CN101902054A - Charging state indication device and charger - Google Patents
Charging state indication device and charger Download PDFInfo
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- CN101902054A CN101902054A CN 200910107536 CN200910107536A CN101902054A CN 101902054 A CN101902054 A CN 101902054A CN 200910107536 CN200910107536 CN 200910107536 CN 200910107536 A CN200910107536 A CN 200910107536A CN 101902054 A CN101902054 A CN 101902054A
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Abstract
The invention relates to a charger and a charging state indication device used in the charger. The charger comprises a charging power supply and the charging state indication device, and is characterized in that the charging state indication device comprises a charging state detection chip connected between a primary winding of a transformer of the charging power supply and the ground, and a display module used for displaying the charging state, wherein the charging state detection chip comprises a detection module for detecting the charging situation of the charging power supply, and a comparison module used for judging the current charging state according to the detected charging situation. The implementation of the charger and the charging state indication device used in the charger can use the control mode on the primary side; furthermore, the charger has simple and reliable circuit, high working efficiency and small loss.
Description
Technical field
The present invention relates to charging device, more particularly, relate to the charge condition display that uses in a kind of charger and the charger
Background technology
At present, generally on charger, can use charge condition display to indicate charged state, what the known charge state indicating device adopted all is primary side control (SECONDARY CONTROL) pattern, by using the altogether cloudy LED of a red and green color 223, PNP triode 222, (please referring to the Fig. 1) that silicon rectifier diode 220, resistance 219,221,224 are realized.
As the product V 219 of VOUT output current Io and resistance 219 (being the voltage drop on the resistance 219) during greater than the VBE (approximately being 0.6V) of triode 222, i.e. Io*R219＞0.6V, triode 222 saturation conductions, LED shiny red.Because the saturation voltage drop VCE of triode 222 approximately is 0.3V, and the red LED conduction voltage drop among the LED 223 approximately is 1.6V, both sums approximately are 1.9V, less than the green LED conduction voltage drop 1.7V sum 2.3V among pressure drop 0.6V on the resistance 219 and the LED 223, be VCE+VR＜V219+VG, so green does not work.
As the product V219 of VOUT output current Io and resistance 219 (being the voltage drop on the resistance 219) during less than the VBE (approximately being 0.6V) of triode 222, i.e. Io*R219＜0.6V, triode 222 ends, the LED bright green.
But this circuit has following defective,
1, this circuit is when the amount of exports fixed load, the high 0.8V-1.0V of voltage ratio VOUT on the electric capacity 213, if with primary side control (PRIMARY CONTROL) pattern, can cause the high 0.8-1V of output no-load voltage ratio nominal load voltage, so this circuit can not be used under the primary side control model, can only be used under the primary side control model;
2, since this electric circuit inspection be resistance 219 and diode 220 upper reaches overcharge current the time pressure drop that produces, therefore cause power-efficient low;
3, the used components and parts of this circuit are more, and the cost of power supply is higher, reliability is low.
Therefore, need a kind of the have charger that can be applied to primary side control circuit and simple and reliable charge condition display and such charge condition display.
Summary of the invention
The technical problem to be solved in the present invention is, above-mentioned defective at prior art, provide a kind of and have the charger that can be applied to primary side control circuit and simple and reliable charge condition display and such charge condition display the technical solution adopted for the present invention to solve the technical problems is: construct a kind of charger, comprise charge power supply and charge condition display, described charge condition display comprises the elementary winding and the charged state detection chip between the ground of the transformer that is connected charge power supply and is used to show the display module of charged state, wherein, described charged state detection chip comprises:
Detection module is used to detect the charge condition of charge power supply;
Comparison module is used for judging current charged state according to described detected charge condition.
In charger of the present invention, described charged state detection chip further comprises:
Display driver is used for driving described display module according to described current charged state and shows described current charged state.
In charger of the present invention, described detection module comprises:
The frequency acquisition module is used to obtain the operating frequency of described charged state detection chip, and wherein said operating frequency is directly proportional with described charging current;
Frequency-electric signal transducer is used for described operating frequency and converts the signal of telecommunication that is directly proportional with described charging current to.
In charger of the present invention, described detection module comprises:
Sampling hold circuit is used for the elementary auxiliary winding sampling signal of telecommunication from described transformer;
Error amplifier is used for the signal of telecommunication with the described sampling signal of telecommunication compares with reference value and output is directly proportional with charging current.
In charger of the present invention, described comparison module comprises comparator and filter, the positive input of wherein said comparator is connected to described detection module to obtain the signal of telecommunication that is directly proportional with described charging current, reverse input end is connected to reference electrical signal, output is connected to the input of described filter, and the output of described filter is connected to described display driver with the output charged state.
In charger of the present invention, described display driver comprises that being used to of being connected with the output of described filter respectively drives described display module and show first driver of first charged state and be used to drive second driver that described display module shows second charged state.
In charger of the present invention, described display module comprises a LED who is subjected to described first driver drives, the 2nd LED that is subjected to described second driver drives, and be connected to the anode of described first and second LED and the current-limiting resistance between the power supply, wherein, described first and second LED are for being total to positive LED.
In charger of the present invention, described display module comprises a LED who is subjected to described first driver drives, the 2nd LED that is subjected to described second driver drives, and be connected to the negative electrode of described first and second LED and the current-limiting resistance between the ground, wherein, described first and second LED are for being total to cloudy LED.
In charger of the present invention, described display driver comprise be connected with the output of described filter be used to drive the 3rd driver that described display module shows first charged state and second charged state respectively, described display module comprises the 3rd LED that is subjected to described the 3rd driver drives, and is connected to the anode of described the 3rd LED and the current-limiting resistance between the power supply.
The another technical scheme that the present invention solves its technical problem employing is, construct a kind of charge condition display, comprise elementary winding and charged state detection chip between the ground that is connected transformer and the display module that is used to show charged state, wherein, described charged state detection chip comprises:
Detection module is used to detect the charge condition of charge power supply;
Comparison module is used for judging current charged state according to described detected charge condition.
At charge condition display of the present invention, described charged state detection chip further comprises:
Display driver is used for driving described display module according to described current charged state and shows described current charged state.
At charge condition display of the present invention, described detection module comprises:
The frequency acquisition module is used to obtain the operating frequency of described charged state detection chip, and wherein said operating frequency is directly proportional with described charging current;
Frequency-electric signal transducer is used for described operating frequency and converts the signal of telecommunication that is directly proportional with described charging current to.
At charge condition display of the present invention, described detection module comprises:
Sampling hold circuit is used for the elementary auxiliary winding sampling signal of telecommunication from described transformer;
Error amplifier is used for the signal of telecommunication with the described sampling signal of telecommunication compares with reference value and output is directly proportional with charging current.
At charge condition display of the present invention, described comparison module comprises comparator and filter, the positive input of wherein said comparator is connected to described detection module to obtain the signal of telecommunication that is directly proportional with described charging current, reverse input end is connected to reference electrical signal, output is connected to the input of described filter, and the output of described filter is connected to described display driver with the output charged state.
At charge condition display of the present invention, described display driver comprises that being used to of being connected with the output of described filter respectively drives described display module and show first driver of first charged state and be used to drive second driver that described display module shows second charged state.
At charge condition display of the present invention, described display module comprises a LED who is subjected to described first driver drives, the 2nd LED that is subjected to described second driver drives, and be connected to the anode of described first and second LED and the current-limiting resistance between the power supply, wherein, described first and second LED are for being total to positive LED.
At charge condition display of the present invention, described display module comprises a LED who is subjected to described first driver drives, the 2nd LED that is subjected to described second driver drives, and be connected to the negative electrode of described first and second LED and the current-limiting resistance between the ground, wherein, described first and second LED are for being total to cloudy LED.
At charge condition display of the present invention, described display driver comprise be connected with the output of described filter be used to drive the 3rd driver that described display module shows first charged state and second charged state respectively, described display module comprises the 3rd LED that is subjected to described the 3rd driver drives, and is connected to the anode of described the 3rd LED and the current-limiting resistance between the power supply.
Implement the charge condition display that uses in charger of the present invention and the charger, can use the primary side control model, and circuit is simple and reliable, high efficiency, loss are little.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the circuit theory diagrams of the charger of prior art;
Fig. 2 is the circuit theory diagrams of first embodiment of charger of the present invention;
Fig. 3 is the circuit theory diagrams of first embodiment of the state indicating section of charge condition display of the present invention;
Fig. 4 is the circuit theory diagrams of second embodiment of the state indicating section of charge condition display of the present invention;
Fig. 5 is the circuit theory diagrams of the 3rd embodiment of the state indicating section of charge condition display of the present invention;
Fig. 6 is the circuit theory diagrams of the 4th embodiment of the state indicating section of charge condition display of the present invention;
Fig. 7 is the theory diagram that is suitable for first embodiment of the charge condition display of state indicating section among Fig. 3 or 4;
Fig. 8 is the theory diagram that is suitable for second embodiment of the charge condition display of state indicating section among Fig. 3 or 4;
Fig. 9 is the theory diagram that is suitable for first embodiment of the charge condition display of state indicating section among Fig. 5 or 6;
Figure 10 is the theory diagram that is suitable for second embodiment of the charge condition display of state indicating section among Fig. 5 or 6.
Embodiment
As shown in Figure 2, charger of the present invention comprises charge power supply and charge condition display.Wherein said charge condition display comprises the elementary winding and the charged state detection chip between the ground 100 of the transformer that is connected charge power supply and is used to show the display module 200 of charged state.Wherein, described charged state detection chip 100 comprises the detection module 101 of the charge condition that is used to detect charge power supply and is used for judging according to described detected charge condition the comparison module 102 of current charged state.
In the embodiment shown in Fig. 2, the FB of this charged state detection chip 100 holds the anode that is connected to diode D206 through resistance R 217, and the negative electrode of described diode D206 is through capacitor C 205 ground connection.The anode of described diode D206 is connected to an end of the elementary auxiliary winding of transformer simultaneously, the other end ground connection of the elementary auxiliary winding of described transformer.The CS end of this charged state detection chip 100 is connected to the source electrode of switching tube 209, the gate pole of described switching tube 209 is connected to the output Gate of charged state detection chip 100, the drain electrode of described switching tube 209 is connected to an end of the elementary winding of described transformer, and the other end of the elementary winding of described transformer is connected to input voltage.
In the embodiment shown in Fig. 2, this charged state detection chip 100 also comprises display driver 103, is used for driving described display module 200 according to described current charged state and shows described current charged state.As shown in Figure 2, this detection module 101 can detect the output current of charge power supply, thereby monitors the charge condition of charge power supply, and this charge condition is fed back to comparison module 102.Comparison module 102 is message processing modules of charge condition, it can be used for the charge condition and the standard charging situation of detection module 101 feedbacks are compared, thereby judge the charge condition of present charger, wherein this standard charging situation can be artificial the setting.Those skilled in the art can in the light of actual conditions set.For example, when detection module 101 obtain be the primary side output current time, comparison module compares the 1-/10-1/8 of itself and rated current, when primary side output current during less than the 1-of rated current/10-1/8, judges that current charged state is first charged state.Display driver 103 receives the first charged state signal and drives described display module 200 and shows first charged state.When primary side output current during, judge that current charged state is second charged state greater than the 1-of rated current/10-1/8.Display driver 103 receives the second charged state signal and drives described display module 200 and shows second charged state.In another simplified embodiment of the present invention, display module can directly receive charged state and show, therefore need not to use driving display module 103.
Fig. 3 is the circuit theory diagrams of first embodiment of the state indicating section of charge condition display of the present invention.As shown in Figure 3, display module 200 comprises green LED, red LED, and be connected to described green and the anode of red LED and the current-limiting resistance R1 between the power Vcc, wherein, the anode of red LED is connected to the LED_R pin of display driver 103, the anode of green LED is connected to the LEDG pin of display driver 103, and the anode of described red, green LED is through resistance R 1 ground connection.In this embodiment, red, green LED is for being total to cloudy LED.
In the present embodiment, judge that when comparison module 102 current charged state is second charged state, the LEDR pin of display driver 103 is exported high level, and red LED is luminous.Judge that when comparison module 102 current charged state is first charged state, the LED_G pin of display driver 103 is exported high level, and green LED is luminous.
Fig. 4 is the circuit theory diagrams of second embodiment of the state indicating section of charge condition display of the present invention.As shown in the figure, when chip internal comparison module 102 outputs second charged state, " LED_R " pin output low level, LED_G pin output high level, so red LED is bright, green LED does not work substantially or is little bright; When chip comparison module 102 outputs first charged state, " LED_R " pin output low level, " LED_R " pin output high level, green LED is bright, and red LED does not work substantially or is little bright.R1 is the current-limiting resistance of LED, and LED is for being total to positive LED.As shown in Figure 4, further comprise the high voltage startup module that is used to common positive LED that the startup high pressure is provided in the described charged state indication chip.
Fig. 5 is the circuit theory diagrams of the 3rd embodiment of the state indicating section of charge condition display of the present invention.As shown in Figure 5, judge that when comparison module 102 current charged state is second charged state, the LED_R pin output low level of display driver 103 is so red green LED is bright together; When chip comparison module 102 outputs first charged state, " LED_R " pin output high level, green LED is bright, and red LED does not work substantially or is little bright, as shown in Figure 5, further comprise the high voltage startup module that is used to common positive LED that the startup high pressure is provided in the described charged state indication chip.
Fig. 6 is the circuit theory diagrams of the 4th embodiment of the state indicating section of charge condition display of the present invention.As shown in Figure 6, display module 200 comprises a LED, resistance R 1, and the anode of described LED is connected to the LED pin that power supply VCC, negative electrode are connected to display driver 103 through resistance R 1.When comparison module 102 judges that current charged state is second charged state, the LED pin output low level of display driver 103, the LED lamp is bright, when comparison module 102 judges that current charged state is first charged state, the LED pin output high level of display driver 103, LED does not work.In another embodiment of the present invention, also can be provided with on the contrary.
In other embodiments of the invention, can be that red green is indicated charging output big electric current (second charged state) and little electric current (first charged state) respectively, also can be the LED flicker of a monochrome and do not glimmer indication charging big electric current of output and little electric current respectively.
Fig. 7 is the theory diagram that is suitable for first embodiment of the charge condition display of state indicating section among Fig. 3 or 4.In this embodiment, this charge condition display is applied in PWM control charging system.As shown in Figure 7, wherein, described detection module 101 comprises: sampling hold circuit 203 and error amplifier 204.Described comparison module 102 comprises comparator 207 and filter 208.Display driver 103 comprises first driver 209 and second driver 210, and described first driver 209 is connected to the LED_G of described charged state detection chip, and described second driver 210 is connected to the LED_R of described charged state detection chip
Wherein sampling hold circuit 203 is used for obtaining sample rate current from the feedback end FB of charged state detection chip 100.Error amplifier 204 is used for described sample rate current and the preset reference value compares and output is directly proportional with charging current voltage.This is because in the PWM control system, because the operating frequency of chip is constant, therefore, the charging current of charge power supply roughly is directly proportional with the output voltage of error amplifier 204.
In another embodiment of the present invention, the also voltage or the power signal of sampling hold circuit 203 sampling, error amplifier 204 converts thereof into the voltage that is directly proportional with charging current.Those skilled in the art know, can adopt different devices with voltage, electric current or power signal that different electrical signal conversion becomes to be directly proportional with charging current, send into comparator again and compare.And accordingly, also can suitably select the comparator of voltage, electric current or other signals of telecommunication for use.
When the output result of filter 208 was first charged state, first driver 209 of display driver 103 received described first status signal and drives green LED green light.When the output result of filter 208 was second charged state, second driver 215 of display driver 103 received described second status signal and drives red LED and glows.
In this embodiment, described charged state detection chip further comprises the PWM control unit, and described PWM control unit comprises PWM comparator 205 and PWM output driver module 206.The output of this PWM output driver module 206 is connected to the gate pole of described switching tube, is used to control the work of described switching tube.
Fig. 8 is the theory diagram that is suitable for second embodiment of the charge condition display of state indicating section among Fig. 3 or 4.In this embodiment, this charge condition display is applied in the PFM control charging system.Wherein detection module 101 comprises: frequency acquisition module 213 and frequency-electric signal transducer 201.Wherein said frequency acquisition module 213 is used to obtain the operating frequency of described charged state detection chip 100, and wherein said operating frequency is directly proportional with described charging current.Those skilled in the art are familiar with the various methods that can obtain operating frequency, and the whole bag of tricks can use at this.Frequency-electric signal transducer 201 can be used for described operating frequency and converts the signal of telecommunication that is directly proportional with described charging current to.Because in the PFM control system, the relation that the size of charging current is directly proportional with the operating frequency of chip itself, therefore, frequency-voltage converter 201 can be used for the operating frequency of chip is converted to and the proportional voltage of operating frequency, and this voltage is directly proportional with charging current, that is to say that the more little representative operating frequency of the output voltage of frequency-voltage converter 201 is low more, promptly charging current is more little.
When the output result of filter 208 was first charged state, first driver 204 of display driver 103 received described first status signal and drives green LED green light.When the output result of filter 208 was second charged state, second driver 205 of display driver 103 received described second status signal and drives red LED and glows.
Though be to represent first charged state and second charged state in this embodiment, with red green LED.But in other embodiments of the invention, can adopt diffusing bright and diffusing the glittering of a monochromatic LED to represent first charged state and second charged state.Also can adopt long bright or diffusing the glittering of monochromatic LED to represent first charged state and second charged state.According to instruction of the present invention, those skilled in the art can also adopt other method to distinguish different charged states, and these all fall into protection scope of the present invention.
In another embodiment of the present invention, described detection module 101 is frequency-current converters, and its operating frequency that can be used to the charged state detection chip 100 that will be directly proportional with charging current converts the electric current that is directly proportional with described charging current to.And this moment, comparator 202 can correspondingly adopt current comparator, its positive input is connected to the output of frequency-current converter, and reverse input end is connected to reference current, and then is used for the output current of frequency-current converter is compared with the reference current value of presetting.As long as set accurate reference current value, the output result of comparator 202 has just represented current charged state so.For the output result's that guarantees comparator 202 accuracy, filter 208 can be used to this output result is carried out low-pass filtering.In one embodiment of the invention, described reference current can be the 1-/10-1/8 of rated current.
Though frequency-electric signal transducer in the present invention describes with frequency-voltage and frequency-current converter respectively.But according to instruction of the present invention, those skilled in the art can know, also can adopt other the signal of telecommunication, the signal of telecommunication that is directly proportional with described charging current such as average power, real-time power etc., and set corresponding reference electrical signal and judge.
Fig. 9 is the theory diagram that is suitable for first embodiment of the charge condition display of state indicating section among Fig. 5 or 6.Figure 10 is the theory diagram that is suitable for second embodiment of the charge condition display of state indicating section among Fig. 5 or 6.As seen from the figure, Fig. 9 and Fig. 8 are similar substantially, and its difference is, in the display driver of Fig. 9, includes only driver 214, so it is applicable in Fig. 5 or 6, include only the display module of a LED.In like manner, Figure 10 and Fig. 7 are similar, and its difference is, in the display driver of Figure 10, include only and drive 219, so it is applicable in Fig. 5 or 6, include only the display module of a LED.
According to instruction of the present invention, those skilled in the art can make up each embodiment of the present invention mutually, use one or more LED to indicate charged state to satisfy.Though the present invention describes by specific embodiment, it will be appreciated by those skilled in the art that, without departing from the present invention, can also carry out various conversion and be equal to alternative the present invention.Therefore, the present invention is not limited to disclosed specific embodiment, and should comprise the whole execution modes that fall in the claim scope of the present invention.
Claims (10)
1. charger, comprise charge power supply and charge condition display, it is characterized in that, described charge condition display comprises the elementary winding of the transformer that is connected charge power supply and the charged state detection chip (100) between the ground and is used to show the display module (200) of charged state, wherein, described charged state detection chip (100) comprising:
Detection module (101) is used to detect the charge condition of charge power supply;
Comparison module (102) is used for judging current charged state according to described detected charge condition.
2. charger according to claim 1 is characterized in that, described charged state detection chip (100) further comprises:
Display driver (103) is used for driving described display module (200) according to described current charged state and shows described current charged state.
3. charger according to claim 2 is characterized in that, described detection module (101) comprising:
The frequency acquisition module is used to obtain the operating frequency of described charged state detection chip (100), and wherein said operating frequency is directly proportional with described charging current;
Frequency-electric signal transducer is used for described operating frequency and converts the signal of telecommunication that is directly proportional with described charging current to.
4. charger according to claim 2 is characterized in that, described detection module (101) comprising:
Sampling hold circuit is used for the elementary auxiliary winding sampling signal of telecommunication from described transformer;
Error amplifier is used for the signal of telecommunication with the described sampling signal of telecommunication compares with reference value and output is directly proportional with charging current.
5. according to claim 3 or 4 described chargers, it is characterized in that, described comparison module (102) comprises comparator (202) and filter (203), the positive input of wherein said comparator (202) is connected to described detection module (101) to obtain the signal of telecommunication that is directly proportional with described charging current, reverse input end is connected to reference electrical signal, output is connected to the input of described filter (203), and the output of described filter (203) is connected to described display driver (103) with the output charged state.
6. charger according to claim 5, it is characterized in that described display driver (103) comprises that being used to of being connected with the output of described filter (203) respectively drives first driver of described display module (200) demonstration first charged state and be used to drive second driver that described display module (200) shows second charged state.
7. charger according to claim 6, it is characterized in that, described display module (103) comprises a LED who is subjected to described first driver drives, the 2nd LED that is subjected to described second driver drives, and be connected to the anode of described first and second LED and the current-limiting resistance between the power supply, wherein, described first and second LED are for being total to positive LED.
8. charger according to claim 6, it is characterized in that, described display module (103) comprises a LED who is subjected to described first driver drives, the 2nd LED that is subjected to described second driver drives, and be connected to the negative electrode of described first and second LED and the current-limiting resistance between the ground, wherein, described first and second LED are for being total to cloudy LED.
9. charger according to claim 5, it is characterized in that, described display driver (103) comprise be connected with the output of described filter (203) be used to drive the 3rd driver that described display module (200) shows first charged state and second charged state respectively, described display module (103) comprises the 3rd LED that is subjected to described the 3rd driver drives, and is connected to the anode of described the 3rd LED and the current-limiting resistance between the power supply.
10. charge condition display, it is characterized in that, comprise elementary winding and charged state detection chip (100) between the ground that is connected transformer and the display module (200) that is used to show charged state, wherein, described charged state detection chip (100) comprising:
Detection module (101) is used to detect the charge condition of charge power supply;
Comparison module (102) is used for judging current charged state according to described detected charge condition.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910107536 CN101902054B (en) | 2009-05-26 | 2009-05-26 | Charging state indication device and charger |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910107536 CN101902054B (en) | 2009-05-26 | 2009-05-26 | Charging state indication device and charger |
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| CN101902054A true CN101902054A (en) | 2010-12-01 |
| CN101902054B CN101902054B (en) | 2012-12-26 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104269892A (en) * | 2014-08-01 | 2015-01-07 | Tcl通讯（宁波）有限公司 | Charging control method, charging control device and mobile terminal |
| CN104280655A (en) * | 2014-10-16 | 2015-01-14 | 惠州Tcl移动通信有限公司 | Mobile terminal charger removing detecting system and method |
| CN108565941A (en) * | 2018-06-07 | 2018-09-21 | 深圳市菱奇半导体有限公司 | A kind of charge control system and control method |
| CN111551811A (en) * | 2020-05-26 | 2020-08-18 | 无锡友达电子有限公司 | Detection circuit and device for output state of charging equipment and charging equipment |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1564421A (en) * | 2004-03-17 | 2005-01-12 | 毛锦铭 | Charger for lithium cell |
-
2009
- 2009-05-26 CN CN 200910107536 patent/CN101902054B/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104269892A (en) * | 2014-08-01 | 2015-01-07 | Tcl通讯（宁波）有限公司 | Charging control method, charging control device and mobile terminal |
| CN104269892B (en) * | 2014-08-01 | 2017-05-10 | Tcl通讯（宁波）有限公司 | Charging control method, charging control device and mobile terminal |
| CN104280655A (en) * | 2014-10-16 | 2015-01-14 | 惠州Tcl移动通信有限公司 | Mobile terminal charger removing detecting system and method |
| CN104280655B (en) * | 2014-10-16 | 2018-02-13 | 惠州Tcl移动通信有限公司 | Mobile terminal charger removes detecting system and its detection method |
| CN108565941A (en) * | 2018-06-07 | 2018-09-21 | 深圳市菱奇半导体有限公司 | A kind of charge control system and control method |
| CN111551811A (en) * | 2020-05-26 | 2020-08-18 | 无锡友达电子有限公司 | Detection circuit and device for output state of charging equipment and charging equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101902054B (en) | 2012-12-26 |
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