CN115940626A - Power supply control circuit, method, electronic equipment and storage medium - Google Patents
Power supply control circuit, method, electronic equipment and storage medium Download PDFInfo
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- CN115940626A CN115940626A CN202310076444.2A CN202310076444A CN115940626A CN 115940626 A CN115940626 A CN 115940626A CN 202310076444 A CN202310076444 A CN 202310076444A CN 115940626 A CN115940626 A CN 115940626A
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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
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- 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
The application provides a power control circuit, a power control method, an electronic device and a storage medium. The power supply control circuit includes: the control unit is used for controlling the conduction state of the first voltage division unit, the second voltage division unit or the third voltage division unit according to an input control signal; the first voltage division unit is used for adjusting the output voltage of the power supply control circuit to be a first voltage; the second voltage division unit is used for adjusting the output voltage of the power supply control circuit to be a second voltage; and the third voltage division unit is used for adjusting the output voltage of the power supply control circuit to be a third voltage. The power supply control method is applied to the power supply control circuit. The electronic equipment comprises the power supply control circuit. A computer program stored on a storage medium executes the above power supply control method. The embodiment of the application only uses a common voltage reduction circuit chip, and the output voltage can be adjusted, so that the effects of no need of expensive chips of specific models and design cost reduction are achieved.
Description
Technical Field
The present disclosure relates to electronic circuit technologies, and in particular, to a power control circuit, a power control method, an electronic device, and a storage medium.
Background
At present, many electronic device manufacturers propose products meeting their specifications for electronic products produced by themselves. For example, for chips produced by some manufacturers, under different working states, the power supply can provide three different voltages to supply power to the chips through the control of the tri-state GPIO signals. The normal BUCK circuit (BUCK circuit) cannot achieve this function and a specific controller that meets the manufacturer's specifications must be used. The control price for meeting specific specifications is often very expensive and the corresponding product design is not flexible enough.
Disclosure of Invention
The present application has been made keeping in mind at least one of the above problems occurring in the prior art. According to an aspect of the present application, there is provided a power control circuit, including a control unit, a first voltage division unit, a second voltage division unit, and a third voltage division unit, wherein the control unit is connected to the first voltage division unit, the second voltage division unit, and the third voltage division unit, respectively;
the control unit is used for controlling the conduction state of the first voltage division unit, the second voltage division unit or the third voltage division unit according to an input control signal;
the first voltage division unit is used for adjusting the output voltage of the power supply control circuit after being conducted so as to enable the output voltage of the power supply control circuit to be a first voltage;
the second voltage division unit is used for adjusting the output voltage of the power supply control circuit after being conducted so as to enable the output voltage of the power supply control circuit to be a second voltage;
and the third voltage division unit is used for adjusting the output voltage of the power supply control circuit after being conducted so as to enable the output voltage of the power supply control circuit to be a third voltage.
In some embodiments, the control unit comprises a first comparator, a second comparator, and a switching unit; wherein the content of the first and second substances,
the first comparator comprises a first input terminal, a second input terminal and a first output terminal, wherein the first input terminal and the second input terminal respectively receive a first input voltage and a first reference voltage, and the first output terminal outputs a first output signal according to a comparison result between the first input voltage and the first reference voltage; wherein the first input voltage is generated according to the input control signal;
the second comparator includes a third input terminal, a fourth input terminal, and a second output terminal, the first input terminal and the second input terminal respectively receive a second input voltage and a second reference voltage, and the second output terminal outputs a second output signal according to a comparison result between the second input voltage and the second reference voltage; wherein the second input voltage is generated according to the input control signal;
the switch unit receives the first output signal and the second output signal, and the switch module controls and switches the conduction states of the first voltage division unit, the second voltage division unit and the third voltage division unit according to the first output signal and the second output signal.
In some embodiments, the switching unit includes a first switching element and a second switching element; wherein the first output signal controls a switching state of the first switching element, and the second output signal controls a switching state of the second switching element.
In some embodiments, the first voltage division unit outputs the first voltage when the first switching element is turned on and the second switching element is turned off; or
When the first switching element is turned off and the second switching element is turned off, the second voltage division unit outputs the second voltage; or
The third voltage division unit outputs the third voltage when the first switching element is turned off and the second switching element is turned on.
In some embodiments, the first voltage dividing unit includes a first resistor, a second resistor, and a third resistor, wherein a first end of the first resistor is connected to a first end of the second resistor, a second end of the first resistor is connected to the output end of the power control circuit, a second end of the second resistor is grounded, a first end of the third resistor is connected to the first switching element, and a second end of the third resistor is connected to the second end of the first resistor;
the second voltage division unit comprises the first resistor and the second resistor, wherein the first end of the first resistor is connected with the first end of the second resistor, the second end of the first resistor is connected with the output end of the power supply control circuit, and the second end of the second resistor is grounded;
the third voltage division unit comprises the first resistor, the second resistor and a fourth resistor, wherein the first end of the first resistor is connected with the first end of the second resistor, the second end of the first resistor is connected with the output end of the power control circuit, the second end of the second resistor is grounded, the first end of the fourth resistor is connected with the first end of the second resistor, and the second end of the fourth resistor is connected with the second switch element.
In some embodiments, the first voltage division unit outputs the first voltage when the first switching element is turned on and the second switching element is turned off; or
When the first switching element is turned off and the second switching element is turned off, the second voltage division unit outputs the second voltage; or
The third voltage division unit outputs the third voltage when the first switching element is turned off and the second switching element is turned on.
In some embodiments, the first voltage dividing unit includes a first resistor and a second resistor, wherein a first end of the first resistor is connected to a first end of the second resistor, a second end of the first resistor is connected to the output end of the power control circuit, and a second end of the second resistor is grounded;
the second voltage division unit comprises the first resistor, the second resistor and a third resistor, wherein a first end of the first resistor is connected with a first end of the second resistor, a second end of the first resistor is connected with an output end of the power supply control circuit, a second end of the second resistor is grounded, a first end of the third resistor is connected with a first end of the first resistor, and a second end of the third resistor is connected with the first switching element;
the third voltage division unit comprises the first resistor, the second resistor, the third resistor and a fourth resistor, wherein the first end of the first resistor is connected with the first end of the second resistor, the second end of the first resistor is connected with the output end of the power control circuit, the second end of the second resistor is grounded, the first end of the fourth resistor is connected with the first end of the second resistor, and the second end of the fourth resistor is connected with the second switch element.
In some embodiments, the first switching element and the second switching element each comprise a metal-oxide semiconductor field effect transistor.
Another aspect of the embodiments of the present application provides a power control method, where the method includes:
the comparison unit receives an input control signal;
the comparison unit generates a first input voltage and a second input voltage according to the input control signal;
the comparison unit generates a first output signal and a second output signal according to the first input voltage and the second input voltage respectively;
the switch unit receives the first output signal and the second output signal and controls the conduction state of the first voltage division unit, the second voltage division unit or the third voltage division unit according to the first output signal and the second output signal;
when the first voltage division unit is conducted, the power supply control circuit outputs a first voltage; when the second voltage division unit is conducted, the power supply control circuit outputs a second voltage; and when the third voltage division unit is conducted, the power supply control circuit outputs a third voltage.
In another aspect, an electronic device is provided, where the electronic device includes the power control circuit described above.
A further aspect of the embodiments of the present application provides a storage medium, on which a computer program is stored, the computer program, when executed by a processor, causes the processor to execute the power supply control method as described above.
The power supply control circuit, the power supply control method, the electronic device and the storage medium control the conduction state of the first voltage division unit and the second voltage division unit or the third voltage division unit through the control unit, so that the first voltage division unit outputs first voltage after being conducted, the second voltage division unit outputs second voltage after being conducted, the third voltage division unit outputs third voltage after being conducted, the chip with expensive specific model can be omitted, only the common BUCK circuit (BUCK circuit) chip is used, the size of the output voltage can be adjusted, and the effect of reducing the design cost is achieved.
Drawings
Fig. 1 shows a schematic diagram of a power supply control circuit according to the conventional art;
FIG. 2 shows a schematic block diagram of a power control circuit according to one embodiment of the present application;
FIG. 3 shows a circuit schematic of a power control circuit according to one embodiment of the present application;
FIG. 4 shows a circuit schematic of a power control circuit according to another embodiment of the present application;
FIG. 5 shows a schematic flow diagram of a power control method according to one embodiment of the present application.
Detailed Description
For those skilled in the art to better understand the technical solutions of the embodiments of the present application, the present application will be described in detail below with reference to the accompanying drawings and the detailed description.
Fig. 1 is a schematic circuit diagram of a power control circuit in the prior art. The power control circuit PU1 in the prior art is a BUCK control circuit (not shown in the figures are other peripheral circuit elements such as inductors, input/output capacitors, power devices, etc.) of a specific manufacturer's specification.
Generally, a chip (e.g., GPU) meeting a specific manufacturer's specification needs to be powered by three different operating voltages in different operating states. Thus, power control circuit PU1 receives the tristate signal via V _ CTL, inputs VID pin, inputs PU1 via REFIN, generates the required voltage via the resistor network shown in FIG. 1, and outputs R EFADJ The pins output different output voltages.
Specifically, an input voltage inputted from the REFIN terminal is divided by the first branch, the second branch, and the third branch, and an output voltage is outputted through the REFADJ pin via VREF. Wherein the first branch comprises resistors R connected in parallel REF1 And a capacitor C VREF Wherein the resistance R REF1 Is connected with VREF end, and a resistor R REF1 Second terminal of (3) is connected with a resistor R BOOT First terminal of (1), capacitor C VREF Is connected with a resistor R REF1 The second terminal of the capacitor is connected to ground RGND. The second branch comprises a resistor R connected in parallel BOOT And a resistor R REFADJ And a capacitor C REFADJ Wherein the resistance R REFADJ Is connected with the REFADJ terminal, a resistor R REFADJ Second terminal of (3) is connected with a resistor R BOOT First terminal of (3), resistor R BOOT Second terminal of (3) is connected with a resistor R REF2 First terminal of (1), capacitor C REFADJ First end of (2) is connected with R BOOT First terminal of (C), capacitor C REFADJ To ground RGND. The third branch comprises a resistor R connected in parallel REF2 And a capacitor C REFIN Wherein the resistance R REF2 The first terminal of the resistor R is connected with the REFIN terminal REF2 To ground RGND, a capacitor C REFIN First end of (3) is connected with a resistor R REF2 First terminal of (1), capacitor C REFIN To ground RGND.
In one specific example, the values of the elements may be set as follows according to the actual output voltage requirement: c VREF =0.1μF，R REF1 =20KΩ，R REFADJ =20KΩ，C REFADJ =2.7nF，R BOOT =2KΩ，R REF2 =18KΩ。
The conventional technology requires that the power control circuit PU1 must meet NVIDIAOVR specification, the price of the power control circuit is expensive, a common BUCK chip cannot be used, and the design of the circuit is not flexible enough.
Based on at least one of the foregoing technical problems, the present application provides a power control circuit, which includes a control unit, a first voltage dividing unit, a second voltage dividing unit, and a third voltage dividing unit, wherein the control unit is connected to the first voltage dividing unit, the second voltage dividing unit, and the third voltage dividing unit, respectively; the control unit is used for controlling the conduction state of the first voltage division unit, the first voltage division unit or the third voltage division unit according to an input control signal; the first voltage division unit is used for adjusting the output voltage of the power supply control circuit after being conducted so as to enable the output voltage of the power supply control circuit to be a first voltage; the second voltage division unit is used for adjusting the output voltage of the power supply control circuit after being conducted so as to enable the output voltage of the power supply control circuit to be a second voltage; and the third voltage division unit is used for adjusting the output voltage of the power supply control circuit after the power supply control circuit is conducted so as to enable the output voltage of the power supply control circuit to be a third voltage. The embodiment of the application controls the first voltage division unit and the conduction state of the second voltage division unit or the third voltage division unit through the control unit, so that the first voltage is output after the first voltage division unit is conducted, the second voltage division unit is conducted to output the second voltage, the third voltage division unit is conducted to output the third voltage, the chip of an expensive specific model can be realized, only an ordinary voltage reduction circuit (BUCK circuit) chip is used, the size of the output voltage can be adjusted, and the effect of reducing the design cost is realized.
FIG. 2 shows a schematic block diagram of a power control circuit according to an embodiment of the present application; as shown in fig. 2, the power control circuit 200 according to the embodiment of the present application may include a control unit 10, a first voltage division unit 20, a second voltage division unit 30, and a third voltage division unit 40.
Wherein the control unit 10 is connected to the first voltage division unit 20, the second voltage division unit, and 30 the third voltage division unit 40, respectively.
The control unit 10 is configured to control a conduction state of the first voltage dividing unit 20, the second voltage dividing unit 30, or the third voltage dividing unit 40 according to an input control signal;
a first voltage dividing unit 20, configured to adjust an output voltage of the power control circuit 200 after being turned on, so that the output voltage of the power control circuit 200 is a first voltage;
a second voltage dividing unit 30, configured to adjust an output voltage of the power control circuit 200 after being turned on, so that the output voltage of the power control circuit 200 is a second voltage;
the third voltage dividing unit 40 is configured to adjust the output voltage of the power control circuit 200 after being turned on, so that the output voltage of the power control circuit 200 is a third voltage.
In one embodiment of the present application, as shown in fig. 3, the control unit 10 includes a first comparator U1A, a second comparator U2A, and a switching unit; wherein the content of the first and second substances,
the first comparator U1A includes a first INPUT terminal INPUT1_ N, a second INPUT terminal INPUT1_ P, and a first OUTPUT terminal OUTPUT1_1, the first INPUT terminal INPUT1_ N and the second INPUT terminal INPUT1_ P respectively receive a first INPUT voltage and a first reference voltage, and the first OUTPUT terminal OUTPUT1_1 OUTPUTs a first OUTPUT signal according to a comparison result between the first INPUT voltage and the first reference voltage. The first comparator U1A is also respectively connected with a 5V power supply and the ground.
Wherein the first input voltage is generated in accordance with the input control signal V _ CTL.
In one particular example, the first reference voltage may be generated according to a voltage divider circuit. As shown in FIG. 3, the second INPUT terminal INPUT1_ P passes through the resistor PR 5 The 1.8V power supply is connected while the second INPUT terminal INPUT1_ P passes through the resistor PR 6 And (4) grounding. When resistance PR 5 =49.9KΩ，PR 6 When =10K Ω, the first reference voltage received by the second INPUT terminal INPUT1_ P is 0.3V.
The second comparator U2A includes a third INPUT terminal INPUT2_ P, a fourth INPUT terminal INPUT2_ N, and a second OUTPUT terminal OUTPUT2_1, the third INPUT terminal INPUT2_ P and the fourth INPUT terminal INPUT2_ N respectively receive a second INPUT voltage and a second reference voltage, and the second OUTPUT terminal OUTPUT2_1 OUTPUTs a second OUTPUT signal according to a comparison result between the second INPUT voltage and the second reference voltage. The first comparator U2A is also respectively connected with a 5V power supply and the ground.
Wherein the second input voltage is generated according to the input control signal.
In one particular example, the first reference voltage may be generated according to a voltage divider circuit. As shown in FIG. 3, the fourth INPUT terminal INPUT2_ N passes through a resistor PR 7 The 1.8V power supply is connected while the fourth INPUT terminal INPUT2_ N passes through the resistor PR 8 And (4) grounding. When resistance PR 7 =10KΩ，PR 8 =49.9At K Ω, the first reference voltage received by the fourth INPUT terminal INPUT2_ N is 1.3V.
The switch unit 101 receives the first output signal and the second output signal, and the switch module controls and switches the conduction states of the first voltage dividing unit, the second voltage dividing unit and the third voltage dividing unit according to the first output signal and the second output signal.
In one example, in connection with fig. 3, the switching unit 103 comprises a first switching element PQ 1 And a second switching element PQ 2 (ii) a Wherein the first output signal controls the first switching element PQ 1 The second output signal controls the second switching element PQ 1 The switch state of (a).
Wherein the first switching element PQ 1 And the second switching element PQ 2 Each comprising a metal-oxide semiconductor field effect transistor.
In one example, continuing with FIG. 3,
when the first switching element PQ 1 Is turned on and the second switching element PQ 2 When the voltage divider is closed, the first voltage divider outputs the first voltage; or
When the first switching element PQ 1 Is turned off and the second switching element PQ 2 When the voltage divider is closed, the second voltage dividing unit outputs the second voltage; or
When the first switching element PQ 1 Is turned off and the second switching element PQ 2 When the voltage divider is opened, the third voltage divider outputs the third voltage.
With continued reference to FIG. 3, the first voltage divider block includes a first resistor PR 1 A second resistor PR 2 And a third resistance PR 3 Wherein the first resistance PR 1 Is connected to the second resistor PR 2 The first resistor PR 1 Is connected to the output terminal of the power control circuit, and the second resistor PR 2 Is grounded, and the third resistor PR 3 Is connected to the first switching element PQ 1 The third resistor PR 3 Is connected to the first resistor PR 1 A second end of (a);
the second voltage division unit comprises the first resistor PR 1 And the second resistance PR 2 Wherein the first resistance PR 1 Is connected to the second resistor PR 2 The first resistor PR 1 Is connected to the output terminal of the power control circuit, and the second resistor PR 2 The second terminal of (1) is grounded;
the third voltage division unit includes the first resistor PR 1 The second resistor PR 2 And a fourth resistance PR 4 Wherein the first resistance PR 1 Is connected to the second resistor PR 2 The first resistor PR 1 Is connected to the output terminal of the power control circuit, and the second resistor PR 2 Is grounded, and the fourth resistor PR 4 Is connected to the second resistor PR 2 The fourth resistor PR 4 Is connected to the second switching element PQ 2 。
Wherein the first switching element PQ 1 Is connected to the output terminal of the first comparator U1A, and a first switching element PQ 1 Is connected to the FB pin, a first switching element PQ 1 Is connected to the third resistor PR 3 The first end of (a). The second switching element PQ 2 Is connected to the output terminal of the first comparator U2A, and a second switching element PQ 2 Is connected with the fourth resistor PR 4 Second terminal of (d), second switching element PQ 2 Is grounded.
As shown in fig. 3, the resistor PR 2 And also with a capacitor PC 1 And (4) connecting in parallel. The second resistor PR 2 Is also connected to pin 6 FB of the power control circuit. The power supply control circuit further includes a 16 th pin LX _3, a 17 th pin LX _4, an 18 th pin LX _5, a 19 th pin LX _6, a 20 th pin LX _7, a 21 st pin LX _8, an 11 th pin PGND _1, a 12 th pin PGND _2, a 13 th pin PGND _3, a 22 th pin PGND _4, a 23 th pin PGND _5, and the like. Output of the power supply control circuitThe output terminal V _ OUT is connected to each pin through an inductor PL 1. The output end V _ OUT of the power supply control circuit also comprises a PC connected in parallel 2 、PC 3 、PC 4 。
In the power control circuit in the embodiment of the present application, the principle of controlling the output voltage according to the input control signal V _ CTL is as follows:
in a first case, when the first INPUT voltage generated by the INPUT control signal V _ CTL is the lowest voltage (e.g., less than 0.3V), the first INPUT voltage of the first INPUT terminal INPUT1_ N is less than 0.3V, the first reference voltage received by the second INPUT terminal INPUT1_ P is 0.3V, and then the first OUTPUT terminal OUTPUT1_1 OUTPUTs a high level signal; the first INPUT voltage of the third INPUT terminal INPUT2_ P is less than 0.3V, the first reference voltage received by the fourth INPUT terminal INPUT2_ N is 1.5V, and the second OUTPUT terminal OUTPUT2_1 OUTPUTs a low level signal. Accordingly, the first switching element PQ 1 On, the second switching element PQ 2 Are not conducted. At this time, the first resistor PR 1 And a third resistance PR 3 Connected in series and then connected with a second resistor PR 2 Connected in series, e.g. PR 1 =10KΩ，PR 2 =9.31KΩ，PR 3 =133K Ω, and PL 1 =0.22uH，PC 1 =133KΩ，PC 2 =22uF，PC 3 =22uF，PC 4 =330uF, then through the first resistor PR 1 A second resistor PR 2 And a third resistance PR 3 After voltage division, the output voltage of the output end V _ OUT is the lowest voltage 1.2V.
In a second case, when the first INPUT voltage generated by the INPUT control signal V _ CTL is an intermediate voltage (e.g., 0.9V), the first INPUT voltage of the first INPUT terminal INPUT1_ N is 0.9V, the first reference voltage received by the second INPUT terminal INPUT1_ P is 0.3V, and then the first OUTPUT terminal OUTPUT1_1 OUTPUTs a low level signal; the first INPUT voltage of the third INPUT terminal INPUT2_ P is 0.9V, the first reference voltage received by the fourth INPUT terminal INPUT2_ N is 1.5V, and the second OUTPUT terminal OUTPUT2_1 OUTPUTs a low level signal; accordingly, the first switching element PQ 1 And a second switching element PQ 2 Are not conductive. In this case the first resistor PR 1 And a second resistorPR 2 Connected in series, e.g. PR 1 =10KΩ，PR 2 =9.31K Ω, and the values of the other elements are the same, the signal passes through the first resistor PR 1 And a second resistance PR 2 After voltage division, the output voltage of the output end V _ OUT is the intermediate voltage 1.25V.
In a third case, when the first INPUT voltage generated by the INPUT control signal V _ CTL is the highest voltage (e.g., 1.8V), the first INPUT voltage of the first INPUT terminal INPUT1_ N is 1.8V, the first reference voltage received by the second INPUT terminal INPUT1_ P is 0.3V, and then the first OUTPUT terminal OUTPUT1_1 OUTPUTs a low level signal; the first INPUT voltage of the third INPUT terminal INPUT2_ P is 1.8V, the first reference voltage received by the fourth INPUT terminal INPUT2_ N is 1.5V, and the second OUTPUT terminal OUTPUT2_1 OUTPUTs a high level signal; accordingly, the first switching element PQ 1 Non-conductive and second switching element PQ 2 And conducting. At this time, the second resistor PR 2 And a fourth resistor PR 4 Is connected in parallel with the first resistor PR 1 Connected in series, e.g. PR 1 =10KΩ，PR 2 =9.31KΩ，PR 2 =60.4K Ω, and the values of the other elements are the same, the signal passes through the first resistor PR 1 A second resistor PR 2 And a fourth resistor PR 4 After voltage division, the output voltage of the output end V _ OUT is the highest voltage of 1.35V.
In another embodiment of the present application, as shown in fig. 4, the control unit 10 includes a first comparator U1A, a second comparator U2A, and a switching unit; wherein the content of the first and second substances,
the first comparator U1A includes a first INPUT terminal INPUT1_ P, a second INPUT terminal INPUT1_ N, and a first OUTPUT terminal OUTPUT1_1, the first INPUT terminal INPUT1_ P and the second INPUT terminal INPUT1_ N respectively receive a first INPUT voltage and a first reference voltage, and the first OUTPUT terminal INPUT1_ P OUTPUTs a first OUTPUT signal according to a comparison result between the first INPUT voltage and the first reference voltage. The first comparator U1A is also respectively connected with a 5V power supply and the ground.
Wherein the first input voltage is generated according to the input control signal.
In one example, the first reference voltage mayTo be generated according to a voltage divider circuit. As shown in FIG. 4, the second INPUT terminal INPUT1_ N passes through the resistor PR 5 The 1.8V power supply is connected while the second INPUT terminal INPUT1_ N passes through the resistor PR 6 And (4) grounding. When resistance PR 5 =40.2KΩ，PR 6 When =20K Ω, the first reference voltage received by the second INPUT terminal INPUT1_ N is 0.6V.
The second comparator U2A includes a third INPUT terminal INPUT2_ P, a fourth INPUT terminal INPUT2_ N, and a second OUTPUT terminal OUTPUT2_1, the third INPUT terminal INPUT2_ P and the fourth INPUT terminal respectively receive a second INPUT voltage and a second reference voltage, the second OUTPUT terminal OUTPUT1_1 OUTPUTs a second OUTPUT signal according to a comparison result between the second INPUT voltage and the second reference voltage; wherein the second input voltage is generated according to the input control signal. The first comparator U1A is also respectively connected with a 5V power supply and the ground.
The switch unit receives the first output signal and the second output signal, and the switch module controls and switches the conduction states of the first voltage division unit, the second voltage division unit and the third voltage division unit according to the first output signal and the second output signal.
In one example, in connection with fig. 4, the switching unit comprises a first switching element PQ 1 And a second switching element PQ 2 (ii) a Wherein the first output signal controls the first switching element PQ 1 The second output signal controls the second switching element PQ 2 The switch state of (a).
Wherein the first switching element PQ 1 And the second switching element PQ 2 Each comprising a metal-oxide semiconductor field effect transistor.
In one example, with continued reference to FIG. 4, when the first switching element PQ is present 1 Is turned on and the second switching element PQ 2 When the voltage divider is closed, the first voltage divider outputs the first voltage; or
When the first switching element PQ 1 Is turned off and the second switching element PQ 2 When closed, the second voltage division unitOutputting the second voltage; or
When the first switching element PQ 1 Is turned off and the second switching element PQ 2 When the voltage divider is opened, the third voltage divider outputs the third voltage.
With continued reference to FIG. 4, the first voltage divider unit includes a first resistor PR 1 And a second resistance PR 2 Wherein the first resistance PR 1 Is connected to the second resistor PR 2 The first resistor PR 1 Is connected to the output terminal of the power control circuit, and the second resistor PR 2 The second terminal of (1) is grounded;
the second voltage division unit comprises the first resistor PR 1 The second resistor PR 2 And a third resistance PR 3 Wherein the first end PR of the first resistor 1 Connecting the second resistor PR 2 The first resistor PR 1 Is connected to the output terminal of the power control circuit, the second resistor PR 2 Is grounded, and the third resistor PR 3 Is connected to the first resistor PR 1 The third resistor PR 3 Is connected to the first switching element PQ 1 ；
The third voltage division unit includes the first resistor PR 1 The second resistor PR 2 The third resistor PR 3 And a fourth resistor PR 4 Wherein the first resistance PR 1 Is connected to the second resistor PR 2 The first resistor PR 1 Is connected to the output terminal of the power control circuit, the second terminal of the second resistor PR2 is grounded, and the fourth resistor PR 4 Is connected to the second resistor PR 2 The fourth resistor PR 4 Is connected to the second switching element PQ 2 。
Wherein the first switching element PQ 1 Is connected to the output of the first comparator U1A, a first switching element PQ 1 Is connected to the FB pin, a first switching element PQ 1 Drain electrode ofIs connected with a third resistor PR 3 The second end of (a). The second switching element PQ 2 Is connected to the output terminal of the first comparator U2A, and a second switching element PQ 2 Is connected with the fourth resistor PR 4 Second terminal of (a), second switching element PQ 2 Is grounded.
As shown in fig. 4, the resistor PR 2 And also with the capacitor PC 1 Are connected in parallel. The second resistor PR 2 Is also connected to pin 6 FB of the power control circuit. The power supply control circuit further includes a 16 th pin LX _3, a 17 th pin LX _4, an 18 th pin LX _5, a 19 th pin LX _6, a 20 th pin LX _7, a 21 st pin LX _8, an 11 th pin PGND _1, a 12 th pin PGND _2, a 13 th pin PGND _3, a 22 th pin PGND _4, a 23 th pin PGND _5, and the like. The output end V _ OUT of the power supply control circuit passes through an inductor PL 1 Connected with each pin. The output end V _ OUT of the power supply control circuit also comprises a PC connected in parallel 2 、PC 3 、PC 4 。
In the power control circuit in the embodiment of the present application, the principle of controlling the output voltage according to the input control signal V _ CTL is as follows:
in a first case, when the first INPUT voltage generated by the INPUT control signal V _ CTL is the lowest voltage (less than 0.3V), the first INPUT voltage of the first INPUT terminal INPUT1_ P is less than 0.3V, the first reference voltage received by the second INPUT terminal INPUT1_ N is 0.6V, and then the first OUTPUT terminal OUTPUT1_1 OUTPUTs a low level signal; the first INPUT voltage of the third INPUT terminal INPUT2_ P is less than 0.3V, the first reference voltage received by the fourth INPUT terminal INPUT2_ N is 1.5V, and the second OUTPUT terminal OUTPUT2_1 OUTPUTs a low level signal. Accordingly, the first switching element PQ 1 And a second switching element PQ 2 Are not conductive. At this time, the first resistor PR 1 And a second resistance PR 2 Connected in series, e.g. PR 1 =10KΩ，PR 2 =10K Ω, and PL 1 =0.22uH，PC 1 =133KΩ，PC 2 =22uF，PC 3 =22uF，PC 4 =330uF, then through the first resistor PR 1 And a second resistance PR 2 After voltage division, the output voltage of the output end V _ OUT is the lowest voltage of 1.2V.
In a second case, when the first INPUT voltage generated by the INPUT control signal V _ CTL is an intermediate voltage (e.g., 0.9V), the first INPUT voltage of the first INPUT terminal INPUT1_ P is 0.9V, the first reference voltage received by the second INPUT terminal INPUT1_ N is 0.6V, and then the first OUTPUT terminal OUTPUT1_1 OUTPUTs a high level signal; the first INPUT voltage of the third INPUT terminal INPUT2_ P is 0.9V, the first reference voltage received by the fourth INPUT terminal INPUT2_ N is 1.5V, and the second OUTPUT terminal OUTPUT2_1 OUTPUTs a low level signal. Accordingly, the first switching element PQ 1 On, the second switching element PQ 2 And is not conductive. At this time, the second resistor PR 2 And a third resistance PR 3 Connected in parallel and then connected to a first resistor PR 1 Connected in series, e.g. PR 1 =10KΩ，PR 2 =10KΩ，PR 3 =120K Ω, and the values of the other elements are the same, the signal passes through the first resistor PR 1 And a second resistance PR 2 And a third resistance PR 3 After voltage division, the output voltage of the output end V _ OUT is the intermediate voltage 1.25V.
In a third case, when the first INPUT voltage generated by the INPUT control signal V _ CTL is the highest voltage (e.g., 1.8V), the first INPUT voltage of the first INPUT terminal INPUT1_ P is 1.8V, the first reference voltage received by the second INPUT terminal INPUT1_ N is 0.6V, and then the first OUTPUT terminal OUTPUT1_1 OUTPUTs a high level signal; if the first INPUT voltage of the third INPUT terminal INPUT2_ P is 1.8V and the first reference voltage received by the fourth INPUT terminal INPUT2_ N is 1.5V, the second OUTPUT terminal OUTPUT2_1 OUTPUTs a high-level signal; accordingly, the first switching element PQ 1 And a second switching element PQ 2 Are all turned on. At this time, the second resistor PR 2 A third resistor PR 3 A fourth resistor PR 4 Connected in series and then connected with a first resistor PR 1 Connected in parallel, e.g. PR 1 =10KΩ，PR 2 =10KΩ，PR 3 =120KΩ，PR 4 If the value of each element is as above, the signal goes through the first resistor PR1 and the second resistor PR 4K Ω 2 A third resistor PR 3 And a fourth resistor PR 4 After voltage division, the output voltage of the output end V _ OUT is the highest voltage of 1.35V.
When the method is specifically implemented, the resistance values of the resistors can be set according to the requirements of practical application scenes, and different output voltage values can be obtained.
According to the embodiment of the application, the control unit controls the first voltage division unit and the conduction state of the second voltage division unit or the third voltage division unit, the first voltage is output after the first voltage division unit is conducted, the second voltage division unit is conducted to output the second voltage, the third voltage division unit is conducted to output the third voltage, an expensive chip of a specific model can be used, only an ordinary voltage reduction circuit (BUCK circuit) chip is used, the size of the output voltage can be adjusted, and therefore the effect of reducing the design cost is achieved.
The power supply control method of the present application is described below with reference to fig. 5, where fig. 5 shows a schematic flow chart of a power supply control method 500 according to an embodiment of the present application.
S501, a comparison unit receives an input control signal;
s502, the comparison unit generates a first input voltage and a second input voltage according to the input control signal;
s503, the comparing unit generates a first output signal and a second output signal according to the first input voltage and the second input voltage respectively,
s504, the switch unit receives the first output signal and the second output signal, and controls the conducting state of the first voltage division unit, the second voltage division unit or the third voltage division unit according to the first output signal and the second output signal;
when the first voltage division unit is conducted, the power supply control circuit outputs a first voltage; when the second voltage division unit is conducted, the power supply control circuit outputs a second voltage; and when the third voltage division unit is conducted, the power supply control circuit outputs a third voltage.
According to an embodiment of the present application, there is also provided an electronic device including the power supply control circuit described above.
The power supply control method and the electronic equipment can realize the functions of the power supply control circuit, and therefore have the same beneficial effects as the power supply control circuit.
Furthermore, according to the embodiment of the present application, a storage medium is further provided, on which program instructions are stored, and when the program instructions are executed by a computer or a processor, the program instructions are used for executing corresponding steps of the design method of the power device layout of the embodiment of the present application. The storage medium may include, for example, a memory card of a smart phone, a storage component of a tablet computer, a hard disk of a personal computer, a Read Only Memory (ROM), an Erasable Programmable Read Only Memory (EPROM), a portable compact disc read only memory (CD-ROM), a USB memory, or any combination of the above storage media.
The power control method, the electronic device, and the storage medium according to the embodiments of the application can realize the power control circuit, and thus have the same advantages as the power control circuit. And will not be described in detail herein.
Although the example embodiments have been described herein with reference to the accompanying drawings, it is to be understood that the above-described example embodiments are merely illustrative and are not intended to limit the scope of the present application thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the scope or spirit of the present application. All such changes and modifications are intended to be included within the scope of the present application as claimed in the appended claims.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described device embodiments are merely illustrative, and for example, the division of the units is only one logical functional division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another device, or some features may be omitted, or not executed.
In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the application may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in the description of exemplary embodiments of the present application, various features of the present application are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the application and aiding in the understanding of one or more of the various inventive aspects. However, the method of this application should not be construed to reflect the intent: this application is intended to cover such departures from the present disclosure as come within known or customary practice in the art to which this invention pertains. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this application.
It will be understood by those skilled in the art that all of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or elements of any method or apparatus so disclosed, may be combined in any combination, except combinations where such features are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the application and form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.
The various component embodiments of the present application may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. Those skilled in the art will appreciate that a microprocessor or Digital Signal Processor (DSP) may be used in practice to implement some or all of the functionality of some of the modules according to embodiments of the present application. The present application may also be embodied as apparatus programs (e.g., computer programs and computer program products) for performing a portion or all of the methods described herein. Such programs implementing the present application may be stored on a computer readable medium or may be in the form of one or more signals. Such a signal may be downloaded from an internet website or provided on a carrier signal or in any other form.
It should be noted that the above-mentioned embodiments illustrate rather than limit the application, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The application may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means can be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.
The above description is only for the specific embodiments of the present application or the description thereof, and the protection scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope disclosed in the present application, and shall be covered by the protection scope of the present application. The protection scope of the present application shall be subject to the protection scope of the claims.
Claims (11)
1. A power supply control circuit is characterized by comprising a control unit, a first voltage division unit, a second voltage division unit and a third voltage division unit, wherein the control unit is respectively connected with the first voltage division unit, the second voltage division unit and the third voltage division unit;
the control unit is used for controlling the conduction state of the first voltage division unit, the second voltage division unit or the third voltage division unit according to an input control signal;
the first voltage division unit is used for adjusting the output voltage of the power supply control circuit after being conducted so as to enable the output voltage of the power supply control circuit to be a first voltage;
the second voltage division unit is used for adjusting the output voltage of the power supply control circuit after being conducted so as to enable the output voltage of the power supply control circuit to be a second voltage;
and the third voltage division unit is used for adjusting the output voltage of the power supply control circuit after being conducted so as to enable the output voltage of the power supply control circuit to be a third voltage.
2. The power supply control circuit according to claim 1, wherein the control unit includes a first comparator, a second comparator, and a switching unit; wherein the content of the first and second substances,
the first comparator comprises a first input terminal, a second input terminal and a first output terminal, wherein the first input terminal and the second input terminal respectively receive a first input voltage and a first reference voltage, and the first output terminal outputs a first output signal according to a comparison result between the first input voltage and the first reference voltage; wherein the first input voltage is generated according to the input control signal;
the second comparator includes a third input terminal, a fourth input terminal, and a second output terminal, the first input terminal and the second input terminal respectively receive a second input voltage and a second reference voltage, and the second output terminal outputs a second output signal according to a comparison result between the second input voltage and the second reference voltage; wherein the second input voltage is generated according to the input control signal;
the switch unit receives the first output signal and the second output signal, and the switch module controls and switches the conduction states of the first voltage division unit, the second voltage division unit and the third voltage division unit according to the first output signal and the second output signal.
3. The power supply control circuit according to claim 2, wherein the switching unit includes a first switching element and a second switching element; wherein the first output signal controls a switching state of the first switching element, and the second output signal controls a switching state of the second switching element.
4. The power control circuit of claim 3,
when the first switching element is turned on and the second switching element is turned off, the first voltage division unit outputs the first voltage; or
When the first switching element is turned off and the second switching element is turned off, the second voltage division unit outputs the second voltage; or
The third voltage division unit outputs the third voltage when the first switching element is turned off and the second switching element is turned on.
5. The power control circuit of claim 4,
the first voltage division unit comprises a first resistor, a second resistor and a third resistor, wherein the first end of the first resistor is connected with the first end of the second resistor, the second end of the first resistor is connected with the output end of the power control circuit, the second end of the second resistor is grounded, the first end of the third resistor is connected with the first switching element, and the second end of the third resistor is connected with the second end of the first resistor;
the second voltage division unit comprises the first resistor and the second resistor, wherein the first end of the first resistor is connected with the first end of the second resistor, the second end of the first resistor is connected with the output end of the power supply control circuit, and the second end of the second resistor is grounded;
the third voltage division unit comprises the first resistor, the second resistor and a fourth resistor, wherein the first end of the first resistor is connected with the first end of the second resistor, the second end of the first resistor is connected with the output end of the power supply control circuit, the second end of the second resistor is grounded, the first end of the fourth resistor is connected with the first end of the second resistor, and the second end of the fourth resistor is connected with the second switch element.
6. The power control circuit of claim 3,
when the first switching element is turned on and the second switching element is turned off, the first voltage division unit outputs the first voltage; or
When the first switching element is turned off and the second switching element is turned off, the second voltage division unit outputs the second voltage; or
The third voltage division unit outputs the third voltage when the first switching element is turned off and the second switching element is turned on.
7. The power control circuit of claim 6,
the first voltage division unit comprises a first resistor and a second resistor, wherein the first end of the first resistor is connected with the first end of the second resistor, the second end of the first resistor is connected with the output end of the power supply control circuit, and the second end of the second resistor is grounded;
the second voltage division unit comprises the first resistor, the second resistor and a third resistor, wherein a first end of the first resistor is connected with a first end of the second resistor, a second end of the first resistor is connected with an output end of the power supply control circuit, a second end of the second resistor is grounded, a first end of the third resistor is connected with a first end of the first resistor, and a second end of the third resistor is connected with the first switching element;
the third voltage division unit comprises the first resistor, the second resistor, the third resistor and a fourth resistor, wherein the first end of the first resistor is connected with the first end of the second resistor, the second end of the first resistor is connected with the output end of the power control circuit, the second end of the second resistor is grounded, the first end of the fourth resistor is connected with the first end of the second resistor, and the second end of the fourth resistor is connected with the second switch element.
8. The power control circuit of claim 3,
the first switching element and the second switching element each include a metal-oxide semiconductor field effect transistor.
9. A power supply control method applied to the power supply control circuit of claim 1 to claim 8, the power supply control method comprising:
the comparison unit receives an input control signal;
the comparison unit generates a first input voltage and a second input voltage according to the input control signal;
the comparison unit generates a first output signal and a second output signal according to the first input voltage and the second input voltage respectively;
the switch unit receives the first output signal and the second output signal and controls the conduction state of the first voltage division unit, the second voltage division unit or the third voltage division unit according to the first output signal and the second output signal;
when the first voltage division unit is conducted, the power supply control circuit outputs a first voltage; when the second voltage division unit is conducted, the power supply control circuit outputs a second voltage; when the third voltage division unit is conducted, the power supply control circuit outputs a third voltage.
10. An electronic device characterized in that it comprises a power control circuit according to any one of claims 1 to 8.
11. A storage medium having stored thereon a computer program which, when executed by a processor, causes the processor to execute the power supply control method according to claim 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310076444.2A CN115940626B (en) | 2023-02-08 | 2023-02-08 | Power supply control circuit, power supply control method, electronic equipment and storage medium |
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| CN202310076444.2A CN115940626B (en) | 2023-02-08 | 2023-02-08 | Power supply control circuit, power supply control method, electronic equipment and storage medium |
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| CN115940626B (en) | 2023-05-23 |
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