CN202103442U - Mobile terminal and charge device - Google Patents
Mobile terminal and charge device Download PDFInfo
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- CN202103442U CN202103442U CN2011200221044U CN201120022104U CN202103442U CN 202103442 U CN202103442 U CN 202103442U CN 2011200221044 U CN2011200221044 U CN 2011200221044U CN 201120022104 U CN201120022104 U CN 201120022104U CN 202103442 U CN202103442 U CN 202103442U
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Abstract
The utility model relates to a mobile terminal and a charge device. The charge device comprises a charge interface and a power management chip. The power management chip comprises a first FET (Field Effect Transistor) connected between a battery and the charge interface, a temperature sensor used for detecting the temperature of the power management chip, a charge controller used for controlling the first FET, and a PWM (Pulse Width Modulator). The charge device further comprises a low-pass filter arranged outside the power management chip, a second FET, and a main controller, wherein the main controller connected with the temperature sensor is used for controlling the PWM to open when the detected temperature exceeds a preset temperature closing value and controlling the charge controller to open when the detected temperature does not exceeds a preset temperature opening value. By adopting the technical scheme, the charge time is not affected even though the temperature of the power management chip is constantly in a higher state.
Description
Technical field
The utility model relates to communication technical field, more particularly, relates to a kind of portable terminal and charging device thereof.
Background technology
Generally speaking, portable terminal (for example mobile phone) uses battery as power supply, and these batteries are chargeable, and adopting charging device usually is battery charge, so that it recycles repeatedly.Fig. 1 is the logic diagram of charging device of a kind of portable terminal of prior art, and this charging device comprises charging inlet and power management chip 100.Wherein, FET P1 mainly plays a part the adjustment charging current under the control of charge controller 101.Yet in this charging device, FET P1 along with the increase of charging current, can make the power consumption of FET P1 become big, thereby the heating of power management chip 100 is increased in charging process.In order to realize the heat protection of power management chip 100, its temperature inside transducer 103 can automatic signalling be given charge controller 101, the pressure drop between the grid source electrode of charge controller 101 meetings reduction FET P1, thus reduce the electric current that flows through FET P1.If the temperature of power management chip 100 is in higher state all the time, charging current will keep lower level always so, and this has had a strong impact on the charging interval of battery.
The utility model content
The technical problem that the utility model will solve is; To prior art above-mentioned if the temperature of power management chip can influence the defective in the charging interval of battery when being in higher state all the time; A kind of charging device of portable terminal is provided, even the temperature of power management chip is in the charging interval that higher state can not influence battery yet.
The utility model solves the technical scheme that its technical problem adopted: the charging device of constructing a kind of portable terminal; Be used to battery charge; This charging device comprises charging inlet and power management chip, and said power management chip comprises first FET that is connected between said battery and the said charging inlet, is used to detect the temperature sensor of power management chip temperature; And the charge controller of control first FET
Said power management chip also comprises the pulse width modulator that is used for output pwm signal;
Said charging device comprises that also to place said power management chip outside,
Be used for said pwm signal is converted to the low pass filter of direct voltage;
Second FET, the source electrode of said second FET links to each other with drain electrode with the source electrode of said first FET respectively with drain electrode, and the grid of said second FET connects the output of low pass filter; And
Be connected in said temperature sensor, be used for control pulse width modulator unlatching when the temperature that is detected surpasses preset temperature close value; The master controller that the control charge controller is opened when the temperature that is detected is no more than preset temperature unlatching value.
In the charging device of the described portable terminal of the utility model; Said charging device also comprises the 3rd FET; Said power management chip also comprises the cell switch controller that said the 3rd FET of control opens or closes, and wherein, the drain electrode of said the 3rd FET connects battery; The source electrode of said the 3rd FET connects the drain electrode of first FET and the drain electrode of second FET, and the source electrode of first FET is connected charging inlet with the source electrode of second FET.
In the charging device of the described portable terminal of the utility model; Said power management chip also comprises: be used to detect charging current current sensor, current comparator, voltage comparator, first multiplexer, the reference current source of predetermined current value is provided and the reference voltage source of predeterminated voltage value is provided; Wherein, The front end first via of first multiplexer connects the source electrode of the 3rd FET; The front end the second tunnel of said first multiplexer connects the drain electrode of the 3rd FET; The output of said first multiplexer connects the first input end of voltage comparator, and second input of said voltage comparator connects reference voltage source, and the output of said voltage comparator connects the first input end of charge controller; The first input end of current comparator connects current sensor; Second input of current comparator connects reference current source; The output of current comparator connects second input of said charge controller, and the output of charge controller connects the grid of first FET.
In the charging device of the described portable terminal of the utility model, said charging device also comprises sampling resistor, and said power management chip also comprises second multiplexer and analog to digital converter; Wherein, Said sampling resistor is connected between the source electrode of drain electrode and the 3rd FET of said second FET; The front end first via of said second multiplexer connects the drain electrode of said the 3rd FET, and the front end the second tunnel of said second multiplexer connects said current sensor, and the front end Third Road of said second multiplexer connects the source electrode of said the 3rd FET; The front end the four tunnel of said second multiplexer connects the source electrode of first FET; The front end the five tunnel of said second multiplexer connects first end of sampling resistor, and the front end the six tunnel of said second multiplexer connects second end of sampling resistor, the input of the output connection mode number converter of said second multiplexer; The output of said analog to digital converter connects the input of master controller, and the output of master controller connects the input of pulse width modulator.
In the charging device of the described portable terminal of the utility model, said charging device also comprises filter capacitor, and an end of said filter capacitor connects the drain electrode of said first FET, the second end ground connection of said filter capacitor.
In the charging device of the described portable terminal of the utility model, said power management chip also comprises the trickle module that is connected between battery and the charging inlet.
A kind of portable terminal is also constructed in this aspect, comprises battery and is the charging device of battery charge, and said charging device is above-mentioned charging device.
Implement the technical scheme of the utility model, when the temperature that detects power management chip when temperature sensor surpassed preset temperature close value, master controller was controlled second FET through pulse width modulator; When the temperature that detects power management chip when temperature sensor was no more than preset temperature unlatching value, the main controller controls charge controller was opened, so that charge controller is controlled first FET.And first FET and the parallel connection of second FET are provided with, so no matter the temperature of power management chip is high or low, always have one to open in first FET and second FET, this charging device can be charged smoothly for battery.Therefore, even when the temperature of power management chip is in higher state all the time, can not influence the charging interval yet.
Description of drawings
To combine accompanying drawing and embodiment that the utility model is described further below, in the accompanying drawing:
Fig. 1 is the logic diagram of charging device of a kind of portable terminal of prior art;
Fig. 2 is the logic diagram of the charging device embodiment one of the utility model portable terminal;
Fig. 3 is the logic diagram of the charging device embodiment two of the utility model portable terminal;
Fig. 4 is the flow chart of the charging device course of work of the utility model portable terminal.
Embodiment
As shown in Figure 2; In the logic diagram of the charging device embodiment one of the portable terminal of the utility model; This charging device is battery 400 chargings, and this charging device comprises charging inlet and power management chip 100, places low pass filter 301, the second FET P2 and the master controller 200 of power management chip 100 outsides.This power management chip 100 comprises the first FET P1, charge controller 101, pulse width modulator 102 and temperature sensor 103.Wherein, The second FET P2 and the first FET P1 are connected in parallel between charging inlet and the battery 400; Promptly; The source electrode of the source electrode of the second FET P2 and the first FET P1 connects charging inlet in the lump, and the drain electrode of the drain electrode of the second FET P2 and the first FET P1 connects battery 400 in the lump.Temperature sensor 103 is used to detect the temperature of power management chip 100, and testing result is sent to master controller 200.Master controller 200 is done comparison with the temperature that is detected and temperature unlatching value of presetting and preset temperature close value; And when the temperature that is detected surpasses preset temperature close value control pulse width modulator 102 output pwm signals; This pwm signal converts direct voltage to through low pass filter, and this direct voltage is controlled the second FET P2; Control charge controller 101 is opened so that it controls the first FET P1 when the temperature that is detected is no more than preset temperature unlatching value.Charge controller 101 and pulse width modulator 102 are when controlling the first FET P1 and the second FET P2 respectively; Can adjust the electric current between the drain-source utmost point of the first FET P1 and the second FET P2 through the gate-source voltage of regulating the first FET P1 or the second FET P2, thereby reach the purpose of adjustment charging current.When the temperature that is detected surpasses preset temperature close value; Master controller 200 can write relevant value with the low level counter register through the high level counter register in pulse width modulator 102; Make the pwm signal of the corresponding duty ratio of pulse width modulator 102 outputs, this pwm signal is used for controlling the gate-source voltage of the second FET P2 after low pass filter becomes direct voltage.
In the logic diagram of the charging device embodiment two of the portable terminal of the utility model shown in Fig. 3, this charging device comprises charging inlet and power management chip 100, place the power management chip 100 outside second FET P2, low pass filter 301, sampling resistor R1, filter capacitor C1, the 3rd FET P3 and master controller 200.This power management chip 100 comprises the first FET P1, charge controller 101, pulse width modulator 102, temperature sensor 103, cell switch controller 104, current sensor 105, current comparator 106, voltage comparator 107, first multiplexer 108, second multiplexer 109, analog to digital converter 110, trickle module 111, the reference current source (not shown) of predetermined current value IMAXSEL is provided and the reference voltage source (not shown) of predeterminated voltage value VMAXSEL is provided.Wherein, The source electrode of the source electrode of the first FET P1 and the second FET P2 connects charging inlet in the lump; The drain electrode of the second FET P2 connects the drain electrode of the first FET P1 through sampling resistor R1; The source electrode of the 3rd FET P3 connects the drain electrode of the first FET P1, and the drain electrode of the 3rd FET P3 connects battery 400.Filter capacitor C1 is connected between the source electrode and ground of the 3rd FET P3.The front end first via of first multiplexer 108 connects the source electrode of the 3rd FET P3; The front end the second tunnel of first multiplexer 108 connects the drain electrode of the 3rd FET P3; The output of first multiplexer 108 connects the first input end of voltage comparator 107; Second input of voltage comparator 107 connects reference voltage source, and the output of voltage comparator 107 connects the first input end of charge controller 101.Current sensor 105 is used to detect charging current.The first input end of current comparator 106 connects current sensor 105, and second input of current comparator 106 connects reference current source, and the output of current comparator 106 connects second input of charge controller 101.The output of charge controller 101 connects the grid of the first FET P1.The output of cell switch controller 104 connects the grid of the 3rd FET P3.The front end first via of second multiplexer 109 connects the drain electrode of the 3rd FET P3, is used to read cell voltage BAT; The front end the second tunnel of second multiplexer 109 connects current sensor, is used to read electric current I-SENS; The front end Third Road of second multiplexer 109 connects the source electrode of the 3rd FET P3, is used to read voltage VPH; The front end the four tunnel of second multiplexer 109 connects charging inlet, is used to read charging voltage VCHG; The front end the five tunnel of second multiplexer 109 connects first end of sampling resistor R1, is used to read voltage VMPP1; The front end the six tunnel of second multiplexer 109 connects second end of sampling resistor R1, is used to read voltage VMPP2; The input of the output connection mode number converter 110 of second multiplexer, the output of analog to digital converter 110 connects the first input end of master controller 200.Temperature sensor 103 is used to detect the temperature of power management chip, and it connects second input of master controller 200.First output of master controller 200 connects the input of pulse width modulator 102, and the output of pulse width modulator 102 connects the grid of the second FET P2 through low pass filter 301.Second output of master controller 200 connects charge controller 101.Trickle module 111 is connected between battery 400 and the charging inlet, before constant current charge and constant voltage charge, for battery carries out trickle charge.
The operation principle of this charging device is described below in conjunction with Fig. 3 and Fig. 4.At first begin, cell switch controller 104 controls the 3rd FET P3 opens.After beginning, get into step S401, close the second FET P2; Open the first FET P3, power management chip 100 is the control charging process automatically, promptly; Current sensor 105 detects charging current; And the charging current that is detected is sent to current comparator 106, charging current that current comparator 106 is relatively detected and preset current value I MAXSEL, and export comparative result to charge controller 101.First multiplexer 108 when full, selects the voltage VPH of the first via to export voltage comparator 107 in battery charge; First multiplexer 108 when full, selects the second tunnel voltage VBAT to export voltage comparator 107 in battery charge, can read the precision of battery terminal voltage so more accurately, makes the sampled voltage that exports voltage comparator 107 to more accurate.Voltage comparator 107 compares the charging voltage and preset magnitude of voltage VMAXSEL of being sampled, and exports comparative result to charge controller 101.The gate-source voltage of the charge controller 101 controls first FET P1.Then execution in step S402, temperature sensor 103 detects the temperature of power management chips 100, and master controller 200 judges whether the temperature that is detected surpasses preset temperature close value temp_stop, if not, execution in step S401 again; If, execution in step S403.In step S403, second multiplexer 109 is chosen the first via, reads cell voltage VBAT; The cell voltage VBAT that is read is after analog to digital converter 110 conversions; Export master controller 200 to, master controller 200 is judged the charged state of battery according to the cell voltage after changing, if the cell voltage that is read is less than the constant voltage value; Then be in the constant current charge stage, and then execution in step S404; If the cell voltage that is read is not less than the constant voltage value, then be in the constant voltage charge stage, and then execution in step S408.
In step S404, master controller 200 is through the gate-source voltage of the pulse width modulator 102 controls second FET P2, and then the control charging current.Then in step S405, second multiplexer 109 selects the five the road and the six the tunnel successively, reads the voltage VMPP1 and the VMPP2 at sampling resistor R1 two ends, and after analog to digital converter 110 conversions, master controller 200 calculates the electric current I R1 that flows through according to the voltage after changing.Then, in step S406, temperature sensor 103 detects the temperature of power management chips 100, and master controller 200 judges whether the temperature that is detected is no more than preset temperature unlatching value temp_resume, if, execution in step S401 again then; If not, execution in step S407 then.In step S407, judge the current value I MAXSEL whether the electric current I R1 calculated equals to preset, if not, execution in step S404 again; If, execution in step S408 then.
In step S408, master controller 200 is through the gate-source voltage of the pulse width modulator 102 controls second FET P2, and then the control charging current.Then in step S409, second multiplexer 109 is selected the first via, reads cell voltage VBAT.Execution in step S410 then, temperature sensor 103 detects the temperature of power management chips 100, and master controller 200 judges whether the temperature that is detected is no more than preset temperature unlatching value temp_resume; If; Execution in step S401 again then, if not, execution in step S411 then.In step S411, second multiplexer 110 is selected the first via, reads cell voltage VBAT; The cell voltage VBAT that is read is sent to master controller 200 after analog to digital converter 110 conversions, master controller 200 is judged the magnitude of voltage the VMAXSEL whether cell voltage after the conversion equals to preset; If not, execution in step S408 again then, if; Then cell switch controller 104 cuts out the 3rd FET P3, and charging is finished.
The utility model is also constructed a kind of portable terminal, comprises battery and charging device, and charging device is above-mentioned described charging device.
The preferred embodiment that the above is merely the utility model is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within the spirit and principle of the utility model, any modification of being done, be equal to replacement, improvement etc., all should be included within the claim scope of the utility model.
Claims (7)
1. charging device; Be used to battery (400) charging, this charging device comprises charging inlet and power management chip (100), and said power management chip (100) comprises first FET (P1) that is connected between said battery (400) and the said charging inlet; Be used to detect the temperature sensor (103) of power management chip (100) temperature; And the charge controller (101) of control first FET (P1), it is characterized in that
Said power management chip (100) also comprises the pulse width modulator (102) that is used for output pwm signal;
Said charging device comprises that also to place said power management chip (100) outside, is used for said pwm signal is converted to the low pass filter (301) of direct voltage;
Second FET (P2); The source electrode of said second FET (P2) links to each other with drain electrode with the source electrode of said first FET (P1) respectively with drain electrode, and the grid of said second FET (P2) connects the output of said low pass filter (301); And
Be connected in said temperature sensor (103), be used for control pulse width modulator (102) unlatching when the temperature that is detected surpasses preset temperature close value; The master controller (200) that control charge controller (101) is opened when the temperature that is detected is no more than preset temperature unlatching value.
2. charging device according to claim 1; It is characterized in that; Said charging device also comprises the 3rd FET (P3); Said power management chip (100) also comprises the cell switch controller (104) that said the 3rd FET of control (P3) opens or closes, and wherein, the drain electrode of said the 3rd FET (P3) connects battery (400); The source electrode of said the 3rd FET (P3) connects the drain electrode of first FET (P1) and the drain electrode of second FET (P2), and the source electrode of first FET (P1) is connected charging inlet with the source electrode of second FET (P2).
3. charging device according to claim 2; It is characterized in that; Said power management chip (100) also comprises: be used to detect charging current current sensor (105), current comparator (106), voltage comparator (107), first multiplexer (108), the reference current source of predetermined current value is provided and the reference voltage source of predeterminated voltage value is provided; Wherein, The front end first via of first multiplexer (108) connects the source electrode of the 3rd FET (P3); The front end the second tunnel of said first multiplexer (108) connects the drain electrode of the 3rd FET (P3); The output of said first multiplexer (108) connects the first input end of voltage comparator (107), and second input of said voltage comparator (107) connects reference voltage source, and the output of said voltage comparator (107) connects the first input end of charge controller (101); The first input end of current comparator (106) connects current sensor (105); Second input of current comparator (106) connects reference current source; The output of current comparator (106) connects second input of said charge controller (101), and the output of charge controller (101) connects the grid of first FET (P1).
4. charging device according to claim 3 is characterized in that, said charging device also comprises sampling resistor (R1), and said power management chip (100) also comprises second multiplexer (109) and analog to digital converter (110); Wherein, Said sampling resistor (R1) is connected between the source electrode of drain electrode and the 3rd FET (P3) of said second FET (P2); The front end first via of said second multiplexer (109) connects the drain electrode of said the 3rd FET (P3); The front end the second tunnel of said second multiplexer (109) connects said current sensor (105); The front end Third Road of said second multiplexer (109) connects the source electrode of said the 3rd FET (P3); The front end the four tunnel of said second multiplexer (109) connects the source electrode of first FET (P1); The front end the five tunnel of said second multiplexer (109) connects first end of sampling resistor (R1), and the front end the six tunnel of said second multiplexer (109) connects second end of sampling resistor (R1), the input of the output connection mode number converter (110) of said second multiplexer (109); The output of said analog to digital converter (110) connects the input of master controller (200), and the output of master controller (200) connects the input of pulse width modulator (102).
5. charging device according to claim 1; It is characterized in that; Said charging device also comprises filter capacitor (C1), and an end of said filter capacitor (C1) connects the drain electrode of said first FET (P1), the second end ground connection of said filter capacitor (C1).
6. charging device according to claim 1 is characterized in that, said power management chip (100) also comprises the trickle module (111) that is connected between battery (400) and the charging inlet.
7. a portable terminal comprises battery (400) and, it is characterized in that said charging device is each described charging device of claim 1-6 for the charging device of battery charge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200221044U CN202103442U (en) | 2011-01-24 | 2011-01-24 | Mobile terminal and charge device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200221044U CN202103442U (en) | 2011-01-24 | 2011-01-24 | Mobile terminal and charge device |
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| Publication Number | Publication Date |
|---|---|
| CN202103442U true CN202103442U (en) | 2012-01-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200221044U Expired - Fee Related CN202103442U (en) | 2011-01-24 | 2011-01-24 | Mobile terminal and charge device |
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| Country | Link |
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| CN (1) | CN202103442U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103166202A (en) * | 2012-09-20 | 2013-06-19 | 深圳市金立通信设备有限公司 | System and method for reducing heating value in mobile terminal charging |
| CN103296721A (en) * | 2013-05-29 | 2013-09-11 | 苏州市米想网络信息技术有限公司 | Mobile phone charging software |
| WO2021027768A1 (en) * | 2019-08-14 | 2021-02-18 | 上海爻火微电子有限公司 | Current measurement circuit for power channel, and electronic device |
-
2011
- 2011-01-24 CN CN2011200221044U patent/CN202103442U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103166202A (en) * | 2012-09-20 | 2013-06-19 | 深圳市金立通信设备有限公司 | System and method for reducing heating value in mobile terminal charging |
| CN103166202B (en) * | 2012-09-20 | 2015-06-24 | 深圳市金立通信设备有限公司 | System and method for reducing heating value in mobile terminal charging |
| CN103296721A (en) * | 2013-05-29 | 2013-09-11 | 苏州市米想网络信息技术有限公司 | Mobile phone charging software |
| WO2021027768A1 (en) * | 2019-08-14 | 2021-02-18 | 上海爻火微电子有限公司 | Current measurement circuit for power channel, and electronic device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120104 Termination date: 20200124 |
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| CF01 | Termination of patent right due to non-payment of annual fee |