CN103208989A - Device enabling electronic device to start up immediately when over discharge battery is charged - Google Patents
Device enabling electronic device to start up immediately when over discharge battery is charged Download PDFInfo
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- CN103208989A CN103208989A CN2012100581301A CN201210058130A CN103208989A CN 103208989 A CN103208989 A CN 103208989A CN 2012100581301 A CN2012100581301 A CN 2012100581301A CN 201210058130 A CN201210058130 A CN 201210058130A CN 103208989 A CN103208989 A CN 103208989A
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Abstract
Provided is a device enabling an electronic device to start up immediately when an over discharge battery is charged. The device comprises a metal oxide semiconductor field effect transistor (MOSFET) and a logic control module. A source of the MOSFET is used for being connected with a cathode of a battery connector of the electronic device, and a drain of the MOSFET is used for being connected with a cathode of a power utilization circuit of the electronic device. The logic control module determines whether the battery is charged by a parasitic diode of the MOSFET or is directly charged by the MOSFET according to the battery voltage. Therefore, the electronic device can be started up immediately even when the instant charging voltage is lower than the startup voltage.
Description
Technical field
The application relates to electronic equipment, more specifically, relates to a kind of device that when charged in the overdischarge pond of electronic equipment electronic equipment is started shooting immediately.
Background technology
Along with the development of electronic device technology, the employed battery of electronic equipment has become the key factor that improves the electronic equipment performance.When battery is overused and when causing putting, cell voltage is put protection and is become 0V owing to crossing.At this moment to this battery charge, cell voltage moment for example can be jumped to about 2.7V, slowly rises by trickle charge then.But general electronic equipment all needs supply power voltage to be higher than 2.7V could start shooting, and then needs 3.1V normally to start as the Weisheng platform.Simultaneously because the electric current of trickle charge generally little (being generally about 100mA), so (for example, 3.1V) need a few minutes from beginning to be charged to the start voltage that cell voltage returns to electronic equipment.And this section be in the period, electronic equipment owing to can not start shooting without any reaction, thereby influenced user's experience.
Application number is that CN201110174718.9, title pass through to adopt electronic switch for the application for a patent for invention of " implementation method and the mobile phone of the start of a kind of mobile phone overdischarge pond ", obtain a control signal from baseband chip simultaneously, and to select to use battery according to the height of cell voltage still be that the constant voltage output module is powered to system.This scheme needs the extra low pressure difference linear voltage regulator (LDO) that increases, and can cause the increase of cost.In addition, this scheme also needs a control signal of baseband chip, the design relative complex of hardware circuit.If this control signal is provided by GPIO (General Purpose Input Output, the general input and output) pin of baseband chip, then also need the control of software code, also can increase the complexity of software design.
Summary of the invention
The object of the present invention is to provide a kind of device of starting up speed of the electronic equipment of accelerating to use the overdischarge pond, by increasing some components and parts commonly used, make the overdischarge pond can access the lifting of a diode drop (approximately 0.7V) to meet or exceed the required start voltage of electronic equipment at the voltage of charging moment supply electronic equipment process chip.Like this, electronic equipment identified and operates with regard to starting shooting and show charging in the moment of charging, and improved user's experience.
According to an aspect of the present invention, a kind of device that electronic equipment is started shooting immediately when charging in the overdischarge pond is provided, comprise MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) pipe and Logic control module, wherein: the source electrode of MOSFET pipe is used for being connected with the negative pole of the battery connector of electronic equipment, the drain electrode of MOSFET pipe is used for being connected with the negative pole of the power circuit of electronic equipment, wherein, described Logic control module (100) is managed the conducting of (15) according to cell voltage control MOSFET and is ended.
According to an aspect of the present invention, if cell voltage is lower than start voltage, then the grid voltage of Logic control module control MOSFET pipe ends the MOSFET pipe, with the parasitic diode by the MOSFET pipe to battery charge; If cell voltage is higher than start voltage, then the grid voltage of Logic control module control MOSFET pipe makes the conducting of MOSFET pipe, to manage directly to battery charge by MOSFET.
According to an aspect of the present invention, described Logic control module comprises: first resistor, second resistor, schmitt inverter, the 3rd resistor, the 4th resistor and inverter, wherein, one end of first resistor is applied in the voltage between the both positive and negative polarity of power circuit, the other end of first resistor is connected the other end ground connection of second resistor with an end of second resistor and the input of schmitt inverter; Charging voltage is applied to schmitt inverter as the operating voltage of schmitt inverter, the output of schmitt inverter is connected to an end of the 3rd resistor, the other end of the 3rd resistor is connected to an end of the 4th resistor and the input of inverter, the other end ground connection of the 4th resistor; Voltage between the both positive and negative polarity of power circuit is applied to inverter as the operating voltage of inverter, the output of inverter is applied to the grid of MOSFET pipe, wherein, first resistor and second resistor make that the voltage that is input to the input of schmitt inverter equals the changing voltage of schmitt inverter from the low level to the high level when the voltage between the both positive and negative polarity of power circuit is able to make the battery normal voltage of electronic equipment normal boot-strap; The 3rd resistor and the 4th resistor make to make when schmitt inverter is output as high level, is input to the voltage of input of inverter greater than the changing voltage of inverter.
According to a further aspect in the invention, described Logic control module comprises comparator, first resistor, second resistor and the 3rd resistor, wherein, charging voltage puts on an end of first resistor, the other end of first resistor is connected with an end of second resistor, the other end ground connection of second resistor, the voltage of the node between first resistor and second resistor remains start voltage, the voltage of the node between first resistor and second resistor is applied to the negative pole of comparator, cell voltage be applied to comparator positive pole, charging voltage is through the after-applied comparator operating voltage of device as a comparison that arrives of resistor, and the output of comparator is connected with the grid of MOSFET pipe.
According to a further aspect in the invention, a kind of device that electronic equipment is started shooting immediately when charging in the overdischarge pond is provided, the MOSFET pipe and the Logic control module that comprise the P raceway groove, wherein: the source electrode of MOSFET pipe is connected with the positive pole of the power circuit of electronic equipment, the drain electrode of MOSFET pipe is connected with the positive pole of the battery connector of electronic equipment, and described Logic control module is controlled the conducting of MOSFET pipe according to cell voltage and ended.
According to a further aspect in the invention, if cell voltage is lower than start voltage, then the grid voltage of Logic control module control MOSFET pipe ends the MOSFET pipe, with the parasitic diode by the MOSFET pipe to battery charge; If cell voltage is higher than start voltage, then the grid voltage of Logic control module control MOSFET pipe makes the conducting of MOSFET pipe, so that manage directly to battery charge by MOSFET.
According to a further aspect in the invention, described Logic control module comprises: resistor, resistor and schmitt inverter, wherein, one end of first resistor is applied in the voltage between the both positive and negative polarity of power circuit, the other end of first resistor is connected the other end ground connection of second resistor with an end of second resistor and the input of schmitt inverter; Charging voltage is applied to schmitt inverter as the operating voltage of schmitt inverter, the output of schmitt inverter is applied to the grid of MOSFET pipe, wherein, first resistor and second resistor make that the voltage that is input to the input of schmitt inverter equals the changing voltage of schmitt inverter from the low level to the high level when the voltage between the both positive and negative polarity of power circuit is able to make the battery normal voltage of electronic equipment normal boot-strap.
According to a further aspect in the invention, described Logic control module comprises comparator, first resistor, second resistor and the 3rd resistor, wherein, charging voltage puts on an end of first resistor, the other end of first resistor is connected with an end of second resistor, the other end ground connection of second resistor, the voltage of the node between first resistor and second resistor remains start voltage, the voltage of the node between first resistor and second resistor is applied to the positive pole of comparator, cell voltage be applied to comparator negative pole, cell voltage is through the after-applied comparator operating voltage of device as a comparison that arrives of resistor, and the output of comparator is connected with the grid of MOSFET pipe.
According to the present invention, described charging voltage can be 5V.
Description of drawings
By the description of carrying out below in conjunction with the accompanying drawing that embodiment exemplarily is shown, above-mentioned and other purposes of the present invention and characteristics will become apparent, wherein:
Fig. 1 illustrates the device 10 and electron device part connection diagram of starting up speed that uses the electronic equipment in overdischarge pond according to the quickening of the embodiment of the invention;
Fig. 2 is the concrete formation schematic diagram that illustrates according to the Logic control module 100 of Fig. 1 of the embodiment of the invention;
Fig. 3 illustrates the concrete formation schematic diagram of the Logic control module 100 of Fig. 1 according to another embodiment of the present invention;
Fig. 4 is the device 10 ' and electron device part connection diagram of starting up speed of accelerating to use the electronic equipment in overdischarge pond according to another embodiment of the present invention;
Fig. 5 is the concrete formation schematic diagram that illustrates according to the Logic control module 100 ' of Fig. 4 of the embodiment of the invention;
Fig. 6 is the concrete formation schematic diagram of the Logic control module 100 ' of Fig. 4 according to another embodiment of the present invention.
Embodiment
Below, describe embodiments of the invention in detail with reference to accompanying drawing.
As shown in Figure 1, Fig. 1 shows according to the quickening of the embodiment of the invention and uses the device 10 of starting up speed of the electronic equipment in overdischarge pond to be connected situation with electron device part.Device 10 is connected between the battery connector 20 and electronic equipment power circuit 30 of electronic equipment.Device 10 comprises MOSFET pipe 15 and Logic control module 100.Here, MOSFET pipe 15 is N-channel MOS FET pipes.As shown in Figure 1, the source electrode of MOSFET pipe 15 and drain electrode connect with the negative pole of battery connector 20 and the ground connection GND of electronic equipment power circuit 30 (that is, negative pole) respectively, and grid is connected with Logic control module 100.Device 10 and power circuit 30 can be integrated on the printed circuit board (PCB) of electronic equipment, and in addition, device 10 also can be the printed circuit board (PCB) independent parts with electronic equipment.
With reference to Fig. 2 and Fig. 3 concrete formation according to the Logic control module 100 of Fig. 1 of different embodiments of the invention is described respectively below.
As shown in Figure 2, Logic control module 100 comprises resistor R1 and R2, schmitt inverter 101, resistor R3 and R4 and inverter 102 according to an embodiment of the invention.The end of resistor R1 is applied in the voltage V between the both positive and negative polarity of power circuit (30)
PCB, the other end is connected with the end of resistor R2 and the input of schmitt inverter 101.The other end ground connection of R2, thus resistor R1 and R2 constitute bleeder circuit.Charging voltage (being generally 5V) is applied to schmitt inverter 101 as operating voltage.The output of schmitt inverter 101 is connected to the end of resistor R3, and the other end of resistor R3 is connected to the input of resistor R4 and inverter 102.The other end ground connection of resistor R4, thus resistor R3 and R4 have constituted another bleeder circuit.V
PCB(namely, voltage between the both positive and negative polarity of electronic equipment power circuit 30, that is to say the voltage between the GND of anode and electronic equipment power circuit 30) be applied to inverter 102 as operating voltage, the output of inverter 102 is applied to the grid of MOSFET pipe 15.
Explain the operation principle of device 10 of starting up speed that accelerate to use the electronic equipment in overdischarge pond according to the embodiment of the invention below in conjunction with Fig. 2.Specifically be operated in the following situation and describe in detail respectively:
A. electronic equipment does not connect charger and battery and had entered and put guard mode.At this time, whole electric equipment can not started shooting because power.
B. electronic equipment does not connect charger but battery is in normal operating condition.At this time, schmitt inverter 101 is owing to there not being the charging voltage power supply not have output.Because the drop-down effect of resistor R4, inverter 102 be input as low level, therefore, the anti-phase output high level of inverter 102 makes the MOSFET of N raceway groove manage 15 conductings.Because the conducting resistance that MOSFET manages after 15 conductings is minimum, can equivalence be the directly connection of ground connection (GND) of battery cathode and electronic equipment power circuit 30.
C. electronic equipment connection charger and battery had entered and had put guard mode.This time is in case electronic equipment inserts charger, the both positive and negative polarity voltage V of battery
BatCan go back up to about 2.7V moment.Because the dividing potential drop effect of resistor R1 and resistor R2, the voltage that is input to schmitt inverter 101 still is lower than its changing voltage V+ from the low level to the high level, so schmitt inverter 101 is output as high level, this high level becomes low level afterwards through inverter 102, so MOSFET pipe 15 ends.Like this, the voltage V of the both positive and negative polarity of electronic equipment power circuit 30
PCBBe 2.7V+0.7V=3.4V.Suitably select the value of R1 and R2, make the both positive and negative polarity voltage V when electronic equipment power circuit 30
PCBWhen reaching the normal voltage (approximately 3.8V) of battery, the voltage that is input to schmitt inverter 101 just equals the changing voltage V+ from the low level to the high level.So final inverter 102 is output as high level, and MOSFET manages 15 conductings, so the both positive and negative polarity voltage V of electronic equipment power circuit 30
PCBVbat is equal substantially with battery plus-negative plate voltage, is about 3.8V-0.7V=3.1V, still can keep electronic equipment to be in opening.Become 3.1V through R1 and R2 voltage after partial though at this moment be input to the voltage of schmitt inverter 101, because this branch pressure voltage still is higher than from high level to low level changing voltage V-, so the output of schmitt inverter 101 still is low level.
D. electronic equipment connection charger and cell voltage are greater than 2.7V but less than 3.1V.At this moment and situation C similar, MOSFET pipe 15 also is earlier by the back conducting in charging process.
E. electronic equipment connection charger and cell voltage are greater than 3.1V but less than 3.8V, and at this moment MOSFET pipe 15 can be in cut-off state, conducting at once then in a flash.
F. electronic equipment connection charger and cell voltage are greater than 3.8V.At this moment MOSFET pipe 15 can conducting always.
In the embodiment of Fig. 2, resistor R3 and R4 are 3.4V for the output dividing potential drop that is the schmitt inverter 101 of 5V with high level.Because the supply power voltage of inverter 102 is the both positive and negative polarity voltage V of electronic equipment power circuit 30
PCB, its minimum value is 3.4V, maximum is 3.8V+0.7V=4.5V (battery plus-negative plate voltage V
BatFor 3.8V and when just having inserted charger, MOSFET pipe 15 has flashy cut-off state, makes the both positive and negative polarity voltage V of electronic equipment power circuit 30
PCBBe 4.5V).Even at V
PCBDuring=4.5V, the input voltage of inverter 102 is 3.4V, so still think and be input as high level and output low level.
Below with reference to Fig. 3 the structure of Logic control module 100 is according to another embodiment of the present invention described.
As shown in Figure 3, Logic control module 100 comprises comparator 103, resistor R5, R6 and R7.Wherein, charging voltage puts on the end of resistor R5, and the other end of resistor R5 links to each other with the end of resistor R6, the other end ground connection of resistor R6, thus form bleeder circuit.The resistance sizes of resistor R5 and resistor R6 makes voltage after partial V ' remain start voltage (for example, 3.1V).Voltage after partial V ' is the negative pole input of device 103 as a comparison, and cell voltage V
Bat103 of device positive pole input as a comparison.Cell voltage V
BatAlso the after-applied comparator 103 that arrives of process resistor R7 is as its operating voltage.The output of comparator 103 is connected with the grid of MOSFET pipe 15.
Like this, when electronic equipment inserts charger, because the negative pole of comparator is input as start voltage, therefore, when the voltage of battery itself is higher than start voltage, comparator 103 output high level make MOSFET manage 15 conductings, and when the voltage of battery itself is lower than start voltage, comparator 103 output low levels make MOSFET pipe 15 end, pressure drop by parasitic diode makes the voltage between the both positive and negative polarity of electronic equipment power circuit 30 meet or exceed start voltage, thereby can realize accelerating the purpose that battery is crossed the starting up speed of the electronic equipment after putting.
Fig. 4 is the device 10 ' and electron device part connection diagram of starting up speed of accelerating to use the electronic equipment in overdischarge pond according to another embodiment of the present invention.As shown in Figure 4, device 10 ' is connected between the battery connector 20 and electronic equipment power circuit 30 of electronic equipment, comprises MOSFET pipe 15 ' and Logic control module 100 '.Different with the embodiment of Fig. 1 is, MOSFET pipe 15 ' among Fig. 4 is P channel mosfet pipe, and the source electrode of MOSFET pipe 15 ' is connected with the positive pole of battery connector 20 with the positive pole of drain electrode difference and electronic equipment power circuit 30, and grid is connected with Logic control module 100 '.
Similar with the embodiment of Fig. 1, Logic control module 100 ' can be determined to manage 15 ' directly to battery charge by the parasitic diode of MOSFET pipe 15 ' to battery charge or by MOSFET according to cell voltage.Particularly, Logic control module 100 ' outputs to the voltage of the grid of MOSFET pipe 15 ' by control, makes that in the overdischarge pond MOSFET pipe 15 ' is in cut-off state when just beginning to charge.This time, charging current flowed to shown in the arrow of Fig. 4, and charging current can be managed 15 ' parasitic diode by MOSFET battery is charged normal.After the electronic equipment start, electronic equipment charges normal, after the voltage of battery own has surpassed the voltage of electronic equipment normal boot-strap, Logic control module 100 ' control gate pole tension, thereby make the 15 ' conducting of MOSFET pipe, at this moment, be equivalent to directly battery be charged normal by MOSFET pipe 15 '.
With reference to Fig. 5 and Fig. 6 concrete formation according to the Logic control module 100 ' of Fig. 4 of different embodiments of the invention is described respectively below.
As shown in Figure 5, Logic control module 100 ' comprises resistor R1 ' and R2 ' and schmitt inverter 101 ' according to an embodiment of the invention.The end of resistor R1 ' is applied in the voltage V between the both positive and negative polarity of power circuit (30)
PCB, the other end is connected with the end of resistor R2 ' and the input of schmitt inverter 101 '.The other end ground connection of R2 ', thus resistor R1 ' and R2 ' constitute bleeder circuit.Charging voltage (being generally 5V) is applied to schmitt inverter 101 ' as operating voltage.The output of schmitt inverter 101 ' is applied to the grid of MOSFET pipe 15 '.
Explain the operation principle of device 10 ' of starting up speed that accelerate to use the electronic equipment in overdischarge pond according to the embodiment of the invention below in conjunction with Fig. 5.Specifically be operated in the following situation and describe in detail respectively:
A. electronic equipment does not connect charger and battery and had entered and put guard mode.At this time, whole electric equipment can not started shooting because power.
B. electronic equipment does not connect charger but battery is in normal operating condition.At this time, schmitt inverter 101 ' does not have output owing to there being charging voltage to power, thereby makes the MOSFET pipe 15 ' conducting of P raceway groove.
C. electronic equipment connection charger and battery had entered and had put guard mode.This time is in case electronic equipment inserts charger, the both positive and negative polarity voltage V of battery
BatCan go back up to about 2.7V moment.Because the dividing potential drop effect of resistor R1 and resistor R2, the voltage that is input to schmitt inverter 101 ' still is lower than its changing voltage V+ from the low level to the high level, so schmitt inverter 101 ' is output as high level, so MOSFET pipe 15 ' ends.Like this, the voltage V of the both positive and negative polarity of electronic equipment power circuit 30
PCBBe 2.7V+0.7V=3.4V.Suitably select the value of R1 ' and R2 ', feasible both positive and negative polarity voltage V when electronic equipment power circuit 30
PCBWhen reaching the normal voltage (approximately 3.8V) of battery, the voltage that is input to schmitt inverter 101 ' just equals the changing voltage V+ from the low level to the high level.Schmitt inverter 101 ' is output as low level like this, and MOSFET manages 15 ' conducting, so the both positive and negative polarity voltage V of electronic equipment power circuit 30
PCBVbat is equal substantially with battery plus-negative plate voltage, is about 3.8V-0.7V=3.1V, still can keep electronic equipment to be in opening.Become 3.1V through R1 ' and R2 ' voltage after partial though at this moment be input to the voltage of schmitt inverter 101 ', but because this branch pressure voltage still is higher than from high level to low level changing voltage V-, so the output of schmitt inverter 101 ' still is low level.
D. electronic equipment connection charger and cell voltage are greater than 2.7V but less than 3.1V.At this moment and situation C similar, MOSFET pipe 15 ' also is earlier by the back conducting in charging process.
E. electronic equipment connection charger and cell voltage are greater than 3.1V but less than 3.8V, and at this moment MOSFET pipe 15 ' can be in cut-off state, conducting at once then in a flash.
F. electronic equipment connection charger and cell voltage are greater than 3.8V.At this moment MOSFET pipe 15 ' can conducting always.
Below with reference to Fig. 6 the structure of Logic control module 100 ' is according to another embodiment of the present invention described.
As shown in Figure 6, Logic control module 100 ' comprises comparator 102 ', resistor R3 ', R4 ' and R5 '.Wherein, charging voltage puts on the end of resistor R3 ', and the other end of resistor R3 ' links to each other with the end of resistor R4 ', the other end ground connection of resistor R4 ', thus form bleeder circuit.The resistance sizes of resistor R3 ' and resistor R4 ' makes voltage after partial V ' remain start voltage (for example, 3.1V).Voltage after partial V ' is the positive pole input of device 102 ' as a comparison, and cell voltage V
Bat102 ' of device negative pole input as a comparison.Cell voltage V
BatAlso pass through the after-applied comparator 102 ' that arrives of resistor R5 ' as its operating voltage.The output of comparator 102 ' is connected with the grid of MOSFET pipe 15 '.
Like this, when electronic equipment inserts charger, because the positive pole of comparator is input as start voltage, therefore, when the voltage of battery itself is higher than start voltage, comparator 102 ' output low level makes MOSFET manage 15 ' conducting, and when the voltage of battery itself is lower than start voltage, comparator 102 ' output high level makes MOSFET pipe 15 ' end, pressure drop by parasitic diode makes the voltage between the both positive and negative polarity of electronic equipment power circuit 30 meet or exceed start voltage, thereby can realize accelerating the purpose that battery is crossed the starting up speed of the electronic equipment after putting.According to the present invention, the voltage that can make the overdischarge pond offer the electronic equipment process chip moment in charging obtains the lifting of about 0.7V.Like this, electronic equipment identified and operates with regard to starting shooting and show charging in the moment of charging, and improved user's experience.
Though illustrate and described the present invention with reference to some exemplary embodiments of the present invention, but it should be appreciated by those skilled in the art that, under the situation of the spirit and scope of the present invention that do not break away from the restriction of claim and equivalent thereof, can make various changes in form and details.
Claims (10)
1. device (10) that when charging in the overdischarge pond electronic equipment is started shooting immediately comprises MOSFET pipe (15) and the Logic control module (100) of N raceway groove, wherein:
The source electrode of MOSFET pipe (15) is connected with the negative pole of the battery connector (20) of electronic equipment, and the drain electrode of MOSFET pipe (15) is connected with the negative pole of the power circuit (30) of electronic equipment,
Described Logic control module (100) is managed the conducting of (15) according to cell voltage control MOSFET and is ended.
2. device as claimed in claim 1 (10), wherein, if cell voltage is lower than start voltage, then the grid voltage of Logic control module (100) control MOSFET pipe (15) ends MOSFET pipe (15), with the parasitic diode by MOSFET pipe (15) to battery charge; If cell voltage is higher than start voltage, then the grid voltage of Logic control module (100) control MOSFET pipe (15) makes (15) conducting of MOSFET pipe, so that manage (15) directly to battery charge by MOSFET.
3. device as claimed in claim 2 (10), wherein, described Logic control module (100) comprising: first resistor (R1), second resistor (R2), schmitt inverter (101), the 3rd resistor (R3), the 4th resistor (R4) and inverter (102)
Wherein, one end of first resistor (R1) is applied in the voltage between the both positive and negative polarity of power circuit (30), the other end of first resistor (R1) is connected the other end ground connection of second resistor (R2) with an end of second resistor (R2) and the input of schmitt inverter (101);
Charging voltage is applied to schmitt inverter (101) as the operating voltage of schmitt inverter (101), the output of schmitt inverter (101) is connected to an end of the 3rd resistor (R3), the other end of the 3rd resistor (R3) is connected to an end of the 4th resistor (R4) and the input of inverter (102), the other end ground connection of the 4th resistor (R4);
Voltage between the both positive and negative polarity of power circuit (30) is applied to inverter (102) as the operating voltage of inverter (102), and the output of inverter (102) is applied to the grid of MOSFET pipe (15),
Wherein, first resistor (R1) and second resistor (R2) make that the voltage that is input to the input of schmitt inverter (101) equals the changing voltage of schmitt inverter (101) from the low level to the high level when the voltage between the both positive and negative polarity of power circuit (30) is able to make the battery normal voltage of electronic equipment normal boot-strap;
The 3rd resistor (R3) and the 4th resistor (R4) make to make when schmitt inverter (101) when being output as high level, is input to the voltage of input of inverter (102) greater than the changing voltage of inverter (102).
4. device as claimed in claim 2 (10), described Logic control module (100) comprises comparator (103), first resistor (R5), second resistor (R6) and the 3rd resistor (R7),
Wherein, charging voltage puts on an end of first resistor (R5), the other end of first resistor (R5) is connected with an end of second resistor (R6), the other end ground connection of second resistor (R6), the voltage of the node between first resistor (R5) and second resistor (R6) remains start voltage, the voltage of the node between first resistor (R5) and second resistor (R6) is applied to the negative pole of comparator (103), cell voltage is applied to the positive pole of comparator (103), cell voltage is through after-applied comparator (103) operating voltage of device (103) as a comparison that arrives of resistor (R7), and the output of comparator (103) is connected with the grid of MOSFET pipe (15).
5. as any one the described device (10) in the claim 1 to 4, wherein, charging voltage is 5V.
6. device (10 ') that when charging in the overdischarge pond electronic equipment is started shooting immediately comprises MOSFET pipe (15 ') and the Logic control module (100 ') of P raceway groove, wherein:
The source electrode of MOSFET pipe (15 ') is connected with the positive pole of the power circuit (30) of electronic equipment, and the drain electrode of MOSFET pipe (15 ') is connected with the positive pole of the battery connector (20) of electronic equipment,
Described Logic control module (100 ') is managed the conducting of (15 ') according to cell voltage control MOSFET and is ended.
7. device as claimed in claim 6 (10 '), wherein, if cell voltage is lower than start voltage, then the grid voltage of Logic control module (100 ') control MOSFET pipe (15 ') ends MOSFET pipe (15 '), with the parasitic diode by MOSFET pipe (15 ') to battery charge; If cell voltage is higher than start voltage, then the grid voltage of Logic control module (100 ') control MOSFET pipe (15 ') makes (the 15 ') conducting of MOSFET pipe, so that manage (15 ') directly to battery charge by MOSFET.
8. the device (10 ') shown in claim 7, wherein, described Logic control module (100 ') comprising: resistor (R1 '), resistor (R2 ') and schmitt inverter (101 '),
Wherein, one end of first resistor (R1 ') is applied in the voltage between the both positive and negative polarity of power circuit (30), one end of the other end of first resistor (R1 ') and second resistor (R2 ') and the input of schmitt inverter (101 ') are connected, the other end ground connection of second resistor (R2 ');
Charging voltage is applied to schmitt inverter (101 ') as the operating voltage of schmitt inverter (101 '), and the output of schmitt inverter (101 ') is applied to the grid of MOSFET pipe (15 '),
Wherein, first resistor (R1 ') and second resistor (R2 ') make that the voltage that is input to the input of schmitt inverter (101 ') equals the changing voltage of schmitt inverter (101 ') from the low level to the high level when the voltage between the both positive and negative polarity of power circuit (30) is able to make the battery normal voltage of electronic equipment normal boot-strap.
9. device as claimed in claim 7 (10 '), described Logic control module (100 ') comprise comparator (102 '), first resistor (R3 '), second resistor (R4 ') and the 3rd resistor (R5 '),
Wherein, charging voltage puts on an end of first resistor (R3 '), one end of the other end of first resistor (R3 ') and second resistor (R4 ') is connected, the other end ground connection of second resistor (R4 '), the voltage of the node between first resistor (R3 ') and second resistor (R4 ') remains start voltage, the voltage of the node between first resistor (R3 ') and second resistor (R4 ') is applied to the positive pole of comparator (102 '), cell voltage is applied to the negative pole of comparator (102 '), cell voltage process resistor (R5 ') after-applied comparator (the 102 ') operating voltage of device (102 ') as a comparison that arrives, the output of comparator (102 ') is connected with the grid of MOSFET pipe (15 ').
10. as any one the described device (10 ') in the claim 6 to 9, wherein, charging voltage is 5V.
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| CN201210058130.1A CN103208989B (en) | 2012-03-06 | 2012-03-06 | Device when charging in overdischarge pond, electronic equipment being started shooting immediately |
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| CN201210058130.1A CN103208989B (en) | 2012-03-06 | 2012-03-06 | Device when charging in overdischarge pond, electronic equipment being started shooting immediately |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104682458A (en) * | 2013-11-27 | 2015-06-03 | 展讯通信（上海）有限公司 | Charging control device, system, charging chip and user terminal |
| CN108879824A (en) * | 2018-06-19 | 2018-11-23 | 深圳市中微半导体有限公司 | A kind of integrated charge battery protection functional circuit |
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| CN201222649Y (en) * | 2008-06-20 | 2009-04-15 | 深圳市同洲电子股份有限公司 | Overdischarging protection circuit capable of charging battery |
| US20100090662A1 (en) * | 2008-10-09 | 2010-04-15 | Tadashi Okuto | Charger system for rechargeable lithium batteries utilizing power supply terminal as initial charging means, and completing charging via internal constant-voltage charger |
| CN101908755A (en) * | 2009-06-02 | 2010-12-08 | 鸿富锦精密工业（深圳）有限公司 | Overdischarge protector for battery |
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| JPH08190936A (en) * | 1995-01-12 | 1996-07-23 | Fuji Photo Film Co Ltd | Charge/discharge protecting device of secondary battery |
| CN101189526A (en) * | 2005-05-13 | 2008-05-28 | Nxp股份有限公司 | Battery power management in over-discharge situation |
| CN201222649Y (en) * | 2008-06-20 | 2009-04-15 | 深圳市同洲电子股份有限公司 | Overdischarging protection circuit capable of charging battery |
| US20100090662A1 (en) * | 2008-10-09 | 2010-04-15 | Tadashi Okuto | Charger system for rechargeable lithium batteries utilizing power supply terminal as initial charging means, and completing charging via internal constant-voltage charger |
| CN101908755A (en) * | 2009-06-02 | 2010-12-08 | 鸿富锦精密工业（深圳）有限公司 | Overdischarge protector for battery |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104682458A (en) * | 2013-11-27 | 2015-06-03 | 展讯通信（上海）有限公司 | Charging control device, system, charging chip and user terminal |
| CN108879824A (en) * | 2018-06-19 | 2018-11-23 | 深圳市中微半导体有限公司 | A kind of integrated charge battery protection functional circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103208989B (en) | 2015-09-02 |
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