch unit 24, a control unit 25, a pressure unit 26 and a boosting unit 27.Change in the example in other, electronic installation also can be mobile phone (cell phone), calling set (pager), mobile computer (Note Book), e-dictionary or other electronic installation.
Main battery 21 has a positive electrode and a negative electrode, and wherein the input (IN) of a wherein input (A1) of the input (IN) of positive electrode and voltage detection unit 23, switch unit 24 and pressure unit 26 produces electrical couplings, and negative electrode ground connection; Present embodiment main battery 21 is to be example with the lithium battery, and the scope of application of its effective voltage is 2.7V～4.2V, mainly in order to provide PDA (Personal Digital Assistant) (PDA) running required voltage; Change in the example in other, main battery 21 also can be lead-acid battery (leadacid battery), nickel-cadmium cell (nickel cadmium battery), Ni-MH battery (nickel hydrogenbattery) and high-polymer lithium battery (polymer lithium battery) or other chargeable reusable secondary cell.
Pressure unit 26 can be general down block (IC) or circuit, wherein be set with a reference voltage, this reference voltage is the operating voltage of PDA (Personal Digital Assistant) (PDA), pressure unit 26 mainly in order to the output voltage that reduces main battery 21 to reference voltage to offer electronic installation; Pressure unit 26 also has an input (IN), an output (OUT), a ground end (GND) and an activation end (EN), wherein input (IN) electrical couplings is to the positive electrode of main battery 21, ground end (GND) ground connection, activation end (EN) electrical couplings is to a wherein control end (a3) of control unit 25, and output (OUT) electrical couplings to a load 28, wherein load 28 referred to herein as PDA (Personal Digital Assistant) (PDA), that is the voltage of main battery 21 outputs offers load 28 (PDA (Personal Digital Assistant)) after pressure unit 26 step-downs; The operating voltage of PDA (Personal Digital Assistant) is set at 3.3V in present embodiment; So also can be other setting voltage scope in other alternate embodiment, and not as limit.
Voltage detection unit 23 drops to the reference voltage (3.3V) of setting and sends a signal to control unit 25 in order to reaction main battery 21 voltages, this voltage detection unit 23 has an input (IN), an output (OUT) and ground end (GND), wherein this input (IN) electrical couplings is to the positive electrode of this main battery 21, output (OUT) electrical couplings is to a wherein control end (a2) of control unit 25, and ground end (GND) ground connection.
Boosting unit 27 has a reference voltage consistent with the reference voltage level of pressure unit 26, this reference voltage also is the operating voltage of PDA (Personal Digital Assistant) (PDA), boosting unit 27 mainly in order to the output voltage that promotes this main battery 21 to this reference voltage to offer this electronic installation; Boosting unit 27 also has an input (IN), an output (OUT), a ground end (GND) and an activation end (EN), wherein input (IN) electrical couplings is to the output of switch unit 24, ground end (GND) ground connection, activation end (EN) electrical couplings is to a wherein control end (a4) of control unit 25, and output (OUT) electrical couplings to a load 28 (PDA (Personal Digital Assistant)).
Switch unit 24 can be a MOS switch module, switch to this boosting unit 27 and produce and to be electrically connected in order to output voltage this main battery 21, this switch unit 24 have two inputs (A1) (A2), an output (OUT) and an activation end (EN), wherein input (A1) electrical couplings is to the positive electrode of main battery 21, input (A2) electrical couplings is to the positive electrode of reserve battery 22, activation end (EN) electrical couplings is to a wherein control end (a1) of control unit 25, and output (OUT) electrical couplings is to the input (IN) of boosting unit 27.
Reserve battery 22 mainly is when electronic installation is changed main battery 21, replaces these main battery 21 supply electric power and gives electronic installation, disappears to avoid data stored in the electronic installation; This reserve battery 22 has a positive electrode and a negative electrode, and a wherein input (A2) of positive electrode and switch unit 24 produces electrical couplings, and negative electrode ground connection.
Control unit 25, but can be a complexity the programmed logic assembly (Complex ProgrammableLogic Device, CPLD), in order to receive the signal that voltage detection unit 23 sends; Control unit 25 have four control ends (a1) (a2) (a3) (a4) and produce electrical couplings with the output (out) of the activation end (EN) of switch unit 24, voltage detection unit 23, the activation end (EN) of pressure unit 26 and the activation end (EN) of boosting unit 27 respectively; Wherein when control unit 25 receives main batterys 21 voltages and is lower than the signal of reference voltage of setting, and control this pressure unit 26 close and start this boosting unit 27 with the output voltage that increases this main battery 21 for this electronic installation use.
In the present embodiment, these power supply circuits are main to be provided to the required electric power of PDA (Personal Digital Assistant) (PDA) running, wherein the scope definition that can use of the output voltage of main battery 21 is between 2.7V to 4.2V, and the main power supply of PDA (Personal Digital Assistant) (PDA) is defined in 3.3V, therefore, the voltage that provides at main battery 21 at the beginning is during greater than 3.3V, can be by the operating voltage 3.3V that the output voltage of main battery 21 is depressurized to setting being used for PDA (Personal Digital Assistant) (PDA) by pressure unit 26, and when in a single day the voltage of voltage detection unit 23 detection main batterys 21 be lower than the operating voltage 3.3V of setting, promptly can send a signalisation control unit 25, the activation end (EN) that control unit 25 then can send a signal to switch unit 24 via control end (a1) switches to boosting unit 27 (that is the Status Change that is electrically connected by input (A2) and output (OUT) of the inside of switch unit 24 state that to be input (A1) be electrically connected with output (OUT)) with control switch unit 24 with the output voltage of main battery 21, then send a signal to the activation end (EN) of boosting unit 27 to open boosting unit 27 and to send a signal to the activation end (EN) of pressure unit 26 to close pressure unit 26 via control end (a3) via control end (a4), and can see through the output voltage of main battery (being lower than 3.3V) at this moment the operating voltage that boosting unit boosts to setting is 3.3V, and offers the enough voltage runnings of load 28 devices (PDA (Personal Digital Assistant)) by the output (OUT) of boosting unit 27; When electronic installation is changed main battery 21, reserve battery 22 then replaces main battery 21 supply electric power and gives electronic installation, pack into after treating that main battery 21 charged behind the electronic installation, and when in a single day the voltage of voltage detection unit 23 detection main batterys 21 be higher than the operating voltage 3.7V of setting, promptly can send a signalisation control unit 25, control unit 25 then can be controlled switch unit 24 output voltage of main battery 21 is switched to pressure unit 27 (that is the Status Change that is electrically connected by input (A1) and output (OUT) of the inside of switch unit 24 state that to be input (A2) be electrically connected with output (OUT)), then the activation end (EN) that sends a signal to boosting unit 27 via control end (a4) with the activation end (EN) of closing boosting unit 27 and sending a signal to pressure unit 26 via control end (a3) to open pressure unit 26.
In sum, the present invention allows main battery 21 can directly utilize the boosting unit 27 of reserve battery 22 to go to boost, therefore only need to increase by a switching unit 24 (being generally the MOS switch of a small size) and do switching at boosting unit 27 and 26 of pressure units, and do not need to set up in addition the assembly that boosts, thereby can not have influence on the former the design of electronic installation; Moreover, so design makes electronic installation can fully apply to main battery 21 to be lower than the following voltage of 3.3V (working voltage be 4.2 to 3.3V) usually, and can increase the scope of application (4.2V to 2.7V) of main battery 21 voltages, so that (operating voltage 3.7v originally will enter sleep service time of prolonging electronic installation, also can prolong working voltage and enter sleep again to about 3.5v, because 3.3 to 3.7v kept data in the past, can keep data with 2.7v to 3.5v now.)。
The above, it only is a preferred embodiment of the present invention, be not to be used for limiting scope of the invention process, the equalization of doing according to the described shape of the present patent application claim, structure, feature and spirit changes and modifies such as, all should be included in this clearly demarcated claim.
Claims (5)
1, a kind of power supply circuits of electronic installation is characterized in that comprising:
One main battery, in order to provide this electronic installation running required voltage, this main battery has a positive electrode;
One pressure unit, has a reference voltage of setting, mainly in order to the output voltage that reduces this main battery to this reference voltage to offer this electronic installation, this pressure unit has an input and an activation end, wherein this input electrical couplings is to the positive electrode of this main battery;
One voltage detection unit drops to the reference voltage of this setting and sends a signal in order to react this main battery voltage, and this voltage detection unit has an input and an output, and wherein this input electrical couplings is to the positive electrode of this main battery;
One boosting unit has a reference voltage of setting, in order to the output voltage that promotes this main battery to this reference voltage to offer this electronic installation, this boosting unit has an input and an activation end;
One switches the unit,, the output voltage of this main battery is electrically connected to this boosting unit in order to being switched, this switch unit has plural input, an output and an activation end, wherein an input electrical couplings is to the positive electrode of main battery, and the output electrical couplings is to the input of boosting unit;
One control unit, in order to receive this signal that this voltage detection unit sends, the output voltage of main battery is switched and be electrically connected to boosting unit to control this switch unit, and control this pressure unit and close and start this boosting unit and use for this electronic installation with the output voltage that increases this main battery, this control unit has plural control end, and produces electrical couplings with the output of this voltage detection unit, the activation end of this switch unit, the activation end of this pressure unit and the activation end of this boosting unit respectively.
2, the electric supply installation of electronic installation as claimed in claim 1, it is characterized in that, more comprise a reserve battery, when electronic installation is changed main battery, replace this main battery supply electric power and give electronic installation, this reserve battery has a positive electrode, and a wherein input of this positive electrode and this switch unit produces electrical couplings.
3, the electric supply installation of electronic installation as claimed in claim 1 is characterized in that, the setting reference voltage level of described this boosting unit and pressure unit must be consistent.
4, the electric supply installation of electronic installation as claimed in claim 1 is characterized in that, described this switch unit is a MOS switch module.
5, the electric supply installation of electronic installation as claimed in claim 1 is characterized in that, but described this control unit is a programmed logic assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510134476 CN1805240A (en) | 2005-12-15 | 2005-12-15 | Power supply circuit for electronic devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510134476 CN1805240A (en) | 2005-12-15 | 2005-12-15 | Power supply circuit for electronic devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1805240A true CN1805240A (en) | 2006-07-19 |
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ID=36867137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510134476 Pending CN1805240A (en) | 2005-12-15 | 2005-12-15 | Power supply circuit for electronic devices |
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| Country | Link |
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| CN (1) | CN1805240A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103166251A (en) * | 2011-09-02 | 2013-06-19 | 亚旭电子科技(江苏)有限公司 | Charging circuit for standby battery |
| CN103580098A (en) * | 2012-07-24 | 2014-02-12 | 索尼电脑娱乐公司 | Electric device |
| CN108702007A (en) * | 2017-02-16 | 2018-10-23 | 深圳市大疆灵眸科技有限公司 | Method of supplying power to, for electric installation and electronic device |
| CN110771003A (en) * | 2017-06-30 | 2020-02-07 | 法国大陆汽车公司 | System and method for backup battery management for emergency call devices |
| CN110932572A (en) * | 2019-11-08 | 2020-03-27 | 国网冀北电力有限公司张家口供电公司 | Direct current power supply circuit and system |
-
2005
- 2005-12-15 CN CN 200510134476 patent/CN1805240A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103166251A (en) * | 2011-09-02 | 2013-06-19 | 亚旭电子科技(江苏)有限公司 | Charging circuit for standby battery |
| CN103166251B (en) * | 2011-09-02 | 2015-01-28 | 亚旭电子科技(江苏)有限公司 | Charging circuit for standby battery |
| CN103580098A (en) * | 2012-07-24 | 2014-02-12 | 索尼电脑娱乐公司 | Electric device |
| CN103580098B (en) * | 2012-07-24 | 2018-05-04 | 索尼电脑娱乐公司 | Electric device |
| CN108702007A (en) * | 2017-02-16 | 2018-10-23 | 深圳市大疆灵眸科技有限公司 | Method of supplying power to, for electric installation and electronic device |
| US11211806B2 (en) | 2017-02-16 | 2021-12-28 | Sz Dji Osmo Technology Co., Ltd. | Power supply method, power supply device, and electronic device |
| CN110771003A (en) * | 2017-06-30 | 2020-02-07 | 法国大陆汽车公司 | System and method for backup battery management for emergency call devices |
| CN110932572A (en) * | 2019-11-08 | 2020-03-27 | 国网冀北电力有限公司张家口供电公司 | Direct current power supply circuit and system |
| CN110932572B (en) * | 2019-11-08 | 2023-04-07 | 国网冀北电力有限公司张家口供电公司 | Direct current power supply circuit and system |
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