CN217063332U - Power management circuit of portable mobile device - Google Patents
Power management circuit of portable mobile device Download PDFInfo
- Publication number
- CN217063332U CN217063332U CN202220038882.0U CN202220038882U CN217063332U CN 217063332 U CN217063332 U CN 217063332U CN 202220038882 U CN202220038882 U CN 202220038882U CN 217063332 U CN217063332 U CN 217063332U
- Authority
- CN
- China
- Prior art keywords
- pin
- chip
- resistor
- power management
- module
- 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
Images
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model provides a portable mobile device's power management circuit, including USB interface, charge-discharge module, energy storage module, detection module and DCDC module. The USB interface is connected with an external power supply, the charging and discharging module is connected with the output end of the USB interface, the energy storage module is connected with the output end of the charging and discharging module, the detection module is respectively connected with the energy storage module and the charging and discharging module, the DC-DC module is respectively connected with the MCU of the mobile device and the charging and discharging module, and the detection module and the MCU carry out signal transmission through I2C.
Description
Technical Field
The utility model relates to an electronic circuit field, in particular to portable mobile device's power management circuit.
Background
Many electronic products all embed in our daily life has the lithium cell, need charge after the electric quantity exhausts, the lithium cell generally all charges through USB, with regard to present lithium cell, the lithium cell is charged while giving system MCU (load) power supply during charging, be in the state of charging while supplying power, the length of time that such charging mode will prolong greatly and charge, can't satisfy people's demand of charging fast, therefore, different charging mode can influence the efficiency of charging and electronic product's normal use.
In view of this, it is important to reasonably distribute the charging and discharging processes by using effective lithium battery charging and discharging path management.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a portable mobile device's power management circuit.
The utility model discloses it is the problem of rational distribution lithium cell charge-discharge process to solve.
In order to solve the problem, the utility model discloses a following technical scheme realizes:
a power management circuit for a portable mobile device, comprising:
the USB interface is connected with an external power supply;
the charge-discharge module is connected with the output end of the USB interface;
the energy storage module is connected with the output end of the charge and discharge module;
the detection module is respectively connected with the energy storage module and the charge-discharge module and is used for detecting the electric quantity of the energy storage module and transmitting the electric quantity to the charge-discharge module;
the DCDC module is respectively connected with the MCU of the mobile equipment and the charging and discharging module and is used for converting the output voltage of the charging and discharging module into a voltage suitable for the MCU and supplying power to the MCU;
the detection module and the MCU are in signal transmission through I2C.
Furthermore, the charge and discharge module comprises a power management chip, the power management chip adopts BQ24075RGTR, 13 pins of the power management chip are connected with the output end of the USB interface, and after being connected, 10 pins and 11 pins of the power management chip are connected with the input end of the DCDC module; the pins 2 and 3 of the power management chip are connected and then connected with the detection module; and the pin 1 of the power management chip is connected with the energy storage module.
Further, the charge-discharge module further comprises a charge indication circuit, wherein the charge indication circuit comprises a light emitting diode LED2 and a resistor R17 which are sequentially connected between the 7 pin and the 10 pin of the power management chip, and a light emitting diode LED 3-level resistor R18 which is sequentially connected between the 9 pin and the 10 pin of the power management chip; the cathode of the light-emitting diode LED2 is connected with the 7 pin of the power management chip, and the cathode of the light-emitting diode LED3 is connected with the 9 pin of the power management chip; and a pin 7 of the power management chip is connected with the output end of the DCDC module through a resistor R15, and a pin 9 of the power management chip is connected with the output end of the DCDC module through a resistor R16.
Furthermore, the charge-discharge module further comprises an enabling circuit, wherein the enabling circuit comprises a resistor R28 and a resistor R31 which are respectively connected with the 6 pins of the power management chip, and a resistor R27 and a resistor R30 which are respectively connected with the 5 pins of the power management chip; the other ends of the resistor R28 and the resistor R27 are connected with the output end of the DCDC module, and the other ends of the resistor R31 and the resistor R30 are connected and then grounded.
Further, the detection module comprises an electricity meter chip, the electricity meter chip adopts BQ27220YZFR, and an SCL pin of the electricity meter chip and an MCU of the mobile device perform signal transmission through I2C; the SRN pin of the electricity meter chip is connected with the 3 pins of the power management chip, and the BAT pin and the BIN pin of the electricity meter chip are both connected with the energy storage module; the SRN pin of the electricity meter chip is connected with the BAT pin of the electricity meter chip through a resistor R19, and the SRP pin of the electricity meter chip is connected with the BAT pin.
Further, the detection module further comprises a resistor R20 connected to a pin of the fuel gauge chip GPOUT, a resistor R13 connected to a pin of the fuel gauge chip SCL, and a resistor R14 connected to a pin of the fuel gauge chip SDA; and the other ends of the resistor R20, the resistor R13 and the resistor R14 are connected with the output end of the DCDC module.
Further, the energy storage module comprises a battery connector which adopts GWT-CF-0798-03, wherein 3 pins of the battery connector are connected with a lithium battery pack of the mobile equipment, and 2 pins of the battery connector are connected with a BIN pin of the electricity meter chip and a 1 pin of the power management chip; and the 4 pins and the 5 pins of the battery connector are connected and then grounded, and the 1 pin of the battery connector is grounded.
Furthermore, the DCDC module includes a power chip, the power chip adopts MP1652GTF-Z, pin 1 of the power chip is connected to pin 10 of the power management chip, a resistor R2 and a capacitor C4 are connected in series between pin 4 and pin 2 of the power chip, pin 2 of the power chip is connected to an inductor L1 and a resistor R5 which are connected in series, and pin 6 of the power chip is connected to a resistor R7 and a resistor R8 which are connected in series and then connected to a common end of the inductor L1 and the resistor R5; the other end of the resistor R5 is an output end of the DCDC module.
Furthermore, a first capacitor bank is connected between pin 1 of the power supply chip and pin 10 of the power supply management chip, and the other end of the capacitor bank is grounded; still be connected with the second electric capacity group between 2 feet and the 3 feet of power chip, 3 feet ground connection of power chip.
Furthermore, the output end of the DCDC module is connected to the resistor R9 and the LED1 and then grounded, and the cathode of the LED1 is grounded and the anode of the LED 9 is connected to the resistor R9.
Compared with the prior art, the utility model discloses technical scheme and beneficial effect as follows:
(1) the utility model discloses, take lithium battery route charge-discharge management, provide the removal power supply management that more is fit for the portable, the lithium cell is then in complete charged state when charging, and charging efficiency is high, and charging time quantum can satisfy the demand that people filled soon.
(2) The current input into the power management chip can be adjusted by adjusting the matched resistance of the power management chip, so that the user can design and use the power management chip more conveniently.
(3) The utility model discloses a power management circuit has protect function to reverse current, short circuit and overheated the wait condition.
Drawings
Fig. 1 is a block diagram of a power management circuit of a portable mobile device according to an embodiment of the present invention in a charging state;
fig. 2 is a block diagram illustrating a power management circuit of a portable mobile device according to an embodiment of the present invention when an external power source is not connected;
fig. 3 is a schematic circuit diagram of a charge-discharge module according to an embodiment of the present invention;
fig. 4 is a schematic circuit diagram of a detection module according to an embodiment of the present invention;
fig. 5 is a schematic circuit diagram of an energy storage module according to an embodiment of the present invention;
fig. 6 is a schematic circuit diagram of a DCDC module according to an embodiment of the present invention;
fig. 7 is a schematic circuit diagram of a USB interface according to an embodiment of the present invention.
Detailed Description
To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the attached drawings in the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and obviously, the described embodiments are part of the embodiments of the present invention, rather than all embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.
Referring to fig. 1, a power management circuit of a portable mobile device includes a USB interface, a charge-discharge module, an energy storage module, a detection module, and a DCDC module. The USB interface is connected with an external power supply, the charging and discharging module is connected with the output end of the USB interface, the energy storage module is connected with the output end of the charging and discharging module, the detection module is respectively connected with the energy storage module and the charging and discharging module, the DC-DC module is respectively connected with the MCU of the mobile device and the charging and discharging module, and the detection module and the MCU carry out signal transmission through I2C.
When the external power supply is connected, the external 5V power supply is connected to the charge-discharge module through the USB interface, then the external power supply is divided into two paths for supplying power, one path charges the aluminum battery through the charge-discharge module, the real-time electric quantity of the lithium battery is acquired constantly through the detection module, the electric quantity information is fed back to the charge-discharge module, the electric quantity information is transmitted to the MCU of the mobile device through the I2C, and the electric quantity is controlled and displayed through the MCU. The other path is output to the DCDC module through the charge-discharge module, and supplies power to the MCU (load) after voltage conversion of the DCDC module. If the detection module detects that the lithium battery is full, the charge-discharge module stops supplying power to the lithium battery and only outputs the power to the DCDC module, and if the detection module detects that the lithium battery is full, quick charging is achieved.
Referring to fig. 2, when the external power source is not connected, the lithium battery discharges to the charge and discharge module, and then the charge and discharge module outputs the voltage to the DCDC module to perform voltage conversion and supply the voltage to the MCU, and meanwhile, the DCDC module supplies power to the detection module and supplies power to a part of circuits of the charge and discharge module, and the detection module detects the electric quantity of the lithium battery in real time and transmits the electric quantity to the MCU to inform a user.
Referring to fig. 3 to 6, the embodiment provides a specific implementation circuit of a power management circuit of a portable mobile device. The charging and discharging module comprises a power management chip BQ24075RGTR, the detecting module comprises a fuel gauge chip BQ27220YZFR, the DCDC module comprises a power chip MP1652GTF-Z, and the energy storage module comprises a battery connector GWT-CF-0798-03.
Referring to fig. 3, pin 13 of the power management chip U2 is connected to the output terminal of the USB interface, pin 10 and pin 11 of the power management chip U2 are connected to pin 1 of the power chip U1, pin 2 and pin 3 of the power management chip U2 are connected to pin SRN of the fuel gauge chip U3, and pin 1 of the power management chip U1 is connected to pin 2 of the battery connector.
The charging and discharging module further comprises a charging indicating circuit which comprises a light-emitting diode LED2 and a resistor R17 which are sequentially connected between a pin 7 and a pin 10 of the power management chip U2, and a light-emitting diode LED 3-level resistor R18 which is sequentially connected between a pin 9 and a pin 10 of the power management chip U2. The cathode of the LED2 is connected to pin 7 of the power management chip U2, and the cathode of the LED3 is connected to pin 9 of the power management chip U2. The pin 7 of the power management chip U2 is connected with the output end of the DCDC module through a resistor R15, and the pin 9 of the power management chip U2 is connected with the output end of the DCDC module through a resistor R16. When the LED2 is on, it means that the applied voltage is within the normal range, and when the LED3 is on, it means that charging is started, and when the charging is saturated or the external power source is removed (no matter whether the charging is full), the LED3 is dark.
The charge-discharge module further comprises an enabling circuit, wherein the enabling circuit comprises a resistor R28 and a resistor R31 which are respectively connected with the pin 6 of the power management chip U2, and a resistor R27 and a resistor R30 which are respectively connected with the pin 5 of the power management chip U2. The other ends of the resistor R28 and the resistor R27 are connected with the output end of the DCDC module, and the other ends of the resistor R31 and the resistor R30 are connected and then grounded. When the enable pin 6 and the enable pin 5 of the power management chip U2 input different high and low levels, the power management chip U2 controls the input of currents of different magnitudes, and the output current automatically adjusts the current value according to the magnitude of the rear-end load.
Referring to fig. 4, the SCL pin of the electricity meter chip U3 and the MCU of the mobile device perform signal transmission through I2C. The SRN pin of the electricity meter chip U3 is connected with the 3 pins of the power management chip U2, the BAT pin of the electricity meter chip U3 is connected with the 3 pins of the battery connector, and the BIN pin of the electricity meter chip U3 is connected with the 2 pins of the battery connector. The SRN pin of the electricity meter chip U3 is connected with the BAT pin of the electricity meter chip U3 through a resistor R19, the SRP pin of the electricity meter chip U3 is connected with the BAT pin, when the lithium battery is connected, the electric quantity of the lithium battery is collected through a resistor R19, and then the electricity meter chip U3 transmits the electric quantity data of the lithium battery to the MCU through a communication mode of I2C.
The detection module further comprises a resistor R20 connected to a GPOUT pin of the electricity meter chip U3, a resistor R13 connected to an SCL pin of the electricity meter chip U3, and a resistor R14 connected to an SDA pin of the electricity meter chip U3; and the other ends of the resistor R20, the resistor R13 and the resistor R14 are connected with the output end of the DCDC module.
Referring to fig. 5, pin 3 of the battery connector is connected to the lithium battery pack of the mobile device, and pin 2 of the battery connector is connected to pin BIN of the electricity meter chip U3 and pin 1 of the power management chip; the 4 pins and the 5 pins of the battery connector are connected and then grounded, and the 1 pin of the battery connector is grounded.
Referring to fig. 6, pin 1 of the power chip U1 is connected to pin 10 of the power management chip U2, pin 4 and pin 2 of the power chip U1 are connected in series to a resistor R2 and a capacitor C4, pin 2 of the power chip U1 is connected to a resistor R5 and a resistor L1 which are connected in series, and pin 6 of the power chip is connected to a resistor R7 and a resistor R8 which are connected in series and then connected to a common terminal of the inductor L1 and the resistor R5. And the other end of the resistor R5 is the output end of the DCDC module.
A first capacitor bank, namely capacitors C1, C2 and C3, is also connected between pin 1 of the power chip and pin 10 of the power management chip, and the other end of the first capacitor bank is grounded. A second capacitor group, namely capacitors C6, C7, C10 and C11, is also connected between pins 2 and 3 of the power chip U1, and pin 3 of the power chip U1 is grounded. The two ends of the resistor R8 are connected in parallel with a capacitor C5, a capacitor C9 is connected between the pin 6 and the pin 3 of the power chip U1, the common end of the resistor R7 and the resistor R8 is also connected with a resistor R10, and the other end of the resistor R10 is connected with the pin 3 of the power chip U1.
One end of the resistor R5, which is far away from the inductor L1, is connected with the resistor R9 and the LED1 and then is grounded, the cathode of the LED1 is grounded, and the anode of the LED1 is connected with the resistor R9, so that the LED1 lights up when the DCDC module works normally.
Referring to fig. 7, the embodiment further provides a specific implementation circuit of the USB interface. A voltage stabilizing diode and a filter capacitor are connected to a port of the USB connected with an external power supply, so that the quality of the power supply input to the power supply management chip U2 is improved.
While the foregoing specification illustrates and describes the preferred embodiments of the present invention, it is to be understood that the invention is not limited to the precise forms disclosed herein and is not to be considered as exclusive of other embodiments, but rather is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, either in the above teachings or as known in the relevant art. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A power management circuit for a portable mobile device, comprising:
the USB interface is connected with an external power supply;
the charge-discharge module is connected with the output end of the USB interface;
the energy storage module is connected with the output end of the charging and discharging module;
the detection module is respectively connected with the energy storage module and the charge-discharge module and is used for detecting the electric quantity of the energy storage module and transmitting the electric quantity to the charge-discharge module;
the DCDC module is respectively connected with the MCU of the mobile equipment and the charging and discharging module, and is used for converting the output voltage of the charging and discharging module into a voltage suitable for the MCU and supplying power to the MCU;
the detection module and the MCU are in signal transmission through I2C.
2. The power management circuit of the portable mobile device of claim 1, wherein the charging and discharging module comprises a power management chip, the power management chip employs BQ24075RGTR, pin 13 of the power management chip is connected to the output terminal of the USB interface, and pin 10 and pin 11 of the power management chip are connected to the input terminal of the DCDC module; the pins 2 and 3 of the power management chip are connected and then connected with the detection module; and the pin 1 of the power management chip is connected with the energy storage module.
3. The power management circuit of claim 2, wherein the charge-discharge module further comprises a charge indication circuit, and the charge indication circuit comprises a light-emitting diode (LED) 2 and a resistor R17 sequentially connected between pins 7 and 10 of the power management chip, and a light-emitting diode (LED) 3-stage resistor R18 sequentially connected between pins 9 and 10 of the power management chip; the cathode of the light-emitting diode LED2 is connected with the 7 pin of the power management chip, and the cathode of the light-emitting diode LED3 is connected with the 9 pin of the power management chip; and a pin 7 of the power management chip is connected with the output end of the DCDC module through a resistor R15, and a pin 9 of the power management chip is connected with the output end of the DCDC module through a resistor R16.
4. The power management circuit of claim 3, wherein the charge-discharge module further comprises an enable circuit, the enable circuit comprises a resistor R28 and a resistor R31 respectively connected to 6 pins of the power management chip, a resistor R27 and a resistor R30 respectively connected to 5 pins of the power management chip; the other ends of the resistor R28 and the resistor R27 are connected with the output end of the DCDC module, and the other ends of the resistor R31 and the resistor R30 are connected and then grounded.
5. The power management circuit of claim 2, wherein the detection module comprises a fuel gauge chip, the fuel gauge chip employs a BQ27220YZFR, and an SCL pin of the fuel gauge chip is in signal transmission with an MCU of the mobile device through I2C; the SRN pin of the electricity meter chip is connected with the 3 pins of the power management chip, and the BAT pin and the BIN pin of the electricity meter chip are both connected with the energy storage module; the SRN pin of the electricity meter chip is connected with the BAT pin of the electricity meter chip through a resistor R19, and the SRP pin of the electricity meter chip is connected with the BAT pin.
6. The power management circuit of claim 5, wherein the detection module further comprises a resistor R20 connected to a GPOUT pin of the fuel gauge chip, a resistor R13 connected to an SCL pin of the fuel gauge chip, a resistor R14 connected to an SDA pin of the fuel gauge chip; and the other ends of the resistor R20, the resistor R13 and the resistor R14 are connected with the output end of the DCDC module.
7. The power management circuit of the portable mobile device according to claim 5, wherein the energy storage module comprises a battery connector, the battery connector adopts GWT-CF-0798-03, 3 pins of the battery connector are connected to a lithium battery pack of the mobile device, and 2 pins of the battery connector are connected to a BIN pin of the electricity meter chip and a 1 pin of the power management chip; and the 4 pins and the 5 pins of the battery connector are connected and then grounded, and the 1 pin of the battery connector is grounded.
8. The power management circuit of claim 2, wherein the DCDC module includes a power chip, the power chip is MP1652GTF-Z, pin 1 of the power chip is connected to pin 10 of the power management chip, a resistor R2 and a capacitor C4 are connected in series between pin 4 and pin 2 of the power chip, pin 2 of the power chip is connected to an inductor L1 and a resistor R5 which are connected in series, and pin 6 of the power chip is connected to a resistor R7 and a resistor R8 which are connected in series and then connected to a common terminal of the inductor L1 and the resistor R5; the other end of the resistor R5 is an output end of the DCDC module.
9. The power management circuit of claim 8, wherein a first capacitor bank is further connected between pin 1 of the power chip and pin 10 of the power management chip, and the other end of the first capacitor bank is grounded; and a second capacitor bank is also connected between the pin 2 and the pin 3 of the power chip, and the pin 3 of the power chip is grounded.
10. The power management circuit of claim 9, wherein the output terminal of the DCDC module is connected to ground after being connected to the resistor R9 and the light emitting diode LED1, and the cathode of the light emitting diode LED1 is connected to ground and the anode of the light emitting diode LED1 is connected to the resistor R9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220038882.0U CN217063332U (en) | 2022-01-07 | 2022-01-07 | Power management circuit of portable mobile device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220038882.0U CN217063332U (en) | 2022-01-07 | 2022-01-07 | Power management circuit of portable mobile device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217063332U true CN217063332U (en) | 2022-07-26 |
Family
ID=82480462
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220038882.0U Active CN217063332U (en) | 2022-01-07 | 2022-01-07 | Power management circuit of portable mobile device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217063332U (en) |
-
2022
- 2022-01-07 CN CN202220038882.0U patent/CN217063332U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209389733U (en) | Lithium battery protection board | |
| CN201409013Y (en) | Power supply adaptor | |
| CN110323801A (en) | A kind of energy-storage system battery module equalizing structure and control method | |
| CN201219206Y (en) | Multifunctional portable energy storing device | |
| CN205319726U (en) | Safe hot plug formula battery supply system | |
| CN104767243B (en) | A kind of charging method and device and charging circuit and the charging system with the circuit | |
| CN217063332U (en) | Power management circuit of portable mobile device | |
| CN201226449Y (en) | Voltage-boosting type charge control circuit and electronic device | |
| CN104333083A (en) | Online maintenance system of distributed power supply | |
| CN105305572A (en) | Safe hot plugging type battery supply system | |
| CN206559065U (en) | Condition prompting circuit and portable charged energy storage device are filled soon | |
| CN201846098U (en) | Charge and discharge protecting device and battery device | |
| CN101227095A (en) | Solar cell mobile phone charger | |
| CN101241169A (en) | Accumulator on-line test device | |
| CN203800648U (en) | Multifunctional backup power supply | |
| CN2372816Y (en) | Accumulator protector | |
| CN220325322U (en) | Mobile power supply integrating automobile emergency starting function | |
| CN201000480Y (en) | Accumulator online testing device | |
| CN217335137U (en) | Power supply device applied to light supplementing equipment | |
| CN203037826U (en) | Lithium battery charging tester | |
| CN212992028U (en) | Stack type energy storage auxiliary power supply system | |
| CN202916424U (en) | Cell guard plate | |
| CN207234418U (en) | A kind of power storage discharges system | |
| CN219046430U (en) | Compatible solar energy input digital display energy storage power charger | |
| CN216819409U (en) | Energy storage system and main energy storage device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |