CN202267913U - Power supply management circuit for tablet computer - Google Patents
Power supply management circuit for tablet computer Download PDFInfo
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- CN202267913U CN202267913U CN2011203092219U CN201120309221U CN202267913U CN 202267913 U CN202267913 U CN 202267913U CN 2011203092219 U CN2011203092219 U CN 2011203092219U CN 201120309221 U CN201120309221 U CN 201120309221U CN 202267913 U CN202267913 U CN 202267913U
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Abstract
The utility model discloses a power supply management circuit for a tablet computer, which comprises a power supply chip U22 of PT1502 model. The power supply chip U22 is connected into a master control chip of the tablet computer and controlled by the master control chip to power each circuit of the tablet computer and manage power supply. The power supply management circuit for the tablet computer is simple in structure, easy to implement and capable of effectively adjusting voltage of each circuit in operation to improve integral performance of the tablet computer and guarantee operational normality of each circuit of the tablet circuit.
Description
Technical field
The utility model relates to the panel computer circuit field, is specially a kind of panel computer electric power management circuit.
Background technology
Panel computer is a kind of electronic product, have carry, advantage easy to use, enter in the daily life gradually.Panel computer generally is made up of governor circuit and peripheral other circuit etc.In the panel computer of prior art, power management is comparatively chaotic, causes in the panel computer partial circuit owing to the power supply reason can't operate as normal.
The utility model content
The utility model purpose provides a kind of panel computer electric power management circuit, to solve the chaotic problem of prior art panel computer power management.
In order to achieve the above object, the technical scheme that the utility model adopted is:
A kind of panel computer electric power management circuit comprises that model is the power supply chip U22 of PT1502, is characterized in that: the USB_IN pin of said power supply chip U22 is through capacitor C 49 ground connection; The USB_IN pin also inserts the panel computer main control chip, and the CHGIN pin of power supply chip U22 is introduced external power source DC_5V through diode D1, and the anode of said diode D1 is through resistance R 138 ground connection; The negative electrode of diode D1 is through capacitor C 43 ground connection; The CHGIN pin of power supply chip U22 also is connected with the CHG_STAT pin of power supply chip U22 through resistance R 141, and the AC_IN pin of power supply chip U22 is introduced external power source DC_5V, and the BAT pin of power supply chip U22 inserts the panel computer main control chip; The BAT pin is also through capacitor C 41 ground connection; The CHG_PROG pin of power supply chip U22 is through resistance R 143 ground connection, and PVDD pin, AVDD pin connect the back altogether and insert the panel computer main control chip, and GND pin, PGND pin, AGND pin connect back ground connection altogether; After connecing through resistance R 137 through resistance R 142, LDO2_SET0 pin altogether, the LDO2_SET1 pin of power supply chip U22 inserts the main control chip of panel computer again; Have two-way to draw lead on the LDOOUT2 pin of power supply chip U22, a pass goes out to be divided into two-way after lead is connected to diode D18, the main control chip of last one tunnel access panel computer of diode D18 on the LDOOUT2 pin; Diode D18 goes up another road through capacitor C 142 ground connection; Another pass goes out the main control chip that lead inserts panel computer on the LDOOUT2 pin, and another pass goes out lead also respectively through capacitor C 140, capacitor C 143 ground connection on the LDOOUT2 pin, and the LDOOUT1 pin of power supply chip U22 inserts the main control chip of panel computer; And the LDOOUT1 pin is also respectively through capacitor C 139, capacitor C 136 ground connection; The BUCKFB pin of power supply chip U22 is connected with the LX pin of power supply chip U22 through capacitor C 141, the inductance L 23 of series connection each other, has two-way to draw lead between capacitor C 141, the inductance L 23, and a pass goes out resistance R 139, resistance R 140 ground connection of lead through series connection each other between capacitor C 141, the inductance L 23; Another pass goes out lead and is connected to the parallel branch that is made up of capacitor C parallel with one another 138, capacitor C 137 between capacitor C 141, the inductance L 23; Draw node that lead is connected between said parallel branch and capacitor C 141, the inductance L 23 and also insert the main control chip of panel computer, another node ground connection of parallel branch, the PWR_HOLD pin of power supply chip U22 inserts the main control chip of panel computers through resistance R 136; The PWR_HOLD pin of power supply chip U22 is also through resistance R 146 ground connection; The PLAY_ON pin of power supply chip U22 is connected with the negative electrode of diode Q4, Q5 respectively, and the anode of said diode Q5 is through resistance R 145 ground connection, and the anode of diode Q5 also inserts the main control chip of panel computer through resistance R 144; The anode of said diode Q4 is introduced external power source DC_5V through resistance R 16, the RC circuit that capacitor C 53 constitutes, the resistance R 64 of connecting with said RC circuit; And the RC circuit ground that resistance R 16, capacitor C 53 constitute, the PLAY_ON pin of power supply chip U22 is also through resistance R 65 ground connection, and the RESET pin of power supply chip U22 is through resistance R 62, the button SW9 ground connection of series connection.
The utility model is simple in structure; Be easy to realize; Electric power management circuit inserts the main control chip of panel computer, through main control chip control electric power management circuit each circuit of panel computer is carried out power management, can adjust the voltage of each circuit in the work effectively; To improve the panel computer overall performance, guarantee that each circuit can operate as normal in the panel computer.
Description of drawings
Fig. 1 is the utility model circuit theory diagrams.
Embodiment
As shown in Figure 1.A kind of panel computer electric power management circuit comprises that model is the power supply chip U22 of PT1502, and the USB_IN pin of power supply chip U22 is through capacitor C 49 ground connection; The USB_IN pin also inserts the panel computer main control chip, and the CHGIN pin of power supply chip U22 is introduced external power source DC_5V through diode D1, and the anode of diode D1 is through resistance R 138 ground connection; The negative electrode of diode D1 is through capacitor C 43 ground connection; The CHGIN pin of power supply chip U22 also is connected with the CHG_STAT pin of power supply chip U22 through resistance R 141, and the AC_IN pin of power supply chip U22 is introduced external power source DC_5V, and the BAT pin of power supply chip U22 inserts the panel computer main control chip; The BAT pin is also through capacitor C 41 ground connection; The CHG_PROG pin of power supply chip U22 is through resistance R 143 ground connection, and PVDD pin, AVDD pin connect the back altogether and insert the panel computer main control chip, and GND pin, PGND pin, AGND pin connect back ground connection altogether; After connecing through resistance R 137 through resistance R 142, LDO2_SET0 pin altogether, the LDO2_SET1 pin of power supply chip U22 inserts the main control chip of panel computer again; Have two-way to draw lead on the LDOOUT2 pin of power supply chip U22, a pass goes out to be divided into two-way after lead is connected to diode D18, the main control chip of last one tunnel access panel computer of diode D18 on the LDOOUT2 pin; Diode D18 goes up another road through capacitor C 142 ground connection; Another pass goes out the main control chip that lead inserts panel computer on the LDOOUT2 pin, and another pass goes out lead also respectively through capacitor C 140, capacitor C 143 ground connection on the LDOOUT2 pin, and the LDOOUT1 pin of power supply chip U22 inserts the main control chip of panel computer; And the LDOOUT1 pin is also respectively through capacitor C 139, capacitor C 136 ground connection; The BUCKFB pin of power supply chip U22 is connected with the LX pin of power supply chip U22 through capacitor C 141, the inductance L 23 of series connection each other, has two-way to draw lead between capacitor C 141, the inductance L 23, and a pass goes out resistance R 139, resistance R 140 ground connection of lead through series connection each other between capacitor C 141, the inductance L 23; Another pass goes out lead and is connected to the parallel branch that is made up of capacitor C parallel with one another 138, capacitor C 137 between capacitor C 141, the inductance L 23; Draw node that lead is connected between said parallel branch and capacitor C 141, the inductance L 23 and also insert the main control chip of panel computer, another node ground connection of parallel branch, the PWR_HOLD pin of power supply chip U22 inserts the main control chip of panel computers through resistance R 136; The PWR_HOLD pin of power supply chip U22 is also through resistance R 146 ground connection; The PLAY_ON pin of power supply chip U22 is connected with the negative electrode of diode Q4, Q5 respectively, and the anode of said diode Q5 is through resistance R 145 ground connection, and the anode of diode Q5 also inserts the main control chip of panel computer through resistance R 144; The anode of diode Q4 is introduced external power source DC_5V through resistance R 16, the RC circuit that capacitor C 53 constitutes, the resistance R 64 of connecting with the RC circuit; And the RC circuit ground that resistance R 16, capacitor C 53 constitute, the PLAY_ON pin of power supply chip U22 is also through resistance R 65 ground connection, and the RESET pin of power supply chip U22 is through resistance R 62, the button SW9 ground connection of series connection.
Claims (1)
1. panel computer electric power management circuit comprises that model is the power supply chip U22 of PT1502, is characterized in that: the USB_IN pin of said power supply chip U22 is through capacitor C 49 ground connection; The USB_IN pin also inserts the panel computer main control chip, and the CHGIN pin of power supply chip U22 is introduced external power source DC_5V through diode D1, and the anode of said diode D1 is through resistance R 138 ground connection; The negative electrode of diode D1 is through capacitor C 43 ground connection; The CHGIN pin of power supply chip U22 also is connected with the CHG_STAT pin of power supply chip U22 through resistance R 141, and the AC_IN pin of power supply chip U22 is introduced external power source DC_5V, and the BAT pin of power supply chip U22 inserts the panel computer main control chip; The BAT pin is also through capacitor C 41 ground connection; The CHG_PROG pin of power supply chip U22 is through resistance R 143 ground connection, and PVDD pin, AVDD pin connect the back altogether and insert the panel computer main control chip, and GND pin, PGND pin, AGND pin connect back ground connection altogether; After connecing through resistance R 137 through resistance R 142, LDO2_SET0 pin altogether, the LDO2_SET1 pin of power supply chip U22 inserts the main control chip of panel computer again; Have two-way to draw lead on the LDOOUT2 pin of power supply chip U22, a pass goes out to be divided into two-way after lead is connected to diode D18, the main control chip of last one tunnel access panel computer of diode D18 on the LDOOUT2 pin; Diode D18 goes up another road through capacitor C 142 ground connection; Another pass goes out the main control chip that lead inserts panel computer on the LDOOUT2 pin, and another pass goes out lead also respectively through capacitor C 140, capacitor C 143 ground connection on the LDOOUT2 pin, and the LDOOUT1 pin of power supply chip U22 inserts the main control chip of panel computer; And the LDOOUT1 pin is also respectively through capacitor C 139, capacitor C 136 ground connection; The BUCKFB pin of power supply chip U22 is connected with the LX pin of power supply chip U22 through capacitor C 141, the inductance L 23 of series connection each other, has two-way to draw lead between capacitor C 141, the inductance L 23, and a pass goes out resistance R 139, resistance R 140 ground connection of lead through series connection each other between capacitor C 141, the inductance L 23; Another pass goes out lead and is connected to the parallel branch that is made up of capacitor C parallel with one another 138, capacitor C 137 between capacitor C 141, the inductance L 23; Draw node that lead is connected between said parallel branch and capacitor C 141, the inductance L 23 and also insert the main control chip of panel computer, another node ground connection of parallel branch, the PWR_HOLD pin of power supply chip U22 inserts the main control chip of panel computers through resistance R 136; The PWR_HOLD pin of power supply chip U22 is also through resistance R 146 ground connection; The PLAY_ON pin of power supply chip U22 is connected with the negative electrode of diode Q4, Q5 respectively, and the anode of said diode Q5 is through resistance R 145 ground connection, and the anode of diode Q5 also inserts the main control chip of panel computer through resistance R 144; The anode of said diode Q4 is introduced external power source DC_5V through resistance R 16, the RC circuit that capacitor C 53 constitutes, the resistance R 64 of connecting with said RC circuit; And the RC circuit ground that resistance R 16, capacitor C 53 constitute, the PLAY_ON pin of power supply chip U22 is also through resistance R 65 ground connection, and the RESET pin of power supply chip U22 is through resistance R 62, the button SW9 ground connection of series connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203092219U CN202267913U (en) | 2011-08-24 | 2011-08-24 | Power supply management circuit for tablet computer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203092219U CN202267913U (en) | 2011-08-24 | 2011-08-24 | Power supply management circuit for tablet computer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202267913U true CN202267913U (en) | 2012-06-06 |
Family
ID=46158699
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203092219U Expired - Fee Related CN202267913U (en) | 2011-08-24 | 2011-08-24 | Power supply management circuit for tablet computer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202267913U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104934957A (en) * | 2015-07-10 | 2015-09-23 | 上海斐讯数据通信技术有限公司 | POE switch lightning protection circuit |
| WO2019046448A1 (en) * | 2017-08-29 | 2019-03-07 | Texas Instuments Incorporated | Multi-chip integrated power management solution |
-
2011
- 2011-08-24 CN CN2011203092219U patent/CN202267913U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104934957A (en) * | 2015-07-10 | 2015-09-23 | 上海斐讯数据通信技术有限公司 | POE switch lightning protection circuit |
| WO2019046448A1 (en) * | 2017-08-29 | 2019-03-07 | Texas Instuments Incorporated | Multi-chip integrated power management solution |
| US11054878B2 (en) | 2017-08-29 | 2021-07-06 | Texas Instruments Incorporated | Synchronous power state control scheme for multi-chip integrated power management solution in embedded systems |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120606 Termination date: 20120824 |