WO2018161422A1 - Circuit et procédé d'alimentation électrique - Google Patents

Circuit et procédé d'alimentation électrique Download PDF

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Publication number
WO2018161422A1
WO2018161422A1 PCT/CN2017/082518 CN2017082518W WO2018161422A1 WO 2018161422 A1 WO2018161422 A1 WO 2018161422A1 CN 2017082518 W CN2017082518 W CN 2017082518W WO 2018161422 A1 WO2018161422 A1 WO 2018161422A1
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WO
WIPO (PCT)
Prior art keywords
circuit
voltage
control switch
output
working
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Application number
PCT/CN2017/082518
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English (en)
Chinese (zh)
Inventor
张洵
况火根
晁康洁
罗红磊
Original Assignee
华为技术有限公司
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201780028145.4A priority Critical patent/CN109074145B/zh
Publication of WO2018161422A1 publication Critical patent/WO2018161422A1/fr

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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

Definitions

  • the embodiments of the present application relate to the field of electronic technologies, and in particular, to a power supply circuit and a power supply method.
  • the most power-consuming part is often the power amplifier Power Amplifier, PA.
  • PA Power Amplifier
  • Class H power amplifiers provide tens or even hundreds of voltage gears through a combination of BUCK circuit and charge pump (CP), which is more efficient.
  • CP charge pump
  • Class H amplifiers require separate BUCK circuits for each CP, as well as corresponding off-chip inductors and capacitors, this not only increases the design complexity inside the chip, but also increases the cost of chip design and package testing. The increase of off-chip components is not only costly, but also occupies a large number of Printed Circuit Board (PCB) layout areas, which is not conducive to the thinning of mobile phones.
  • PCB Printed Circuit Board
  • the embodiment of the invention provides a power supply circuit and a power supply method.
  • PMU Power Management Unit
  • a power supply circuit which circuit can include: a switching circuit, a control circuit, and an output circuit.
  • the switching circuit is configured to connect at least one first voltage outputted by the at least one step-down DC conversion circuit, and each step-down DC conversion circuit is configured to supply power to the at least one working circuit.
  • the control circuit is configured to turn on the corresponding step-down DC conversion circuit according to the voltage required by the working circuit and the at least one first voltage.
  • the output circuit is configured to output a second voltage according to the first voltage outputted by the step-down DC conversion circuit that is turned on to supply power to the working circuit, wherein the voltage value of the first voltage is greater than or equal to the voltage value of the second voltage.
  • the circuit effectively achieves high efficiency, saves cost, and reduces peripheral components required for the BUCK circuit, thereby reducing chip area and eliminating potential performance interference risks. Conducive to the thin and light design of the mobile phone.
  • control circuit is further configured to turn on the corresponding step-down type according to the voltage required by the working circuit, the at least one first voltage, and the operating state of the corresponding step-down DC conversion circuit that outputs the at least one first voltage. DC conversion circuit.
  • the switch circuit includes at least one first control switch and at least one second control switch, the first control switch and the second control switch are equal in number and one-to-one correspondence, and at least one first control switch is used At least one first voltage that is coupled to the output of the at least one circuit.
  • the control circuit is specifically configured to use when the first voltage is greater than or equal to When the voltage required by the circuit is made, the signal is triggered to the output of the corresponding second control switch.
  • the second control switch is configured to trigger the corresponding first control switch to turn on the step-down DC converter circuit that outputs the first voltage according to the trigger signal.
  • control circuit is further configured to: when the first voltage is greater than or equal to the voltage required by the working circuit, and the step-down DC conversion circuit that outputs the first voltage is not fully loaded, to the corresponding second control switch
  • the trigger signal is output.
  • the second control switch is configured to trigger the corresponding first control switch to turn on the step-down DC converter circuit that outputs the first voltage according to the trigger signal.
  • the first end of each of the at least one first control switch is an input of the power supply circuit, and the second end of each of the at least one first control switch The terminal is connected to the first input end of the output circuit, and the output end of the output circuit is an output end of the power supply circuit; the third end of each of the at least one first control switch and the at least one second control switch a first end of each second control switch is connected, and a second end of each of the at least one second control switch is connected to a first output of the at least one first output of the control circuit, at least A third end of each of the second control switches is grounded, and the three second outputs of the control circuit are respectively coupled to the three second inputs of the output circuit.
  • the first control switch is a PMOS or NMOS, or a combination of NMOS and PMOS.
  • a power supply method may include: accessing at least one first voltage output by at least one step-down DC conversion circuit, and each step-down DC conversion circuit is configured to supply power to at least one working circuit .
  • the corresponding step-down DC conversion circuit is turned on according to the voltage required by the working circuit and the at least one first voltage.
  • the method effectively achieves high efficiency, saves cost, and reduces peripheral components required for the BUCK circuit, thereby reducing chip area and eliminating potential performance interference risks. Conducive to the thin and light design of the mobile phone.
  • the corresponding step-down DC conversion circuit is turned on according to the voltage required by the working circuit and the at least one first voltage, including: at least one first voltage and at least one output according to the required voltage of the working circuit
  • the working state of the corresponding step-down DC conversion circuit of a voltage turns on the corresponding step-down DC conversion circuit.
  • the corresponding BUCK circuit is turned on according to the voltage required by the working circuit and the at least one first voltage, including: when the first voltage is greater than or equal to the voltage required by the working circuit, to the corresponding second control switch
  • the trigger signal is output.
  • the corresponding first control switch is triggered to turn on the step-down DC converter circuit that outputs the first voltage.
  • the buck DC conversion circuit that outputs the first voltage when the first voltage is greater than or equal to a voltage required by the working circuit, and the buck DC conversion circuit that outputs the first voltage is not fully loaded, to the corresponding second control switch
  • the trigger signal is output.
  • the corresponding first control switch is triggered to turn on the step-down DC converter circuit that outputs the first voltage.
  • 1 is a schematic structural view of a conventional class G power amplifier
  • FIG. 2 is a schematic structural view of a conventional class H power amplifier
  • FIG. 3 is a schematic structural diagram of a circuit system according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of a power supply circuit according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of an output circuit according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic structural diagram of another power supply circuit according to an embodiment of the present disclosure.
  • FIG. 7 is a schematic structural diagram of still another power supply circuit according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic structural diagram of still another power supply circuit according to an embodiment of the present disclosure.
  • FIG. 9 is a schematic structural diagram of still another power supply circuit according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic structural diagram of still another power supply circuit according to an embodiment of the present disclosure.
  • FIG. 11 is a schematic structural diagram of still another power supply circuit according to an embodiment of the present invention.
  • FIG. 12 is a schematic structural diagram of still another power supply circuit according to an embodiment of the present disclosure.
  • FIG. 13 is a schematic flowchart diagram of a power supply method according to an embodiment of the present invention.
  • the power supply circuit provided by the present application can be applied to an audio device that needs to be used for audio playback of a terminal device (such as a mobile phone, a tablet computer, etc.), a hearing aid, a virtual reality device, and the like.
  • a terminal device such as a mobile phone, a tablet computer, etc.
  • the audio device can include a power management unit 310, a power supply circuit 320 (such as a charge pump circuit), and at least one operational circuit 330 (such as a power amplifier).
  • the power management unit 310 includes at least one BUCK (including BUCK1, BUCK2 to BUCKn) for outputting a power supply voltage, wherein each BUCK circuit can power at least two of the working circuits 330.
  • the power supply circuit 320 is configured to receive the power supply voltage output by the at least one BUCK circuit in the power management unit 310, and select a corresponding BUCK circuit in the power management unit 310 according to an operating mode of the working circuit 330 (such as a music mode, a video mode, etc.).
  • the working circuit 330 provides an operating voltage. That is, the working circuit can multiplex the BUCK circuit in the power management unit 310 through the power supply circuit 320.
  • the application multiplexes the BUCK circuit of the power management unit according to the working mode of the working circuit by the power supply circuit, effectively achieves high efficiency, saves cost, reduces peripheral components required by the BUCK circuit, and thereby reduces chip area.
  • the BUCK circuit that the power supply circuit 320 selects to provide the working voltage to the working circuit 330 may not be the BUCK circuit in the power management unit 310, and the BUCK circuit in other units or modules is also applicable, and the embodiment of the present invention does not do this. limit.
  • FIG. 4 is a schematic structural diagram of a power supply circuit according to an embodiment of the present invention.
  • the power supply circuit may include a switch circuit 410, a control circuit 420, and an output circuit 430.
  • the switch circuit 410 may include at least one first control switch K and at least one second control switch S, the first control switch K and the second control switch S being equal in number and one-to-one correspondence.
  • the first end of each of the at least one first control switch K is an input end of the power supply circuit, and the second end of each of the at least one first control switch K is connected to the output circuit
  • the first input end of the 430 is connected, and the output end of the output circuit 430 is an output end of the power supply circuit;
  • the third end of each of the at least one first control switch K and the at least one second control switch S The first end of each of the second control switches S is connected, and the second end of each of the at least one second control switch S and the first end of the at least one first output of the control circuit 420 are first The outputs are connected, and the third end of each of the at least one second control switch S is grounded.
  • the three second outputs of control circuit 420 are coupled to three second inputs of output circuit 440, respectively.
  • At least one first control switch K of the switch circuit 410 is configured to access at least one first voltage output by the at least one BUCK circuit. Wherein, each BUCK circuit can supply power to at least one working circuit.
  • the voltage values of the first voltage output by the at least one BUCK circuit may all be the same, partially the same, or completely different.
  • the voltage values of the first voltages output by the four BUCK circuits may be uniform voltage distributions of 1.2V, 1.4V, 1.6V, and 1.8V.
  • the control circuit 420 is configured to turn on the corresponding BUCK circuit according to the voltage required by the working circuit and the at least one first voltage.
  • the control circuit 420 compares the voltage required by the working circuit with the at least one first voltage, respectively. When the first voltage is greater than or equal to the voltage required by the working circuit, the control circuit 420 passes the first output terminal to the corresponding second control switch S. The trigger signal is output. The second control switch S triggers the corresponding first control switch K to turn on the BUCK circuit that outputs the first voltage according to the trigger signal.
  • control circuit 420 may further activate the corresponding BUCK according to the required voltage of the working circuit, the at least one first voltage, and the working state of the corresponding BUCK circuit that outputs the at least one first voltage (such as a full load state or an unloaded state). Circuit.
  • the control circuit 420 compares the voltage required by the working circuit with the at least one first voltage. When the first voltage is greater than or equal to the voltage required by the working circuit, and the BUCK circuit that outputs the first voltage is not fully loaded, the control circuit 420 passes The first output terminal outputs a trigger signal to the corresponding second control switch S. The second control switch S triggers the corresponding first control switch K to turn on the step-down DC converter circuit that outputs the first voltage according to the trigger signal.
  • the control circuit 420 may select the first voltage according to design requirements. , thereby turning on the BUCK circuit corresponding to the first voltage.
  • the control circuit 420 may preferentially select the first voltage corresponding to the idle BUCK circuit, the first voltage closest to the voltage required by the working circuit, or the multiplexing according to design requirements (such as increasing the usage rate of the BUCK circuit, reducing the cost, etc.).
  • control circuit 420 stores information about at least one BUCK circuit at time t, and the related information can be as shown in Table 1.
  • the first voltage output of the BUCK1 circuit is 1.2V, which is in an idle state; the first voltage outputted by the BUCK2 circuit is 1.4V, which is in an unloaded state; the first voltage outputted by the BUCK3 circuit is 1.7V, which is at full load. State; the first voltage output of the BUCK4 circuit is 1.9V, which is in an unloaded state.
  • the control circuit When the required voltage of the PA is 1.2V, the control circuit is controlled because the BUCK3 circuit corresponding to 1.7V is in a full load state.
  • the path 420 can select any one of a BUCK1 circuit, a BUCK2 circuit, and a BUCK4 circuit corresponding to 1.2V, 1.4V, and 1.9V. Therefore, the control circuit 420 sends a trigger signal to the second control switch S where the BUCK1 circuit, the BUCK2 circuit or the BUCK4 circuit is located to turn on the BUCK1 circuit, the BUCK2 circuit or the BUCK4 circuit.
  • the control circuit 420 When the required voltage of the PA is 1.5V, the control circuit 420 will select a suitable first voltage from 1.7V and 1.9V. Since the BUCK3 circuit corresponding to 1.7V is in the full load state, the control circuit 420 is in the second position of the BUCK4 circuit.
  • the control switch S sends a trigger signal to turn on the BUCK
  • control circuit 420 selects an appropriate BUCK to supply power to the working circuit by selecting at least one first voltage output by the at least one BUCK circuit.
  • the power method including the power supply circuit is almost equivalent to the conventional class H power method.
  • the additional inductance and capacitance required by the Class H power method are not required, which saves cost and reduces peripheral components.
  • the output circuit 430 is configured to output a second voltage according to the first voltage output by the turned-on BUCK circuit to supply power to the working circuit. Wherein, the voltage value of the first voltage is greater than or equal to the voltage value of the second voltage.
  • the output circuit 430 may include a control switch k1, a control switch k2, a control switch k3, a capacitor C1, and a capacitor C2, as shown in FIG.
  • the first end of the capacitor C1 is the first input end of the output circuit 430
  • the first end of the control switch k1 is connected to the first end of the capacitor C1
  • the second end of the capacitor C1 is connected to the second end of the control switch k2, and the switch is controlled
  • the first end of k2 is connected to the first end of the capacitor C2
  • the third end of the control switch k2 is the first second input end of the output circuit 430
  • the first end of the control switch k3 is connected to the second end of the capacitor C1
  • the first control switch K may be a PMOS (as shown in FIG. 6), an NMOS (as shown in FIG. 7), or a combination of NMOS and PMOS (as shown in FIG. 8).
  • the second control switch S may be a three-terminal controllable switch, or may be a PMOS, an NMOS or a combination of NMOS and PMOS.
  • the method for selecting the switch type of the first control switch may depend on a difference between a first voltage provided by the at least one BUCK circuit and a voltage required by the working circuit, and if the difference is greater than a threshold voltage of the PMOS, selecting a PMOS; If the difference is smaller than the threshold voltage of the PMOS, the NMOS is selected, and the selection method can effectively reduce the chip area.
  • the method for selecting the type of the switch of the first control switch is not limited to the above method, and may be selected by other means, such as the method of actual design calculation, which is not described herein again.
  • the power supply circuit may further include an error method EA, as shown in FIG.
  • the first input of the EA inputs the voltage required by the working circuit
  • the second input of the EA inputs the first voltage output by the open BUCK circuit
  • the output of the EA and each of the at least one second control switch S The third end of S is connected to output a difference between a voltage required by the working circuit and the first voltage.
  • the EA is used to provide closed-loop control of the BUCK by using the EA to control the output of the power supply circuit to the voltage value required by the operating circuit.
  • the error amplifier amplifies the error signal to achieve the PSRR (supply voltage rejection ratio) of the power supply provided by the BUCK to improve the sensitivity of the control system and improve the adjustment accuracy (reducing the adjustment error). Due to the complicated power supply environment of the BUCK circuit, noise sources visible in the audio band may be generated. Therefore, by increasing the EA, the PSRR of 40 dB or more can be provided, so that the output of the working circuit (such as PA) is not easily interfered.
  • the number of EAs may be at least one, and one EA may be connected to at least one second control switch S.
  • the EA can also control any one of the control switch k1, the control switch k2, and the control switch k3, as shown in FIGS. 10-12.
  • the power supply circuit provided by the present application effectively multiplexes the BUCK circuit in the power management unit, effectively achieves high efficiency, saves cost, and reduces peripheral components required for the BUCK circuit, thereby reducing chip area. Eliminate the potential performance interference risk, which is conducive to the thin and light design of the mobile phone.
  • An embodiment of the present invention corresponding to the above power supply circuit further provides a power supply method. As shown in FIG. 13, the method may include:
  • Step 1310 Connect at least one first voltage output by the at least one step-down DC conversion circuit, and each step-down DC conversion circuit is configured to supply power to the at least one working circuit.
  • Step 1320 Turn on a corresponding step-down DC conversion circuit according to a voltage required by the working circuit and at least one first voltage.
  • Step 1330 Output a second voltage according to the first voltage outputted by the step-down DC conversion circuit that is turned on to supply power to the working circuit.
  • the voltage value of the first voltage is greater than or equal to the voltage value of the second voltage.
  • the corresponding BUCK circuit is turned on according to the voltage required by the working circuit and the at least one first voltage, including:
  • the corresponding step-down DC conversion circuit is turned on according to the voltage required by the working circuit, the at least one first voltage, and the operating state of the corresponding step-down DC conversion circuit that outputs at least one first voltage.
  • the corresponding BUCK circuit is turned on according to the voltage required by the working circuit and the at least one first voltage, including:
  • the output trigger signal to the corresponding second control switch is triggered according to the trigger signal.
  • the corresponding first control switch turns on the step-down DC converter circuit that outputs the first voltage.
  • the method realizes the BUCK circuit dedicated to removing the class H power amplifier, reduces the chip area, saves the cost, and eliminates the potential interference sources.
  • Non-transitory medium such as random access memory, read only memory, flash memory, hard disk, solid state disk, magnetic tape, floppy disk, optical disc, and any combination thereof.

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Dc-Dc Converters (AREA)

Abstract

L'invention concerne un circuit d'alimentation électrique. Le circuit comprend : un circuit de commutation (410) pour recevoir au moins une première tension délivrée par au moins un circuit convertisseur abaisseur de courant continu (CC), chaque circuit convertisseur abaisseur de CC étant destiné à alimenter en courant au moins un circuit de travail; un circuit de commande (420) pour activer le circuit convertisseur abaisseur de CC correspondant en fonction d'une tension requise du circuit de travail et de ladite au moins une première tension; et un circuit de sortie (430), pour délivrer en sortie une seconde tension en fonction de la première tension délivrée par le circuit convertisseur abaisseur de CC activé de façon à alimenter en courant le circuit de travail, une valeur de la première tension étant égale ou supérieure à une valeur de la seconde tension. Le circuit permet d'obtenir efficacement un rendement élevé et une réduction des composants périphériques par multiplexage du circuit convertisseur abaisseur de CC dans une unité de gestion de courant électrique, ce qui permet d'économiser les coûts.
PCT/CN2017/082518 2017-03-10 2017-04-28 Circuit et procédé d'alimentation électrique WO2018161422A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201780028145.4A CN109074145B (zh) 2017-03-10 2017-04-28 供电电路及供电方法

Applications Claiming Priority (2)

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CN201710142501.7 2017-03-10
CN201710142501 2017-03-10

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WO2018161422A1 true WO2018161422A1 (fr) 2018-09-13

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WO2020052161A1 (fr) * 2018-09-14 2020-03-19 珠海格力电器股份有限公司 Puce de commande
CN111030619A (zh) * 2019-12-19 2020-04-17 上海傅硅电子科技有限公司 音频功率放大器及控制其输出电压的方法
WO2020215293A1 (fr) * 2019-04-25 2020-10-29 华为技术有限公司 Circuit d'alimentation électrique et procédé de commande d'alimentation électrique
EP3905477A4 (fr) * 2019-02-23 2022-03-16 Huawei Technologies Co., Ltd. Circuit de décharge et dispositif électronique

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WO2020052161A1 (fr) * 2018-09-14 2020-03-19 珠海格力电器股份有限公司 Puce de commande
EP3905477A4 (fr) * 2019-02-23 2022-03-16 Huawei Technologies Co., Ltd. Circuit de décharge et dispositif électronique
WO2020215293A1 (fr) * 2019-04-25 2020-10-29 华为技术有限公司 Circuit d'alimentation électrique et procédé de commande d'alimentation électrique
US20220045611A1 (en) 2019-04-25 2022-02-10 Huawei Technologies Co., Ltd. Power Supply Circuit and Power Supply Control Method
US11757362B2 (en) 2019-04-25 2023-09-12 Huawei Technologies Co., Ltd. Power supply circuit and power supply control method
CN111030619A (zh) * 2019-12-19 2020-04-17 上海傅硅电子科技有限公司 音频功率放大器及控制其输出电压的方法

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