WO2020228246A1 - 一种电源过滤转换器 - Google Patents

一种电源过滤转换器 Download PDF

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Publication number
WO2020228246A1
WO2020228246A1 PCT/CN2019/112910 CN2019112910W WO2020228246A1 WO 2020228246 A1 WO2020228246 A1 WO 2020228246A1 CN 2019112910 W CN2019112910 W CN 2019112910W WO 2020228246 A1 WO2020228246 A1 WO 2020228246A1
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capacitor
resistor
circuit
terminal
coil
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PCT/CN2019/112910
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English (en)
French (fr)
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胡小明
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深圳市威拓思音乐有限公司
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Publication of WO2020228246A1 publication Critical patent/WO2020228246A1/zh

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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
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only

Definitions

  • This application relates to voltage conversion equipment, and more specifically to a power filter converter.
  • the existing converter has a complicated structure, inconvenient installation, large volume, and inconvenient carrying.
  • the purpose of this application is to overcome the defects of the prior art and provide a power filter converter.
  • a power filter converter includes a housing and a circuit board; the circuit board carries a control circuit; the control circuit includes a main control circuit, an input filter circuit connected to the input end of the active circuit, and is electrically connected to the main control circuit The connected transformer circuit, an output filter circuit arranged at the output end of the transformer circuit, and an electrical interface with the output filter circuit; the main control circuit is provided with a control chip.
  • the active circuit includes a control chip U1 whose model is LM3481MM; the terminal pin VIN of the control chip U1 is connected to the input filter circuit, and the terminal pin DR is connected to the gate G of the MOS tube Q1 Connect, the compensation terminal COMP is grounded through the capacitor C9, connected in series through the capacitor C5 and the resistor R10, the feedback terminal FB is connected to the output of the transformer circuit, and the terminal UVLO is connected to the input filter circuit through the resistor R4 and grounded through the resistor R5 ,
  • the terminal pin Isen is connected to the source S of the MOS transistor Q1 through the resistor R3; wherein the drain D of the MOS transistor Q1 is connected to the transformer circuit, and the source S is grounded through the resistor R11; the feedback terminal FB is changed by the resistor R12
  • the output terminal of the voltage circuit is connected; the feedback terminal FB is grounded through resistors R7 and R8; the input terminal of the resistor R12 is grounded through a capacitor C19.
  • the transformer circuit includes a transformer coil L1, wherein the transformer coil L1 includes a primary coil and a secondary coil; the input end of the primary coil is connected to the input filter circuit, and the output end is connected to the MOS tube Q1 One end of the secondary coil is grounded, and the other end is connected to the output filter circuit provided; one end of the primary coil connected to the MOS tube Q1, and one end of the secondary coil connected to the output filter through capacitor C3, capacitor C4 Connection, in which the capacitor C3 and the capacitor C4 are connected in parallel.
  • the output end of the secondary coil is connected to the output filter circuit through the diode D1 and the coil L2; wherein the input end of the diode D1 is connected to the secondary coil, and the diode D1 is provided with a resistor R2.
  • the capacitor C17 is connected in series and then connected in parallel; the filter circuit between the diode D1 and the coil L2; the filter circuit includes a capacitor C20, a capacitor C6, a capacitor C8 and a capacitor C14, and one end of the capacitor C20, the capacitor C6, the capacitor C8 and the capacitor C14 is connected to the coil
  • the input end of L2 is connected, and the other end is grounded.
  • the output filter circuit includes a capacitor C15, a capacitor C7, a capacitor C18, and a resistor R9; one end of the capacitor C15, the capacitor C7, the capacitor C18, and the resistor R9 is connected to the interface, and the other end is grounded; the input The filter circuit includes a capacitor C1, a capacitor C2, a capacitor C16, and a capacitor C10. One end of the capacitor C1, the capacitor C2, the capacitor C16, and the capacitor C10 is connected to the circuit input terminal, and the other end is grounded; the input filter circuit is connected to the input interface.
  • the main control circuit includes a control chip U2, the model of which is OC6801B/SOP8; the terminal pin VDD and the terminal pin EN of the control chip U2 are connected to the input filter circuit through a resistor R4, and the terminal pins VDD,
  • the terminal EN is grounded through the capacitor C10 and the diode D6; the input of the diode is connected to the ground; the terminal DRV is connected to the gate G of the MOS transistor Q2 through the resistor R9, and the terminal VCS is connected to the MOS through the resistor R10
  • the source S of the tube Q2 is connected; the terminal pin COMP is connected to the provided feedback circuit, and the feedback circuit is connected to the output end of the transformer circuit; the source S of the MOS tube Q2 is grounded through a resistor R8.
  • the transformer circuit includes a transformer coil L3; the transformer coil L3 includes a primary winding and a secondary winding; one end of the primary winding is connected to the input filter circuit, and the other end is connected to the leakage of the MOS tube Q2
  • the pole D is connected; a resistor R11, a capacitor C8, and a diode D8 are connected between the input end and the output end of the primary winding, wherein the resistor R11 and the resistor C8 are connected in parallel with the diode D8; the current input end of the diode D8 is connected to the primary
  • the output end of the winding is connected; one end of the secondary winding is grounded, and the other end is connected to the output filter circuit through a diode D6 and a coil L4; the diode D6 is connected in parallel with a capacitor C14 and a resistor R6, and the capacitor C14 and the resistor R6 are connected in series.
  • the input end of the coil L4 is connected to the capacitor C1 and the capacitor C5, and the output end is connected to the capacitor C6 and the capacitor C16; wherein the other ends of the capacitor C1, the capacitor C5, the capacitor C6 and the capacitor C16 are grounded.
  • the output filter circuit includes a resistor R14 and a capacitor C15; the resistor R14 and the capacitor C15 are connected to one end of the output interface, and the other end is grounded; a stabilizer is also provided between the output filter circuit and the coil L4
  • the voltage stabilizing circuit includes a transistor Q4, a resistor R5 and a capacitor C9; the collector of the transistor Q4 is connected to the output of the coil L4, the emitter is connected to the output filter circuit, and the base is connected to the output of the coil through the resistor R5 The terminal is connected and grounded through the capacitor C9.
  • the feedback circuit includes an isolation chip IC1, the model of which is EL3H7(C)(TA)-C; the terminal pin 4 of the isolation chip IC1 is connected to the terminal pin COMP of the control chip U2 through a resistor R1, Pin 3 is grounded, pin 1 is connected to the output of coil L4 through resistor R13, and pin 2 is connected to the output of coil L4 through resistor R13, and is grounded through resistors R2 and R3; terminal pin 2 is grounded through capacitor C18, There is also terminal pin 2 connected to the Zener diode U9, the model of the Zener diode U9 is CJ431; the anode 2 of the Zener diode U9 is grounded, the cathode 3 is connected to the terminal pin 2 of the isolation chip IC1, and the control electrode 1 is connected to the anode through the capacitor C4 The anode 1 is connected to the control electrode 1 through the capacitor C3 and the resistor R16 in series, and the control electrode 1 is connected to the node
  • the present application has the following beneficial effects: the present application has a simple structure, a small volume and is convenient to carry.
  • the converter circuit is simple, the input voltage range is wide, and the output voltage is stable.
  • Figure 1 is an exploded view of the structure of a power filter converter of this application
  • Embodiment 2 is a circuit schematic diagram of Embodiment 1 of a power filtering converter of this application;
  • FIG. 3 is a circuit schematic diagram of Embodiment 2 of a power filtering converter of this application.
  • FIGS 1 to 3 are drawings of the embodiments of this application.
  • a power filter converter as shown in FIG. 1, includes a casing 10 and a circuit board 11.
  • the circuit board 11 carries a control circuit.
  • the control circuit includes a main control circuit, an input filter circuit connected to the input end of the active circuit, a transformer circuit electrically connected to the main control circuit, an output filter circuit at the output end of the transformer circuit, and an electrical interface with the output filter circuit .
  • the main control circuit is provided with a control chip.
  • the housing 10 has a tubular structure with an inner cavity open at both ends, and the circuit board 11 is fixed in the inner cavity of the housing 10 through a mounting seat 12 provided.
  • Two ends of the mounting base 12 are provided with vertical plates 121, and the vertical plates 121 are provided with openings for passing through the input interface and output interface of the circuit board 11.
  • the vertical plate 121 can also be used as a closed plate to seal both ends of the inner cavity.
  • Embodiment 1 as shown in Fig. 2, wide voltage input, fixed voltage output, DC 7V-20V input, independent output of 9V, 12V, 18V, with non-isolation and ripple filtering effect. And with LINK function, it can be bridged to another power filter converter.
  • the specific circuit principle is as follows:
  • the active circuit includes the control chip U1, whose model is LM3481MM.
  • the terminal pin VIN of the control chip U1 is connected to the input filter circuit
  • the terminal pin DR is connected to the gate G of the MOS transistor Q1
  • the compensation terminal COMP is grounded through the capacitor C9, connected in series through the capacitor C5 and the resistor R10, and grounded
  • feedback Terminal pin FB is connected to the output terminal of the transformer circuit
  • terminal pin UVLO is connected to the input filter circuit through resistor R4 and grounded through resistor R5
  • terminal pin Isen is connected to source S of MOS transistor Q1 through resistor R3; among them, MOS transistor Q1
  • the drain D of is connected to the transformer circuit, and the source S is grounded through a resistor R11.
  • the feedback terminal FB is connected to the output terminal of the transformer circuit through a resistor R12; the feedback terminal FB is grounded through resistors R7 and R8; the input terminal of the resistor R12 is grounded through a capacitor C19.
  • the MOS tube Q1 is controlled by the chip U1 and functions as a switch.
  • the transformer circuit includes a transformer coil L1, wherein the transformer coil L1 includes a primary coil and a secondary coil.
  • the input end of the primary coil is connected with the input filter circuit, and the output end is connected with the drain D of the MOS transistor Q1; one end of the secondary coil is grounded, and the other end is connected with the provided output filter circuit.
  • One end of the primary coil connected to the MOS tube Q1 and one end of the secondary coil connected to the output filter are connected through a capacitor C3 and a capacitor C4, wherein the capacitor C3 and the capacitor C4 are connected in parallel.
  • the output end of the secondary coil is connected to the output filter circuit through the provided diode D1 and the coil L2; wherein the input end of the diode D1 is connected to the secondary coil, and the diode D1 is connected in parallel by having the resistor R2 and the capacitor C17 connected in series.
  • the filter circuit includes a capacitor C20, a capacitor C6, a capacitor C8, and a capacitor C14. One end of the capacitor C20, the capacitor C6, the capacitor C8, and the capacitor C14 is connected to the input terminal of the coil L2, and the other end is grounded.
  • the output filter circuit includes a capacitor C15, a capacitor C7, a capacitor C18, and a resistor R9; the capacitor C15, the capacitor C7, the capacitor C18, and the resistor R9 are all connected to the interface at one end and grounded at the other end.
  • the input filter circuit includes a capacitor C1, a capacitor C2, a capacitor C16, and a capacitor C10. One end of the capacitor C1, the capacitor C2, the capacitor C16, and the capacitor C10 is connected to the input end of the circuit, and the other end is grounded.
  • the input filter circuit is connected with the input interface.
  • Embodiment 2 as shown in Fig. 3, wide voltage input, divided into two fixed voltage outputs, one output two, that is, it has one input interface and two output interfaces, but it is not limited to two output interfaces.
  • the input interface inputs DC 5V-18V input, and outputs 9V, 12V, 18V separately, with isolation function, but with filtering ripple function.
  • the main control circuit includes the control chip U2, whose model is OC6801B/SOP8.
  • the terminal pin VDD and the terminal pin EN of the control chip U2 are connected to the input filter circuit through a resistor R4, and the terminal pin VDD and the terminal pin EN are grounded through a capacitor C10 and grounded through a diode D6.
  • the input end of the diode is connected to the ground;
  • the terminal DRV is connected to the gate G of the MOS transistor Q2 through a resistor R9, and the terminal VCS is connected to the source S of the MOS transistor Q2 through a resistor R10;
  • the terminal COMP and the The feedback circuit is connected, and the feedback circuit is connected with the output terminal of the transformer circuit.
  • the source S of the MOS transistor Q2 is grounded through a resistor R8.
  • the transformer circuit includes a transformer coil L3.
  • the transformer coil L3 includes a primary winding and a secondary winding. One end of the primary winding is connected to the input filter circuit, and the other end is connected to the drain D of the MOS transistor Q2.
  • a resistor R11, a capacitor C8, and a diode D8 are connected between the input end and the output end of the primary winding, wherein the resistor R11 and the resistor C8 are connected in parallel and then connected to the diode D8.
  • the current input terminal of the diode D8 is connected to the output terminal of the primary winding.
  • One end of the secondary winding is grounded, and the other end is connected to the output filter circuit through a diode D6 and a coil L4.
  • the diode D6 is connected in parallel with a capacitor C14 and a resistor R6, and the capacitor C14 and the resistor R6 are connected in series.
  • the input end of the coil L4 is connected to the capacitor C1 and the capacitor C5, and the output end is connected to the capacitor C6 and the capacitor C16; among them, the other ends of the capacitor C1, the capacitor C5, the capacitor C6, and the capacitor C16 are grounded.
  • the output filter circuit includes a resistor R14 and a capacitor C15.
  • the resistor R14 and the capacitor C15 are connected to one end of the output interface, and the other end is grounded.
  • the voltage stabilizing circuit includes a transistor Q4, a resistor R5 and a capacitor C9.
  • the collector of the transistor Q4 is connected to the output end of the coil L4, the emitter is connected to the output filter circuit, the base is connected to the output end of the coil through a resistor R5, and is grounded through a capacitor C9.
  • the feedback circuit includes an isolation chip IC1, whose model is EL3H7(C)(TA)-C.
  • the terminal pin 4 of the isolation chip IC1 is connected to the control chip U2 terminal pin COMP through the resistor R1, the terminal pin 3 is grounded, the terminal pin 1 is connected to the output terminal of the coil L4 through the resistor R13, and the terminal pin 2 is connected to the output terminal of the coil L4 through the resistor R13 , And grounded through resistor R2 and resistor R3.
  • the terminal pin 2 is grounded through the capacitor C18, and the terminal pin 2 is connected to the Zener diode U9.
  • the model of the Zener diode U9 is CJ431.
  • the anode 2 of the Zener diode U9 is grounded, the cathode 3 is connected to the terminal pin 2 of the isolation chip IC1, the control electrode 1 is connected to the anode through the capacitor C4, and the anode 1 is connected to the control electrode 1 through the capacitor C3 and the resistor R16 in series. 1 is connected to the node between resistor R2 and resistor R3.
  • the transformer coil L3 is transformed and then rectified by L4, and then filtered, and the output voltage is fed back to the control chip U2 through the feedback circuit.
  • the application has a simple structure, small volume and convenient carrying.
  • the converter circuit is simple, the input voltage range is wide, and the output voltage is stable.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)

Abstract

本申请涉及一种电源过滤转换器，包括壳体，及电路板；所述电路板承载有控制电路；所述控制电路包括主控电路，与主动电路输入端连接的输入滤波电路，与主控电路电性连接的变压电路，设于变压电路输出端的输出滤波电路，及与输出滤波电路电性的接口；所述主控电路设有控制芯片。本申请结构简单，体积小，方便携带。转换器电路简单，输入电压范围宽，输出电压稳定。

Description

一种电源过滤转换器
本申请是以申请号为201920680578.4、申请日为2019年5月13日的中国专利申请为基础，并主张其优先权，该申请的全部内容在此作为整体引入本申请中。
技术领域
本申请涉及电压转换设备，更具体地说是指一种电源过滤转换器。
背景技术
在电子乐器行业，很多电子乐器各自需要不同的电压，这就需要电源过滤转换器。现有的电源过滤转换器体积较大，携带不方便，而且转换过来的电压不够稳定，影响电子乐器的使用。有些转换器的输入电压范围过窄，转换器起不到作用。
而且，现有转换器的结构复杂，安装不方便，体积大，携带也不方便。
申请内容
本申请的目的在于克服现有技术的缺陷，提供一种电源过滤转换器。
为实现上述目的，本申请采用以下技术方案：
一种电源过滤转换器，包括壳体，及电路板；所述电路板承载有控制电路；所述控制电路包括主控电路，与主动电路输入端连接的输入滤波电路，与主控电路电性连接的变压电路，设于变压电路输出端的输出滤波电路，及与输出滤波电路电性的接口；所述主控电路设有控制芯片。
其进一步技术方案为：所述主动电路包括控制芯片U1，其型号为LM3481MM；所述控制芯片U1的端脚VIN与输入滤波电路的连接，端脚DR与设有的MOS管Q1的栅极G连接，补偿端脚COMP通过电容C9接地、通过电容C5、电阻R10串联后接地，反馈端脚FB与变压电路的输出端连接，端脚UVLO通过电阻R4与输入滤波电路连接且通过电阻R5接地，端脚Isen通过电阻R3与MOS管Q1的源极S连接；其中，MOS管Q1的漏极D与变压电路连接，源极S通过电阻R11接地；所述反馈端脚FB通过电阻R12变压电路的输出端连接；其中，反馈端脚FB通过电阻R7、R8接地；电阻R12的输入端通过电容C19接地。
其进一步技术方案为：所述变压电路包括变压线圈L1，其中，变压线圈L1包括初级线圈与次级线圈；所述初级线圈的输入端与输入滤波电路连接，输出端与MOS管Q1的漏极D连接；次级线圈一端接地，另一端与设有的输出滤波电路连接；所述初级线圈与MOS管Q1连接的一端、次级线圈与输出滤波连接的一端通过电容C3、电容C4连接，其中，电容C3、电容C4并联。
其进一步技术方案为：所述次级线圈的输出端通过设有的二极管D1、线圈L2与输出滤波电路连接；其中，二极管D1输入端与次级线圈连接，并且二极管D1通过设有电阻R2、电容C17串联后并联；所述二极管D1与线圈L2之间滤波电路；所述滤波电路包括电容C20、电容C6、电容C8及电容C14，且电容C20、电容C6、电容C8及电容C14一端与线圈L2入端连接，另一端接地。
其进一步技术方案为：所述输出滤波电路包括电容C15、电容C7、电容C18及电阻R9；所述电容C15、电容C7、电容C18及电阻R9均一端与接口连接，另一端接地；所述输入滤波电路包括电容C1、电容C2、电容C16及电容C10，且电容C1、电容C2、电容C16及电容C10一端与电路输入端连接，另一端接地；所述输入滤波电路与输入接口连接。
其进一步技术方案为：所述主控电路包括控制芯片U2，其型号为OC6801B/SOP8；所述控制芯片U2的端脚VDD、端脚EN通过电阻R4与输入滤波电路连接，且端脚VDD、端脚EN通过电容C10接地、通过二极管D6接地；所述二极管的输入端与地连接；端脚DRV通过电阻R9与设有的MOS管Q2的栅极G连接，端脚VCS通过电阻R10与MOS管Q2的源极S连接；端脚COMP与设有的反馈电路连接，且反馈电路与变压电路的输出端连接；所述MOS管Q2的源极S通过电阻R8接地。
其进一步技术方案为：所述变压电路包括变压线圈L3；所述变压线圈L3包括一次绕组及二次绕组；所述一次绕组一端与输入滤波电路连接，另一端与MOS管Q2的漏极D连接；所述一次绕组的输入端与输出端之间连接有电阻R11、电容C8及二极管D8，其中，电阻R11与电阻C8并联后与二极管D8连接；所述二极管D8电流输入端与一次绕组的输出端连接；所述二次绕组的一端接地，另一端通过二极管D6、线圈L4与输出滤波电路连接；所述二极管D6并联有电容C14、电阻R6，且电容C14与电阻R6串联连接。
其进一步技术方案为：所述线圈L4的输入端与电容C1、电容C5连接，输出端与电容C6、电容C16连接；其中，电容C1、电容C5、电容C6、电容C16另一端接地。
其进一步技术方案为：所述输出滤波电路包括电阻R14、电容C15；所述电阻R14、电容C15连接在输出接口一端，且另一端接地；所述输出滤波电路与线圈L4之间还设有稳压电路；所述稳压电路包括三极管Q4、电阻R5及电容C9；所述三极管Q4的集电极与线圈L4的输出端连接，发射极与输出滤波电路连接，基极通过电阻R5与线圈的输出端连接，且通过电容C9接地。
其进一步技术方案为：所述反馈电路包括隔离芯片IC1，其型号为EL3H7(C)(TA)-C；所述隔离芯片IC1的端脚4通过电阻R1与控制芯片U2端脚COMP连接，端脚3接地，端脚1通过电阻R13与线圈L4输出端连接，端脚2通过电阻R13与线圈L4的输出端连接，并且通过电阻R2及电阻R3接地；其中，端脚2通过电容C18接地，还有端脚2与稳压二极管U9连接，稳压二极管U9的型号为CJ431；稳压二极管U9的正极2接地，负极3与隔离芯片IC1的端脚2连接，控制极1通过电容C4与正极连接，并且正极1通过电容C3与电阻R16串联后与控制极1连接，控制极1与电阻R2及电阻R3之间的节点连接。
本申请与现有技术相比的有益效果是：本申请结构简单，体积小，方便携带。还有，转换器电路简单，输入电压范围宽，输出电压稳定。
下面结合附图和具体实施例对本申请作进一步描述。
附图说明
图1为本申请一种电源过滤转换器的结构爆炸图；
图2为本申请一种电源过滤转换器的实施例1电路原理图；
图3为本申请一种电源过滤转换器的实施例2电路原理图。
具体实施方式
为了更充分理解本申请的技术内容，下面结合具体实施例对本申请的技术方案进一步介绍和说明，但不局限于此。
如图1至图3本申请实施例的图纸。
一种电源过滤转换器，如图1所示，包括壳体10，及电路板11。电路板11承载 有控制电路。控制电路包括主控电路，与主动电路输入端连接的输入滤波电路，与主控电路电性连接的变压电路，设于变压电路输出端的输出滤波电路，及与输出滤波电路电性的接口。主控电路设有控制芯片。
具体的，壳体10为管状结构，两端开口的内腔，电路板11通过设有的安装座12固定在壳体10的内腔。安装座12两端为设有竖板121，且竖板121上设有用于通过电路板11的输入接口和输出接口的开口。竖板121还可以作为封闭板，封堵在内腔的两端。
实施例1，如图2所示，宽电压输入，固定电压输出，直流7V-20V输入，单独输出9V、12V、18V，具有非隔离、过滤纹波作用。并且带LINK功能，可以桥接至另一个电源过滤转换器。其具体的电路原理如下：
主动电路包括控制芯片U1，其型号为LM3481MM。控制芯片U1的端脚VIN与输入滤波电路的连接，端脚DR与设有的MOS管Q1的栅极G连接，补偿端脚COMP通过电容C9接地、通过电容C5、电阻R10串联后接地，反馈端脚FB与变压电路的输出端连接，端脚UVLO通过电阻R4与输入滤波电路连接且通过电阻R5接地，端脚Isen通过电阻R3与MOS管Q1的源极S连接；其中，MOS管Q1的漏极D与变压电路连接，源极S通过电阻R11接地。反馈端脚FB通过电阻R12变压电路的输出端连接；其中，反馈端脚FB通过电阻R7、R8接地；电阻R12的输入端通过电容C19接地。MOS管Q1的受到芯片U1的控制，作为开关的作用。
变压电路包括变压线圈L1，其中，变压线圈L1包括初级线圈与次级线圈。初级线圈的输入端与输入滤波电路连接，输出端与MOS管Q1的漏极D连接；次级线圈一端接地，另一端与设有的输出滤波电路连接。初级线圈与MOS管Q1连接的一端、次级线圈与输出滤波连接的一端通过电容C3、电容C4连接，其中，电容C3、电容C4并联。
次级线圈的输出端通过设有的二极管D1、线圈L2与输出滤波电路连接；其中，二极管D1输入端与次级线圈连接，并且二极管D1通过设有电阻R2、电容C17串联后并联。二极管D1与线圈L2之间滤波电路。滤波电路包括电容C20、电容C6、电容C8及电容C14，且电容C20、电容C6、电容C8及电容C14一端与线圈L2入端连接，另一端接地。
输出滤波电路包括电容C15、电容C7、电容C18及电阻R9；所述电容C15、电容C7、电容C18及电阻R9均一端与接口连接，另一端接地。输入滤波电路包括电容C1、电容C2、电容C16及电容C10，且电容C1、电容C2、电容C16及电容C10一端与电路输入端连接，另一端接地。输入滤波电路与输入接口连接。
实施例2，如图3所示，宽电压输入，分两路固定电压输出，一出二，即具有一个输入接口，二个输出接口，但是不限于两个输出接口。输入接口输入直流5V-18V输入，单独输出9V、12V、18V，具有隔离功能，但具有过滤纹波功能。同时，不带LINK功能。
主控电路包括控制芯片U2，其型号为OC6801B/SOP8。控制芯片U2的端脚VDD、端脚EN通过电阻R4与输入滤波电路连接，且端脚VDD、端脚EN通过电容C10接地、通过二极管D6接地。二极管的输入端与地连接；端脚DRV通过电阻R9与设有的MOS管Q2的栅极G连接，端脚VCS通过电阻R10与MOS管Q2的源极S连接；端脚COMP与设有的反馈电路连接，且反馈电路与变压电路的输出端连接。MOS管Q2的源极S通过电阻R8接地。
变压电路包括变压线圈L3。变压线圈L3包括一次绕组及二次绕组。一次绕组一端与输入滤波电路连接，另一端与MOS管Q2的漏极D连接。一次绕组的输入端与输出端之间连接有电阻R11、电容C8及二极管D8，其中，电阻R11与电阻C8并联后与二极管D8连接。二极管D8电流输入端与一次绕组的输出端连接。二次绕组的一端接地，另一端通过二极管D6、线圈L4与输出滤波电路连接。二极管D6并联有电容C14、电阻R6，且电容C14与电阻R6串联连接。
线圈L4的输入端与电容C1、电容C5连接，输出端与电容C6、电容C16连接；其中，电容C1、电容C5、电容C6、电容C16另一端接地。
输出滤波电路包括电阻R14、电容C15。电阻R14、电容C15连接在输出接口一端，且另一端接地。输出滤波电路与线圈L4之间还设有稳压电路。稳压电路包括三极管Q4、电阻R5及电容C9。三极管Q4的集电极与线圈L4的输出端连接，发射极与输出滤波电路连接，基极通过电阻R5与线圈的输出端连接，且通过电容C9接地。
反馈电路包括隔离芯片IC1，其型号为EL3H7(C)(TA)-C。隔离芯片IC1的端脚4通 过电阻R1与控制芯片U2端脚COMP连接，端脚3接地，端脚1通过电阻R13与线圈L4输出端连接，端脚2通过电阻R13与线圈L4的输出端连接，并且通过电阻R2及电阻R3接地。其中，端脚2通过电容C18接地，还有端脚2与稳压二极管U9连接，稳压二极管U9的型号为CJ431。稳压二极管U9的正极2接地，负极3与隔离芯片IC1的端脚2连接，控制极1通过电容C4与正极连接，并且正极1通过电容C3与电阻R16串联后与控制极1连接，控制极1与电阻R2及电阻R3之间的节点连接。变压线圈L3变压后通过再通过L4整流，然后经过滤波，输出电压经过反馈电路反馈至控制芯片U2。
本申请结构简单，体积小，方便携带。还有，转换器电路简单，输入电压范围宽，输出电压稳定。
上述仅以实施例来进一步说明本申请的技术内容，以便于读者更容易理解，但不代表本申请的实施方式仅限于此，任何依本申请所做的技术延伸或再创造，均受本申请的保护。本申请的保护范围以权利要求书为准。
发明概述
技术问题
问题的解决方案
发明的有益效果

Claims (10)

  1. 一种电源过滤转换器，包括壳体，及电路板；所述电路板承载有控制电路；其特征在于，所述控制电路包括主控电路，与主动电路输入端连接的输入滤波电路，与主控电路电性连接的变压电路，设于变压电路输出端的输出滤波电路，及与输出滤波电路电性的接口；所述主控电路设有控制芯片。
  2. 根据权利要求1所述的一种电源过滤转换器，其特征在于，所述主动电路包括控制芯片U1，其型号为LM3481MM；所述控制芯片U1的端脚VIN与输入滤波电路的连接，端脚DR与设有的MOS管Q1的栅极G连接，补偿端脚COMP通过电容C9接地、通过电容C5、电阻R10串联后接地，反馈端脚FB与变压电路的输出端连接，端脚UVLO通过电阻R4与输入滤波电路连接且通过电阻R5接地，端脚Isen通过电阻R3与MOS管Q1的源极S连接；其中，MOS管Q1的漏极D与变压电路连接，源极S通过电阻R11接地；所述反馈端脚FB通过电阻R12变压电路的输出端连接；其中，反馈端脚FB通过电阻R7、R8接地；电阻R12的输入端通过电容C19接地。
  3. 根据权利要求2所述的一种电源过滤转换器，其特征在于，所述变压电路包括变压线圈L1，其中，变压线圈L1包括初级线圈与次级线圈；所述初级线圈的输入端与输入滤波电路连接，输出端与MOS管Q1的漏极D连接；次级线圈一端接地，另一端与设有的输出滤波电路连接；所述初级线圈与MOS管Q1连接的一端、次级线圈与输出滤波连接的一端通过电容C3、电容C4连接，其中，电容C3、电容C4并联。
  4. 根据权利要求3所述的一种电源过滤转换器，其特征在于，所述次级线圈的输出端通过设有的二极管D1、线圈L2与输出滤波电路连接；其中，二极管D1输入端与次级线圈连接，并且二极管D1通过设有电阻R2、电容C17串联后并联；所述二极管D1与线圈L2之间滤波电路；所述滤波电路包括电容C20、电容C6、电容C8及电容C 14，且电容C20、电容C6、电容C8及电容C14一端与线圈L2入端连接，另一端接地。
  5. 根据权利要求4所述的一种电源过滤转换器，其特征在于，所述输出滤波电路包括电容C15、电容C7、电容C18及电阻R9；所述电容C15、电容C7、电容C18及电阻R9均一端与接口连接，另一端接地；所述输入滤波电路包括电容C1、电容C2、电容C16及电容C10，且电容C1、电容C2、电容C16及电容C10一端与电路输入端连接，另一端接地；所述输入滤波电路与输入接口连接。
  6. 根据权利要求1所述的一种电源过滤转换器，其特征在于，所述主控电路包括控制芯片U2，其型号为OC6801B/SOP8；所述控制芯片U2的端脚VDD、端脚EN通过电阻R4与输入滤波电路连接，且端脚VDD、端脚EN通过电容C10接地、通过二极管D6接地；所述二极管的输入端与地连接；端脚DRV通过电阻R9与设有的MOS管Q2的栅极G连接，端脚VCS通过电阻R10与MOS管Q2的源极S连接；端脚COMP与设有的反馈电路连接，且反馈电路与变压电路的输出端连接；所述MOS管Q2的源极S通过电阻R8接地。
  7. 根据权利要求6所述的一种电源过滤转换器，其特征在于，所述变压电路包括变压线圈L3；所述变压线圈L3包括一次绕组及二次绕组；所述一次绕组一端与输入滤波电路连接，另一端与MOS管Q2的漏极D连接；所述一次绕组的输入端与输出端之间连接有电阻R11、电容C8及二极管D8，其中，电阻R11与电阻C8并联后与二极管D8连接；所述二极管D8电流输入端与一次绕组的输出端连接；所述二次绕组的一端接地，另一端通过二极管D6、线圈L4与输出滤波电路连接；所述二极管D6并联有电容C14、电阻R6，且电容C14与电阻R6串联连接。
  8. 根据权利要求7所述的一种电源过滤转换器，其特征在于，所述线圈L4的输入端与电容C1、电容C5连接，输出端与电容C6、电容C16连接；其中，电容C1、电容C5、电容C6、电容C16另一端接地。
  9. 根据权利要求8所述的一种电源过滤转换器，其特征在于，所述输出滤波电路包括电阻R14、电容C15；所述电阻R14、电容C15连接在输出接口一端，且另一端接地；所述输出滤波电路与线圈L4之间还设有稳压电路；所述稳压电路包括三极管Q4、电阻R5及电容C9；所述三极管Q4的集电极与线圈L4的输出端连接，发射极与输出滤波电路连接，基极通过电阻R5与线圈的输出端连接，且通过电容C9接地。
  10. 根据权利要求9所述的一种电源过滤转换器，其特征在于，所述反馈电路包括隔离芯片IC1，其型号为EL3H7(C)(TA)-C；所述隔离芯片IC1的端脚4通过电阻R1与控制芯片U2端脚COMP连接，端脚3接地，端脚1通过电阻R13与线圈L4输出端连接，端脚2通过电阻R13与线圈L4的输出端连接，并且通过电阻R2及电阻R3接地；其中，端脚2通过电容C18接地，还有端脚2与稳压二极管U9连接，稳压二极管U9的型号为CJ431；稳压二极管U9的正极2接地，负极3与隔离芯片IC1的端脚2连接，控制极1通过电容C4与正极连接，并且正极1通过电容C3与电阻R16串联后与控制极1连接，控制极1与电阻R2及电阻R3之间的节点连接。
PCT/CN2019/112910 2019-05-13 2019-10-24 一种电源过滤转换器 WO2020228246A1 (zh)

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