阅读说明：本技术 一种串联功率扩展电路和方法 (series power expansion circuit and method ) 是由 刘晓刚 覃锦军 于 2019-10-12 设计创作，主要内容包括：本发明公开了一种串联功率扩展电路和方法,涉及电源设计领域,该电路包括：调压电路控制模块、旁路模块、第一电源模块和第二电源模块,调压电路控制模块用于获取负载所需电压值并据此判断切换电源输出模式,若所需电压大于预设门限电压,则控制旁路模块开启、第一电源模块经过旁路模块直接向负载供电；若所需电压小于预设门限电压,则控制旁路模块关闭、第一电源模块经由串联连接的第二电源模块向负载供电；本发明适用于多口宽电压输出或者是单口多电压输出的PD适配器,实现了电压分段输出、无缝切换,能够有效解决多口宽电压输出适配器的效率低、动态范围小、体积大以及断点切换问题,具有成本低、效率高、恒功率输出、输出电压连续可调的优点。(The invention discloses series power expansion circuits and a method, which relate to the field of power supply design, and the circuit comprises a voltage regulating circuit control module, a bypass module, a power supply module and a second power supply module, wherein the voltage regulating circuit control module is used for acquiring a voltage value required by a load and judging a switching power output mode according to the voltage value, if the required voltage is greater than the preset limit voltage, the bypass module is controlled to be started, the power supply module directly supplies power to the load through the bypass module, and if the required voltage is less than the preset limit voltage, the bypass module is controlled to be stopped, and the power supply module supplies power to the load through the second power supply module connected in series.)

The serial power expansion circuit of kind, characterized by, include power module and second power module of direct series connection, its characterized in that still includes:

and the power expansion module is respectively connected with the th power supply module and the second power supply module and is used for detecting the output voltage of the load at the output end of the second power supply module in real time, and selecting and switching the output voltage from the th power supply module to the second power supply module connected in series to the load according to the output actual voltage value and the automatic comparison and judgment of the preset voltage limit, or directly outputting the voltage to the load by the th power supply module to realize voltage sectional output.

2. The series power spreading circuit of claim 1, wherein the power spreading module comprises a voltage regulating circuit control module and a bypass module, the voltage regulating circuit control module is respectively connected with the th power supply module, the second power supply module and the bypass module, and the bypass module is connected with the second power supply module in parallel;

the voltage regulating circuit control module is used for detecting the output voltage V0 of the second power output end load in real time, compares the magnitude relation of output voltage V0 and preset voltage limit, and when the output voltage V0 is greater than preset voltage limit, the bypass module is automatically controlled to be opened to bypass the second power module, so that the power module passes through the bypass module directly outputs voltage to the load.

3. The series power expansion circuit of claim 2, wherein the voltage regulating circuit control module is further configured to detect an output voltage V0 of the load at the second power output terminal in real time, compare the magnitude relationship between the output voltage V0 and a preset voltage limit, and automatically control the bypass module to turn off and switch the output voltage from the th power module to the second power module connected in series to the load when the output voltage V0 is less than the preset voltage limit.

4. The series power expansion circuit of claim 3, wherein the voltage regulating circuit control module is further configured to control a feedback signal for voltage control to be sent to the th power module when the load output voltage V0 is determined to be equal to a preset voltage limit, where the feedback signal is an FB1 control signal, and control the output voltage VIN of the th power module to be trimmed upward to compensate for the operating voltage drop of the second power module;

the voltage regulating circuit control module is also used for controlling and sending a feedback signal for voltage control when the bypass module is started to carry out bypass work, wherein the feedback signal is an FB2 signal so as to close the second power supply module.

5. The series power extension circuit of claim 4, wherein the voltage regulation circuit control module comprises a third resistor, a fourth resistor, a sixth resistor, a seventh resistor and an eighth resistor, the third resistor and the fourth resistor are connected in series, the sixth resistor, the seventh resistor and the eighth resistor are connected in series, the third resistor and the fourth resistor are connected at a connection point with a second power module, an end of the third resistor is connected with a load output end VO, a end of the fourth resistor is connected with a connection point of the seventh resistor and the eighth resistor, a connection point of the sixth resistor and the seventh resistor is connected with an FB signal input containing a load voltage requirement, and the eighth resistor is connected with a ground GND;

the sixth resistor, the seventh resistor and the FB input end form a signal input network, and the third resistor, the fourth resistor and the FB2 output end form a second power supply voltage regulating network.

6. The series power expansion circuit of claim 5, wherein the voltage regulator circuit control module further comprises a tenth resistor, a fifteenth resistor, a second capacitor, an th diode and a th integrated circuit, the model of the 0 th integrated circuit is TL431, the tenth resistor is connected in series with the fifteenth resistor, the cathode of the 1 th diode is connected with the K pin of the th integrated circuit, the th end of the tenth resistor is connected with the anode of the th diode and the sixth resistor, the other end of the tenth resistor is connected with the R pin of the th integrated circuit, the th end of the fifteenth resistor is connected with the A pin of the th integrated circuit, the second capacitor is connected with the fifteenth resistor in parallel and is connected with an analog AGND, and the th integrated circuit is used for controlling the post-stage circuit according to the input voltage of the FB signal.

7. The series power extension circuit of claim 6, wherein the voltage regulation circuit control module further comprises a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a seventeenth resistor and a second triode, the second triode is a PNP type triode, the twelfth resistor and the seventeenth resistor are connected in series and are grounded in an analog manner, a pin C of the second triode is connected with the bypass module, a pin B of the second triode is connected with an end of the seventeenth resistor, a pin E of the second triode is connected with another end of the seventeenth resistor, a pin twelfth resistor is connected with a thirteenth resistor, a fourteenth resistor and a cathode of the diode, the thirteenth resistor is a compensation feedback resistor, and the fourteenth resistor is combined with the second triode and is used for controlling the switch of the bypass module.

8. The series power spreading circuit of claim 7, wherein the voltage regulating circuit control module further comprises a fifth resistor, a ninth resistor, a tenth resistor, a sixteenth resistor and a capacitor, the fifth, ninth and sixteenth resistors are connected in series and connected to an analog ground AGND, a end of the 0 capacitor is connected to a connection point of the fifth and ninth resistors and connected to the power supply module, another end is connected to the analog ground AGND, a tenth resistor is connected to a connection point of the ninth and sixteenth resistors and connected to a thirteenth resistor, another end is connected to the tenth resistor, a end of the fifth resistor is connected to VIN and connected to the fourteenth resistor, and the fifth resistor, the ninth resistor and an FB1 output end form a power supply voltage regulating network.

9. The series power expansion circuit of claim 8, wherein the bypass module comprises a th resistor, a second resistor, a th Zener diode, and a 0 th triode, the 1 th triode is a PMOS transistor, the 2 th Zener diode is connected in parallel with a 3 th resistor, the th triode has an S pole connected to the th resistor end, a VIN pole and a G pole connected to the th resistor and the end, a second resistor and a D pole connected to the VO pole, the second resistor is connected to a second triode in the regulator circuit control module, and the th triode is turned on or off according to control, and when turned on, directly outputs the output voltage VIN of the th power module to the load output VO and is regulated by the th Zener diode.

10, series power spreading method, using the circuit of claim 1, characterized in that the method comprises the steps of:

presetting voltage limit VINmin according to an application scene;

the power expansion module acquires an FB signal which is input by a load and contains a voltage value V0 required by the load, and compares and judges the relation between the load voltage V0 and a preset limit voltage VINmin;

when the judgment result output voltage V0 is larger than the preset limit voltage, the th power module is automatically controlled to adjust the output voltage VIN, the bypass module is started and directly outputs the output voltage VIN of the th power module to the load output end VO, when the judgment result output voltage V0 is smaller than the preset limit voltage, the bypass module is automatically controlled to be closed, the output voltage VIN of the th power module is transformed by the second power module and then is output to the load output end VO, and segmented output of voltage is achieved.

Technical Field

The invention relates to the field of power supply design, in particular to series power expansion circuits and a method.

Background

With the continuous development of society, power adapter products are increasingly required to meet various electronic terminal devices under the market application guidance, and particularly, the PD adapters aiming at large dynamic voltage output such as TYPE C and the like are particularly required to meet the requirements of various electronic terminal devices, relatively severe problems of small dynamic range and poor product design exist in the market, the traditional method is to design a main power supply into a high-voltage output power supply and then output the high-voltage output power supply through a multi-path DC-DC voltage reduction circuit, the circuit has the advantages that the product frame is simple , the debugging is very quick, the AC power supply and the DC-DC power supply have high repeated power, namely the DC-DC power supply power needs to be output the power similar to that of the AC power supply , the product efficiency is very low, the cost is high, the volume of the PD adapters with multi-voltage output is difficult to pass through American VI DOE and European standards, and the volume of the PD adapters with multi-voltage output is difficult to be made to be small.

Therefore, series power expansion circuits and methods need to be designed to provide solutions to the problems of low efficiency, small dynamic range, large size, and constant power output of the multi-port wide voltage output adapter.

Disclosure of Invention

In order to solve the problems in the prior art, the embodiment of the invention provides series power expansion circuits and methods which are low in cost, high in efficiency, constant in power output, voltage segmented in output and continuously adjustable.

The technical scheme provided by the invention for the technical problem is as follows:

, an embodiment of the invention provides series power spreading circuits, the circuits including:

the power expansion module is respectively connected with the th power module and the second power module and is used for detecting the output voltage of a load at the output end of the second power module in real time, and selecting to switch the th power module to the second power module connected in series to output voltage to the load according to the actual output voltage value and automatic comparison and judgment according to the preset voltage limit, or directly outputting the voltage to the load by the th power module to realize voltage sectional output;

the power expansion module comprises a voltage regulating circuit control module and a bypass module, wherein the voltage regulating circuit control module is respectively connected with the th power module, the second power module and the bypass module, the bypass module is connected with the second power module in parallel, the voltage regulating circuit control module is used for detecting the output voltage V0 of the load at the output end of the second power supply in real time, comparing the magnitude relation between the output voltage V0 and the preset limit voltage, and automatically controlling the bypass module to be started to bypass the second power module when the output voltage V0 is greater than the preset limit voltage, so that the th power module directly outputs voltage to the load through the bypass module;

the voltage regulating circuit control module is further used for detecting the output voltage V0 of the load at the output end of the second power supply in real time, comparing the magnitude relation between the output voltage V0 and the preset limit voltage, automatically controlling the bypass module to be closed when the output voltage V0 is smaller than the preset limit voltage, and switching the second power supply module connected in series from the -th power supply module to the second power supply module connected in series to output voltage to the load;

the voltage regulating circuit control module is also used for controlling to send a feedback signal for voltage control to the th power module when the load output voltage V0 is judged to be equal to a preset voltage limit, wherein the feedback signal is an FB1 control signal, and controlling the output voltage VIN of the th power module to be finely adjusted upwards so as to make up for the working voltage drop of the second power module;

the voltage regulating circuit control module comprises a third resistor, a fourth resistor, a sixth resistor, a seventh resistor and an eighth resistor, wherein the third resistor and the fourth resistor are connected in series, the sixth resistor, the seventh resistor and the eighth resistor are connected in series, a connecting point of the third resistor and the fourth resistor is connected with a second power supply module, an end of the third resistor is connected with a load output end VO, a end of the fourth resistor is connected with a connecting point of the seventh resistor and the eighth resistor, the connecting point of the sixth resistor and the seventh resistor is connected with an FB signal input containing a load voltage requirement, and the eighth resistor is grounded GND;

the voltage regulating circuit control module further comprises a tenth resistor, a fifteenth resistor, a second capacitor, an th diode and a th integrated circuit, wherein the model of the 0 th integrated circuit is TL431, the tenth resistor is connected with the fifteenth resistor in series, the cathode of the 1 th diode is connected with the K pin of the 2 th integrated circuit, the end of the tenth resistor is connected with the anode of the th diode and the sixth resistor, the other end of the tenth resistor is connected with the R pin of the th integrated circuit, the end of the fifteenth resistor is connected with the A pin of the th integrated circuit, the second capacitor is connected with the fifteenth resistor in parallel and is connected with an analog ground AGND, the th integrated circuit is used for controlling a rear-stage circuit according to the input voltage of an FB signal, and the th integrated circuit is used for controlling the rear-stage circuit according to the input voltage of the FB signal;

the voltage regulating circuit control module further comprises a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a seventeenth resistor and a second triode, wherein the second triode is a PNP type triode, the twelfth resistor and the seventeenth resistor are connected in series and are connected in parallel to an analog ground AGND, a pin C of the second triode is connected with the bypass module, a pin B of the second triode is connected with an end of the seventeenth resistor, a pin E of the second triode is connected with another end of the seventeenth resistor, a pin twelfth end is connected with a thirteenth resistor, a fourteenth resistor and a diode cathode of the , the thirteenth resistor is a compensation feedback resistor, and the fourteenth resistor is combined with the second triode and used for controlling the bypass module to be switched on and off.

The voltage regulating circuit control module further comprises a fifth resistor, a ninth resistor, a tenth resistor, a sixteenth resistor and a capacitor, wherein the fifth, ninth and sixteenth resistors are connected in series and are connected with an analog ground AGND, the end of the 0 capacitor is connected to the connection point of the fifth and ninth resistors and is connected with a power supply module, the other end of the capacitor is connected with the analog ground AGND, the end of the tenth resistor is connected to the connection point of the ninth and sixteenth resistors and is connected with a thirteenth resistor, the other end of the tenth resistor is connected with the tenth resistor, the end of the fifth resistor is connected with VIN and is connected with the fourteenth resistor, and the output ends of the fifth resistor, the ninth resistor and the FB1 form a power supply voltage regulating network;

the bypass module comprises an th resistor, a second resistor, a th voltage stabilizing diode and a 0 th triode, wherein the 1 th triode is a PMOS (P-channel metal oxide semiconductor) transistor, the 2 th voltage stabilizing diode is connected with the 3 th resistor in parallel, the th triode is connected with the th resistor end in an S pole mode, the VIN and G poles are connected with the th resistor and the end in an other mode, the second resistor and the D pole are connected with VO, the second resistor is connected with a second triode in the voltage regulating circuit control module, and the th triode is used for being switched on or off according to control, directly outputting the output voltage VIN of the th power supply module to the load output end VO when the power supply module is switched on and carrying out voltage regulation through the th voltage.

In another aspect, embodiments of the present invention provide methods for serial power spreading, the methods including:

presetting voltage limit VINmin according to an application scene;

presetting voltage limit VINmin according to an application scene;

the power expansion module acquires an FB signal which is input by a load and contains a voltage value V0 required by the load, and compares and judges the relation between the load voltage V0 and a preset limit voltage VINmin;

when the judgment result output voltage V0 is larger than the preset limit voltage, the th power module is automatically controlled to adjust the output voltage VIN, the bypass module is started and directly outputs the output voltage VIN of the th power module to the load output end VO, when the judgment result output voltage V0 is smaller than the preset limit voltage, the bypass module is automatically controlled to be closed, the output voltage VIN of the th power module is transformed by the second power module and then is output to the load output end VO, and segmented output of voltage is achieved.

The technical scheme provided by the embodiment of the invention has the following beneficial effects:

the series power expansion circuits and the method provided by the embodiment of the invention perform corresponding control through a voltage regulating circuit control module according to voltage required by a load, when the required voltage is greater than preset limit voltage through a preset limit voltage relation output voltage V0, control a power module to process alternating current input (mains supply and the like), and then start a bypass module to directly output, namely, the bypass module is used for short-circuiting a second power module to directly output the voltage to the load, when the required voltage is less than preset limit voltage through the preset limit voltage relation output voltage V7, control the bypass module to close, and process the voltage output of a power module through the second power module to output to the load.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a system block diagram of series power spreading circuits provided in of the present invention;

fig. 2 is a schematic diagram of a system of series power spreading circuits provided in of the present invention;

FIG. 3 is a detailed schematic diagram of the series power spreading circuits provided by of the present invention;

fig. 4 is a flowchart of serial power spreading methods according to the second embodiment of the present invention.

Detailed Description

The invention aims to solve the problems of low efficiency, small dynamic range, large volume and constant power output of a multi-port wide voltage output adapter in the prior art, and provides a series power expansion circuit and a method thereof.

To make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in further with reference to the accompanying drawings.