CN207782448U - A kind of charging control circuit and electronic product - Google Patents
A kind of charging control circuit and electronic product Download PDFInfo
- Publication number
- CN207782448U CN207782448U CN201820049164.7U CN201820049164U CN207782448U CN 207782448 U CN207782448 U CN 207782448U CN 201820049164 U CN201820049164 U CN 201820049164U CN 207782448 U CN207782448 U CN 207782448U
- Authority
- CN
- China
- Prior art keywords
- charging
- switch
- unit
- control unit
- switching tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses a kind of charging control circuit and electronic product, charging control circuit includes temperature detecting unit, control unit, switch unit, charging chip；The charging current setting pin of charging chip is connect with multiple charging resistors respectively by switch unit, the break-make on switch unit control connecting line road, and the resistance value of multiple charging resistors is different；The charging pins of charging chip connect battery；Temperature detecting unit detects battery temperature, and detection signal is sent to control unit, and control unit is according to the break-make of the Signal-controlled switch unit received.The charging control circuit and electronic product of the utility model, control unit realize the switching of charging current according to the break-make for receiving detection Signal-controlled switch unit, the break-make of control charging current setting pin and the connection line of each charging resistor；Entire circuit structure is simple, and the component of use is less, reduces circuit cost, reduces circuit volume, is easy to implement, easy to utilize.
Description
Technical field
The utility model belongs to charging circuit technical field, specifically, being to be related to a kind of charging control circuit and electronics
Product.
Background technology
The charging modes of electronic product battery generally comprise large current charge and low current charge two ways.Two kinds of chargings
Mode needs according to circumstances to switch over, to be suitable for actually using.
But current charging modes switching circuit design comparison is complicated, component is not only of high cost using more, and
And cause small product size larger.And product miniaturization is a development trend of current electronic product, this requires volumes to want small.
Therefore, current switching circuit is unsatisfactory for the requirement of Current electronic product.
Moreover, battery temperature is different, it is desirable that charging current it is also different, and current switching circuit does not consider battery
The influence of temperature.
Invention content
The utility model provides a kind of charging control circuit, simplifies circuit structure, reduces circuit volume.
In order to solve the above-mentioned technical problem, the utility model is achieved using following technical scheme：
A kind of charging control circuit, including temperature detecting unit, control unit, switch unit, charging chip；The charging
The charging current setting pin of chip is connect with multiple charging resistors respectively by switch unit, the switch unit control connection
The resistance value of the break-make of circuit, the multiple charging resistor is different；The charging pins of the charging chip connect battery, for electricity
It charges in pond；The temperature detecting unit detects battery temperature, and detection signal is sent to control unit, described control unit root
According to the break-make of the Signal-controlled switch unit received.
Further, the switch unit includes multiple switch pipe, the quantity of the switching tube and the quantity of charging resistor
Equal, the switching tube is corresponded with charging resistor；One end connection charging chip of the switch ways of the switching tube fills
Pin is arranged in electric current, and the other end is grounded by corresponding charging resistor, the control terminal connection control unit of the switching tube
Controlling switch.
Further, the quantity of the controlling switch of described control unit and the quantity of switching tube are equal, and the control is drawn
Foot is corresponded with switching tube；The control terminal of the switching tube connects corresponding controlling switch.
Further, there are two the charging resistor settings：First charging resistor and the second charging resistor, the switch
There are two pipe settings：First switch pipe and second switch pipe；The first switch pipe is low high conduction voltage drop switching tube, described
Second switch pipe is high/low conduction voltage drop switching tube, and the same control of the control terminal connection control unit of two switching tubes is drawn
Foot.
Further, there are two the charging resistor settings：First charging resistor and the second charging resistor；The switch
Unit is analog switch, and the Enable Pin of the analog switch connects control unit, and the ends NC of the analog switch are filled by first
The ends NO of electric resistance eutral grounding, the analog switch are grounded by the second charging resistor, the ends the COM connection charging of the analog switch
Pin is arranged in the charging current of chip.
Preferably, the switching tube is NMOS tube or NPN triode.
Preferably, the first switch pipe is PMOS tube, and the second switch pipe is NMOS tube；Alternatively, described first opens
It is NMOS tube to close pipe, and the second switch pipe is PMOS tube.
Based on the design of above-mentioned charging control circuit, the utility model also proposed a kind of electronic product, including described
Charging control circuit.
Compared with prior art, the advantages of the utility model and good effect is：The charging control circuit of the utility model
And electronic product, temperature detecting unit detect battery temperature, detection signal are sent to control unit, control unit is according to reception
Control signal is generated to detection signal, switch unit is sent to, controls the break-make of switch unit, to control charging current setting
The break-make of pin and the connection line of each charging resistor, and then realize the switching of charging current；Moreover, entire circuit knot
Structure is simple, and the component of use is less, reduces circuit cost, reduces circuit volume, is easy to implement, easy to utilize.
After the detailed description of the utility model embodiment is read in conjunction with the figure, other features and advantages of the utility model
It will become clearer.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of the embodiment for the charging control circuit that the utility model is proposed；
Fig. 2 is a kind of circuit diagram of the embodiment for the charging control circuit that the utility model is proposed；
Fig. 3 is the circuit diagram of another embodiment of the charging control circuit that the utility model is proposed；
Fig. 4 is the circuit diagram of another embodiment for the charging control circuit that the utility model is proposed.
Specific implementation mode
Specific embodiment of the present utility model is described in more detail below in conjunction with the accompanying drawings.
The present embodiment proposes a kind of charging control circuit, includes mainly temperature detecting unit, control unit, switch list
Member, charging chip etc., it is shown in Figure 1, the charging current of charging chip setting pin ISET by switch unit respectively with it is more
A charging resistor connection, the break-make on switch unit control connecting line road, the resistance value of multiple charging resistors are different；Charging chip
Charging pins connect battery, for battery charge；Temperature detecting unit detects battery temperature, and battery temperature detection signal is sent out
It send to control unit, control unit is according to the break-make of the Signal-controlled switch unit received.
Charging chip is the size of the charging current of battery charging, and pin ISET, which is arranged, according to charging current is configured,
If pin ISET is grounded by resistance R, the size of charging current is KIset/R, KIsetFor charging chip charging current because
Number is the known intrinsic parameter of charging chip.In the present embodiment, temperature detecting unit is temperature sensor.
The charging control circuit of the present embodiment, temperature detecting unit detect battery temperature, and detection signal is sent to control
Unit, control unit generate control signal according to detection signal is received, are sent to switch unit, control the logical of switch unit
It is disconnected, to control the break-make of charging current setting pin ISET and the connection line of each charging resistor, and then realize charging electricity
Flow the switching of size；Therefore, the charging control circuit of the present embodiment, control unit are output control signals to out according to detection signal
Unit is closed, realization realizes according to battery temperature the setting of the different charging resistors of charging chip to switch charging current
Switch the size of charging current；Moreover, simplify circuit structure, the component that entire circuit uses is less, reduce circuit at
This, reduces circuit volume, is easy to implement, easy to utilize；Charging control circuit is applied in electronic product, electricity is met
The small requirement of sub- small product size.
In the present embodiment, switch unit includes multiple switch pipe, and the quantity of switching tube is equal with the quantity of charging resistor,
Switching tube is corresponded with charging resistor；One end connection charging current setting pin ISET of the switch ways of switching tube, it is another
End is grounded by corresponding charging resistor, the controlling switch of the control terminal connection control unit of switching tube.Each switch controlled
The break-make of the pin ISET and the connection line of corresponding charging resistor of charging chip.
The detection signal that control unit is sent according to temperature detecting unit controls corresponding switching tube conducting, and then controls
The pin ISET of charging chip is connected to corresponding charging resistor, and then switches charging current, realizes charging chip using corresponding
Charging current be battery charging.By controlling the break-make of each switching tube, switching charging current is realized, control is simple, is convenient for
It realizes.
In the present embodiment, the quantity of the controlling switch of control unit and the quantity of switching tube are equal, controlling switch with open
Pipe is closed to correspond；The control terminal of switching tube connects corresponding controlling switch.Control unit is sent according to temperature detecting unit
Signal is detected, corresponding controlling switch output control signal is controlled, to control corresponding switching tube conducting, and then controls charging
The pin ISET of chip is connected to corresponding charging resistor, and then switches charging current, is realized that charging chip uses and is filled accordingly
Electric current charges for battery.
In the present embodiment, there are two charging resistor settings：The resistance of first charging resistor R1 and the second charging resistor R2, R1
Resistance value of the value less than R2.The present embodiment can switch two kinds of charging currents according to battery temperature.For example, when battery temperature is more than ginseng
Examine temperature（Such as 20 °）When, the charging current setting pin ISET of charging chip is connect with R1, and charging current is larger, realizes big electricity
Stream is that battery charges；When battery temperature ＜ reference temperatures, the charging current setting pin ISET of charging chip is connect with R2, is filled
Electric current is smaller, realizes that low current charges for battery.
As another preferred design of the present embodiment, switch unit may be analog switch U3, control is simple,
It is easy to implement.The pin IO1 of the Enable Pin EN connection control units U1 of analog switch U3, and Enable Pin EN passes through pull down resistor R5
Ground connection；The ends NC of analog switch（The ends Normal Close, normal-closed end）Pass through the first charging resistor R1 ground connection, the NO of analog switch
End（The ends Normal Open, normally open end）Pass through the second charging resistor R2 ground connection, the ends COM of analog switch（Common end）Connection is filled
The charging current setting pin ISET of electrical chip U2, it is shown in Figure 2.
The battery temperature detected detection signal is sent to control unit by temperature detecting unit, when the battery temperature received
When degree detection signal ＞ reference temperature signals, the pin IO1 of control unit U1 exports low level, the ends the COM connection of analog switch
The ends NC, pin ISET are connect with R1, charging current KIset/ R1。
When battery temperature detects signal ＜ reference temperature signals, the pin IO1 of control unit U1 exports high level, simulation
The ends the COM ends connection NO of switch, pin ISET are connect with R2, charging current KIset/ R2。
Pass through the control signal of the pin IO1 outputs of control unit, you can realize the switching of two different valued resistors, it is real
The switching of existing two kinds of different charging currents, application is simple and convenient, convenient for control.
Comparator is provided in control unit, the normal phase input end of comparator connects reference temperature signal, comparator
Inverting input connects temperature detecting unit, receives battery temperature and detects signal, the output end connection pin IO1 of comparator.When
When the battery temperature detection signal ＞ reference temperature signals of temperature detecting unit conveying, the output end output low level of comparator is extremely
Pin IO1, pin IO1 export low level control signal；When the battery temperature detection signal ＜ ginsengs of temperature detecting unit conveying
When examining temperature signal, the output end of comparator exports high level to pin IO1, the control signal of pin IO1 output high level.
Below by a specific circuit diagram, concrete operating principle when including two switching tubes to switch unit carries out
It is described in detail.
Shown in Figure 3, there are two charging resistor settings：First charging resistor R1 and the second charging resistor R2, switching tube
There are two settings：First switch pipe Q1, second switch pipe Q2；First switch pipe Q1 is low conduction voltage drop switching tube PMOS, second
Switching tube Q2 is high conduction voltage drop switching tube NMOS, the same control of the control terminal grid connection control unit U1 of two switching tubes
Pin IO1 processed.
The source electrode of the charging current setting pin ISET connecting valve pipes Q1 of charging chip U2, the drain electrode of Q1 are connect by R1
Ground, the pin IO1 of the grid connection control unit U1 of Q1.
The drain electrode of the charging current setting pin ISET connecting valve pipes Q2 of charging chip U2, the source electrode of Q2 are connect by R2
Ground, the pin IO1 of the grid connection control unit U1 of Q2.
When battery temperature detects signal ＞ reference temperature signals, the pin IO1 of control unit U1 exports low level, control
Q1 conductings, Q2 shutdowns, therefore, the pin ISET of charging chip is connect with R1, charging current KIset/ R1 。
When battery temperature detects signal ＜ reference temperature signals, the pin IO1 of control unit U1 exports high level, control
Q1 shutdowns, Q2 conductings, therefore, the pin ISET of charging chip is connect with R2, charging current KIset/ R2。
Signal is controlled by the low and high level of the pin IO1 outputs of control unit, controls the break-make of switching tube Q1, Q2, from
And realize the switching of charging current, application is simple and convenient, convenient for control.
Certainly, first switch pipe Q1 may be that high conduction voltage drop switching tube NMOS tube, second switch pipe Q2 may be
Low conduction voltage drop switching tube PMOS tube.
Shown in Figure 4 as another preferred design of the present embodiment, there are two charging resistor settings：R3、
R4；The resistance value of R3, R4 are different；There are two switching tube settings：Q3, Q4 are NMOS tube；The controlling switch of control unit U1 is arranged
There are two：IO3、IO4.
The drain electrode of the charging current setting pin ISET connecting valve pipes Q3 of charging chip U2, the source electrode of Q3 are connect by R3
Ground, the pin IO3 of the grid connection control unit U1 of Q3.
The drain electrode of the charging current setting pin ISET connecting valve pipes Q4 of charging chip U2, the source electrode of Q4 are connect by R4
Ground, the pin IO4 of the grid connection control unit U1 of Q4.
When battery temperature detects signal ＞ reference temperature signals, pin IO3 outputs high level, the pin of control unit U1
IO4 exports low level, and control Q3 conductings, Q4 shutdowns, therefore, the pin ISET of charging chip is connect with R3, and charging current is
KIset /R3。
When battery temperature detects signal ＜ reference temperature signals, the pin IO3 outputs low level of control unit U1, pin
IO4 exports high level, and control Q3 shutdowns, Q4 conductings, therefore, the pin ISET of charging chip is connect with R4, and charging current is
KIset /R4。
Switching tube Q3 and Q4 can also select the realizations such as PMOS tube, NPN triode, PNP triode.
When there are other various configurations to require charging current, the switching tube in switch unit can be increased as requested
Quantity, to reach use charging chip when, by control circuit realize different charging currents switching adjust.
Based on the design of above-mentioned charging control circuit, the present embodiment also proposed a kind of electronic product, the electronic product
Including battery and the charging control circuit, the charging chip in the control circuit charges for battery.
By designing the charging control circuit in electronic product, charge for the battery to electronic product,
Charging current can be switched according to battery temperature, ensure battery charging safety；And circuit structure is simple, small, at low cost,
The volume for reducing electronic product reduces the cost of electronic product.
Certainly, the above description is not intended to limit the present invention, and the utility model is also not limited to the example above,
The variations, modifications, additions or substitutions that those skilled in the art are made in the essential scope of the utility model,
It should also belong to the protection scope of the utility model.
Claims (8)
1. a kind of charging control circuit, it is characterised in that：Including temperature detecting unit, control unit, switch unit, charging core
Piece；
The charging current setting pin of the charging chip is connect with multiple charging resistors respectively by switch unit, the switch
The break-make on unit control connecting line road, the resistance value of the multiple charging resistor are different；The charging pins of the charging chip
Battery is connected, is charged for battery；
The temperature detecting unit detects battery temperature, and detection signal is sent to control unit, described control unit according to
The break-make of the Signal-controlled switch unit received.
2. circuit according to claim 1, it is characterised in that：The switch unit includes multiple switch pipe, the switch
The quantity of pipe is equal with the quantity of charging resistor, and the switching tube is corresponded with charging resistor；
Pin is arranged in the charging current of one end connection charging chip of the switch ways of the switching tube, and the other end passes through corresponding
Charging resistor is grounded, the controlling switch of the control terminal connection control unit of the switching tube.
3. circuit according to claim 2, it is characterised in that：The quantity and switching tube of the controlling switch of described control unit
Quantity it is equal, the controlling switch and switching tube correspond；The control terminal of the switching tube connects corresponding controlling switch.
4. circuit according to claim 2, it is characterised in that：There are two the charging resistor settings：First charging resistor
With the second charging resistor, there are two the switching tube settings：First switch pipe and second switch pipe；
The first switch pipe is low high conduction voltage drop switching tube, and the second switch pipe is high/low conduction voltage drop switching tube,
The same controlling switch of the control terminal connection control unit of two switching tubes.
5. circuit according to claim 1, it is characterised in that：There are two the charging resistor settings：First charging resistor
With the second charging resistor；The switch unit is analog switch, and the Enable Pin of the analog switch connects control unit, the mould
The ends NC of quasi- switch are grounded by the first charging resistor, and the ends NO of the analog switch are grounded by the second charging resistor, described
Pin is arranged in the charging current of the ends the COM connection charging chip of analog switch.
6. circuit according to claim 3, it is characterised in that：The switching tube is NMOS tube or NPN triode.
7. circuit according to claim 4, it is characterised in that：The first switch pipe is PMOS tube, the second switch
Pipe is NMOS tube；
Alternatively, the first switch pipe is NMOS tube, the second switch pipe is PMOS tube.
8. a kind of electronic product, it is characterised in that：It include the circuit as described in any one of claim 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820049164.7U CN207782448U (en) | 2018-01-12 | 2018-01-12 | A kind of charging control circuit and electronic product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820049164.7U CN207782448U (en) | 2018-01-12 | 2018-01-12 | A kind of charging control circuit and electronic product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207782448U true CN207782448U (en) | 2018-08-28 |
Family
ID=63212477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820049164.7U Active CN207782448U (en) | 2018-01-12 | 2018-01-12 | A kind of charging control circuit and electronic product |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207782448U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023197265A1 (en) * | 2022-04-14 | 2023-10-19 | 京东方科技集团股份有限公司 | Display driving circuit and display device |
-
2018
- 2018-01-12 CN CN201820049164.7U patent/CN207782448U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023197265A1 (en) * | 2022-04-14 | 2023-10-19 | 京东方科技集团股份有限公司 | Display driving circuit and display device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103683348B (en) | There is the electronic installation of power consumption detecting function | |
| CN102904291B (en) | Charging device and control method | |
| CN203135390U (en) | Over-current protection circuit and electronic apparatus | |
| CN104836196B (en) | A kind of current foldback circuit of delayed startup | |
| JP2011501295A5 (en) | ||
| CN101677022A (en) | Leakage compensation for sample and hold devices | |
| CN103684407B (en) | Otg | |
| CN103605017A (en) | Detection method of vehicle switch quantity signal | |
| CN207782448U (en) | A kind of charging control circuit and electronic product | |
| CN107809228A (en) | A kind of on-off circuit | |
| CN103683178A (en) | Data center equipment and over-current and under-voltage protection circuit thereof | |
| CN109743036A (en) | A kind of calibration circuit and method | |
| CN105515787A (en) | Network port and Ethernet device | |
| CN109090710B (en) | Atomizer resistance detection circuitry | |
| CN104703110A (en) | Horn state diagnosis circuit | |
| CN208707309U (en) | Equipment for the DC current in on-off DC wire | |
| CN104635569A (en) | Multi-module time sequence control circuit | |
| CN102857719A (en) | Power supply control system and power supply control method | |
| CN106166990B (en) | A kind of startup power supply circuit | |
| CN107690813B (en) | The power supply circuit of earphone and earphone | |
| CN205945008U (en) | Circuit overcurrent protect device | |
| CN103955161B (en) | A kind of supervisory circuit and electronic equipment | |
| CN109739801A (en) | A kind of serial port level chance-over circuit between MCU chip and SOC chip | |
| CN109753100A (en) | A kind of current limliting output dynamic regulating circuit | |
| CN102012452B (en) | Method, device and circuit for detecting alternating voltage |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |