CN106300969A - A kind of power control realizing compound output and method - Google Patents
A kind of power control realizing compound output and method Download PDFInfo
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- CN106300969A CN106300969A CN201510298899.4A CN201510298899A CN106300969A CN 106300969 A CN106300969 A CN 106300969A CN 201510298899 A CN201510298899 A CN 201510298899A CN 106300969 A CN106300969 A CN 106300969A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
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Abstract
The invention discloses a kind of power control realizing compound output and method, wherein, described device includes: detector unit, control unit；Wherein, detector unit, it is used for detecting pattern switching demand, testing result is transferred to control unit；Control unit, for when described testing result is for being switched to the second pattern by first mode, detecting the second magnitude of voltage after the first signal is switched, described second magnitude of voltage is the target voltage values corresponding to described second pattern；And, when described testing result is for being switched to first mode by the second pattern, detect the first magnitude of voltage after secondary signal is switched, described first magnitude of voltage is the target voltage values corresponding to described first mode.
Description
Technical Field
The invention relates to a control technology, in particular to a power supply control device and a power supply control method for realizing composite output.
Background
In the process of implementing the technical solution of the embodiment of the present application, the inventor of the present application finds at least the following technical problems in the related art:
with the development of mobile communication, especially the development of LTE technology, high-speed wireless communication brings higher power consumption, the power consumption requirement of a mobile terminal is more and more strict, an updated technology needs to be adopted to reduce the power consumption, especially in the initial development stage of LTE, the previous network system needs to be compatible, and the design of a power supply is also more complicated. A power supply design scheme which is more power-saving and more compatible is required for terminal products.
However, the current terminal power supply module is not improved much, and still adopts the conventional design, such as the design of the conventional BUCK power supply. For the LTE PA, in order to save more power, an APT technology is developed, and an APT power supply is designed, but since an APT power supply unit needs to be added separately, the cost and the area of the terminal are adversely affected. The BUCK power supply and the APT power supply are different in applicable application scenes, different power supply designs are adopted for different application scenes respectively, and the BUCK power supply and the APT power supply are not flexible enough.
At present, the problems to be solved are: in order to further improve user experience, the problems that the efficiency of a traditional power supply is not high and the compatibility of a new APT power supply is not good need to be solved, however, the characteristics and the commonality of the traditional power supply and the new APT power supply are not integrated in the prior art, and the power supply design schemes of the traditional power supply and the new APT power supply can be compatible.
Disclosure of Invention
In view of this, embodiments of the present invention are to provide a power control apparatus and method for implementing composite output, which at least solve the problems in the prior art, and implement a power design scheme that combines the features and commonalities of the two and is compatible with the two.
The technical scheme of the embodiment of the invention is realized as follows:
the embodiment of the invention provides a power supply control device for realizing composite output, which comprises: a detection unit and a control unit; wherein,
the detection unit is used for detecting the mode switching requirement and transmitting the detection result to the control unit;
the control unit is used for detecting a first signal to obtain a switched second voltage value when the detection result is that the first mode is switched to a second mode, and the second voltage value is a target voltage value corresponding to the second mode;
and when the detection result is that the second mode is switched to the first mode, detecting a second signal to obtain a switched first voltage value, wherein the first voltage value is a target voltage value corresponding to the first mode.
In the foregoing solution, the detecting unit is further configured to detect a mode switching requirement according to a switching signal.
In the above scheme, the apparatus further comprises: the change-over switch is used for switching to be connected with a second Pulse Width Modulation (PWM) signal source when the first mode is switched to the second mode under the control of the switching signal; the output frequency of the second PWM signal source is variable frequency;
and under the control of the switching signal, when the second mode is switched to the first mode, the second mode is switched to be connected with the first PWM signal source; the output frequency of the first PWM signal source is a fixed frequency.
In the above scheme, the switch is located at the control end of the switch tube.
In the above scheme, the apparatus further comprises: the input end power supply comprises a switching tube, an inductor, a load, an energy storage capacitor and a freewheeling diode;
the input end power supply is connected with the switch tube, the input end power supply is connected with the fly-wheel diode, the switch tube is connected with a first connecting point, the first connecting point is connected with the inductor, the first connecting point is also connected with the fly-wheel diode, the fly-wheel diode is connected with the energy storage capacitor and the load, and the load is grounded;
the inductor is connected with a second connection point, the second connection point is connected with the energy storage capacitor, and the second connection point is also connected with the load;
the change-over switch is respectively connected with the first PWM signal source or the second PWM signal source when the mode is switched, and the second PWM signal source is connected with the control unit;
the control unit is connected to an external load external to the power supply.
The embodiment of the invention also provides a power supply control method for realizing composite output, which comprises the following steps:
detecting a mode switching requirement to obtain a detection result;
when the detection result is that the first mode is switched to the second mode, detecting a first signal to obtain a switched second voltage value, wherein the second voltage value is a target voltage value corresponding to the second mode;
and when the detection result is that the second mode is switched to the first mode, detecting a second signal to obtain a switched first voltage value, wherein the first voltage value is a target voltage value corresponding to the first mode.
In the foregoing solution, the detecting a mode switching requirement includes: and detecting the mode switching requirement according to the switching signal.
In the foregoing solution, when the detection result is that the first mode is switched to the second mode, the detecting the first signal to obtain a switched second voltage value, where the second voltage value is a target voltage value corresponding to the second mode, includes:
under the control of the switching signal, when the first mode is switched to the second mode, the switching switch is switched to be connected with a second Pulse Width Modulation (PWM) signal source;
the output frequency of the second PWM signal source is variable frequency.
In the foregoing solution, when the detection result is that the second mode is switched to the first mode, the detecting the second signal to obtain a switched first voltage value, where the first voltage value is a target voltage value corresponding to the first mode, includes:
under the control of the switching signal, when the second mode is switched to the first mode, the change-over switch is switched to be connected with the first PWM signal source; the output frequency of the first PWM signal source is a fixed frequency.
In the above scheme, the method further comprises:
the input end power supply supplies power to the load through the switching tube and the inductor and charges the inductor at the same time;
when the switch tube is conducted, the inductor current is increased, the inductor stores energy, and the energy stored in the inductor is accumulated to supply power to the load through a loop formed by the freewheeling diode;
when the switch tube is closed, the inductor current is reduced, and the inductor releases the stored energy.
The power control device for realizing composite output of the embodiment of the invention comprises: a detection unit and a control unit; the detection unit is used for detecting the mode switching requirement and transmitting the detection result to the control unit; the control unit is used for detecting a first signal to obtain a switched second voltage value when the detection result is that the first mode is switched to a second mode, and the second voltage value is a target voltage value corresponding to the second mode; and when the detection result is that the second mode is switched to the first mode, detecting a second signal to obtain a switched first voltage value, wherein the first voltage value is a target voltage value corresponding to the first mode.
By adopting the embodiment of the invention, when the mode switching requirement exists, the target voltage value corresponding to the mode switching is obtained through the mode switching requirement and the signal detection, and the switched target voltage value is obtained, so that the switching among a plurality of modes can be realized in one control device, for example, the switching between the BUCK function mode and the APT function mode is realized, and the compatible power supply design scheme integrating the characteristics and the commonality of the plurality of modes is realized.
Drawings
FIG. 1 is a schematic diagram of a conventional BUCK power supply;
FIG. 2 is a schematic diagram of a prior art APT power supply;
fig. 3 is a structural diagram of the composite output power supply of the present invention.
Detailed Description
The following describes the embodiments in further detail with reference to the accompanying drawings.
The embodiment of the invention provides a power supply control device for realizing composite output, which comprises: a detection unit and a control unit; the detection unit is used for detecting the mode switching requirement and transmitting the detection result to the control unit.
The control unit is used for detecting a first signal to obtain a switched second voltage value when the detection result is that the first mode is switched to a second mode, and the second voltage value is a target voltage value corresponding to the second mode; and when the detection result is that the second mode is switched to the first mode, detecting a second signal to obtain a switched first voltage value, wherein the first voltage value is a target voltage value corresponding to the first mode.
In an implementation manner of the embodiment of the present invention, the detecting unit is further configured to detect a mode switching requirement according to a switching signal.
In an implementation manner of an embodiment of the present invention, the apparatus further includes: the change-over switch is used for switching to be connected with a second Pulse Width Modulation (PWM) signal source when the first mode is switched to the second mode under the control of the switching signal; the output frequency of the second PWM signal source is variable frequency; and under the control of the switching signal, when the second mode is switched to the first mode, the second mode is switched to be connected with the first PWM signal source; the output frequency of the first PWM signal source is a fixed frequency.
In an embodiment of the invention, the switch is located at a control end of the switch tube.
In an implementation manner of an embodiment of the present invention, the apparatus further includes: the input end power supply comprises a switching tube, an inductor, a load, an energy storage capacitor and a freewheeling diode; the input end power supply is connected with the switch tube, the input end power supply is connected with the fly-wheel diode, the switch tube is connected with a first connecting point, the first connecting point is connected with the inductor, the first connecting point is also connected with the fly-wheel diode, the fly-wheel diode is connected with the energy storage capacitor and the load, and the load is grounded; the inductor is connected with a second connection point, the second connection point is connected with the energy storage capacitor, and the second connection point is also connected with the load; the change-over switch is respectively connected with the first PWM signal source or the second PWM signal source when the mode is switched, and the second PWM signal source is connected with the control unit; the control unit is connected to an external load external to the power supply.
The embodiment of the invention provides a power supply control method for realizing composite output, which comprises the following steps:
step 101, detecting a mode switching requirement to obtain a detection result;
step 102, when the detection result is that the first mode is switched to the second mode, detecting the first signal to obtain a switched second voltage value, wherein the second voltage value is a target voltage value corresponding to the second mode;
step 103, when the detection result is that the second mode is switched to the first mode, detecting a second signal to obtain a switched first voltage value, where the first voltage value is a target voltage value corresponding to the first mode.
Here, step 102 and step 103 may be executed either one or both of them, and the order may be interchanged.
In an embodiment of the present invention, the detecting a mode switching requirement includes: and detecting the mode switching requirement according to the switching signal.
In an embodiment of the present invention, when the detection result is that the first mode is switched to the second mode, the detecting the first signal to obtain a switched second voltage value, where the second voltage value is a target voltage value corresponding to the second mode, includes:
under the control of the switching signal, when the first mode is switched to the second mode, the switching switch is switched to be connected with a second Pulse Width Modulation (PWM) signal source;
the output frequency of the second PWM signal source is variable frequency.
In an embodiment of the present invention, when the detection result is that the second mode is switched to the first mode, the detecting a second signal to obtain a switched first voltage value, where the first voltage value is a target voltage value corresponding to the first mode, includes:
under the control of the switching signal, when the second mode is switched to the first mode, the change-over switch is switched to be connected with the first PWM signal source; the output frequency of the first PWM signal source is a fixed frequency.
In an implementation manner of an embodiment of the present invention, the method further includes:
the input end power supply supplies power to the load through the switching tube and the inductor and charges the inductor at the same time;
when the switch tube is conducted, the inductor current is increased, the inductor stores energy, and the energy stored in the inductor is accumulated to supply power to the load through a loop formed by the freewheeling diode;
when the switch tube is closed, the inductor current is reduced, and the inductor releases the stored energy.
The embodiment of the invention is explained by taking a practical application scene as an example as follows:
fig. 1 is a schematic diagram of a conventional general BUCK power supply, and fig. 1 discloses that the working principle of the conventional BUCK power supply is as follows: the input end power supply Vg supplies power to the load R through the switch tube S and the inductor L and charges the inductor L at the same time. Here, the inductance itself functions as a constant current source, and therefore, functions to store energy and transfer energy. And the energy storage capacitor C can play a role in filtering due to the characteristics of the energy storage capacitor C. The energy stored in the inductor L is used for accumulating power for the load R through a loop formed by the freewheeling diode D, so that the load is ensured to obtain continuous current.
When the switch tube S is conducted, the inductive current is increased, and the inductor stores energy. When the switching tube S is closed, the inductor current decreases and the inductor releases energy. The conduction speed of the switch tube is in MHz level, and the energy storage effect of the rear-stage capacitor is added, so that the charge and discharge are balanced, and the voltage stability is kept.
The existing BUCK power supply includes: the input end power supply Vg, the switch tube S, the inductor L, the load R (or called as a resistor) and the energy storage capacitor C, the input current Is generated by the input end power supply Vg passes through the switch tube S and the inductor L to obtain the output current Iout, the load R Is supplied with power, and the inductor L Is charged at the same time. The switch tube S and the inductor L are respectively connected with the first connecting point, and the inductor L and the energy storage capacitor C are respectively connected with the second connecting point. Fig. 1 also includes a Pulse Width Modulation (PWM) signal output from the control terminal of the switching tube S, and the output frequency of the PWM signal is a fixed frequency.
The conventional BUCK power supply further includes a freewheeling diode D, which is also connected to the first connection point, and the energy stored in the inductor L is accumulated to supply power to the load R through a loop formed by the freewheeling diode D.
As shown in fig. 2, a schematic diagram of an existing APT power supply is shown, an APT power supply structure is developed based on an existing BUCK power supply, and a structure and a principle similar to those of the existing BUCK power supply are not repeated here, please refer to the above description of the structure and the principle similar to those of the existing BUCK power supply in fig. 1. Fig. 2 reveals that the working principle of the existing APT power supply is as follows: the external load outputs an analog voltage VCON through the DAC through the detection of the self power and inputs the voltage VCON into the APT power supply. VCON controls the output frequency of the internal PWM signal, which is variable, so that the APT outputs a voltage value that varies according to VCON. On the LTE terminal, due to the characteristic of variable voltage output, low voltage is output when the load is light, and high voltage is output when the load is heavy, so that the whole power output is matched with the application scene, and the aim of saving power is fulfilled.
Comparing fig. 1 and fig. 2, it can be seen that: because the actual structure of the BUCK power supply and the APT power supply are different, the APT power supply further comprises a newly added control unit, and the control of the output frequency of the internal PWM signal is realized under the control of VCON, so that the APT outputs a voltage value which is changed according to VCON. So compatibility is not achieved in all current schemes. The APT power supply cannot be used by the power supply using the common BUCK, and the power supply of the common BUCK cannot be used by the power supply using the APT power supply, so that the cost of the terminal is increased, and the design flexibility is reduced.
The application scenario adopts the embodiment of the invention, develops aiming at the problem that the BUCK power supply and the APT power supply cannot be compatible in design, integrates the characteristics and the commonality of the BUCK power supply and the APT power supply, designs a power supply scheme which can be compatible with the BUCK power supply and the APT power supply, can specifically be a BUCK power supply scheme with composite output, can improve the efficiency, reduce the power consumption and increase the design flexibility, so that one power supply design scheme can simultaneously support the traditional power supply (BUCK power supply) and the APT power supply with new standard, and is specifically described as follows:
the BUCK power supply scheme (or scheme for realizing compatible power supply output unit) with composite output combines the characteristics and the principle of the BUCK power supply and the APT power supply, achieves the design purpose of combining the BUCK power supply and the APT power supply through innovative circuit design, enables the BUCK power supply scheme and the APT power supply to be compatible, and can be used in one power supply module. The main structure of the BUCK power scheme with composite output is similar to that shown in fig. 1-2, and still includes: fig. 3 is a structural diagram of an example of a combined output BUCK power scheme to which the embodiments of the present invention are applied in the application field, where the innovative circuit design is mainly applied to a control unit, specifically, a PWM control unit, and a high-speed switch is added at a control end of the switching tube S, and the high-speed switch can switch between a fixed frequency (PWM1) and a VCON conversion frequency (PWM2) under the control of a switching signal (SWITCHSIGN), so as to achieve the effect of being compatible with the functions of a normal BUCK and an APT, and the high-speed switch can control switching through an external pin or a register.
It should be noted that, when the normal BUCK is required, the fixed PWM frequency signal source is switched to, and the switching tube S is controlled by a fixed frequency to obtain a fixed voltage output value.
It should be noted that when the APT function is required, the PWM frequency signal source is switched to the VCON conversion, and the switching tube S is controlled by a variable frequency to obtain a variable voltage output value.
It should be noted here that the switching of both the BUCK and APT functions may be performed during scene switching, or may be performed simultaneously with the switching and scene switching.
Based on the structure shown in fig. 3, the specific switching step includes: 1) after the external SWITCHSIGN signal is sent out, the switching flow is started; 2) when the switching is that the common BUCK is switched to the APT function, the control unit obtains a switched voltage value by detecting VCON, and resets the voltage of the common BUCK to be the same as a target voltage value (a value generated by PWM2) of the APT; 3) when the APT function is switched to the common BUCK, the control unit obtains a switched voltage value by detecting a preset value of the common BUCK, and resets the voltage value under the APT function, wherein the voltage value is the same as a target voltage value (a value generated by PWM1) of the common BUCK; 4) the two switches are opened simultaneously, the two groups of voltage output values are communicated, and the voltage values are equal, so that electric leakage cannot be generated; 5) and switching is carried out rapidly, the switched channel is closed, the switched channel is powered on, and voltage seamless switching is realized.
The integrated module according to the embodiment of the present invention may also be stored in a computer-readable storage medium if it is implemented in the form of a software functional module and sold or used as an independent product. Based on such understanding, the technical solutions of the embodiments of the present invention may be essentially implemented or a part contributing to the prior art may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the methods described in the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes. Thus, embodiments of the invention are not limited to any specific combination of hardware and software.
Accordingly, an embodiment of the present invention further provides a computer storage medium, in which a computer program is stored, where the computer program is used to execute the power control method for implementing composite output according to the embodiment of the present invention.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (10)
1. A power control apparatus for implementing a composite output, the apparatus comprising: a detection unit and a control unit; wherein,
the detection unit is used for detecting the mode switching requirement and transmitting the detection result to the control unit;
the control unit is used for detecting a first signal to obtain a switched second voltage value when the detection result is that the first mode is switched to a second mode, and the second voltage value is a target voltage value corresponding to the second mode;
and when the detection result is that the second mode is switched to the first mode, detecting a second signal to obtain a switched first voltage value, wherein the first voltage value is a target voltage value corresponding to the first mode.
2. The apparatus of claim 1, wherein the detection unit is further configured to detect a mode switching requirement according to a switching signal.
3. The apparatus of claim 2, further comprising: the change-over switch is used for switching to be connected with a second Pulse Width Modulation (PWM) signal source when the first mode is switched to the second mode under the control of the switching signal; the output frequency of the second PWM signal source is variable frequency;
and under the control of the switching signal, when the second mode is switched to the first mode, the second mode is switched to be connected with the first PWM signal source; the output frequency of the first PWM signal source is a fixed frequency.
4. The apparatus of claim 3, wherein the switch is located at the control end of the switch tube.
5. The apparatus of claim 4, further comprising: the input end power supply comprises a switching tube, an inductor, a load, an energy storage capacitor and a freewheeling diode;
the input end power supply is connected with the switch tube, the input end power supply is connected with the fly-wheel diode, the switch tube is connected with a first connecting point, the first connecting point is connected with the inductor, the first connecting point is also connected with the fly-wheel diode, the fly-wheel diode is connected with the energy storage capacitor and the load, and the load is grounded;
the inductor is connected with a second connection point, the second connection point is connected with the energy storage capacitor, and the second connection point is also connected with the load;
the change-over switch is respectively connected with the first PWM signal source or the second PWM signal source when the mode is switched, and the second PWM signal source is connected with the control unit;
the control unit is connected to an external load external to the power supply.
6. A method for controlling a power supply to achieve a composite output, the method comprising:
detecting a mode switching requirement to obtain a detection result;
when the detection result is that the first mode is switched to the second mode, detecting a first signal to obtain a switched second voltage value, wherein the second voltage value is a target voltage value corresponding to the second mode;
and when the detection result is that the second mode is switched to the first mode, detecting a second signal to obtain a switched first voltage value, wherein the first voltage value is a target voltage value corresponding to the first mode.
7. The method of claim 6, wherein detecting a mode switch request comprises: and detecting the mode switching requirement according to the switching signal.
8. The method of claim 7, wherein detecting the first signal to obtain a switched second voltage value when the detection result is that the first mode is switched to the second mode, the second voltage value being a target voltage value corresponding to the second mode, comprises:
under the control of the switching signal, when the first mode is switched to the second mode, the switching switch is switched to be connected with a second Pulse Width Modulation (PWM) signal source;
the output frequency of the second PWM signal source is variable frequency.
9. The method of claim 7, wherein detecting a second signal to obtain a switched first voltage value when the detection result is that the second mode is switched to the first mode, the first voltage value being a target voltage value corresponding to the first mode, comprises:
under the control of the switching signal, when the second mode is switched to the first mode, the change-over switch is switched to be connected with the first PWM signal source; the output frequency of the first PWM signal source is a fixed frequency.
10. The method according to claim 8 or 9, characterized in that the method further comprises:
the input end power supply supplies power to the load through the switching tube and the inductor and charges the inductor at the same time;
when the switch tube is conducted, the inductor current is increased, the inductor stores energy, and the energy stored in the inductor is accumulated to supply power to the load through a loop formed by the freewheeling diode;
when the switch tube is closed, the inductor current is reduced, and the inductor releases the stored energy.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510298899.4A CN106300969A (en) | 2015-06-03 | 2015-06-03 | A kind of power control realizing compound output and method |
| PCT/CN2015/093872 WO2016192303A1 (en) | 2015-06-03 | 2015-11-05 | Power supply control device and method for realizing composite output |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510298899.4A CN106300969A (en) | 2015-06-03 | 2015-06-03 | A kind of power control realizing compound output and method |
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| CN106300969A true CN106300969A (en) | 2017-01-04 |
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| CN201510298899.4A Withdrawn CN106300969A (en) | 2015-06-03 | 2015-06-03 | A kind of power control realizing compound output and method |
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| WO (1) | WO2016192303A1 (en) |
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| US20140145693A1 (en) * | 2012-11-23 | 2014-05-29 | Lg Display Co., Ltd. | Pulse width modulation dc-dc converter |
| CN104578783A (en) * | 2013-10-15 | 2015-04-29 | 台达电子企业管理（上海）有限公司 | Converter and method for controlling converter |
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| WO2016192303A1 (en) | 2016-12-08 |
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