CN111509825A - 45W broadband voltage adaptive PPS super fast charging mobile power structure - Google Patents

45W broadband voltage adaptive PPS super fast charging mobile power structure Download PDF

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CN111509825A
CN111509825A CN202010274827.7A CN202010274827A CN111509825A CN 111509825 A CN111509825 A CN 111509825A CN 202010274827 A CN202010274827 A CN 202010274827A CN 111509825 A CN111509825 A CN 111509825A
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resistor
capacitor
circuit
output
pin
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项子旋
周柏涛
李怀龙
黄振跃
李伊莎
张鑫涛
杨晓月
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Jiangsu University
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from AC mains by converters
    • H02J7/04Regulation of charging current or voltage
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/00047Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with provisions for charging different types of batteries
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007Regulation of charging or discharging current or voltage
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M1/00Details of apparatus for conversion
    • H02M1/14Arrangements for reducing ripples from DC input or output
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M1/00Details of apparatus for conversion
    • H02M1/32Means for protecting converters other than automatic disconnection
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M3/00Conversion of DC power input into DC power output
    • H02M3/22Conversion of DC power input into DC power output with intermediate conversion into AC
    • H02M3/24Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
    • H02M3/28Conversion 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

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  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)

Abstract

本发明公开了一种45W宽频带电压自适应PPS超级快充移动电源结构。该电路包括EMI抑制电路、整流滤波电路、钳位保护电路、主功率开关电路、高频变压器、次级EMI吸收电路、输出滤波反馈电路、光耦开关电路、三路电压转换模块、三路输出识别模块。本发明电路简单、体积小、成本低、安全可靠。作为基于PD3.0协议的新型快充电路,可自适应识别多种协议,进而实现所需的多种直流输出,兼容多种产品。能通过输出识别模块与用电设备实时通信,自适应改变输出的功率情况,既实现快速充电,又能最大情况延长用电设备的电池寿命。

Figure 202010274827

The invention discloses a 45W broadband voltage self-adaptive PPS super fast charging mobile power structure. The circuit includes EMI suppression circuit, rectification filter circuit, clamping protection circuit, main power switch circuit, high frequency transformer, secondary EMI absorption circuit, output filter feedback circuit, optocoupler switch circuit, three-way voltage conversion module, three-way output Identify the module. The invention has simple circuit, small volume, low cost, safety and reliability. As a new type of fast charging circuit based on the PD3.0 protocol, it can adaptively identify various protocols, thereby realizing various DC outputs required, and is compatible with various products. It can communicate with the electrical equipment in real time through the output identification module, and adaptively change the output power situation, which not only realizes fast charging, but also prolongs the battery life of the electrical equipment to the greatest extent.

Figure 202010274827

Description

45W宽频带电压自适应PPS超级快充移动电源结构45W broadband voltage adaptive PPS super fast charging mobile power structure

技术领域technical field

本发明涉及充电装置快速充电技术领域,特别提供了一种基于PD3.0协议的45W宽频带快充电源结构,可实现随负载类型不同的功率自适应充电电路。The invention relates to the technical field of fast charging of charging devices, and particularly provides a 45W broadband fast charging source structure based on the PD3.0 protocol, which can realize a power adaptive charging circuit with different load types.

背景技术Background technique

在当今这个信息化高速发展的社会,手机、平板等电子设备已经成为人们生活、日常办公不可或缺的工具,对其电能的快速补充也成为电子领域发展的一个技术焦点。目前,市场上现有的开关电源适配器一般都为5W/10W的小功率单一直流输出规格,一定程度上对用户在使用上产生了一些限制,如:效率低、不同产品的适配性等。2017年,USB-IF组织发布了USB PD 3.0的重要更新,正式推出旨在规范快充技术的PPS协议。虽然美国高通公司发布了最新的QC4+充电技术,但仍没有充电设备能够真正意义上地实现QC4+低压直充技术。此外,市面上的USBPD移动电源大多采用高度集成芯片的方案,尽管降低了成本,却难以实现40W、60W甚至100W的充电功率,也就不能满足笔记本电脑的快充需求。现有的开关电源还存在体积大、效率低、温度高等缺陷。In today's fast-developing information society, electronic devices such as mobile phones and tablets have become indispensable tools in people's life and daily office. At present, the existing switching power adapters on the market are generally 5W/10W low-power single DC output specifications, which impose some restrictions on the use of users to a certain extent, such as: low efficiency, adaptability of different products, etc. In 2017, the USB-IF organization released an important update of USB PD 3.0 and officially launched the PPS protocol designed to standardize fast charging technology. Although Qualcomm has released the latest QC4+ charging technology, there is still no charging device that can truly realize the QC4+ low-voltage direct charging technology. In addition, most of the USBPD mobile power supplies on the market use highly integrated chip solutions. Although the cost is reduced, it is difficult to achieve 40W, 60W or even 100W of charging power, and it cannot meet the fast charging needs of notebook computers. The existing switching power supply also has the defects of large volume, low efficiency and high temperature.

发明内容SUMMARY OF THE INVENTION

本发明旨在解决上述问题,而提供一种最大支持45w的、具有高能效的、能够支持多种快充协议的电源结构。可实现高功率宽频带电能输出,并根据负载类型的变化做到电压自适应,从而输出不同类型电能的电路,以达到快速充电的目的。The present invention aims to solve the above problems, and provides a power supply structure that supports a maximum of 45w, has high energy efficiency, and can support multiple fast charging protocols. It can realize high-power broadband power output, and achieve voltage self-adaptation according to the change of load type, so as to output different types of power circuits to achieve the purpose of fast charging.

为实现上述目的,本发明技术采用以下技术方案实现。In order to achieve the above object, the technology of the present invention adopts the following technical solutions to achieve.

一种45W宽频带电压自适应PPS超级快充移动电源结构,该电源结构包括电源输入模块、反激式电路模块、快充电压转换模块、快充识别模块,其中电源输入模块、反激式电路模块、快充电压转换模块、快充识别模块依次连接;电源输入模块连接外部220V交流电,快充识别模块与外部的终端使用设备连接;A 45W broadband voltage adaptive PPS super fast charging mobile power structure, the power structure includes a power input module, a flyback circuit module, a fast charge voltage conversion module, and a fast charge identification module, wherein the power input module, the flyback circuit The module, the fast charging voltage conversion module, and the fast charging identification module are connected in sequence; the power input module is connected to the external 220V AC power, and the fast charging identification module is connected to the external terminal equipment;

所述电源输入模块包括相连接的输入端EMI抑制电路和整流滤波模块;The power input module includes a connected input end EMI suppression circuit and a rectification filter module;

所述反激式电路模块包括依次串联的反激式主电路、主功率开关电路、输出电压反馈回路;然后输出电压反馈回路再将电压反馈给反激式主电路;The flyback circuit module includes a flyback main circuit, a main power switch circuit, and an output voltage feedback loop in series in sequence; then the output voltage feedback loop feeds back the voltage to the flyback main circuit;

所述快充识别模块包括相并联的USBA口第一输出电路、USBA口第二输出电路、TYPE-C口快充识别输出电路。The fast charging identification module includes a first output circuit of the USBA port, a second output circuit of the USBA port, and a fast charging identification output circuit of the TYPE-C port, which are connected in parallel.

优选的,所述电源输入模块包括输入接口P1、共模电感L2、熔断器FU1、电阻R18、电阻R19、热敏电阻RT1、电容C10、滤波电容C11、滤波电容C12以及整流桥D6;熔断器FU1一端连接输入接口P1正极,熔断器FU1另一端连接共模电感L2的2号脚;热敏电阻RT1一端连接输入接口P1负极,热敏电阻RT1另一端连接共模电感L2的4号脚;电阻R18、电阻R19串联后并联在共模电感L2输入端;电容C10并联在共模电感L2输入端;共模电感L2输出端连接整流桥电路D6的输入端;滤波电容C11、滤波电容C12并联于D6的输出端。Preferably, the power input module includes an input interface P1, a common mode inductor L2, a fuse FU1, a resistor R18, a resistor R19, a thermistor RT1, a capacitor C10, a filter capacitor C11, a filter capacitor C12 and a rectifier bridge D6; the fuse One end of FU1 is connected to the positive pole of the input interface P1, the other end of the fuse FU1 is connected to the No. 2 pin of the common mode inductor L2; one end of the thermistor RT1 is connected to the negative pole of the input interface P1, and the other end of the thermistor RT1 is connected to the No. 4 pin of the common mode inductor L2; Resistor R18 and resistor R19 are connected in series to the input end of common mode inductor L2; capacitor C10 is connected in parallel to the input end of common mode inductor L2; the output end of common mode inductor L2 is connected to the input end of rectifier bridge circuit D6; filter capacitor C11 and filter capacitor C12 are connected in parallel at the output of D6.

上述输入接口P1、共模电感L2、熔断器FU1、电阻R18、电阻R19、热敏电阻RT1、电容C10构成EMI抑制电路;滤波电容C11、滤波电容C12以及整流桥D6构成整流滤波模块。The above input interface P1, common mode inductor L2, fuse FU1, resistor R18, resistor R19, thermistor RT1, and capacitor C10 form an EMI suppression circuit; filter capacitor C11, filter capacitor C12 and rectifier bridge D6 form a rectifier filter module.

优选的,所述主功率开关电路包括离线式开关芯片U2、变压器TR1、光电耦合器U1、电阻R2至R11、电容C5至C9、二极管D2至D4;Preferably, the main power switch circuit includes an off-line switch chip U2, a transformer TR1, a photocoupler U1, resistors R2 to R11, capacitors C5 to C9, and diodes D2 to D4;

电阻R8、电阻R9串联后一端与整流桥D6正极相连,电阻R8、电阻R9串联后另一端接开关芯片U2的电压检测引脚;电阻R2、电阻R3、电容C5、二极管D2依次并联,然后串联电阻R4、二极管D4,共同构成钳位保护电路,钳位保护电路一端与整流桥D6正极相连,钳位保护电路另一端接开关芯片U2的漏极引脚;开关芯片U2的频率引脚与源极引脚相连;开关芯片U2的外部流限引脚经过电阻R10与源极相连;电阻R6、电阻R7串联后一端接整流桥D6输出端,电阻R6、电阻R7串联后另一端与开关芯片U2的外部流限引脚相连;电阻R11与电容C8串联后并联电容C7,然后并联在开关芯片U2的控制引脚与频率引脚之间;二级管D3、电阻R5、电容C6构成吸收回路,吸收回路一端连接变压器TR1,吸收回路另一端作为偏置绕组的输出端;电容C9并联在变压器偏置绕组两端;光电耦合器U1的集电极连接二级管D3的阴极,光电耦合器U1的发射极连接开关芯片U2的控制引脚。After the resistor R8 and the resistor R9 are connected in series, one end is connected to the positive pole of the rectifier bridge D6. After the resistor R8 and the resistor R9 are connected in series, the other end is connected to the voltage detection pin of the switch chip U2; the resistor R2, the resistor R3, the capacitor C5, and the diode D2 are connected in series in order Resistor R4 and diode D4 together form a clamping protection circuit. One end of the clamping protection circuit is connected to the positive pole of the rectifier bridge D6, and the other end of the clamping protection circuit is connected to the drain pin of the switch chip U2; the frequency pin of the switch chip U2 is connected to the source The pole pin is connected; the external current limit pin of the switch chip U2 is connected to the source through the resistor R10; after the resistor R6 and the resistor R7 are connected in series, one end is connected to the output end of the rectifier bridge D6, and the other end is connected to the switch chip U2 after the resistor R6 and the resistor R7 are connected in series. The external current limit pin is connected to the external current limit pin; resistor R11 is connected in series with capacitor C8, then capacitor C7 is connected in parallel, and then connected in parallel between the control pin and frequency pin of switch chip U2; diode D3, resistor R5 and capacitor C6 form an absorption loop, One end of the absorption loop is connected to the transformer TR1, and the other end of the absorption loop is used as the output end of the bias winding; the capacitor C9 is connected in parallel with both ends of the bias winding of the transformer; the collector of the photocoupler U1 is connected to the cathode of the diode D3, and the The emitter is connected to the control pin of the switch chip U2.

优选的,所述反激式主电路包括离线式开关芯片U2、变压器TR1、电阻R1、电阻R15、电容C1至C4,C13及C14、电感L1、二级管D1、发光二级管D5、输出端子P2、P3,电感L1、电容C13、电容C14组成π型滤波电路;电阻R1与电容C2串联后并联二级管D1,构成吸收回路,吸收回路一端连接变压器TR1,吸收回路另一端经π型滤波电路与输出端子P2、P3相连;电容C4、电容C3并联在变压器二次侧两端;电阻R15与发光二级管D5串联后一端与输出电压正极相连,另一端接地,构成电压输出指示灯。Preferably, the flyback main circuit includes an off-line switch chip U2, a transformer TR1, a resistor R1, a resistor R15, capacitors C1 to C4, C13 and C14, an inductor L1, a diode D1, a light-emitting diode D5, an output Terminals P2, P3, inductor L1, capacitor C13, and capacitor C14 form a π-type filter circuit; resistor R1 and capacitor C2 are connected in series and then diode D1 is connected in parallel to form an absorption loop. One end of the absorption loop is connected to the transformer TR1, and the other end of the absorption loop is connected to the The filter circuit is connected with the output terminals P2 and P3; the capacitor C4 and the capacitor C3 are connected in parallel at both ends of the secondary side of the transformer; the resistor R15 is connected in series with the light-emitting diode D5, and one end is connected to the positive pole of the output voltage, and the other end is grounded to form a voltage output indicator light .

优选的,所述输出电压反馈回路包括电阻R12、电阻R13、电阻R14、电阻R16、电阻R17、电容C15、C16、稳压基准源Q1、光电耦合器U1;Preferably, the output voltage feedback loop includes a resistor R12, a resistor R13, a resistor R14, a resistor R16, a resistor R17, capacitors C15, C16, a voltage regulator reference source Q1, and a photocoupler U1;

电阻R16、R17串联后并联在输出端;电阻R17一端接稳压基准源Q1的参考端,电阻R17另一端接Q1的阳极;电容C15并联在稳压基准源Q1的阴极与参考端之间;电阻R12与电容C16串联后与电阻R13并联,其一端接在光电耦合器U1的阳极,其另一端接入变压器二次侧;电阻R14并联在光电耦合器U1的阴极与阳极之间、稳压基准源Q1的阴极与光电耦合器U1的阴极相连。Resistors R16 and R17 are connected in series and connected to the output terminal in parallel; one end of the resistor R17 is connected to the reference terminal of the voltage stabilized reference source Q1, and the other end of the resistor R17 is connected to the anode of Q1; the capacitor C15 is connected in parallel between the cathode of the voltage stabilized reference source Q1 and the reference terminal; The resistor R12 is connected in series with the capacitor C16 and then connected in parallel with the resistor R13, one end of which is connected to the anode of the photocoupler U1, and the other end is connected to the secondary side of the transformer; the resistor R14 is connected in parallel between the cathode and the anode of the photocoupler U1, and the voltage is stabilized. The cathode of the reference source Q1 is connected to the cathode of the optocoupler U1.

优选的,所述快充电压转换模块包括同步开关降压转换芯片U1、电感L1、电阻R1、电阻R3、电容C1至电容C14;Preferably, the fast-charging voltage conversion module includes a synchronous switch step-down conversion chip U1, an inductor L1, a resistor R1, a resistor R3, and a capacitor C1 to a capacitor C14;

输入电压经电容C11至C14滤波后接到降压转换U1的输入端;电阻R3一端接降压转换U1的频率调节引脚,另一端接地;电容C3一端接芯片U1的自举电容引脚,另一端接芯片的开关节点;电感L1一端连接降压转换U1的开关节点,另一端经过电容C3、电容C4、电容C6、电容C7滤波后连接到芯片的输出限流检测引脚;降压转换芯片U1的输出引脚经过电阻R1连接到电流检测引脚。The input voltage is filtered by capacitors C11 to C14 and then connected to the input terminal of step-down converter U1; one end of resistor R3 is connected to the frequency adjustment pin of step-down converter U1, and the other end is grounded; one end of capacitor C3 is connected to the bootstrap capacitor pin of chip U1, The other end is connected to the switching node of the chip; one end of the inductor L1 is connected to the switching node of the step-down conversion U1, and the other end is connected to the output current limit detection pin of the chip after being filtered by capacitor C3, capacitor C4, capacitor C6 and capacitor C7; step-down conversion The output pin of the chip U1 is connected to the current detection pin through the resistor R1.

优选的,所述USBA口第一输出电路、USBA口第二输出电路相同,包括同步开关降压转换芯片U1、USB接口Y1、电阻R2、电容C15至C18,降压转换芯片U1的快充识别信号引脚DM、DP分别经过电容C17、C18滤波后与USB接口Y1相接;电阻R2作为放电电阻,一端接地,另一端接降压转换芯片U1的电压输出引脚;降压转换芯片U1输出引脚经过滤波电容C15和C16与USB接口Y1的VCC端相连。Preferably, the first output circuit of the USBA port and the second output circuit of the USBA port are the same, including the synchronous switch step-down conversion chip U1, the USB interface Y1, the resistor R2, the capacitors C15 to C18, and the fast-charge identification of the step-down conversion chip U1. The signal pins DM and DP are respectively filtered by capacitors C17 and C18 and then connected to the USB interface Y1; the resistor R2 is used as a discharge resistor, one end is grounded, and the other end is connected to the voltage output pin of the step-down conversion chip U1; the step-down conversion chip U1 outputs The pin is connected to the VCC terminal of the USB interface Y1 through filter capacitors C15 and C16.

优选的,所述TYPE-C口快充识别输出电路包括同步开关降压转换芯片U1、TYPE-C接口Y2、电容C15、C16、电阻R2;电阻R2一端接地,另一端接芯片U1的电压输出引脚;芯片U1输出引脚经过滤波电容C15、C16与TYPE-C接口Y2的供电引脚VBUS相连;芯片U1的DM引脚与接口Y2的数据引脚DN1、DN2相连;芯片U1的DP引脚与接口Y2数据引脚DP1、DP2相连;芯片U1检测引脚CC1、CC2分别接入TYPE-C接口对应引脚。Preferably, the TYPE-C port fast charging identification output circuit includes a synchronous switch step-down conversion chip U1, a TYPE-C interface Y2, capacitors C15, C16, and a resistor R2; one end of the resistor R2 is grounded, and the other end is connected to the voltage output of the chip U1 pin; the output pin of chip U1 is connected to the power supply pin VBUS of TYPE-C interface Y2 through filter capacitors C15 and C16; the DM pin of chip U1 is connected to the data pin DN1 and DN2 of interface Y2; the DP pin of chip U1 is connected. The pins are connected to the data pins DP1 and DP2 of the interface Y2; the detection pins CC1 and CC2 of the chip U1 are respectively connected to the corresponding pins of the TYPE-C interface.

本发明的有益效果为:采用高频开关技术,使电路结构做到小型化、轻量化;双USB接口以及Type-C接口输出,可同时对多个终端设备进行充电;支持多种快充协议,可自动识别终端设备来调节输出电压电流,延长电池使用寿命;支持USBPD协议,可对外输出5V/3A、7V/2.5A、9V/2A、12V/2A、15V/2.3A、20V/2.3A;电能转换效率高达85%,实现高效节能充电;实现45W宽频带大功率输出,可对大容量终端设备充电。The beneficial effects of the present invention are as follows: the high-frequency switching technology is adopted to make the circuit structure miniaturized and light in weight; dual USB interface and Type-C interface output can simultaneously charge multiple terminal devices; support a variety of fast charging protocols , can automatically identify the terminal equipment to adjust the output voltage and current, prolong battery life; support USBPD protocol, can output 5V/3A, 7V/2.5A, 9V/2A, 12V/2A, 15V/2.3A, 20V/2.3A ; The power conversion efficiency is as high as 85%, realizing high-efficiency and energy-saving charging; realizing 45W broadband high-power output, which can charge large-capacity terminal equipment.

附图说明Description of drawings

图1是本发明一种反激式电路实施例的原理图。FIG. 1 is a schematic diagram of an embodiment of a flyback circuit of the present invention.

图2是本发明可实现宽频带高功率快充电路的实施例原理框图。FIG. 2 is a schematic block diagram of an embodiment of the present invention that can realize a broadband high-power fast charging circuit.

图3是本发明一种USBA口快充输出的实施例原理图。FIG. 3 is a schematic diagram of an embodiment of a USB A port fast charging output according to the present invention.

图4是本发明一种Type-C口快充输出的实施例原理图。FIG. 4 is a schematic diagram of an embodiment of a Type-C port fast charge output of the present invention.

具体实施方式Detailed ways

下列实施例是对本发明的进一步解释和补充,对本发明不构成任何限制。The following examples are further explanations and supplements to the present invention, and do not constitute any limitation to the present invention.

参见图1,本实施例是一种基于PD3.0协议的45W宽频带,可实现电压自适应的PPS超级快充电源结构,包括电源输入模块、反激式电路模块、快充电压转换模块、输出快充识别模块,所述反激式电路模块、快充电压转换模块、快充识别模块依次连接,电源输入模块连接充电器,快充识别电路与外部的终端使用设备连接。Referring to FIG. 1, this embodiment is a 45W broadband power source structure based on PD3.0 protocol, which can realize voltage adaptive PPS super fast charging source structure, including power input module, flyback circuit module, fast charging voltage conversion module, A fast charging identification module is output, the flyback circuit module, the fast charging voltage conversion module, and the fast charging identification module are connected in sequence, the power input module is connected to the charger, and the fast charging identification circuit is connected to the external terminal equipment.

其中电源输入模块包括输入端EMI抑制电路11、整流滤波模块12、连接在整流滤波模块输出端的钳位保护电路13;反激式电路模块包括反激式主电路、主功率开关电路14、次级EMI吸收电路16、辅助绕组滤波电路17、输出滤波电路18、输出电压反馈电路20、光耦开关电路21,其中辅助绕组滤波电路17、光耦开关电路21、主功率开关电路14依次连接,输出反馈电路20控制光耦开关的通断;输出快充识别模块包括USBA口第一输出电路25、USBA口第二输出电路26、TYPE-C口快充识别输出电路27,分别与电压转换模块A22、电压转换模块B23、电压转换模块C24相连。The power input module includes an input end EMI suppression circuit 11, a rectifier filter module 12, and a clamp protection circuit 13 connected to the output end of the rectifier filter module; the flyback circuit module includes a flyback main circuit, a main power switch circuit 14, a secondary The EMI absorption circuit 16, the auxiliary winding filter circuit 17, the output filter circuit 18, the output voltage feedback circuit 20, and the optocoupler switch circuit 21, wherein the auxiliary winding filter circuit 17, the optocoupler switch circuit 21, and the main power switch circuit 14 are connected in sequence, and the output The feedback circuit 20 controls the on-off of the optocoupler switch; the output fast charging identification module includes the first output circuit 25 of the USBA port, the second output circuit 26 of the USBA port, and the fast charging identification output circuit 27 of the TYPE-C port, which are respectively connected with the voltage conversion module A22. , the voltage conversion module B23 and the voltage conversion module C24 are connected.

具体的,电源输入模块包括输入接口P1、共模电感L2、熔断器FU1、电阻R18、电阻R19、热敏电阻RT1、电容C10至C12以及整流桥D6,电路中串联共模电感可有效抑制共模电流;熔断器FU1一端连接输入接口P1正极,另一端连接共模电感L2的2号脚,熔断器熔断电流采用1.25A,来保护电路;在输入接口与共模电感之间串联负温度系数的热敏电阻RT1,可有效抑制开机时产生的浪涌电流;电阻R18、R19并联在共模电感L2输入端,形成滤波放电电路,并分散所承受的功率;电容C10并联在共模电感L2输入端,以此滤除差模干扰;共模电感L2输出端连接整流桥电路D6的输入端;滤波电容C11、C12并联于D6的输出端。Specifically, the power input module includes an input interface P1, a common mode inductor L2, a fuse FU1, a resistor R18, a resistor R19, a thermistor RT1, capacitors C10 to C12, and a rectifier bridge D6. The series common mode inductor in the circuit can effectively suppress common Mode current; one end of the fuse FU1 is connected to the positive pole of the input interface P1, and the other end is connected to the No. 2 pin of the common mode inductor L2. The fuse current is 1.25A to protect the circuit; a negative temperature coefficient is connected in series between the input interface and the common mode inductor. Thermistor RT1 can effectively suppress the surge current generated when starting up; resistors R18 and R19 are connected in parallel with the input end of the common-mode inductor L2 to form a filter discharge circuit and disperse the power it is subjected to; capacitor C10 is connected in parallel with the input of the common-mode inductor L2 terminal to filter out differential mode interference; the output terminal of the common mode inductor L2 is connected to the input terminal of the rectifier bridge circuit D6; the filter capacitors C11 and C12 are connected in parallel to the output terminal of D6.

反激式主电路包括离线式开关芯片U2、变压器TR1、电阻R1、电阻R15、电容C1至C4,C13及C14、电感L1、二级管D1、发光二级管D5、输出端子P2、P3,电感L1、电容C13、C14组成π型LC滤波电路,来降低输出的纹波电压;二级管D1、电阻R1与电容C2构成吸收回路一端连接变压器9号脚,另一端经π型滤波电路与输出端子相连,其中二极管可保证电能的单向流通,RC阻容串联后可抑制反向峰值电压对二极管的影响;滤波电容C4、C5并联在变压器二次侧两端;电阻R15与发光二级管D5串联后一端与输出电压正极相连,另一端接地,来指示反激电路工作。The flyback main circuit includes off-line switch chip U2, transformer TR1, resistor R1, resistor R15, capacitors C1 to C4, C13 and C14, inductor L1, diode D1, light-emitting diode D5, output terminals P2, P3, Inductor L1, capacitors C13 and C14 form a π-type LC filter circuit to reduce the output ripple voltage; diode D1, resistor R1 and capacitor C2 form an absorption loop. The output terminals are connected, in which the diode can ensure the unidirectional flow of electric energy, and the RC resistor-capacitor in series can suppress the influence of the reverse peak voltage on the diode; the filter capacitors C4 and C5 are connected in parallel at both ends of the secondary side of the transformer; the resistor R15 is connected to the light-emitting secondary After the tube D5 is connected in series, one end is connected to the positive pole of the output voltage, and the other end is grounded to indicate the operation of the flyback circuit.

主功率开关电路包括离线式开关芯片U2、变压器TR1、光电耦合器U1、电阻R2至R11、电容C5至C9、二极管D2至D4,电阻R8、R9串联后一端与整流桥正极相连,另一端接开关芯片U2的电压检测引脚;电阻R2至R4、电容C3、二极管D2、D4共同构成钳位保护电路,一端与整流桥正极相连,另一端接开关芯片U2的漏极引脚,该电路可降低漏感引起的峰值漏极电压尖峰,可提高轻载效率和空载输入功率;芯片U2的频率引脚直接与源极引脚相连,配置芯片的开关频率为132kHz,来减小变压器以及电源的尺寸,并使得EMI频率低于150kHz;芯片U2的外部流限引脚经过电阻R10与源极相连;电阻R6、R7串联后一端接整流桥输出端,另一端与芯片的外部流限引脚相连,使得流限随输入电压的降低而降低;电阻R11与电容C8串联后并联在芯片U2的控制引脚与频率引脚;二级管D3、电阻R5、电容C6构成吸收回路,一端连接变压器5号引脚,另一端作为偏置绕组的输出端,其中二极管可保证电能的单向流通,RC阻容串联后可抑制反向峰值电压对二极管的影响;电容C9并联在变压器偏置绕组两端,对输出电压进行滤波;光电耦合器U1的集电极连接二级管D3的阴极,发射极连接开关芯片U2的控制引脚。The main power switch circuit includes an off-line switch chip U2, a transformer TR1, a photocoupler U1, resistors R2 to R11, capacitors C5 to C9, and diodes D2 to D4. After the resistors R8 and R9 are connected in series, one end is connected to the positive electrode of the rectifier bridge, and the other end is connected to the positive electrode of the rectifier bridge. The voltage detection pin of switch chip U2; resistors R2 to R4, capacitor C3, diodes D2, D4 together form a clamping protection circuit, one end is connected to the positive pole of the rectifier bridge, and the other end is connected to the drain pin of the switch chip U2, the circuit can be Reducing the peak drain voltage spike caused by leakage inductance can improve the light-load efficiency and no-load input power; the frequency pin of the chip U2 is directly connected to the source pin, and the switching frequency of the configuration chip is 132kHz to reduce the transformer and power supply. The size of the EMI frequency is lower than 150kHz; the external current limit pin of the chip U2 is connected to the source through the resistor R10; the resistor R6 and R7 are connected in series, and one end is connected to the output end of the rectifier bridge, and the other end is connected to the external current limit pin of the chip connected to make the current limit decrease with the decrease of the input voltage; resistor R11 and capacitor C8 are connected in series with the control pin and frequency pin of chip U2 in parallel; diode D3, resistor R5 and capacitor C6 form an absorption loop, and one end is connected to the transformer No. 5 pin, the other end is used as the output end of the bias winding, in which the diode can ensure the unidirectional flow of electric energy, and the RC resistor-capacitor in series can suppress the influence of the reverse peak voltage on the diode; the capacitor C9 is connected in parallel with the two bias windings of the transformer. terminal to filter the output voltage; the collector of the photocoupler U1 is connected to the cathode of the diode D3, and the emitter is connected to the control pin of the switch chip U2.

输出电压反馈回路包括电阻R12至R17、电容C15、C16、稳压基准源Q1、光电耦合器U1,电阻R17一端接稳压基准源Q1的参考端,另一端接Q1的阳极;电容C15并联在稳压基准源Q1的阴极与参考端之间;电阻R12与电容C16串联后与电阻R13并联,一端接在光电耦合器U1的阳极,另一端接入变压器二次侧;电阻R14并联在光电耦合器U1的阴极与阳极之间、稳压基准源Q1的阴极与光电耦合器U1的阴极相连;电阻R16、R17串联后并联在输出端,来对输出端进行分压,后经过稳压基准源Q1将误差放大,进而控制Q1从阴极到阳极的分流;当输出电压增大时,使得Q1的分流电流增大,光耦发光增强,离线式开关芯片U2接收到的反馈电压也就越强,芯片U2将会调整内部MOSFET的开关时间,使得输出电压回路;由于平衡时,Q1的Vref=2.5V,因此,当R16=71.5kohm,R17=10.2kohm时,输出端电压为The output voltage feedback loop includes resistors R12 to R17, capacitors C15, C16, voltage regulator reference source Q1, and optocoupler U1. One end of resistor R17 is connected to the reference terminal of voltage regulator reference source Q1, and the other end is connected to the anode of Q1; capacitor C15 is connected in parallel with Between the cathode of the voltage-stabilized reference source Q1 and the reference terminal; the resistor R12 is connected in series with the capacitor C16 and then connected in parallel with the resistor R13, one end is connected to the anode of the photocoupler U1, and the other end is connected to the secondary side of the transformer; the resistor R14 is connected in parallel with the photoelectric coupling Between the cathode and the anode of the device U1, the cathode of the voltage stabilized reference source Q1 is connected to the cathode of the photocoupler U1; the resistors R16 and R17 are connected in series and connected in parallel at the output end to divide the output end, and then pass through the voltage stabilized reference source. Q1 amplifies the error, and then controls the shunt of Q1 from the cathode to the anode; when the output voltage increases, the shunt current of Q1 increases, the optocoupler luminescence is enhanced, and the feedback voltage received by the off-line switch chip U2 is stronger, The chip U2 will adjust the switching time of the internal MOSFET to make the output voltage loop; due to the balance, the Vref of Q1=2.5V, therefore, when R16=71.5kohm, R17=10.2kohm, the output terminal voltage is

Figure BDA0002444399650000071
Figure BDA0002444399650000071

快充电压转换模块包括同步开关降压转换芯片U1、电感L1、电阻R1、电阻R3、电容C1至电容C14,输入电压经电容C11至C14滤波后接到芯片U1的输入端;电阻R3一端接芯片U1的频率调节引脚,另一端接地,选取R3为75kohm,调节芯片频率为220kHz;电容C3一端接芯片U1的自举电容引脚,另一端接芯片的开关节点,电容取值0.1uF,为上管栅极驱动提供电压;电感L1一端连接芯片U1的开关节点,另一端经过电容C3至C7滤波后连接到芯片的输出限流检测引脚;降压转换芯片U1的输出引脚经过电阻R1连接到电流检测引脚,R1选取20mohm,通过检测输出限流检测引脚与电压输出引脚之间的电压差,判断当前负载电流大小是否到设定电流大小,进而实现输出限流保护。The fast charging voltage conversion module includes a synchronous switch step-down conversion chip U1, an inductor L1, a resistor R1, a resistor R3, and a capacitor C1 to a capacitor C14. The input voltage is filtered by the capacitors C11 to C14 and then connected to the input end of the chip U1; one end of the resistor R3 is connected to The frequency adjustment pin of chip U1, the other end is grounded, select R3 to be 75kohm, and adjust the chip frequency to 220kHz; one end of capacitor C3 is connected to the bootstrap capacitor pin of chip U1, and the other end is connected to the switch node of the chip, and the value of the capacitor is 0.1uF, Provide voltage for the gate drive of the upper tube; one end of the inductor L1 is connected to the switching node of the chip U1, and the other end is connected to the output current limit detection pin of the chip after being filtered by the capacitors C3 to C7; the output pin of the step-down conversion chip U1 passes through the resistor. R1 is connected to the current detection pin, and R1 is selected as 20mohm. By detecting the voltage difference between the output current limit detection pin and the voltage output pin, it is judged whether the current load current size reaches the set current size, and then the output current limit protection is realized.

USBA口输出电路包括同步开关降压转换芯片U1、USB接口Y1、电阻R2、电容C15至C18,降压转换芯片U1的快充识别信号引脚DM、DP分别经过电容C17、C18滤波后与USB接口Y1相接;电阻R2作为放电电阻,一端接地,另一端接芯片U1的电压输出引脚;芯片输出引脚经过滤波电容C15和C16与USB接口Y1的VCC端相连;USB接口Y1与终端使用设备相连,支持USBPD协议。The USBA port output circuit includes a synchronous switch step-down conversion chip U1, USB interface Y1, resistor R2, and capacitors C15 to C18. The fast-charge identification signal pins DM and DP of the step-down conversion chip U1 are filtered by capacitors C17 and C18 respectively. The interface Y1 is connected; the resistor R2 is used as a discharge resistor, one end is grounded, and the other end is connected to the voltage output pin of the chip U1; the chip output pin is connected to the VCC end of the USB interface Y1 through the filter capacitors C15 and C16; the USB interface Y1 is used with the terminal The device is connected and supports the USBPD protocol.

TYPE-C口快充识别输出电路包括同步开关降压转换芯片U1、TYPE-C接口Y2、电容C15、C16以及电阻R2;电阻R2作为放电电阻,一端接地,另一端接芯片U1的电压输出引脚;芯片输出引脚经过滤波电容C15和C16与TYPE-C接口Y2的供电引脚VBUS相连;降压转换芯片U1的USB快充识别信号DM与TYPE-C接口Y2的数据引脚DN1、DN2相连;而USB快充识别信号DP与Y2数据引脚DP1、DP2相连;芯片U1的Type-C检测引脚CC1、CC2分别接入TYPE-C接口对应引脚用于系统配置;TYPE-C接口Y2与终端使用设备相连,可以通过DM/DP和CC1/CC2支持多种快充协议,当Type-C输出5V时,可以接收其他快充协议,并按照新接收的快充协议改变电压和电流,而当Type-C输出不是5V时,则自动屏蔽其他快充协议。TYPE-C port fast charging identification output circuit includes synchronous switch step-down conversion chip U1, TYPE-C interface Y2, capacitors C15, C16 and resistor R2; resistor R2 is used as a discharge resistor, one end is grounded, and the other end is connected to the voltage output lead of chip U1. pin; the output pin of the chip is connected to the power supply pin VBUS of the TYPE-C interface Y2 through the filter capacitors C15 and C16; the USB fast charging identification signal DM of the step-down conversion chip U1 and the data pins DN1 and DN2 of the TYPE-C interface Y2 The USB fast charging identification signal DP is connected to the Y2 data pins DP1 and DP2; the Type-C detection pins CC1 and CC2 of the chip U1 are respectively connected to the corresponding pins of the TYPE-C interface for system configuration; the TYPE-C interface Y2 is connected to the terminal equipment, and can support multiple fast charging protocols through DM/DP and CC1/CC2. When Type-C outputs 5V, it can receive other fast charging protocols, and change the voltage and current according to the newly received fast charging protocol. , and when the Type-C output is not 5V, other fast charging protocols are automatically shielded.

本发明未尽事宜为公知技术。Matters not addressed in the present invention are known in the art.

在本说明书的描述中,参考术语“一个实施例”、“一些实施例”、“示意性实施例”、“示例”、“具体示例”、或“一些示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本发明的至少一个实施例或示例中。在本说明书中,对上述术语的示意性表述不一定指的是相同的实施例或示例。而且,描述的具体特征、结构、材料或者特点可以在任何的一个或多个实施例或示例中以合适的方式结合。In the description of this specification, reference to the terms "one embodiment," "some embodiments," "exemplary embodiment," "example," "specific example," or "some examples", etc., is meant to incorporate the embodiments A particular feature, structure, material, or characteristic described by an example or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

尽管已经示出和描述了本发明的实施例,本领域的普通技术人员可以理解:在不脱离本发明的原理和宗旨的情况下可以对这些实施例进行多种变化、修改、替换和变型,本发明的范围由权利要求及其等同物限定。Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, The scope of the invention is defined by the claims and their equivalents.

Claims (8)

1. A45W broadband voltage self-adaptive PPS super fast charging mobile power supply structure is characterized by comprising a power supply input module, a flyback circuit module, a fast charging voltage conversion module and a fast charging identification module, wherein the power supply input module, the flyback circuit module, the fast charging voltage conversion module and the fast charging identification module are sequentially connected; the power input module is connected with external 220V alternating current, and the quick charge identification module is connected with external terminal use equipment;
the power input module comprises an input end EMI suppression circuit and a rectification filter module which are connected;
the flyback circuit module comprises a flyback main circuit, a main power switch circuit and an output voltage feedback loop which are sequentially connected in series; then the output voltage feedback loop feeds the voltage back to the flyback main circuit;
the quick charging identification module comprises a first output circuit of a USBA port, a second output circuit of the USBA port and a quick charging identification output circuit of a TYPE-C port which are connected in parallel.
2. The power supply structure of claim 1, wherein the power input module comprises an input interface P1, a common-mode inductor L, a fuse FU1, a resistor R18, a resistor R19, a thermistor RT1, a capacitor C10, a filter capacitor C11, a filter capacitor C12 and a rectifier bridge D6, one end of the fuse FU1 is connected with the positive electrode of an input interface P1, the other end of the fuse FU1 is connected with the pin 2 of the common-mode inductor L, one end of the thermistor RT1 is connected with the negative electrode of the input interface P1, the other end of the thermistor RT1 is connected with the pin 4 of the common-mode inductor 1, the resistor R1 and the resistor R1 are connected in series and then connected in parallel with the input end of the common-mode inductor 1, the capacitor C1 is connected in parallel with the input end of the common-mode inductor 1, the output end of the common-mode inductor 1 is connected with the input end of the rectifier bridge circuit D36.
The input interface P1, the common mode inductor L2, the fuse FU1, the resistor R18, the resistor R19, the thermistor RT1 and the capacitor C10 form an EMI suppression circuit, and the filter capacitor C11, the filter capacitor C12 and the rectifier bridge D6 form a rectifier and filter module.
3. The power supply structure according to claim 2, characterized in that: the main power switch circuit comprises an off-line switch chip U2, a transformer TR1, a photoelectric coupler U1, resistors R2-R11, capacitors C5-C9 and diodes D2-D4;
one end of the resistor R8 and the resistor R9 are connected in series and then connected with the anode of the rectifier bridge D6, and the other end of the resistor R8 and the resistor R9 are connected in series and then connected with a voltage detection pin of the switch chip U2; the resistor R2, the resistor R3, the capacitor C5 and the diode D2 are sequentially connected in parallel, and then are connected in series with the resistor R4 and the diode D4 to form a clamping protection circuit, one end of the clamping protection circuit is connected with the anode of the rectifier bridge D6, and the other end of the clamping protection circuit is connected with a drain electrode pin of the switch chip U2; a frequency pin of the switch chip U2 is connected with a source electrode pin; an external current limiting pin of the switch chip U2 is connected with a source electrode through a resistor R10; one end of the resistor R6 and the resistor R7 are connected in series and then connected with the output end of the rectifier bridge D6, and the other end of the resistor R6 and the resistor R7 are connected in series and then connected with the external current limit pin of the switch chip U2; the resistor R11 is connected with the capacitor C8 in series and then connected with the capacitor C7 in parallel, and then connected between the control pin and the frequency pin of the switch chip U2 in parallel; an absorption loop is formed by the diode D3, the resistor R5 and the capacitor C6, one end of the absorption loop is connected with the transformer TR1, and the other end of the absorption loop is used as the output end of the bias winding; the capacitor C9 is connected in parallel to two ends of the bias winding of the transformer; the collector of the photoelectric coupler U1 is connected with the cathode of the diode D3, and the emitter of the photoelectric coupler U1 is connected with the control pin of the switch chip U2.
4. The power supply structure of claim 1, wherein the flyback main circuit comprises an off-line switch chip U2, a transformer TR1, a resistor R1, a resistor R15, capacitors C1 to C4, C13 and C14, an inductor L1, a diode D1, a light emitting diode D5, output terminals P2 and P3, the inductor L1, the capacitor C13 and the capacitor C14 form a pi-type filter circuit, the resistor R1 is connected in series with the capacitor C2 and then connected in parallel with the diode D1 to form an absorption loop, one end of the absorption loop is connected with the transformer TR1, the other end of the absorption loop is connected with the output terminals P2 and P3 through the pi-type filter circuit, the capacitors C4 and C3 are connected in parallel with two ends of the transformer, the resistor R15 is connected in series with the light emitting diode D5, then one end of the absorption loop is connected with the positive pole of the output voltage, and the other end of the secondary side is grounded to form a.
5. The power supply structure according to claim 1, characterized in that: the output voltage feedback loop comprises a resistor R12, a resistor R13, a resistor R14, a resistor R16, a resistor R17, capacitors C15 and C16, a voltage-stabilizing reference source Q1 and a photoelectric coupler U1;
the resistors R16 and R17 are connected in series and then connected in parallel at the output end; one end of the resistor R17 is connected with the reference end of the voltage-stabilizing reference source Q1, and the other end of the resistor R17 is connected with the anode of the Q1; the capacitor C15 is connected in parallel between the cathode of the voltage-stabilizing reference source Q1 and the reference end; the resistor R12 is connected with the capacitor C16 in series and then connected with the resistor R13 in parallel, one end of the resistor R12 is connected with the anode of the photoelectric coupler U1, and the other end of the resistor R3526 is connected to the secondary side of the transformer; the resistor R14 is connected in parallel between the cathode and the anode of the photoelectric coupler U1, and the cathode of the voltage-stabilizing reference source Q1 is connected with the cathode of the photoelectric coupler U1.
6. The power supply structure of claim 1, wherein the fast charging voltage conversion module comprises a synchronous switch buck conversion chip U1, an inductor L1, a resistor R1, a resistor R3, a capacitor C1 to a capacitor C14;
the input voltage is filtered by capacitors C11-C14 and then is connected to the input end of a buck conversion U1, one end of a resistor R3 is connected to a frequency adjustment pin of the buck conversion U1, the other end of the resistor R3 is grounded, one end of a capacitor C3 is connected to a bootstrap capacitor pin of a chip U1, the other end of the capacitor C3 is connected to a switch node of the chip, one end of an inductor L1 is connected to a switch node of the buck conversion U1, the other end of the inductor is connected to an output current limiting detection pin of the chip after being filtered by a capacitor C3, a capacitor C4, a capacitor C6 and a capacitor C7, and an output pin of.
7. The power supply structure according to claim 1, characterized in that: the first output circuit of the USBA port is the same as the second output circuit of the USBA port, and comprises a synchronous switch buck conversion chip U1, a USB interface Y1, a resistor R2 and capacitors C15-C18, wherein fast charge identification signal pins DM and DP of the buck conversion chip U1 are respectively connected with the USB interface Y1 after being filtered by the capacitors C17 and C18; the resistor R2 is used as a discharge resistor, one end of the resistor R2 is grounded, and the other end of the resistor R2 is connected with a voltage output pin of the buck conversion chip U1; the output pin of the buck conversion chip U1 is connected with the VCC end of the USB interface Y1 through the filter capacitors C15 and C16.
8. The power supply structure according to claim 1, characterized in that: the TYPE-C port fast charging identification output circuit comprises a synchronous switch voltage reduction conversion chip U1, a TYPE-C port Y2, capacitors C15 and C16 and a resistor R2; one end of the resistor R2 is grounded, and the other end is connected with a voltage output pin of the chip U1; an output pin of the chip U1 is connected with a power supply pin VBUS of a TYPE-C interface Y2 through filter capacitors C15 and C16; the DM pin of the chip U1 is connected with the data pins DN1 and DN2 of the interface Y2; the DP pin of the chip U1 is connected with the DP1 and DP2 of the interface Y2; the chip U1 detects that the pins CC1 and CC2 are respectively connected to the corresponding pins of the TYPE-C interface.
CN202010274827.7A 2020-04-09 2020-04-09 45W broadband voltage adaptive PPS super fast charging mobile power structure Pending CN111509825A (en)

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