CN112015254A - Power supply control circuit and electronic device using same - Google Patents
Power supply control circuit and electronic device using same Download PDFInfo
- Publication number
- CN112015254A CN112015254A CN201910453171.2A CN201910453171A CN112015254A CN 112015254 A CN112015254 A CN 112015254A CN 201910453171 A CN201910453171 A CN 201910453171A CN 112015254 A CN112015254 A CN 112015254A
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- CN
- China
- Prior art keywords
- power supply
- control circuit
- module
- electronic switch
- load unit
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
- G06F1/263—Arrangements for using multiple switchable power supplies, e.g. battery and AC
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
An electronic device comprises a power supply control circuit and a load unit. The power supply control circuit comprises a power supply module and a first driving module, wherein the first driving module is used for outputting power supply voltage with a first phase number according to the power supply voltage output by the power supply module so as to supply power for the load unit. The power supply control circuit further comprises a second driving module and a control circuit. The second driving module is electrically connected between the power supply module and the load unit and is used for outputting power supply voltage of a second phase number according to the power supply voltage output by the power supply module. The control circuit is electrically connected between the power module and the second drive module and used for switching on or off the connection between the power module and the second phase drive module according to the working state of the load unit. Therefore, the phase number of the power supply voltage can be controlled according to the working state of the load, and the power supply efficiency is improved.
Description
Technical Field
The invention relates to a power supply control circuit and an electronic device using the same.
Background
With the development of computer technology, the rated power of a Central Processing Unit (CPU) is increasing, and it is a common practice to meet the power supply requirement of high power by increasing the number of phases of a power supply voltage.
However, the computer will cause the cpu to generate different power consumptions in different operating states, and when the cpu operates at a low load, the power supply efficiency of the power supply will be affected by an excessive number of phases of the power supply voltage.
Disclosure of Invention
In view of the above, it is desirable to provide a power supply control circuit capable of controlling the number of phases of a power supply voltage according to an operating state of a load and an electronic device using the power supply control circuit.
A power supply control circuit comprises a power supply module and a first driving module, wherein the first driving module is used for outputting power supply voltage with a first phase number according to the power supply voltage output by the power supply module so as to supply power for a load unit, and the power supply control circuit further comprises:
the second driving module is electrically connected between the power supply module and the load unit and is used for outputting power supply voltage of a second phase number according to the power supply voltage output by the power supply module; and
the control circuit is electrically connected between the power module and the second drive module and used for switching on or switching off the connection between the power module and the second phase drive module according to the working state of the load unit.
Further, when the load unit is in a high-load working state, the control circuit conducts the connection between the power supply module and the second driving module; when the load unit is in a low-load working state, the control circuit disconnects the power module from the second driving module.
Furthermore, the control circuit includes a first electronic switch and a resistor, a first end of the first electronic switch is electrically connected to the load unit, a second end of the first electronic switch is electrically connected to the power supply through the resistor, a third end of the first electronic switch is grounded, and the first electronic switch is configured to obtain a state signal of the load unit and output a control signal according to the state signal.
Furthermore, the control circuit further includes a second electronic switch, a first end of the second electronic switch is electrically connected to a second end of the first electronic switch, a second end of the second electronic switch is electrically connected to the power module, a third end of the second electronic switch is electrically connected to the second driving module, and the second electronic switch is configured to turn on or turn off the connection between the power module and the second phase driving module according to the control signal.
Further, the first electronic switch is a P-channel enhancement type field effect transistor, and the second electronic switch is an N-channel enhancement type field effect transistor.
Furthermore, the first terminal, the second terminal and the third terminal of the first electronic switch respectively correspond to the gate, the drain and the source of the P-channel enhancement type field effect transistor field, and the first terminal, the second terminal and the third terminal of the second electronic switch respectively correspond to the gate, the drain and the source of the N-channel enhancement type field effect transistor field.
Further, the power supply voltage output by the power supply module is 12V or 5V.
An electronic device comprises a load unit and the power supply control circuit, wherein the power supply control circuit is electrically connected with the load unit and is used for supplying power to the load unit.
Further, the load unit is a central processing unit.
The power supply control circuit and the electronic device applying the power supply control circuit are connected or disconnected between the power module and the second driving module through the control circuit according to the working state of the load unit, so that the second driving module is controlled to output or not output the power supply voltage of the second phase number, and the phase number of the power supply voltage of the power supply control circuit to the load unit is increased or reduced. Therefore, the power supply efficiency is improved.
Drawings
FIG. 1 is a block diagram of an electronic device according to a preferred embodiment of the present invention.
Fig. 2 is a circuit diagram of a preferred embodiment of the power supply control circuit of fig. 1.
Description of the main elements
Power supply control circuit 100
Electronic switches Q1, Q2
Resistor R1
Power supply V1
Load cell 200
The following detailed description will further illustrate the invention in conjunction with the above-described figures.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the power supply control circuit and the electronic device using the power supply control circuit of the present invention will be described in further detail with reference to the accompanying drawings and embodiments.
Referring to fig. 1, in a preferred embodiment of the present invention, an electronic device 300 is provided, where the electronic device 300 includes a power supply control circuit 100 and a load unit 200. The power supply control circuit 100 is electrically connected to the load unit 200 to supply power to the load unit 200. In the present embodiment, the electronic device 300 is a computer motherboard, and the load unit 200 may be a Central Processing Unit (CPU).
The power supply control circuit 100 includes a power module 10, a first driving module 20, a second driving module 30 and a control circuit 40.
The power module 10 is electrically connected to the first driving module 20 and the second driving module 30. The first driving module 20 and the second driving module 30 are electrically connected to the load unit 200. The control circuit 40 is electrically connected between the power module 10 and the second driving module 30. The control circuit 40 is also electrically connected to the load unit 200.
The power module 10 is configured to output a power voltage to the first driving module 20 and the second driving module 30. The first driving module 20 is configured to output a first phase of supply voltage under the driving of the power supply voltage. The second driving module 30 is configured to output a supply voltage of a second phase number under the driving of the power supply voltage. The supply voltage of the first phase number and the supply voltage of the second phase number are used to supply power to the load unit 200.
In this embodiment, the supply voltage of the first phase may be a single-phase voltage, and the supply voltage of the second phase may be a two-phase voltage. In other embodiments, the first phase number and the second phase number may be increased or decreased correspondingly according to actual conditions.
The control circuit 40 is configured to turn on or turn off the connection between the power module 10 and the second driving module 30 according to the working state of the load unit 200, so as to control the second driving module 30 to output or not output the supply voltage of the second phase number, and further increase or decrease the voltage phase number supplied by the power supply control circuit 100 to the load unit 200.
Specifically, when the load unit 200 is in a high-load operating state, the control circuit 40 turns on the connection between the power module 10 and the second driving module 30 to increase the number of voltage phases supplied to the load unit 200 by the power supply control circuit 100.
When the load unit 200 is in a low-load operating state, the control circuit 40 disconnects the power module 10 from the second driving module 30, so as to reduce the number of voltage phases supplied by the power supply control circuit 100 to the load unit 200. In this way, the power supply control circuit 100 can control the number of phases of the power supply voltage according to the operating state of the load unit 200, thereby improving the power supply efficiency.
In this embodiment, the power supply voltage output by the power supply module 10 is 12V, and in other embodiments, the power supply voltage output by the power supply module 10 may be 5V.
Referring to fig. 2, fig. 2 is a circuit diagram of the control circuit 40 according to the present embodiment. The control circuit 40 includes two electronic switches Q1, Q2, and a resistor R1.
A first terminal of the electronic switch Q1 is electrically connected to the load unit 200. The second end of the electronic switch Q1 is electrically connected to the power supply V1 through the resistor R1. The third terminal of the electronic switch Q1 is grounded. The electronic switch Q1 obtains the state signal of the load unit through the first terminal of the electronic switch Q1 and outputs a control signal through the second terminal of the electronic switch Q1. A first terminal of the electronic switch Q2 is electrically connected with a second terminal of the electronic switch Q1. A second terminal of the electronic switch Q2 is electrically connected to the power module 10. The third terminal of the electronic switch Q2 is electrically connected to the second driving module 30. The electronic switch Q2 is used for turning on or off the connection between the power module 10 and the second driving module 30 according to the control signal.
In a preferred embodiment, the electronic switch Q1 is a P-channel enhancement mode fet and the electronic switch Q2 is an N-channel enhancement mode fet. The first, second and third terminals of the electronic switch Q1 correspond to the gate, drain and source of the P-channel enhancement mode fet field, respectively. The first, second and third terminals of the electronic switch Q2 correspond to the gate, drain and source of the N-channel enhancement mode fet field, respectively.
In this embodiment, the power supply V1 is used to output a 12V voltage. The resistance value of the resistor R1 is 10 kilo-ohms.
The operation of the power control circuit 100 according to the present invention will be described in detail.
In operation, when the load unit 200 is in a low-load operation state, the first terminal of the electronic switch Q1 will obtain a low-level state signal from the load unit 200, the low-level state signal will turn on the electronic switch Q1, so that the second terminal of the electronic switch Q1 outputs a low-level control signal, the electronic switch Q2 will turn off, so as to disconnect the connection between the power module 10 and the second driving module 30, and the second driving module 30 will not output the second phase supply voltage to supply power to the load unit 200. As such, the number of voltage phases that the power supply control circuit 100 supplies to the load unit 200 will be reduced.
When the load unit 200 is in a high-load operating state, the first terminal of the electronic switch Q1 will obtain a high-level state signal from the load unit 200, the high-level state signal will turn off the electronic switch Q1, the second terminal of the electronic switch Q1 outputs a high-level control signal, the electronic switch Q2 will turn on, so as to turn on the connection between the power module 10 and the second driving module 30, and the second driving module 30 will generate the second-phase supply voltage under the driving of the power voltage output by the power module 10 to supply power to the load unit 200. As such, the number of voltage phases that the power supply control circuit 100 supplies to the load unit 200 will be increased.
The power supply control circuit 100 controls the second driving module 30 to output or not output the power supply voltage of the second phase number by turning on or off the connection between the power supply module 10 and the second driving module 30 through the control circuit 40 according to the working state of the load unit 200, so as to increase or decrease the phase number of the power supply voltage of the power supply control circuit 100 to the load unit 200. Therefore, the power supply efficiency is improved.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and are not limited, although the present invention is described in detail with reference to the preferred embodiments.
It will be understood by those skilled in the art that various modifications and equivalent arrangements can be made without departing from the spirit and scope of the present invention.
Moreover, based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without any creative effort will fall within the protection scope of the present invention.
Claims (9)
1. A power supply control circuit comprises a power supply module and a first driving module, wherein the first driving module is used for outputting power supply voltage with a first phase number according to the power supply voltage output by the power supply module so as to supply power for a load unit, and the power supply control circuit is characterized by further comprising:
the second driving module is electrically connected between the power supply module and the load unit and is used for outputting power supply voltage of a second phase number according to the power supply voltage output by the power supply module; and
the control circuit is electrically connected between the power module and the second drive module and used for switching on or switching off the connection between the power module and the second phase drive module according to the working state of the load unit.
2. The power supply control circuit according to claim 1, wherein when the load unit is in a high-load operating state, the control circuit conducts the connection between the power supply module and the second driving module; when the load unit is in a low-load working state, the control circuit disconnects the power module from the second driving module.
3. The power supply control circuit according to claim 1, wherein the control circuit comprises a first electronic switch and a resistor, a first end of the first electronic switch is electrically connected to the load unit, a second end of the first electronic switch is electrically connected to a power supply through the resistor, a third end of the first electronic switch is grounded, and the first electronic switch is configured to obtain a state signal of the load unit and output a control signal according to the state signal.
4. The power supply control circuit of claim 3, wherein the control circuit further comprises a second electronic switch, a first terminal of the second electronic switch is electrically connected to a second terminal of the first electronic switch, a second terminal of the second electronic switch is electrically connected to the power module, a third terminal of the second electronic switch is electrically connected to the second driving module, and the second electronic switch is configured to turn on or off the connection between the power module and the second phase driving module according to the control signal.
5. The power supply control circuit of claim 4 wherein said first electronic switch is a P-channel enhancement mode FET and said second electronic switch is an N-channel enhancement mode FET.
6. The power supply control circuit of claim 5 wherein the first, second and third terminals of the first electronic switch correspond to the gate, drain and source, respectively, of the P-channel enhancement mode FET field and the first, second and third terminals of the second electronic switch correspond to the gate, drain and source, respectively, of the N-channel enhancement mode FET field.
7. The power supply control circuit according to claim 1, wherein the power supply voltage output by the power supply module is 12V or 5V.
8. An electronic device comprising a load unit and a power supply control circuit as claimed in any one of claims 1 to 7, the power supply control circuit being electrically connected to the load unit, the power supply control circuit being configured to supply power to the load unit.
9. The electronic device of claim 8, wherein the load unit is a central processing unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910453171.2A CN112015254B (en) | 2019-05-28 | 2019-05-28 | Power supply control circuit and electronic device applying same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910453171.2A CN112015254B (en) | 2019-05-28 | 2019-05-28 | Power supply control circuit and electronic device applying same |
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| Publication Number | Publication Date |
|---|---|
| CN112015254A true CN112015254A (en) | 2020-12-01 |
| CN112015254B CN112015254B (en) | 2023-08-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910453171.2A Active CN112015254B (en) | 2019-05-28 | 2019-05-28 | Power supply control circuit and electronic device applying same |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050088156A1 (en) * | 2003-10-27 | 2005-04-28 | Intersil Americas Inc. | Multi-channel driver interface circuit for increasing phase count in a multi-phase DC-DC converter |
| US20070262756A1 (en) * | 2006-05-01 | 2007-11-15 | Texas Instruments Incorporated | System and method for phase management in a multiphase switching power supply |
| US20110241640A1 (en) * | 2010-04-01 | 2011-10-06 | Intersil Americas Inc. | System and method of intermittent diode braking for multiple phase voltage regulator |
| TW201417469A (en) * | 2012-10-25 | 2014-05-01 | Hon Hai Prec Ind Co Ltd | Power supply circuit |
| CN103777729A (en) * | 2012-10-26 | 2014-05-07 | 鸿富锦精密工业（深圳）有限公司 | Power supply circuit |
-
2019
- 2019-05-28 CN CN201910453171.2A patent/CN112015254B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050088156A1 (en) * | 2003-10-27 | 2005-04-28 | Intersil Americas Inc. | Multi-channel driver interface circuit for increasing phase count in a multi-phase DC-DC converter |
| US20070262756A1 (en) * | 2006-05-01 | 2007-11-15 | Texas Instruments Incorporated | System and method for phase management in a multiphase switching power supply |
| US20110241640A1 (en) * | 2010-04-01 | 2011-10-06 | Intersil Americas Inc. | System and method of intermittent diode braking for multiple phase voltage regulator |
| TW201417469A (en) * | 2012-10-25 | 2014-05-01 | Hon Hai Prec Ind Co Ltd | Power supply circuit |
| CN103777729A (en) * | 2012-10-26 | 2014-05-07 | 鸿富锦精密工业（深圳）有限公司 | Power supply circuit |
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| Publication number | Publication date |
|---|---|
| CN112015254B (en) | 2023-08-15 |
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