CN203827185U - Switching power supply circuit being compatible with various communication command and supporting multistage buck-boost - Google Patents

Switching power supply circuit being compatible with various communication command and supporting multistage buck-boost Download PDF

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Publication number
CN203827185U
CN203827185U CN 201420231400 CN201420231400U CN203827185U CN 203827185 U CN203827185 U CN 203827185U CN 201420231400 CN201420231400 CN 201420231400 CN 201420231400 U CN201420231400 U CN 201420231400U CN 203827185 U CN203827185 U CN 203827185U
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circuit
power supply
connected
output
input
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CN 201420231400
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Chinese (zh)
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张昌山
方烈义
孙志强
张秀红
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昂宝电子(上海)有限公司
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Abstract

The utility model discloses a switching power supply circuit being compatible with various communication commands and supporting multistage buck-boost. The switching power supply circuit comprises an AC input rectifying and EMI filtering circuit, a flyback switching circuit, a control circuit, a power supply circuit, an output rectifying and filtering circuit, a feedback sampling circuit, an overshoot absorption circuit, a command protocol receiving and coding circuit and a command transmission circuit, wherein an input end of the AC input rectifying and EMI filtering circuit is connected with an AC power supply, and an output end is connected with an input end of the power supply circuit; an input end of the flyback switching circuit is connected with an output end of the control circuit and an output end of the overshoot absorption circuit, and an output end is connected with an input end of the output rectifying and filtering circuit; and an input end of the control circuit is connected with an output end of the power supply circuit and an input end of the feedback sampling circuit, and the output end is connected with the input end of the flyback switching circuit, an input end of the command protocol receiving and coding circuit and an input end of the command transmission circuit.

Description

兼容多种通信指令和支持多级升降压的开关电源电路 Compatible with a variety of communication commands and multi-level buck-boost switching power supply circuit

技术领域 FIELD

[0001] 本实用新型涉及电路领域,更具体地涉及一种具备支持接收多种不同的通信指令并且输出电压可调节的特征的开关电源电路。 [0001] The present invention relates to the field of circuits, and more particularly, to a switching power supply circuit which includes a support for receiving a plurality of different communication command and the output voltage of adjustable features.

背景技术 Background technique

[0002]目前,市场上惯常设计的开关电源充电器仅兼容一种通信协议,从而只能为一种相同类型的便携式设备充电。 [0002] Currently, the market usual switching power supply charger designed only compatible with a communication protocol, so that only charge a portable apparatus of the same type. 作为示例,图1示出了现有技术中仅支持一种协议方案的开关电源系统的示例性框图。 As an example, FIG. 1 illustrates an exemplary block diagram of a prior art switching power supply system only supports a protocol scheme. 如图1所述,在仅支持一种协议方案(例如诸如电流信号的A类通信指令)的开关电源系统中,A类便携式设备100通过其主控芯片101向开关电源200发送A类通信指令,开关电源200中的解码芯片201解码指令后通过功率控制模块202对输出功率进行控制,从而向该便携设备的负载模块102提供具备可调性的电能。 As shown in Figure 1, the scheme supports only one protocol (e.g., such as class A communication command current signal) of the switching power supply system, Class A Class A portable communication device 100 transmits an instruction to the switching power supply 200 through which the main chip 101 , after controlling the switching power supply 200 decodes the instruction decoder chip 201 through the power control module 202 output power to the load module to the portable device 102 is provided to provide power adjustability. 然而由于指令的不兼容,该开关电源200无法向A类便携式设备之外的其它便携设备提供输出调节的功能。 However, due to incompatibility instruction, the switching power supply 200 can not provide output regulation function to other portable devices than the Class A portable device.

[0003] 作为另一示例,图2示出了现有技术中仅支持一种协议方案的副边控制开关电源快充电路的示例性图示。 [0003] As another example, FIG. 2 shows an exemplary illustration of the secondary side power switch controlled fast charge circuit of the prior art only support one protocol scheme. 如图2所示,B类便携式设备仅支持一种协议方案(例如诸如电压信号的B类通信指令),通过仅支持B类通信指令的接收器向开关电源的控制电路提供指令,从而控制供电电路对该便携式设备充电。 2, the portable device type B supports one protocol scheme (e.g., such as a type B communication command voltage signal) only, providing instructions to the switching control circuit power supply via the communication command B only supports a receiver, thereby controlling the power supply circuit to charge the portable device. 同样,该开关电源无法向B类便携式设备之外的其它便携设备提供输出调节的功能。 Also, the switching power supply can not provide output regulation function to other portable devices than the Class B portable device.

[0004] 而当给不同的便携式设备进行充电时,由于便携式设备所发的通信指令不同,往往需要更换不同的电源充电器给其充电。 [0004] When charging to a different portable device, the portable device due to the different communication commands issued, often need to switch to a different power supply charger to charge it. 显然,这给操作者的操作带来了极大的麻烦。 Obviously, this operation the operator to bring a great deal of trouble.

[0005] 因此,迫切需要一种能够兼容不同通信协议(指令)、且输出电压灵活可调的开关电源电路。 [0005] Accordingly, an urgent need for a different communication protocols compatible (instruction), and the output voltage of the switching power supply circuit is flexible and adjustable.

实用新型内容 SUMMARY

[0006] 至少为了解决以上技术难点,本实用新型提供了一种设计和制造成本低,电路结构简单,兼容性好的输出电压电流可调的开关电源电路。 [0006] In order to solve at least the above technical problems, the present invention provides a design and low manufacturing costs, a simple circuit structure, and good compatibility with adjustable voltage and current output switching power supply circuit.

[0007] 根据本实用新型的开关电源电路,包括AC输入整流、EMI滤波电路、反激开关电路、控制电路、供电电路、输出整流滤波电路、反馈取样电路、过冲吸收电路、指令协议接收编码电路以及指令传输电路,其中:AC输入整流、EMI滤波电路的输入端与交流电源相连接,输出端与供电电路的输入端相连接;反激开关电路的输入端与控制电路的输出端和过冲吸收电路的输出端相连接,输出端与输出整流滤波电路的输入端相连接;控制电路的输入端与供电电路的输出端、反馈取样电路的输入端相连接,输出端与反激开关电路的输入端、指令协议接收编码电路的输入端以及指令传输电路的输入端相连接;供电电路的输入端与AC输入整流、EMI滤波电路的输出端相连接,输出端与反馈取样电路的输入端以及控制电路的输入端相连接;输出整流滤波电路的输入端与反 [0007] According to the present invention, a switching power supply circuit comprising an AC input rectifier, EMI filter circuit, a flyback switching circuit, control circuit, power supply circuit, the output of rectifier filter circuit, a feedback sampling circuit, overshoot snubber circuit, an instruction protocol to receive encoded a transmission circuit and a command circuit, wherein: AC input rectification, EMI filter circuit and the input terminal of the AC power supply is connected to the input end of the output terminal of the power supply circuit is connected; flyback output of the input switching circuit and the control circuit and over red absorption circuit is connected to the output terminal, the input terminal and the output terminal of the output rectifier and filter circuit; input end of the input terminal and the output terminal of the power supply circuit of the control circuit, the feedback sampling circuit is connected to the output terminal of the flyback switching circuit the input circuit receives the encoded commands protocol input terminal and the input terminal is connected to the instruction transmission circuit; input of AC input power rectifying circuit, EMI filter circuit output terminal is connected to the input terminal and the output terminal of the feedback sampling circuit and a control circuit connected to the input; input output rectifier filter circuit and the counter 开关电路的输出端相连接,输出端与负载以及指令协议接收编码电路的输入端相连接;反馈取样电路的输入端与供电电路的输出端、控制电路的输入端相连接,输出端与过冲吸收电路的输入端相连接;过冲吸收电路的输入端与反馈取样电路的输出端相连接,输出端与反激开关电路的输入端相连接;指令协议接收编码电路的输入端与控制电路的输出端、输出整流滤波电路的输出端以及指令传输电路的输出端相连接,输出端与负载相连接;并且指令传输电路的输入端与控制电路的输出端相连接,输出端与输出整流滤波电路的输入端、指令协议接收编码电路的输入端相连接。 The output terminal of the switching circuit is connected to the output terminal of the load and the received protocol command encoding circuit connected to the input; feedback sampling output of the input circuit of the power supply circuit, a control circuit connected to the input, output of overshoot absorption circuit connected to the input; overshoot input absorption circuit of the feedback sampling circuit connected to the output terminal, an output terminal and the input terminal of the flyback switching circuit is connected; protocol command circuit receives the encoded input terminal of the control circuit output terminal an output terminal, an output terminal and a rectifying and filtering circuit connected to the instruction transmission circuit, and an output terminal connected to a load; and instructs the output terminal and the input terminal of the control circuit of the transmission circuit is connected to an output terminal and an output rectifier and filter an input terminal, receiving the encoded command protocol connected to the input circuit.

[0008] 本实用新型开关电源充电电路内含市场上多种主流通信协议的解码电路,对不同类型的便携式设备所发出的通信指令都能得到很好的加以识别,从而判别是A类型设备、B类型设备、还是C类设备,采用本实用新型开关电源电路所设计的开关电源充电器可以仅用一个充电器给市场上不同类型的设备进行充电,并且根据不同的通信指令输出不同的等级的电压,在极大提高系统充电效率的同时,也极大的提高了对各种不同类型便携式设备的兼容性。 [0008] The switching power supply according to the present invention, the charging circuit contains a decoding circuit to be good on the market a variety of communication protocols mainstream, can get different types of communication command issued by the portable device identification, device type A is thereby determined, device type B, or class C device, according to the present invention, the switching power supply circuit can be designed with only a switching power supply charger charger for different types of devices on the market is charged and outputs of different levels according to different communication command voltage, the charging efficiency is greatly improved while the system, but also greatly improves the compatibility of different types of portable devices.

[0009] 例如当生产厂家在生产便携式设备的充电器时,仅需针对该解码电路制造一种充电设备就能够很好的兼容几乎市场上所有的便携式设备,极大的节约了系统制造成本、安规认证成本。 [0009] For example, when the charger manufacturers in the production of the portable device, only the decoding circuit for producing a charging apparatus can be well compatible with almost all the portable device market, a great saving manufacturing cost system, certification costs. 并且在未来可能大大的减少市场上充电器的数量,从而极大的减少以往由于大量的废旧充电器废弃所造成的环境污染。 And can greatly reduce the number of chargers on the market in the future, thereby greatly reducing the environmental pollution in the past due to the large amount of waste caused by discarded charger.

[0010] 将本实用新型提供的开关电源应用在便携式设备电池充电领域应用,可以应用在多种不同类型的便携式设备的充电场合,可以极大的节约系统成本。 [0010] The switching power supply applications of the present invention provides a portable device used in the field of battery charging, charging may be applied in a variety of applications of different types of portable devices, can be a great saving system cost.

附图说明 BRIEF DESCRIPTION

[0011] 从下面结合附图对本实用新型的具体实施方式的描述中可以更好地理解本实用新型,其中: [0011] from the following drawings may be better understood with the present invention, wherein the description of the present invention in specific embodiments:

[0012] 图1示出了现有技术中仅支持一种协议方案的开关电源系统的示例性框图; [0012] FIG. 1 shows an exemplary block diagram of a prior art switching power supply system only supports a protocol scheme;

[0013] 图2示出了现有技术中仅支持另一种协议方案的副边控制开关电源快充电路的示例性图示; [0013] FIG. 2 shows a prior art exemplary illustration only secondary support another embodiment of the control protocol switching power fast charging path;

[0014] 图3示出了根据本实用新型实施例的多通信协议兼容方案的概要性框图; [0014] FIG 3 illustrates a schematic block diagram of a multi-communication protocol of the present invention is compatible with solutions of the embodiment;

[0015] 图4示出了根据本实用新型实施例的开关电源电路的一种示例性接法; [0015] FIG 4 illustrates an exemplary connection A switching power supply circuit according to the present embodiment of the invention;

[0016] 图5示出了根据本实用新型实施例的开关电源电路的另一种示例性接法; [0016] FIG. 5 shows another exemplary connection of the switching power supply circuit according to the present embodiment of the invention;

[0017] 图6示出了根据本实用新型实施例的开关电源电路的一种接法的详细图示; [0017] FIG. 6 shows a detailed illustration of a connection in accordance with one of the switching power supply circuit according to the present invention embodiment;

[0018] 图7示出了外部电阻降压时控制下降时间的一种示例性方法; [0018] FIG. 7 illustrates an exemplary method for controlling a fall time of the external resistance voltage;

[0019] 图8示出了外部电阻降压时控制下降时间的另一种示例性方法; Another exemplary method of fall time control [0019] FIG. 8 shows an external resistance voltage;

[0020] 图9示出了根据本实用新型实施例的开关电源电路的供电电路的一种示例性接法; [0020] FIG 9 illustrates an exemplary power supply circuit according to one connection of the switching power supply circuit according to an embodiment of the invention;

[0021] 图10示出了根据本实用新型实施例的开关电源电路的供电电路的另一种示例性接法;以及 [0021] FIG. 10 shows another exemplary connection of the power supply circuit of the switching power supply circuit according to the present embodiment of the invention; and

[0022] 图11示出了根据本实用新型实施例的开关电源电路的过冲吸收电路的多种示例性接法。 [0022] FIG. 11 shows a switching power supply circuit according to the embodiment of the present invention absorb overshoot various exemplary circuit connection.

具体实施方式[0023] 下面将详细描述本实用新型各个方面的特征和示例性实施例。 DETAILED DESCRIPTION [0023] The novel features of the various aspects of the present practical and exemplary embodiments will be described in detail below. 下面的描述涵盖了许多具体细节,以便提供对本实用新型的全面理解。 The following description covers many specific details in order to provide a thorough understanding of this new type of utility. 但是,对于本领域技术人员来说显而易见的是,本实用新型可以在不需要这些具体细节中的一些细节的情况下实施。 However, the skilled person it will be apparent that the present invention may be practiced without these specific details in some detail. 下面对实施例的描述仅仅是为了通过示出本实用新型的示例来提供对本实用新型更清楚的理解。 The following description of the embodiments by merely for illustrating examples of the novel utility of the present invention to provide a clearer understanding. 本实用新型绝不限于下面所提出的任何具体配置,而是在不脱离本实用新型的精神的前提下覆盖了相关元素或部件的任何修改、替换和改进。 The present invention is in no way limited to any particular configuration set forth below, but covers any modification without departing from the related elements or components of the present novel premise practical spirit, substitutions and improvements.

[0024] 根据本实用新型实施例的开关电源电路由两部分组成,一部分为原边反馈PWM控制主控芯片,另外一部分为通信协议接收和编码芯片。 [0024] The switching power supply circuit according to the present embodiment of the invention consists of two parts, part of the primary-side PWM control of the control chip, another part of the communication protocol to receive and code chip.

[0025] 根据一个实施例,图3示出了根据本实用新型实施例的多通信协议兼容方案的概要性框图。 [0025] According to one embodiment, FIG. 3 shows a schematic block diagram of a multi-protocol compliant communication scheme of the present embodiment of the invention embodiment. 如图3所示,开关电源300包括连接至供电输入310的功率器件301、指令协议接收编码电路(指令接收器)302和305、控制芯片304、以及可选地包括上述组件之间的隔离组件303。 3, switching power supply 300 includes a power supply input connected to the device 301,310, the instruction encoding circuit receiving protocol (command receiver) 302 and 305, the control chip 304, and optionally a spacer assembly between the components 303. 功率器件301向所连接的便携式设备302输出功率,而不同类型的便携式设备向开关电源发送不同的输出电压调节指令(例如指令A、指令B)。 Power device 301 to the portable device 302 connected to the output power, and different types of portable device transmits to the switching power supply output voltage adjustment command (e.g. instruction A, instruction B).

[0026] 在图3中,供电部分适用交流或直流供电等各种供电方式。 [0026] In FIG. 3, the power supply portion applicable to other AC or DC power supply. 不同类型的便携式设备向开关电源发送不同的输出电压调节指令,其传输方式可以有电流传输或电压传输,包括单线或多线等多种编码方式。 Different types of portable devices to different transmission switching power supply output command voltage regulation, which can have a current transmission voltage transmission or transmission, comprising a plurality of single-line or multi-line encoding like. 指令类型包括电流脉冲、电压脉冲、数字脉冲信号、PWM脉冲电压等多种指令。 Instruction type instructions include a variety of current pulses, voltage pulses, a digital pulse signal, the PWM pulse voltage. 开关电源类型包括隔离型和非隔离型等各种电路结构,隔离型电路结构中其反馈方式适用于原边反馈方式,另外开关电源功率转换拓扑结构包括降压Buck、升压Boost、升降压Buck-Boost、反激Flyback、正激Forward等各种电路拓扑结构。 Type switching power supply comprises a non-isolated and isolated various other circuit configurations, the circuit configuration in which isolated feedback method is applicable to primary feedback mode, the switching power supply further comprises a buck power converter topology, the Buck, Boost Boost, buck Buck-Boost, flyback flyback, Forward Forward other circuit topologies.

[0027] 为便于阐述本实用新型的内容,根据一个实施例,以下以一种用于手机外置充电器的反激式开关电源为例进行说明,但是,本领域技术人员应当理解,本实用新型覆盖范围并不仅限于以下实例应用,而是具有更广泛的应用范围。 [0027] For ease of illustrating the present invention the content, according to one embodiment, the flyback switching power supply to one kind of external charger for mobile phone as an example, however, skilled in the art will appreciate that the present invention new coverage is not limited to the following examples and applications, but has a broader range of applications.

[0028] 图4示出了根据本实用新型实施例的开关电源的一种示例性接法。 [0028] FIG 4 illustrates an exemplary connection of the switching power supply according to one embodiment of the present invention. 在图4中,电路采用交流输入,电路结构为隔离型反激式开关电源电路。 In FIG. 4, the circuit uses an AC input, the circuit structure is isolated flyback switching power supply circuit. 二次侧负载设备的发出的A类指令,其方法是通过输出负载电流按特定规律变化的方式,将其变化通过反激变压器Tl-A传输至原边芯片U1,来控制输出电压的变化。 A class of instructions issued by the secondary side of the load device, which is the output load current changes in a specific manner the law, it changes the transmission Tl-A flyback transformer to the primary side through the chip U1, to control the output voltage changes. 而如果负载设备发出了B类指令(例如电压脉冲或电压准位按特定规律(pattern)变化),则B类指令可以通过数据接收端D-和/或D+进入芯片U3,芯片U3识别B类指令后对其进行编码,从而将经编码的信号经由光电耦合器U2-A传输至原边芯片Ul,用于控制输出电压的变化。 If the load device sends a B class of instructions (e.g., a voltage pulse or a voltage level of a specific law (pattern) change), then class B instruction by the data receiving terminal D- and / or D + into the chip U3, the chip U3 recognition class B after its instruction code, so that the encoded signals of the photo U2-a transmission is coupled to the primary side via the chip Ul, for controlling the output voltage variation.

[0029] 图5示出了根据本实用新型实施例的开关电源电路的另一种示例性接法。 [0029] FIG. 5 shows another exemplary connection of the switching power supply circuit according to the present embodiment of the invention. 如图5所示,根据线路启动方式和供电方式的不同,电路还可以衍生出另外一种形式的电路接法。 5, according to the power supply line and the start of a different embodiment, the circuit may also be derived from another form of circuit connection. 例如,控制电路的控制芯片Ul可以是8引脚的。 For example, the control circuit control chip Ul may be 8-pin. 并且输入整流滤波电路与供电电路之间的电阻R2可以被连接至输入整流滤波电路与控制电路的控制芯片Ul的GATE引脚之间,以提供不同的可控供电方式。 And a resistor R2 between the input rectifying and filtering circuit with the power supply circuit may be connected between the control chip Ul GATE pin input rectifier filter circuit and the control circuit to provide a controllable supply of different ways.

[0030] 图6示出了根据本实用新型实施例的开关电源电路的一种接法的详细图示。 [0030] FIG. 6 shows a detailed illustration of a connection in accordance with one of the switching power supply circuit according to the present invention embodiment. 如图6所示,根据本实用新型实施例的可调反激式开关电路主要包括以下组件:AC输入整流、EMI滤波电路⑴、反激开关电路(2)、控制电路(3)、供电电路⑷、输出整流滤波电路(5)、反馈取样电路(6)、过冲吸收电路(7)、指令协议接收编码电路(8)、以及指令传输电路(9)。 6, The adjustable flyback switching circuit according to the present invention includes the following embodiment mainly components: AC input rectification, EMI filter circuit ⑴, flyback switching circuit (2), the control circuit (3), the power supply circuit ⑷, the output rectifier and filter circuit (5), the feedback sampling circuit (6), overshoot absorbing circuit (7), receiving protocol instruction encoding circuit (8), and a command transfer circuit (9).

[0031] AC输入整流、EMI滤波电路⑴可以包括保险丝FUSE、桥式整流器、X电容部分。 [0031] AC input rectification, EMI filter circuit may comprise a fuse ⑴ FUSE, a bridge rectifier, X capacitance portion. AC输入整流、EMI滤波电路(I)的AB两点之间还可以包括本领域的其它常见接法。 Rectifying the AC input, between the EMI filter circuit (I) may further comprise the AB two other common connection in the art.

[0032] 反激开关电路(2)可以包括反激变压器T1-A、开关MOSFET管或BJT三极管Q2、以及原边电流取样电阻部分R7。 [0032] The flyback switching circuit (2) may include the flyback transformer T1-A, the MOSFET or BJT switching transistor Q2, and the primary current sampling resistor portion R7.

[0033] 控制电路(3)的主要器件是一颗PWM控制芯片及必要的外围辅助元件,本实施例中是一颗六个功能脚(Pin)或八个功能脚的控制芯片,其中(不按脚位顺序): [0033] The control circuit (3) of the main device is a PWM control chip and the necessary external auxiliary elements, in the present embodiment is a function of six feet (Pin) or eight chip control function pin, wherein (not press the pin order):

[0034] VDD:供电输入脚,用于芯片供电启动,与供电电路⑷相连, [0034] VDD: power supply input pin for the chip power supply is started, the power supply circuit connected ⑷,

[0035] FB:反馈取样脚,用于检测输出电压,与反馈取样电路(6)相连, [0035] FB: Feedback sampling feet for detecting the output voltage, is connected to the feedback sampling circuit (6),

[0036] GND:芯片地脚,芯片的参考地, [0036] GND: ground pin chip, the chip's ground reference,

[0037] GATE =Gate驱动脚,用于控制功率MOSFET或BJT三极管的开关,与反激开关电路 [0037] GATE = Gate drive pin, for controlling the power MOSFET or a BJT switching transistor, flyback switching circuit

(2)相连, (2) is connected,

[0038] CS:电流采样脚,用于检测变压器原边电流,在采样电阻R7上采集电压信息,与反激开关电路⑵相连, [0038] CS: current sampling feet for detecting primary current transformers, voltage information collected in the sampling resistor R7, is connected to the flyback switching circuit ⑵,

[0039] DATA:通信指令脚,用于接收负载设备传送的调节输出电压和电流的指令信息,与指令协议传输电路(8)相连, [0039] DATA: foot communication instructions, instructions for adjusting the output voltage and current information received load transmission device, a transmission circuit connected to the protocol command (8),

[0040] SOURCE:源级脚,在采用八脚芯片的电路中带有此脚,与反激开关电路(2)中的MOSFET源级或BJT三极管的发射极相连,以及 [0040] SOURCE: source-level foot, the foot with this circuit uses eight feet chip, connected to the emitter of flyback switching circuit (2) the source of the MOSFET or BJT transistor stage, and

[0041] CMP:环路补偿脚,在采用八脚芯片的电路中带有此脚,外接环路补偿电容,用于改善负反馈系统环路响应及稳定性。 [0041] CMP: loop compensation pin, this pin with the eight-pin circuit chip, the external loop compensation capacitor for improving the negative feedback loop system response and stability.

[0042] 指令协议接收编码电路(8)是6功能脚的解码编码芯片,可以接收但不限于以下信号:电压准位信号、电流准位信号、PWM脉冲调制信号、数字编码信号等。 [0042] The instruction receiving protocol encoding circuit (8) is a function of pin 6 decodes the encoded chip, receiving but not limited to the following signals: signal voltage level, current level signal, the PWM signal is pulse-modulated, digitally encoded signals. 并且在本实施例中,指令协议接收编码电路(8)的引脚如下(不按脚位顺序): And in the present embodiment, the instruction receiving protocol encoding circuit (8) as pins (not to terminal order):

[0043] VDD:供电脚,用于芯片供电启动与主控制电路输出部分(5)相连, [0043] VDD: power supply pin for chip control output power to start the main circuit section (5) is connected,

[0044] GND:芯片地脚,芯片的参考地, [0044] GND: ground pin chip, the chip's ground reference,

[0045] D+:数据正接收端脚, [0045] D +: positive data pin receiving end,

[0046] D-:数据负接收端脚, [0046] D-: a negative data pin receiving end,

[0047] VD:信号传输脚,该脚的编码脉冲通过光稱传输电路(9)传输到PWM控制芯片 [0047] VD: signaling pin, the pin encoding pulse by said light transmitting circuit (9) to the PWM control chip

(3),以及 (3), and

[0048] VP:通过R8接PWM主控制芯片(3)输出Vbus,控制输出电压下降时的时间长短。 [0048] VP: R8 access by the main PWM control chip (3) output Vbus, control the length of time the output voltage decreases. 作为一个示例,图7示出了外接电阻用于控制输出电压下降时间的一种示例性方法。 As one example, FIG. 7 illustrates an exemplary method of external resistor for controlling the output voltage falling time.

[0049] 根据另一个实施例,图8示出了无外接电阻输出电压下降控制的另一种示例性方法。 [0049] According to another embodiment, FIG. 8 illustrates another exemplary method without external control of the output voltage drop resistor.

[0050] 此外,除了图6中示出的接法之外,供电电路⑷的A、B两点之间还有其它接法。 [0050] Further, in addition to the connection shown in FIG. 6, the power supply circuit ⑷ A, between points A and B as well as other access methods. 例如,根据一个实施例,图9示出了根据本实用新型实施例的开关电源电路的供电电路的一种示例性接法;图10示出了根据本实用新型实施例的开关电源电路的供电电路的另一种示例性接法。 For example, according to one embodiment, FIG. 9 illustrates an exemplary power supply circuit according to one connection of the switching power supply circuit of the embodiment of the present invention embodiment; FIG. 10 shows a switching power supply circuit according to the embodiment of the invention another exemplary circuit connection. 如图9所示,A点可以通过电阻R3,经由开关Ql连接至B点;或者,如图10所示,A点可以通过电阻R3直接连接至B点。 As shown in FIG. 9, A point can be connected through a resistor R3 via a switch Ql to point B; or, as shown in FIG. 10, A to point B may be connected directly to the point through a resistor R3.

[0051] 如图6所示,输出整流滤波电路(5)可以包括输出整流二极管D8、滤波电容C6、及输入假负载三个主要部分,根据EMI的需要,输出整流二极管视D8可以并联RC吸收电路,针对不同的输出纹波要求,输出滤波电路可以增加η型滤波电路或者共模滤波电路。 [0051] As shown in Figure 6, the output rectifier and filter circuit (5) may include an output rectifying diode D8, filter capacitor C6, and enter the dummy load three main parts, the EMI necessary, depending on the output rectifier diode D8 can absorb parallel RC circuit, the output ripple for different requirements, the output of the filter circuit can be increased η common mode type filter circuit or filter circuit. 输出整流滤波电路(5)AB两点之间还可以包括本领域的其它常见接法。 An output rectifier and filter circuit (5) between points AB may also include other commonly-connected in the art.

[0052] 反馈取样电路(6)可以包括变压器辅助绕组T1-B、以及由一个或多个电阻R4、R5组成的分压电阻网络,从而检测输出电压信息。 [0052] The feedback sampling circuit (6) may include information for auxiliary winding T1-B, and the resistor R4 is represented by one or more divider resistors R5 form, thereby detecting the output voltage.

[0053] 过冲吸收电路(7)可以包括吸收电阻R6、吸收电容C5和单向二极管D7三部分。 [0053] overshoot absorbing circuit (7) may include an absorption resistance R6, D7 absorption three parts wheeling diode and a capacitor C5. 根据一个实施例,图11示出了根据本实用新型实施例的开关电源电路的过冲吸收电路的多种示例性接法。 According to one embodiment, FIG. 11 shows a switching power supply circuit of the embodiment of the present invention absorb overshoot various exemplary circuit connection. 此外,过冲吸收电路(7)中A、B两点之间还可以包括但不限于如图11所述的接法。 Further, overshoot absorbing circuit (7) A, between points A and B may further include, but is not limited to the connection 11 to FIG.

[0054] 指令传输电路(9)可以包括一个或多个限流电阻R9、光耦合器U2-BA、U2_B。 [0054] The command transfer circuit (9) may comprise one or more current limiting resistors R9, optocoupler U2-BA, U2_B. 指令传输电路(9)被连接在原边反馈PWM控制器(3)、输出电路(5)以及指令协议接收编码电路 Instruction transmission circuit (9) is connected to the primary side feedback PWM controller (3), an output circuit (5) and a command circuit receives the encoded protocol

(8)之间。 (8). 当指令协议接收编码电路(8)接收到便携式移动设备提供的升压或降压信号时,通过内部转换给出不同类型的信号包括但不限于:电压准位信号、PWM脉冲调制信号、数字编码信号等。 When receiving an instruction protocol encoding circuit (8) receiving the signal boost or buck the portable mobile devices are given different types of signals include but are not limited to an internal transformation: a voltage level signal, the PWM signal is pulse-modulated, digitally encoded signals. 信号通过光耦传输到PWM控制器(3)的一次测实现二次侧输出电压的多级输出。 Signal to the PWM controller (3) is a multi-level measurement output of the secondary side output voltage of the transmission through the optocoupler.

[0055] 本实用新型提供的开关电源电路具有以下优点:制造成本低,电路结构简单,兼容性好且输出电压电流可调。 [0055] The present invention provides a switching power supply circuit has the following advantages: low cost, simple circuit structure, and the good compatibility adjustable output voltage and current.

[0056] 以上已经参考本实用新型的具体实施例来描述了本实用新型,但是本领域技术人员均了解,可以对这些具体实施例进行各种修改、组合和变更,而不会脱离由所附权利要求或其等同物限定的本实用新型的精神和范围。 [0056] above with reference to specific embodiments of the present invention will be described the embodiments of the present invention, those skilled in the art are aware that various modifications, combinations and variations of these specific embodiments without departing from the appended of the present claims or the equivalents spirit and scope of the invention as defined by. 此外,附图中的任何信号箭头应当被认为仅是示例性的,而不是限制性的,除非另有具体指示。 Additionally, any signal arrows in the accompanying drawings shall be considered only as exemplary, and not limiting, unless otherwise specifically indicated. 当术语被预见为使分离或组合的能力不清楚时,组件或者步骤的组合也将被认为是已经记载了。 When the term is foreseen that the ability to separate or combine is unclear, combination of components or steps will also be considered as already described.

Claims (11)

1.一种开关电源电路,包括AC输入整流、EMI滤波电路、反激开关电路、控制电路、供电电路、输出整流滤波电路、反馈取样电路、过冲吸收电路、指令协议接收编码电路以及指令传输电路,其中: 所述AC输入整流、EMI滤波电路的输入端与交流电源相连接,输出端与所述供电电路的输入端相连接; 所述反激开关电路的输入端与所述控制电路的输出端和所述过冲吸收电路的输出端相连接,输出端与所述输出整流滤波电路的输入端相连接; 所述控制电路的输入端与所述供电电路的输出端、所述反馈取样电路的输入端相连接,输出端与所述反激开关电路的输入端、所述指令协议接收编码电路的输入端以及所述指令传输电路的输入端相连接; 所述供电电路的输入端与所述AC输入整流、EMI滤波电路的输出端相连接,输出端与所述反馈取样电路的输入端以及所述控 1. A switching power supply circuit comprising an AC input rectifier, EMI filter circuit, a flyback switching circuit, control circuit, power supply circuit, the output of rectifier filter circuit, a feedback sampling circuit, overshoot snubber circuit, an encoding circuit and a reception command protocol command transmission circuit, wherein: rectifying the AC input, an AC power supply input terminal is connected to EMI filter circuit, an output terminal connected to an input terminal of the power supply circuit; and an input terminal of the flyback switching circuit and the control circuit and an output terminal of said absorbent overshoot connected to the output circuit, the input terminal and the output terminal of the output rectifier and filter circuit is connected; wherein the control output of the input circuit of the power supply circuit, the feedback sampling circuit input terminal connected to the input terminal and the output terminal of flyback switching circuit, the command circuit receiving encoded protocol and the instructions input terminal connected to the input of the transmission circuit; an input terminal of the power supply circuit and rectifying the AC input, output terminal EMI filter circuit is connected to an input terminal of said feedback output of said sampling circuit and control 制电路的输入端相连接; 所述输出整流滤波电路的输入端与反激开关电路的输出端相连接,输出端与负载以及所述指令协议接收编码电路的输入端相连接; 所述反馈取样电路的输入端与所述供电电路的输出端、所述控制电路的输入端相连接,输出端与所述过冲吸收电路的输入端相连接; 所述过冲吸收电路的输入端与所述反馈取样电路的输出端相连接,输出端与所述反激开关电路的输入端相连接; 所述指令协议接收编码电路的输入端与所述控制电路的输出端、所述输出整流滤波电路的输出端以及所述指令传输电路的输出端相连接,输出端与负载相连接;并且所述指令传输电路的输入端与所述控制电路的输出端相连接,输出端与所述输出整流滤波电路的输入端、所述指令协议接收编码电路的输入端相连接。 Circuit connected to the input terminal; input of the output filter circuit and rectifying the output terminal of the flyback switching circuit connected to an output terminal of said load instruction and receiving encoded protocol connected to the input circuit; said feedback sampling and the output of the input circuit of the power supply circuit, said control circuit is connected to input terminal, output terminal and the input terminal of the absorbent overshoot circuit; overshoot the snubber circuit input and the a feedback sampling circuit output terminal is connected to the output terminal of the input terminal of the flyback switching circuit; said protocol received instruction encoding circuit input terminal and the output terminal of the control circuit, the output of the rectifier filter circuit and an output terminal of said instruction transmission circuit connected to the output, and an output terminal connected to a load; and the instructions input terminal and output terminal of the transmission circuit of the control circuit is connected to the output terminal and the output rectifier and filter an input terminal receiving the instruction protocol encoding circuit connected to the input.
2.根据权利要求1所述的开关电源电路,其特征在于,所述控制电路包括脉冲宽度调制PWM控制芯片,该PWM控制芯片包括: 供电输入脚,用于为所述控制芯片供电,与所述供电电路的输出端相连接; 反馈取样脚,用于检测所述开关电源电路的输出电压,与所述反馈取样电路的输入端相连接; 芯片接地脚,用作所述控制芯片的参考地; 驱动脚,用于驱动所述反激开关电路中的开关管,与所述反激开关电路的输入端相连接; 电流采样脚,用于对所述反激开关电路中的变压器的原边电流进行采样,与所述反激开关电路的输出端相连接;以及通信指令脚,用于接收所述负载传送的调节输出电压和电流的指令信息,与所述指令传输电路的输入端相连。 The switching power supply circuit according to claim 1, characterized in that the control circuit comprises a pulse width modulation (PWM) control chip, the PWM control chip comprises: power input pin for power supply to the control chip, and the output terminal of said power supply circuit is connected; sampled feedback pin for detecting an output voltage of the switching power supply circuit, a feedback input terminal connected to the sampling circuit; chip ground pin, as a reference to the control chip ; drive pin for driving the switch flyback switching circuit, connected to the input of the flyback switching circuit; current sampling feet for the primary side of the flyback transformer in the switching circuit current sampling, connected to the output terminal of a flyback switching circuit; and a communication command pin, command information for regulating the output voltage and current of the load receiving transmitted transmission circuit connected to the instruction input.
3.根据权利要求2所述的开关电源电路,其特征在于,在采用八脚芯片的电路中,该PWM控制芯片还包括:环路补偿脚,外接环路补偿电容,用于改善负反馈系统环路响应及稳定性。 3. The switching power supply circuit according to claim 2, characterized in that, in the eight-pin circuit chip, the PWM control chip further comprising: a loop compensation pin, the external loop compensation capacitor for improving the negative feedback system loop response and stability.
4.根据权利要求2所述的开关电源电路,其特征在于,在采用八脚芯片的电路中,该PWM控制芯片还包括:源级脚,用于与所述反激开关电路中的MOSFET源级或BJT三极管的发射极相连。 4. The switching power supply circuit according to claim 2, wherein, in the eight-pin circuit chip, the PWM control chip further comprising: a source level feet for MOSFET source and the flyback switching circuit or BJT transistor emitter connected to the gate.
5.根据权利要求2所述的开关电源电路,其特征在于,所述指令协议接收编码电路包括解码编码芯片,该解码编码芯片包括: 供电脚,用于所述芯片的供电启动,与所述控制电路的输出端相连接; 芯片接地脚,用作所述控制芯片的参考地; C:D+脚,用作数据正接收端; D:D-脚,用作数据负接收端;以及E:VD脚,用于信号传输的脚,该E:VD脚的编码脉冲传输到所述PWM控制芯片。 The switching power supply circuit according to claim 2, wherein said instruction reception protocol comprises decoding the encoded coding circuit chip, which decodes the encoded chip comprising: a power supply pin for supplying power to activate the chip, and the a control circuit connected to the output terminal; ground pin chip, the control chip serves as a reference ground; C: D + pin, serving as a data receiving terminal n; D: D- pin, as the negative terminal receiving data; and E: VD foot pin for signal transmission, the E: encoding pulse VD is transmitted to the foot of the PWM control chip.
6.根据权利要求5所述的开关电源电路,其特征在于,该解码编码芯片还包括:F:VP脚,通过电阻连接到所述PWM控制芯片、或者直接连接到所述PWM控制芯片,用于输出电压信号以控制输出电压下降时时间长短。 6. The switching power supply circuit as claimed in claim 5, wherein the chip further comprising decoding the encoded: F: VP pin connected to the PWM control chip via a resistor, or directly connected to the PWM control chip, with the output voltage signal to control the length of time the output voltage drops.
7.根据权利要求1所述的开关电源电路,其特征在于,该开关电源电路还包括光耦传输电路,连接在所述控制电路和所述指令协议接收编码电路之间,用处传输编码脉冲。 7. The switching power supply circuit according to claim 1, wherein the switching power supply circuit further comprises a transmission photo coupler circuit connected between the receiving circuit of the encoding circuit and the control command protocol, a transmission use encoder pulse.
8.根据权利要求1所述的开关电源电路,其特征在于,输出整流滤波电路包括输出整流二极管和滤波电容。 8. The switching power supply circuit according to claim 1, characterized in that the output rectifier filter circuit comprises a rectifier diode and an output filter capacitor.
9.根据权利要求8所述的开关电源电路,其特征在于,输出整流滤波电路还包括π型滤波电路和/或共模滤波电路。 9. The switching power supply circuit according to claim 8, wherein the output circuit further comprises a rectifier filter π-type filter circuit and / or common mode filter circuit.
10.根据权利要求1所述的开关电源电路,其特征在于,反馈电路由取样电阻组成。 10. The switching power supply circuit according to claim 1, wherein the feedback circuit by the sampling resistor.
11.根据权利要求1所述的开关电源电路,其特征在于,通过输出负载电流有规律性的变化及通过变压器耦合,来控制输出电压的方法。 11. The switching power supply circuit according to claim 1, characterized in that the regularity of change of transformer coupling and the method to control the output voltage by the output load current.
CN 201420231400 2014-05-07 2014-05-07 Switching power supply circuit being compatible with various communication command and supporting multistage buck-boost CN203827185U (en)

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CN 201420231400 CN203827185U (en) 2014-05-07 2014-05-07 Switching power supply circuit being compatible with various communication command and supporting multistage buck-boost

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CN104967160A (en) * 2015-06-12 2015-10-07 肖滔 Intelligent charging equipment and application program starting method based same
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CN106487231B (en) * 2015-08-31 2019-07-19 英飞凌科技奥地利有限公司 Electric pressure converter and voltage conversion method
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US10348121B2 (en) 2016-02-05 2019-07-09 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Charging system, lightning protection method for terminal during charging, and power adapter
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CN108450037A (en) * 2016-02-05 2018-08-24 Oppo广东移动通信有限公司 For the charging system of terminal, charging method and power supply adaptor
CN106059025A (en) * 2016-02-05 2016-10-26 广东欧珀移动通信有限公司 Terminal applied charging system and power adapter
US10389164B2 (en) 2016-02-05 2019-08-20 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Charging system, protection method for preventing from impact of surge voltage and power adapter
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US10291043B2 (en) 2016-07-26 2019-05-14 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Charging system, charging method, and power adapter
EP3276780B1 (en) * 2016-07-26 2019-08-21 Guangdong Oppo Mobile Telecommunications Corp., Ltd Charging device and method, power adapter and terminal
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CN108475987A (en) * 2016-08-18 2018-08-31 株式会社Lg化学 Control system for the operation mode for controlling DC-DC electric pressure converters
CN106160418B (en) * 2016-08-19 2019-04-30 苏州博创集成电路设计有限公司 A kind of control method of Switching Power Supply
CN106160418A (en) * 2016-08-19 2016-11-23 苏州博创集成电路设计有限公司 A kind of control method of Switching Power Supply
CN108599595A (en) * 2018-03-30 2018-09-28 上海新进半导体制造有限公司 A kind of communication means of Switching Power Supply and its secondary side to primary side
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