WO2020082713A1 - Controller ic and use thereof - Google Patents

Controller ic and use thereof Download PDF

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WO2020082713A1
WO2020082713A1 PCT/CN2019/084989 CN2019084989W WO2020082713A1 WO 2020082713 A1 WO2020082713 A1 WO 2020082713A1 CN 2019084989 W CN2019084989 W CN 2019084989W WO 2020082713 A1 WO2020082713 A1 WO 2020082713A1
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boost
module
controller
mos tube
voltage
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PCT/CN2019/084989
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French (fr)
Chinese (zh)
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赵志伟
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深圳南云微电子有限公司
广州金升阳科技有限公司
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Publication of WO2020082713A1 publication Critical patent/WO2020082713A1/en

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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
    • H02M3/33507—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 with automatic control of the output voltage or current, e.g. flyback converters
    • H02M3/33523—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 with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop

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

Abstract

Provided in the present invention is a controller IC integrated with a power tube M1 and having a boost function, wherein the controller IC comprises a boost starting and turn-off point selection module; and the boost starting and turn-off point selection module can enable the controller IC to have a boost function when a BOS end is connected to an external device. When the BOS end is grounded, the controller IC does not have a boost function. According to the present invention, wide-range input requirements are realized merely by means of one controller IC and merely by using inductors and diodes at the periphery of the boost topology, the peripheral circuit is simplified, the PCB layout area and size are reduced, and the cost is reduced, meeting the requirements of a high-density, small-sized and low-cost power supply system.

Description

一种控制器IC及其应用A controller IC and its application 技术领域Technical field
本发明涉及一种控制器IC，特别涉及一种开关电源变换器的控制器IC。The invention relates to a controller IC, in particular to a controller IC of a switching power supply converter.
背景技术Background technique
随着新能源技术的发展，开关电源中宽输入电压范围的直流-直流变换器得到了广泛关注。开关电源直流-直流变换器主要由主电路和控制器两部分构成。主电路用于电能转换，一般由开关装置和整流滤波电路等组成，电路结构有Buck、Boost、反激、全桥等等。控制器用于检测变换器电路的工作状态，并产生控制脉冲信号控制变换器中的开关装置，调节传递给负载的电量以稳定输出。With the development of new energy technologies, DC-DC converters with a wide input voltage range in switching power supplies have received widespread attention. The switching power supply DC-DC converter is mainly composed of a main circuit and a controller. The main circuit is used for electric energy conversion, and is generally composed of a switching device and a rectifier filter circuit. The circuit structure includes Buck, Boost, flyback, full bridge, etc. The controller is used to detect the working state of the converter circuit and generate a control pulse signal to control the switching device in the converter, adjust the amount of power delivered to the load to stabilize the output.
如图1所示，为宽范围输入应用电路简化图，主功率拓扑为公知技术，包括输入电压V IN、输出电压V OUT、电容C VIN、C VDD和C OUT、采样模块、控制模块、振荡器模块、驱动模块、控制器、主功率变压器T、辅助绕组Ns2、主功率管M1和M2、采样电阻Rcs、二极管D 1、D 2、D OUT器件组成。GT引脚是控制器的驱动输出，用于控制功率管M2的开启和关断；VDD引脚是控制器的电源输入引脚，用于控制器的供电。为了满足宽范围输入，在V IN电压比较低的时候不能满足控制器的供电需求，需要将V IN升压后给控制器的VDD引脚供电，图1所示的升压电路原理是通过采样模块、控制模块、振荡器以及驱动模块结合电感L 1、功率管M 1和二极管D 1构成的升压拓扑实现的。通过控制M1的开关，实现输出VDD电压的上升，当VDD电压达到控制器的启动点之后，通过采样VDD的电压控制振荡器不工作，使功率管M1关断，进而升压拓扑停止给VDD引脚供电。VDD引脚的掉电时间可通过旁路电容C VDD的大小来设计，当输出电压VOUT建立后，可通过辅助绕组Ns2给VDD引脚供电。图1所示的控制器的其它引脚连接关系和功能与本发明无关，图1并未示出。 As shown in Figure 1, it is a simplified diagram of a wide-range input application circuit. The main power topology is a well-known technology, including input voltage V IN , output voltage V OUT , capacitance C VIN , C VDD and C OUT , sampling module, control module, oscillation Module, drive module, controller, main power transformer T, auxiliary winding Ns2, main power tube M1 and M2, sampling resistance Rcs, diodes D 1 , D 2 , D OUT devices. The GT pin is the drive output of the controller and is used to control the power tube M2 to turn on and off; the VDD pin is the power input pin of the controller and is used for power supply of the controller. In order to meet a wide range of input, when the V IN voltage is relatively low, it cannot meet the power supply requirements of the controller. It is necessary to boost the V IN to the VDD pin of the controller. The principle of the boost circuit shown in Figure 1 is through sampling The module, the control module, the oscillator and the drive module are implemented in combination with the boost topology formed by the inductor L 1 , the power tube M 1 and the diode D 1 . By controlling the switch of M1, the output VDD voltage rises. When the VDD voltage reaches the starting point of the controller, the oscillator is controlled by sampling the voltage of VDD to turn off the power tube M1, and then the boost topology stops giving VDD. Foot power supply. The power-down time of the VDD pin can be designed by the size of the bypass capacitor C VDD . When the output voltage VOUT is established, the VDD pin can be powered through the auxiliary winding Ns2. The other pin connection relationships and functions of the controller shown in FIG. 1 are not related to the present invention, and FIG. 1 is not shown.
可见，图1所示的现有技术中，外围模块复杂、元器件多，PCB布板困难，体积大，采购成本和生产成本都很高，不利于高功率密度小体积模块电源的设计。It can be seen that in the prior art shown in FIG. 1, the peripheral modules are complicated, there are many components, the PCB layout is difficult, the volume is large, and the purchase cost and production cost are very high, which is not conducive to the design of a high-power density small-volume module power supply.
如图2所示，也是现有技术实现宽范围输入的一种应用电路简化图，与图1相比，它把采样模块、控制模块、振荡器模块和驱动模块集成在控制器1里面，使升压功能通过控制器1和外围功率管M1、电感L1和二极管D1构成的升压拓 扑来实现，减少了外围器件，使PCB布局相对简单。但整个电源系统需要用到两个控制器IC和两个功率管，使PCB布板体积增加，而且采购成本和生产成本也较高。As shown in FIG. 2, it is also a simplified diagram of an application circuit for realizing a wide range of input in the prior art. Compared with FIG. 1, it integrates a sampling module, a control module, an oscillator module, and a driving module in the controller 1, so that The boost function is realized by the boost topology formed by the controller 1 and the peripheral power tube M1, the inductor L1 and the diode D1, which reduces peripheral devices and makes the PCB layout relatively simple. But the entire power system needs to use two controller ICs and two power tubes, which increases the PCB layout volume, and the procurement cost and production cost are also high.
可见，在图1和图2所示的现有技术中，为了满足宽范围输入的要求，外围元器件多，PCB布板困难，体积大，采购成本和生产成本都很高，不满足高密度小体积低成本电源系统的需求。It can be seen that in the prior art shown in FIGS. 1 and 2, in order to meet the requirements of a wide range of input, there are many peripheral components, PCB layout is difficult, the volume is large, the purchase cost and production cost are very high, and high density is not satisfied The demand for a small size, low cost power system.
发明内容Summary of the invention
有鉴如此，本发明要解决的技术问题是提供一种控制器IC，集成功率管M1且带升压功能，使宽范围输入要求只通过一个控制器，并且升压拓扑外围只用电感和二极管来实现，简化外围电路，减小PCB布板面积和体积，降低成本，满足高密度小体积低成本电源系统的需求。In view of this, the technical problem to be solved by the present invention is to provide a controller IC that integrates a power tube M1 and has a boost function, so that a wide range of input requirements only pass through a controller, and only the inductor and Diodes are used to simplify peripheral circuits, reduce PCB layout area and volume, reduce costs, and meet the needs of high-density, small-volume, and low-cost power systems.
本发明解决上述技术问题的技术方案是：The technical solution of the present invention to solve the above technical problems is:
一种控制器IC，应用于开关电源，所述开关电源包括由电感L1、二极管D1和旁路电容C VDD组成的升压外围电路，电感L1一端连接开关电源的输入电压V IN，电感L1另一端连接二极管D1的阳极，二极管D1的阴极连接旁路电容C VDD的一端，旁路电容C VDD的另一端接地；所述控制器IC包括控制器IC的BOS端、控制器IC的VDD端和控制器IC的VSS端，所述VDD端连接外部电压，给控制器IC内部电路供电；所述VSS端为控制器IC的地引脚，连接外部地电位；其特征在于：所述控制器IC内部集成了开关电源用于实现升压功能的主功率开关管M1且自带升压功能，所述控制器IC内部包括升压启动与关断点选择模块，所述升压启动与关断点选择模块能实现当所述BOS端连接外部器件时所述控制器IC具有升压功能，当所述BOS端接地时所述控制器IC无升压功能。 A controller IC is applied to a switching power supply. The switching power supply includes a boosting peripheral circuit composed of an inductor L1, a diode D1, and a bypass capacitor C VDD . One end of the inductor L1 is connected to the input voltage V IN of the switching power supply, and another inductor L1 the anode of diode D1 is connected at one end, one end of the bypass capacitor C VDD connected to the cathode of the diode D1 and the other end of the bypass capacitor C VDD; BOS end of the controller IC includes a controller IC, the controller IC and the terminal VDD The VSS terminal of the controller IC, the VDD terminal is connected to an external voltage to supply power to the internal circuit of the controller IC; the VSS terminal is the ground pin of the controller IC, connected to an external ground potential; its characteristic is: the controller IC The main power switch M1 used to realize the boost function is integrated inside the switch power supply and has its own boost function. The controller IC includes a boost start and shutdown point selection module, and the boost start and shutdown point The selection module can realize that the controller IC has a boosting function when the BOS terminal is connected to an external device, and the controller IC has no boosting function when the BOS terminal is grounded.
作为控制器IC的一种具体的实施方式，内部还包括：内部电源与基准模块、电阻分压网络模块、IC启动点选择模块、振荡器模块、驱动模块、N型沟道MOS管M2、N型沟道MOS管M3、N型沟道MOS管M4和P型沟道MOS管M5；As a specific implementation of the controller IC, the internal also includes: an internal power supply and reference module, a resistor divider network module, an IC start point selection module, an oscillator module, a drive module, an N-channel MOS transistor M2, N Type channel MOS tube M3, N type channel MOS tube M4 and P type channel MOS tube M5;
所述内部电源与基准模块的输入端与所述VDD端相连，所述内部电源与基准模块的第一输出端连接所述升压启动与关断点选择模块的第一输入端；所述内部电源与基准模块的第二输出端连接所述IC启动点选择模块的第一输入端；所述内部电源与基准模块的第三输出端连接所述N型沟道MOS管M4的栅极和所 述P型沟道MOS管M5的源极；所述内部电源与基准模块的第四输出端连接所述N型沟道MOS管M2的栅极；所述内部电源与基准模块的第五输出端连接所述P型沟道MOS管M5的栅极；The internal power supply and the input terminal of the reference module are connected to the VDD terminal, and the internal power supply and the first output terminal of the reference module are connected to the first input terminal of the boost startup and shutdown point selection module; the internal The second output terminal of the power supply and the reference module is connected to the first input terminal of the IC start point selection module; the third output terminal of the internal power supply and the reference module is connected to the gate of the N-channel MOS transistor M4 and the The source of the P-channel MOS transistor M5; the internal power supply and the fourth output terminal of the reference module are connected to the gate of the N-channel MOS transistor M2; the internal power supply and the fifth output terminal of the reference module Connect the gate of the P-channel MOS tube M5;
所述电阻分压网络模块的输入端与所述VDD端口相连，所述电阻分压网络模块的第一输出端连接所述升压启动与关断点选择模块的第二输入端；所述电阻分压网络模块的第二输出端连接所述IC启动点选择模块的第二输入端；The input terminal of the resistor-divider network module is connected to the VDD port, and the first output terminal of the resistor-divider network module is connected to the second input terminal of the boost startup and shutdown point selection module; the resistor The second output terminal of the voltage division network module is connected to the second input terminal of the IC start point selection module;
所述升压启动与关断点选择模块的第三输入端与所述N型沟道MOS管M3的漏极以及所述P型沟道MOS管M5的漏极相连；所述升压启动与关断点选择模块的输出端与所述振荡器模块的第一输入端相连；The third input terminal of the boost startup and shutdown point selection module is connected to the drain of the N-channel MOS tube M3 and the drain of the P-channel MOS tube M5; The output terminal of the shutdown point selection module is connected to the first input terminal of the oscillator module;
所述IC启动点选择模块的第三输入端连接所述N型沟道MOS管M3的漏极以及所述P型沟道MOS管M5的漏极；所述IC启动点选择模块的输出端连接所述振荡器模块的第二输入端；The third input terminal of the IC start point selection module is connected to the drain of the N-channel MOS tube M3 and the drain of the P-channel MOS tube M5; the output end of the IC start point selection module is connected The second input terminal of the oscillator module;
所述振荡器模块的输出端与所述驱动模块的输入端相连；The output end of the oscillator module is connected to the input end of the drive module;
所述驱动模块的输出端与所述N型沟道功率MOS管M1的栅极相连；The output end of the driving module is connected to the gate of the N-channel power MOS tube M1;
所述N型沟道功率MOS管M1的漏极和所述N型沟道MOS管M4的漏极分别连接所述BOS端口，所述MOS管M4的源极和所述MOS管M2的漏极分别连接所述MOS管M3的栅极，所述MOS管M3的漏极连接所述MOS管M5的漏极；所述MOS管M1、M2和M3的源极都与控制器IC的内部参考地VSS连接；所有的P沟道MOS管和N沟道MOS管的衬底都与各自的源极连接；The drain of the N-channel power MOS tube M1 and the drain of the N-channel power MOS tube M4 are respectively connected to the BOS port, the source of the MOS tube M4 and the drain of the MOS tube M2 Connect the gate of the MOS tube M3 respectively, the drain of the MOS tube M3 is connected to the drain of the MOS tube M5; the sources of the MOS tubes M1, M2 and M3 are all connected to the internal reference ground of the controller IC VSS connection; the substrates of all P-channel MOS tubes and N-channel MOS tubes are connected to their respective sources;
所述内部电源与基准模块，是将控制器的VDD端口电压转换成内部所需的低压电源VCC，用于IC内部所有低压模块供电；并产生所述升压启动与关断点选择模块所需要的基准电压V ref1和所述IC启动点选择模块所需要的基准电压V ref2；并产生两个偏置电压V BN和V BP，分别作为MOS管M2的栅极偏置电压和MOS管M5的栅极偏置电压，使其偏置在正常工作区； The internal power supply and reference module are used to convert the voltage of the VDD port of the controller into the low-voltage power supply VCC required internally for the power supply of all low-voltage modules inside the IC; and to generate the boost start-up and shutdown point selection module Reference voltage V ref1 and the reference voltage V ref2 required by the IC start point selection module; and generates two bias voltages V BN and V BP , which are used as the gate bias voltage of the MOS transistor M2 and the voltage of the MOS transistor M5, respectively The gate bias voltage makes it biased in the normal working area;
所述电阻分压网络模块，是将控制器的VDD端口电压通过电阻分压网络转换成所述升压启动与关断点选择模块所需要的输入电压V DD1以及所述IC启动点选择模块所需要的输入电压V DD2； The resistor divider network module converts the VDD port voltage of the controller into the input voltage V DD1 required by the boost startup and shutdown point selection module and the IC startup point selection module through the resistor divider network Required input voltage V DD2 ;
所述升压启动与关断点选择模块，是通过将第一输入电压V ref1和第二输入电压V DD1进行比较，用于设置升压功能的启动点和关断点，其输出电压ENP_BT信 号为高电平时，表示启动升压功能，其为低电平时，表示关断升压功能；所述升压启动与关断点选择模块在第三输入信号Boost_L为低电平时，表示升压功能有效，在Boost_L为高电平时，表示升压功能无效； The boost start-up and shutdown point selection module is used to set the startup point and the shutdown point of the boost function by comparing the first input voltage V ref1 and the second input voltage V DD1 , and its output voltage ENP_BT signal When it is high level, it means to start the boost function, when it is low level, it means to turn off the boost function; when the third input signal Boost_L is low level, the boost start and shutdown point selection module means the boost function Valid, when Boost_L is high, it means the boost function is invalid;
所述IC启动点与选择模块，是通过将第一输入信号V ref2和第二输入信号V DD2进行比较，用于在第三输入信号Boost_L为低电平时，即实现升压功能的情况下，选择的IC启动点较高；在Boost_L为高电平时，即升压功能无效时，选择的IC启动点较低；所述IC启动点与选择模块，其输出端ENP信号为高电平时，表示IC正常工作，其为低电平时，表示IC不工作； The IC start point and the selection module are used for comparing the first input signal V ref2 and the second input signal V DD2 when the third input signal Boost_L is at a low level, that is, when the boost function is realized, The selected IC start point is higher; when Boost_L is high level, that is, when the boost function is invalid, the selected IC start point is lower; the IC start point and the selection module, when the output ENP signal is high, it means The IC works normally. When it is low, it means that the IC does not work;
所述振荡器模块，用于产生升压功能所需要的高频时钟信号CLK；所述振荡器模块只有在第一输入信号ENP_BT和第二输入信号ENP都为高电平时，才输出高频时钟信号CLK，否则输出CLK信号为低电平；The oscillator module is used to generate a high-frequency clock signal CLK required for the boost function; the oscillator module outputs a high-frequency clock only when the first input signal ENP_BT and the second input signal ENP are both high level Signal CLK, otherwise the output CLK signal is low level;
所述驱动模块，用于将输入高频时钟信号CLK转换成MOS管M1的栅极驱动信号DRV。The driving module is used to convert the input high-frequency clock signal CLK into the gate driving signal DRV of the MOS transistor M1.
本发明还提供上述控制器IC在开关电源中的应用方案，如下：The invention also provides the application scheme of the above controller IC in the switching power supply, as follows:
应用方案一：所述BOS端口连接所述二极管D1的阳极，所述VDD端口连接所述二极管D1的阴极，实现所述控制器IC的升压功能。Application Solution 1: The BOS port is connected to the anode of the diode D1, and the VDD port is connected to the cathode of the diode D1 to implement the boost function of the controller IC.
应用方案二：所述BOS端口外部接地，不实现所述控制器IC的升压功能。Application scheme 2: The BOS port is externally grounded, and the boosting function of the controller IC is not realized.
本发明的电路工作原理将在具体实施方式进行详细分析说明，与现有技术相比，将本发明的有益效果总结如下：The working principle of the circuit of the present invention will be analyzed and explained in detail in specific embodiments. Compared with the prior art, the beneficial effects of the present invention are summarized as follows:
1、本发明设计一个检测升压功能与否的BOS引脚，通过其悬空或者接地，或者外接器件，实现升压功能是否有效的切换，满足不同客户对功能的要求，对于宽范围输入和正常范围输入灵活选择应用，增加集成电路的能力。1. The present invention designs a BOS pin to detect whether the boost function is active or not, and whether it is floating or grounded, or an external device, to achieve whether the boost function is effectively switched to meet the requirements of different customers for the function, for a wide range of input and normal Range input flexibly selects applications and increases the capacity of integrated circuits.
2、本发明增加了一个升压功能检测引脚BOS，在不增加封装成本的前提下，集成了功率MOS管M1和实现升压功能的模块，高度集成，而且控制器IC内部可使用低压器件，减小IC面积，降低芯片生产成本。2. The invention adds a boost function detection pin BOS. Without increasing the packaging cost, it integrates the power MOS tube M1 and the module that realizes the boost function. It is highly integrated, and low voltage devices can be used inside the controller IC , Reduce IC area, reduce chip production costs.
3、本发明只用了一个控制器，就可以实现升压功能，高度集成，使升压拓扑外围只用电感、二极管和旁路电容来实现，简化外围电路，减小PCB布板面积和体积，降低生产成本和采购成本，满足高密度小体积低成本电源系统的需求。3. The present invention uses only one controller to realize the boost function and is highly integrated, so that only the inductor, diode and bypass capacitor are used for the boost topology, which simplifies the peripheral circuit and reduces the PCB layout area and Volume, reduce production costs and procurement costs, to meet the needs of high-density small-volume low-cost power systems.
附图说明BRIEF DESCRIPTION
图1为现有技术实现宽范围输入的系统应用电路1简化图；FIG. 1 is a simplified diagram of a system application circuit 1 for realizing a wide-range input in the prior art;
图2为现有技术实现宽范围输入的系统应有电路2简化图；Figure 2 is a simplified diagram of the circuit 2 of the prior art system that realizes a wide range of input;
图3为本发明的控制器IC电路原理框图；3 is a block diagram of the controller IC circuit of the present invention;
图4为本发明在光耦反馈反激开关电源应用场景中的电路简化图；4 is a simplified circuit diagram of the present invention in an application scenario of a photocoupler feedback flyback switching power supply;
图5为本发明控制器IC应用于开关电源第一实施例的电路图；5 is a circuit diagram of the first embodiment of the controller IC of the present invention applied to a switching power supply;
图6为本发明控制器IC应用于开关电源第二实施例的电路图。6 is a circuit diagram of a second embodiment of the controller IC of the present invention applied to a switching power supply.
具体实施方式detailed description
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本发明进一步详细说明。In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
图3为本发明的控制器IC电路原理框图，所应用的开关电源包括由电感L1、二极管D1和旁路电容C VDD组成的升压外围电路，电感L1一端连接开关电源的输入电压V IN，电感L1另一端连接二极管D1的阳极，二极管D1的阴极连接旁路电容C VDD的一端，旁路电容C VDD的另一端接地；控制器IC外部引脚包括控制器IC的BOS端、控制器IC的VDD端、和控制器IC的VSS端，内部电路则包括：内部电源与基准模块、电阻分压网络模块、升压启动与关断点选择模块、IC启动点选择模块、振荡器模块、驱动模块、N型沟道功率MOS管M1、N型沟道MOS管M2、N型沟道MOS管M3和、N型沟道MOS管M4、和P型沟道MOS管M5； 3 is a block diagram of the controller IC circuit of the present invention. The applied switching power supply includes a boost peripheral circuit composed of an inductor L1, a diode D1 and a bypass capacitor C VDD . One end of the inductor L1 is connected to the input voltage V IN of the switching power supply. the other end of the inductor L1 connected to the anode of the diode D1, and a cathode connected to one end of the bypass capacitor C VDD diode D1 and the other end of the bypass capacitor C VDD; BOS controller IC includes external pins of the controller IC, the controller IC VDD terminal and the VSS terminal of the controller IC, the internal circuit includes: internal power supply and reference module, resistor divider network module, boost startup and shutdown point selection module, IC startup point selection module, oscillator module, drive Module, N-channel power MOS tube M1, N-channel MOS tube M2, N-channel MOS tube M3 and N-channel MOS tube M4, and P-channel MOS tube M5;
内部电源与基准模块的输入端与VDD端相连，内部电源与基准模块的第一输出端连接升压启动与关断点选择模块的第一输入端；内部电源与基准模块的第二输出端连接IC启动点选择模块的第一输入端；内部电源与基准模块的第三输出端连接N型沟道MOS管M4的栅极和P型沟道MOS管M5的源极；内部电源与基准模块的第四输出端连接N型沟道MOS管M2的栅极；内部电源与基准模块的第五输出端连接P型沟道MOS管M5的栅极；The internal power supply is connected to the input terminal of the reference module and the VDD terminal, the internal power supply is connected to the first output terminal of the reference module, and the first input terminal of the boost startup and shutdown point selection module; the internal power supply is connected to the second output terminal of the reference module The first input terminal of the IC start point selection module; the internal power supply and the third output terminal of the reference module are connected to the gate of the N-channel MOS transistor M4 and the source of the P-channel MOS transistor M5; the internal power supply and the reference module The fourth output terminal is connected to the gate of the N-channel MOS transistor M2; the internal power supply and the fifth output terminal of the reference module are connected to the gate of the P-channel MOS transistor M5;
电阻分压网络模块的输入端与VDD端口相连，电阻分压网络模块的第一输出端连接升压启动与关断点选择模块的第二输入端；电阻分压网络模块的第二输出端连接IC启动点选择模块的第二输入端；The input terminal of the resistor divider network module is connected to the VDD port, the first output terminal of the resistor divider network module is connected to the second input terminal of the boost start-up and shutdown point selection module; the second output terminal of the resistor divider network module is connected The second input terminal of the IC start point selection module;
升压启动与关断点选择模块的第三输入端与N型沟道MOS管M3的漏极以及 P型沟道MOS管M5的漏极相连；升压启动与关断点选择模块的输出端与振荡器模块的第一输入端相连；The third input terminal of the boost start-up and shutdown point selection module is connected to the drain of the N-channel MOS transistor M3 and the drain of the P-channel MOS transistor M5; the output end of the boost startup and shutdown point selection module Connected to the first input of the oscillator module;
IC启动点选择模块的第三输入端连接N型沟道MOS管M3的漏极以及P型沟道MOS管M5的漏极；IC启动点选择模块的输出端连接振荡器模块的第二输入端；The third input terminal of the IC start point selection module is connected to the drain of the N-channel MOS tube M3 and the drain of the P-channel MOS tube M5; the output terminal of the IC start point selection module is connected to the second input terminal of the oscillator module ;
振荡器模块的输出端与驱动模块的输入端相连；The output end of the oscillator module is connected to the input end of the drive module;
驱动模块的输出端与N型沟道功率MOS管M1的栅极相连；The output end of the driving module is connected to the gate of the N-channel power MOS tube M1;
N型沟道功率MOS管M1的漏极和N型沟道MOS管M4的漏极分别连接BOS端口，MOS管M4的源极和MOS管M2的漏极分别连接MOS管M3的栅极，MOS管M3的漏极连接MOS管M5的漏极；MOS管M1、M2和M3的源极都与控制器IC的内部参考地VSS连接；所有的P沟道MOS管和N沟道MOS管的衬底都与各自的源极连接。The drain of the N-channel power MOS tube M1 and the drain of the N-channel MOS tube M4 are respectively connected to the BOS port, the source of the MOS tube M4 and the drain of the MOS tube M2 are respectively connected to the gate of the MOS tube M3, The drain of the tube M3 is connected to the drain of the MOS tube M5; the sources of the MOS tubes M1, M2 and M3 are connected to the internal reference ground VSS of the controller IC; all the P-channel MOS tubes and N-channel MOS tubes are lined The bottoms are connected to their respective sources.
各模块、MOS管的功能或工作原理如下：The function or working principle of each module and MOS tube is as follows:
内部电源与基准模块：将控制器的VDD端口电压转换成内部所需的低压电源VCC，用于IC内部所有低压模块供电；并产生升压启动与关断点选择模块所需要的基准电压Vref1和IC启动点选择模块所需要的基准电压Vref2；并产生两个偏置电压VBN和VBP，分别作为MOS管M2的栅极偏置电压和MOS管M5的栅极偏置电压，使其偏置在正常工作区；Internal power supply and reference module: convert the VDD port voltage of the controller into the low-voltage power supply VCC required internally for all low-voltage modules in the IC; and generate the reference voltage Vref1 and the reference voltage required by the boost start-up and shutdown point selection module The reference voltage Vref2 required by the IC start point selection module; and generates two bias voltages VBN and VBP, which are respectively used as the gate bias voltage of the MOS transistor M2 and the gate bias voltage of the MOS transistor M5, so that they are biased at Normal work area
电阻分压网络模块：将控制器的VDD端口电压通过电阻分压网络转换成升压启动与关断点选择模块所需要的输入电压VDD1以及IC启动点选择模块所需要的输入电压VDD2；可见，VDD1和VDD2的电压大小都可以反映控制器的VDD端口电压；Resistor voltage divider network module: converts the VDD port voltage of the controller through the resistor divider network into the input voltage VDD1 required by the boost startup and shutdown point selection module and the input voltage VDD2 required by the IC startup point selection module; visible, Both VDD1 and VDD2 voltage levels can reflect the VDD port voltage of the controller;
升压启动与关断点选择模块：通过将第一输入电压Vref1和第二输入电压VDD1进行比较，用于设置升压功能的启动点和关断点，其输出电压ENP_BT信号为高电平时，表示启动升压功能，其为低电平时，表示关断升压功能；一升压启动与关断点选择模块在第三输入信号Boost_L为低电平时，表示升压功能有效，在Boost_L为高电平时，表示升压功能无效；Boost startup and shutdown point selection module: By comparing the first input voltage Vref1 and the second input voltage VDD1, it is used to set the startup point and shutdown point of the boost function. When the output voltage ENP_BT signal is high, It means start boost function, when it is low level, it means turn off boost function; a boost start and shut-off point selection module, when the third input signal Boost_L is low level, it means boost function is valid, when Boost_L is high At level, it means the boost function is invalid;
IC启动点与选择模块：通过将第一输入信号Vref2和第二输入信号VDD2进行比较，用于在第三输入信号Boost_L为低电平时，即实现升压功能的情况 下，选择的IC启动点较高；在Boost_L为高电平时，即升压功能无效时，选择的IC启动点较低；一IC启动点与选择模块，其输出端ENP信号为高电平时，表示IC正常工作，其为低电平时，表示IC不工作；IC start point and selection module: By comparing the first input signal Vref2 and the second input signal VDD2, it is used to select the IC start point when the third input signal Boost_L is low, that is, in the case of realizing the boost function High; when Boost_L is high, that is, when the boost function is invalid, the selected IC start point is low; an IC start point and the selection module, when the output ENP signal is high, it means that the IC is working normally, which is When the level is low, it means that the IC does not work;
振荡器模块：用于产生升压功能所需要的高频时钟信号CLK；振荡器模块只有在第一输入信号ENP_BT和第二输入信号ENP都为高电平时，才输出高频时钟信号CLK，否则输出CLK信号为低电平；Oscillator module: used to generate the high-frequency clock signal CLK required for the boost function; the oscillator module outputs the high-frequency clock signal CLK only when the first input signal ENP_BT and the second input signal ENP are high level, otherwise The output CLK signal is low level;
驱动模块：用于将输入高频时钟信号CLK转换成MOS管M1的栅极驱动信号DRV，提高了驱动能力；Drive module: used to convert the input high-frequency clock signal CLK into the gate drive signal DRV of the MOS tube M1, which improves the drive capability;
N型沟道功率MOS管M1：用于和控制器外部的电感L1、二极管D1、控制器的VDD端口、以及旁路电容CVDD一起构成升压拓扑，当功率MOS管M1的栅极驱动信号DRV为高电平时，M1管开启，电感L1储能；当功率MOS管M1的栅极驱动信号DRV为低电平时，电感L1存储的能量通过整流二极管D1传递给VDD端口的旁路电容CVDD，使其充电，VDD端口电压上升；N-channel power MOS tube M1: used to form a boost topology with the external inductor L1, diode D1, VDD port of the controller, and bypass capacitor CVDD, when the gate drive signal DRV of the power MOS tube M1 When it is high, the M1 tube is turned on and the inductor L1 stores energy; when the gate drive signal DRV of the power MOS tube M1 is low, the energy stored in the inductor L1 is transferred to the bypass capacitor CVDD of the VDD port through the rectifier diode D1, so that During charging, the VDD port voltage rises;
N型沟道MOS管M4：用于将BOS端口电压转换成控制器内部所需的电压信号BOS1，由于MOS管M4的栅极接低压电源VCC，所以使电压信号BOS1的最大电压被钳位在VCC-VTH(MOS管M4的导通阈值)，这样与BOS1相连的管子M2和M3都可以用低压管来实现，节省面积；N-channel MOS tube M4: used to convert the voltage of the BOS port into the voltage signal BOS1 required by the controller. Since the gate of the MOS tube M4 is connected to the low-voltage power supply VCC, the maximum voltage of the voltage signal BOS1 is clamped at VCC-VTH (the conduction threshold of MOS tube M4), so that the tubes M2 and M3 connected to BOS1 can be realized with low-voltage tubes, saving area;
N型沟道MOS管M2：用于判断控制器的BOS端口是否悬空，如果控制器的BOS端口悬空，那么MOS管M2的偏置电压VBN会使其导通，将电压信号BOS1电位拉到地电位；N-channel MOS tube M2: used to judge whether the BOS port of the controller is floating, if the BOS port of the controller is floating, the bias voltage VBN of the MOS tube M2 will make it conductive, pulling the voltage signal BOS1 potential to ground Potential
N型沟道MOS管M3和P型沟道MOS管M5，这两个管子配合作用产生升压功能有效与否信号Boost_L；如果BOS端口悬空或者接地电位，这样N型沟道MOS管M3的栅极信号就是地电位，MOS管M3不导通，其漏极电位被P型沟道MOS管M5的导通拉成高电位，使输出信号Boost_L为高电平，升压功能无效；如果BOS端口通过电感L1接到输入信号VIN，VIN上电，BOS端口将VIN电位通过MOS管M4转换成BOS1信号，当VIN电位大于MOS管M3的导通阈值后，MOS管M3导通，当M3导通后的抽电流大于通过MOS管M5的灌电流时，其输出信号Boost_L为低电平，升压功能有效。N-channel MOS tube M3 and P-channel MOS tube M5, these two tubes cooperate to produce the boost function effective signal Boost_L; if the BOS port is suspended or grounded, then the gate of N-channel MOS tube M3 The pole signal is the ground potential, the MOS tube M3 is not turned on, and its drain potential is pulled to a high potential by the conduction of the P-channel MOS tube M5, making the output signal Boost_L high, the boost function is invalid; if the BOS port After receiving the input signal VIN through the inductor L1, VIN is powered on, and the BOS port converts the VIN potential to the BOS1 signal through the MOS tube M4. When the VIN potential is greater than the conduction threshold of the MOS tube M3, the MOS tube M3 is turned on and when M3 is turned on When the drawn current is greater than the sink current through the MOS tube M5, its output signal Boost_L is low, and the boost function is effective.
实施例一Example one
图4为本发明在光耦反馈反激电源的应用场景中的电路简化图，省略了副边光耦与TL431及环路补偿部分。本发明所述一种控制器IC为控制器10中的电路，控制器10中其他电路与本发明无关，在此不展开描述。图4中主功率拓扑为公知技术，包括输入电压V IN、输出电压V OUT、电容C VIN、C VDD和C OUT，控制器10、主功率变压器、辅助绕组Ns2、主功率管M1、二极管D 1、D 2和D OUT、电感L 1和采样电阻R CS等器件组成。GT引脚是控制器10的驱动输出，用于控制功率管M1的开启和关断；VDD引脚是控制器10的电源输入引脚，用于控制器的供电；VSS引脚是控制器10的接地引脚，外接地电位；BOS引脚是控制器10的升压功能引脚，通过外接电感L1和二极管D1，结合本发明控制器10中的电路，实现升压功能，解决宽范围输入在V IN电压比较低的时候不能满足控制器10的供电需求问题。图4所示的控制器的其它引脚连接关系和功能与本发明无关，图4并未标示出。 FIG. 4 is a simplified circuit diagram of the present invention in an application scenario of an optocoupler feedback flyback power supply, omitting the secondary side optocoupler, the TL431, and the loop compensation part. The controller IC of the present invention is a circuit in the controller 10, and other circuits in the controller 10 are irrelevant to the present invention and will not be described here. The main power topology in FIG. 4 is a well-known technology, including input voltage V IN , output voltage V OUT , capacitors C VIN , C VDD, and C OUT , controller 10, main power transformer, auxiliary winding Ns2, main power tube M1, diode D 1 , D 2 and D OUT , inductor L 1 and sampling resistor R CS and other components. The GT pin is the drive output of the controller 10 and is used to control the power tube M1 to turn on and off; the VDD pin is the power input pin of the controller 10 and is used for power supply of the controller; the VSS pin is the controller 10 The ground pin of the external ground potential; the BOS pin is the boost function pin of the controller 10, through the external inductance L1 and the diode D1, combined with the circuit in the controller 10 of the present invention, to achieve the boost function and solve the wide range of input When the V IN voltage is relatively low, the power supply demand of the controller 10 cannot be met. The other pin connection relationships and functions of the controller shown in FIG. 4 are not related to the present invention, and FIG. 4 is not marked.
如图5所示，为本发明控制器IC应用于开关电源第一实施例的电路原理图，一种控制器IC具有升压功能的电路，包括控制器的BOS端、控制器的VDD端、控制器的VSS端、内部电源与基准、电阻分压网络、升压启动与关断点选择、IC启动点选择、振荡器、驱动、N型沟道MOS管M1、N型沟道MOS管M2、N型沟道MOS管M3、N型沟道MOS管M4、P型沟道MOS管M5、BOS端口外接电感L 1和二极管D 1、VDD端口外接旁路电容C VDD。 As shown in FIG. 5, it is a circuit schematic diagram of the first embodiment of the controller IC of the present invention applied to a switching power supply. A controller IC has a boost function circuit, including a BOS terminal of a controller, a VDD terminal of a controller, Controller's VSS terminal, internal power supply and reference, resistor divider network, boost startup and shutdown point selection, IC startup point selection, oscillator, drive, N-channel MOS transistor M1, N-channel MOS transistor M2 , N-channel MOS tube M3, N-channel MOS tube M4, P-channel MOS tube M5, BOS port external inductance L 1 and diode D 1 , VDD port external bypass capacitor C VDD .
内部电源与基准，其输入端与控制器的VDD端相连，其第一输出端V ref1与升压启动与关断点选择模块的第一输入端相连，其第二输出端V ref2与IC启动点选择模块的第一输入端相连，其第三输出端VCC与N型沟道MOS管M4的栅极和P型沟道MOS管M5的源极相连，其第四输出端V BN与N型沟道MOS管M2的栅极相连，其第五输出端V BP与P型沟道MOS管M5的栅极相连； The internal power supply is connected to the reference, its input terminal is connected to the VDD terminal of the controller, its first output terminal V ref1 is connected to the first input terminal of the boost start-up and shutdown point selection module, and its second output terminal V ref2 is connected to the IC The first input terminal of the point selection module is connected, the third output terminal VCC is connected to the gate of the N-channel MOS transistor M4 and the source of the P-channel MOS tube M5, and the fourth output terminal V BN is connected to the N-type The gate of the channel MOS tube M2 is connected, and the fifth output terminal V BP is connected to the gate of the P-channel MOS tube M5;
电阻分压网络，其输入端与控制器的VDD端口相连，其第一输出端V DD1与升压启动与关断点选择模块的第二输入端相连，其第二输出端V DD2与IC启动点选择模块的第二输入端相连； Resistor voltage divider network, its input terminal is connected to the VDD port of the controller, its first output terminal V DD1 is connected to the second input terminal of the boost start and shutdown point selection module, and its second output terminal V DD2 is connected to the IC The second input terminal of the point selection module is connected;
升压启动与关断点选择，其第三输入端Boost_L与N型沟道MOS管M3的漏极以及P型沟道MOS管M5的漏极相连，其输出端ENP_BT与振荡器模块的第一输入端相连；Boost start-up and shutdown point selection, its third input Boost_L is connected to the drain of the N-channel MOS transistor M3 and the drain of the P-channel MOS transistor M5, and its output ENP_BT is connected to the first of the oscillator module The input is connected;
IC启动点选择，其第三输入端Boost_L与N型沟道MOS管M3的漏极以及P型沟道MOS管M5的漏极相连，其输出端ENP与振荡器模块的第二输入端相连；IC start point selection, its third input terminal Boost_L is connected to the drain of the N-channel MOS tube M3 and the drain of the P-channel MOS tube M5, and its output terminal ENP is connected to the second input terminal of the oscillator module;
振荡器，其输出端CLK与驱动模块的输入端相连；Oscillator, its output terminal CLK is connected to the input terminal of the drive module;
驱动，其输出端DRV与N型沟道MOS管M1的栅极相连；Drive, the output terminal DRV is connected to the gate of the N-channel MOS transistor M1;
N型沟道MOS管M1，其漏极与N型沟道MOS管M4的漏极以及BOS端口相连；The drain of the N-channel MOS tube M1 is connected to the drain of the N-channel MOS tube M4 and the BOS port;
控制器的BOS端口，外部与电感L 1的一端及二极管D1的阳极相连； The BOS port of the controller is externally connected to one end of the inductor L 1 and the anode of the diode D1;
电感L 1的另一端与输入电压V IN相连； The other end of the inductor L 1 is connected to the input voltage V IN ;
二极管D 1，其阴极与控制器的VDD端口以及旁路电容C VDD的一端相连，旁路电容C VDD的另一端接地； The diode D 1, VDD port bypass capacitor C VDD and one end of which a cathode is connected to the controller, the other end of the bypass capacitor C VDD;
N型沟道MOS管M4，其源极和N型沟道MOS管M2的漏极以及N型沟道MOS管M3的栅极相连，作为信号BOS1；The source of the N-channel MOS tube M4 is connected to the drain of the N-channel MOS tube M2 and the gate of the N-channel MOS tube M3 as the signal BOS1;
N型沟道MOS管M3，其漏极与P型沟道MOS管M5的漏极相连，作为输出信号Boost_L；The drain of the N-channel MOS transistor M3 is connected to the drain of the P-channel MOS transistor M5 as the output signal Boost_L;
N型沟道MOS管M1、M2和M3的源极都与控制器IC的内部参考地VSS连接，并连接到控制器的VSS端口；The sources of the N-channel MOS transistors M1, M2 and M3 are all connected to the internal reference ground VSS of the controller IC and to the VSS port of the controller;
所有的P型沟道MOS管和N型沟道MOS管的衬底都与各自的源极连接。The substrates of all P-channel MOS transistors and N-channel MOS transistors are connected to their respective sources.
本实施例的基本工作原理：The basic working principle of this embodiment:
控制器的BOS端口通过与内部功率MOS管M1、控制器外部的电感L 1、二极管D 1、控制器的VDD端口、以及旁路电容C VDD一起构成升压拓扑，BOS端口通过电感L 1接到输入信号V IN，V IN上电，电感L 1通直隔交，BOS端口将V IN电位通过MOS管M4转换成BOS1信号，当BOS1信号电压大于MOS管M3的导通阈值后，MOS管M3导通，当M3导通后的抽电流大于通过MOS管M5的灌电流时，其输出信号Boost_L为低电平，升压功能有效。 The BOS port of the controller forms a boost topology with the internal power MOS tube M1, the inductor L 1 outside the controller, the diode D 1 , the VDD port of the controller, and the bypass capacitor C VDD . The BOS port is connected through the inductor L 1 When the input signals V IN and V IN are powered up, the inductor L 1 is cut through, and the BOS port converts the V IN potential to the BOS1 signal through the MOS tube M4. When the BOS1 signal voltage is greater than the conduction threshold of the MOS tube M3, the MOS tube M3 is turned on. When the pumping current after M3 is turned on is greater than the sink current through the MOS tube M5, its output signal Boost_L is low level, and the boost function is effective.
此时，Boost_L信号输入到升压启动与关断点选择模块中，使其输出信号ENP_BT变成高电平，同时Boost_L信号输入到IC启动点选择模块中，使其输出信号ENP也变成高电平，这两个信号输入到振荡器模块中，使振荡器开始工作，输出高频时钟信号CLK，CLK信号再输入到驱动模块中，产生同步的驱动信号DRV，作为功率MOS管M1的栅极驱动信号。At this time, the Boost_L signal is input into the boost startup and shutdown point selection module, so that its output signal ENP_BT becomes a high level, and the Boost_L signal is input into the IC startup point selection module, so that its output signal ENP also becomes high Level, these two signals are input into the oscillator module, the oscillator starts to work, output a high-frequency clock signal CLK, the CLK signal is then input into the drive module, and a synchronous drive signal DRV is generated as the gate of the power MOS tube M1 Pole drive signal.
当功率MOS管M1的栅极驱动信号DRV为高电平时，M1管开启，电感L1储 能；当功率MOS管M1的栅极驱动信号DRV为低电平时，电感L1存储的能量通过整流二极管D1传递给VDD端口的旁路电容C VDD，使其充电，VDD端口电压上升，实现升压功能。 When the gate drive signal DRV of the power MOS tube M1 is high, the M1 tube is turned on, and the inductor L1 stores energy; when the gate drive signal DRV of the power MOS tube M1 is low, the energy stored in the inductor L1 passes through the rectifier diode D1 The bypass capacitor C VDD passed to the VDD port charges it, and the voltage at the VDD port rises to realize the boost function.
升压功能有效，表示根据客户需求，当输入电压V IN较低，需要通过升压，使控制器的VDD端口电压满足控制器IC的供电需求。 The boost function is effective, which means that according to customer needs, when the input voltage V IN is low, it is necessary to boost the controller's VDD port voltage to meet the power supply requirements of the controller IC.
当控制器的VDD端口电压达到控制器IC的启动点后，无需再升压，此时升压启动与关断点选择模块输出信号ENP_BT变成低电平，使振荡器不工作，进而使功率MOS管M1不开启。When the voltage of the VDD port of the controller reaches the starting point of the controller IC, there is no need to boost again. At this time, the output signal ENP_BT of the step-up start-up and shut-off point selection module becomes low level, so that the oscillator does not work, and then the power MOS tube M1 does not turn on.
实施例二Example 2
如图6所示，与实施例一相比，区别在于控制器的BOS端外部与地相连，不实现升压功能。As shown in FIG. 6, compared with the first embodiment, the difference is that the BOS terminal of the controller is externally connected to the ground and does not implement the boost function.
本实施例的基本工作原理：The basic working principle of this embodiment:
如图6所示，控制器的BOS端口接地电位，这样N型沟道MOS管M3的栅极信号就是地电位，MOS管M3不导通，其漏极电位被P型沟道MOS管M5的导通拉成高电位，使输出信号Boost_L为高电平，表示升压功能无效。As shown in FIG. 6, the BOS port of the controller is connected to the ground potential, so that the gate signal of the N-channel MOS transistor M3 is the ground potential, the MOS transistor M3 is not turned on, and its drain potential is controlled by Turn on to pull it to a high potential, making the output signal Boost_L high, indicating that the boost function is invalid.
此时，Boost_L信号输入到升压启动与关断点选择模块中，使其输出信号ENP_BT变成低电平，使能无效；同时Boost_L信号输入到IC启动点选择模块中，使其输出信号ENP也变成低电平，使能无效；这两个信号输入到振荡器模块中，使振荡器不工作，输出信号CLK一直为低电平，CLK信号再输入到驱动模块中，使驱动信号DRV也一直为低电平，功率MOS管M1一直不开启，升压功能无效。At this time, the Boost_L signal is input into the boost startup and shutdown point selection module, so that its output signal ENP_BT becomes low level, and the enable is invalid; at the same time, the Boost_L signal is input into the IC startup point selection module, so that its output signal ENP It also becomes a low level, and the enable is invalid; these two signals are input into the oscillator module, so that the oscillator does not work, the output signal CLK is always low, and the CLK signal is then input into the drive module to make the drive signal DRV It has also been low level, the power MOS tube M1 has not been turned on, the boost function is invalid.
升压功能无效，表示根据客户需求，控制器IC不需要实现升压功能，输入电压V IN可以满足控制器IC的VDD端口的供电需求，所以IC启动点选择和升压启动与关断点选择模块输出都为无效电平。 The boost function is invalid, which means that the controller IC does not need to implement the boost function according to customer needs. The input voltage V IN can meet the power supply requirements of the VDD port of the controller IC, so the IC startup point selection and boost startup and shutdown point selection The module output is at an invalid level.
需要说明的是：本发明涉及的是控制器IC电路架构的申请，其中使用到了多个基本功能电路单元模块，这些电路单元模块的构成及其基本功能都是所属技术领域的技术人员所熟知的，所属技术领域的技术人员只需知晓由基本功能电路单元所构成的整体电路架构以及完整的信号流向即可不花费创造性劳动实施该电路架构的技术方案，即便说明书中未对基本功能电路单元模块作详尽的 记载，也不能认为说明书中针对该部分的公开是不充分的。至于各电路单元及其中相应的参数如何设定，则属于在保证整体电路功能的条件下，可以由本领域的技术人员根据具体情况的需要作出具体选择的情形，这些都是所属技术领域的技术人员可以理解并能够实现的。It should be noted that the present invention relates to an application for a controller IC circuit architecture, in which a plurality of basic functional circuit unit modules are used, and the composition and basic functions of these circuit unit modules are well known to those skilled in the art , Those skilled in the art only need to know the overall circuit architecture composed of basic functional circuit units and the complete signal flow to implement the technical solution of the circuit architecture without any creative effort, even if the basic functional circuit unit modules are not described in the specification For a detailed record, the disclosure of this part in the specification cannot be considered insufficient. As for how to set each circuit unit and its corresponding parameters, it belongs to a situation where a person skilled in the art can make a specific choice according to the needs of a specific situation under the condition of ensuring the overall circuit function. Understandable and achievable.
本发明的实施方式不限于此，按照本发明的上述内容，利用本领域的普通技术知识和惯用手段，在不脱离本发明上述基本技术思想前提下，本发明还可以做出其它多种形式的修改、替换或变更，均落在本发明权利保护范围之内。The embodiments of the present invention are not limited to this. According to the above content of the present invention, using common technical knowledge and conventional means in the art, the present invention can also be made in many other forms without departing from the above basic technical idea of the present invention. Modifications, replacements, or alterations all fall within the protection scope of the present invention.

Claims (4)

  1. 一种控制器IC，所述控制器IC引脚包括BOS端、VDD端和VSS端，所述VDD端连接外部电压，给所述控制器IC内部电路供电；所述VSS端为所述控制器IC的地引脚，连接外部地电位；其特征在于：所述控制器IC内部集成了开关电源用于实现升压功能的主功率开关管M1且自带升压功能，所述控制器IC内部包括升压启动与关断点选择模块，所述升压启动与关断点选择模块能实现当所述BOS端连接外部器件时所述控制器IC具有升压功能，当所述BOS端接地时所述控制器IC无升压功能。A controller IC, the controller IC pin includes a BOS terminal, a VDD terminal, and a VSS terminal, the VDD terminal is connected to an external voltage, and supplies power to the internal circuit of the controller IC; the VSS terminal is the controller The ground pin of the IC is connected to an external ground potential; it is characterized in that the controller IC internally integrates a main power switch M1 for realizing the boost function and has a boost function, and the controller IC has Including a boost start and shut-off point selection module, the boost start and shut-off point selection module can realize that the controller IC has a boost function when the BOS terminal is connected to an external device, and when the BOS terminal is grounded The controller IC has no boost function.
  2. 根据权利要求1所述控制器IC，其特征在于：控制器IC内部还包括：内部电源与基准模块、电阻分压网络模块、IC启动点选择模块、振荡器模块、驱动模块、N型沟道MOS管M2、N型沟道MOS管M3、N型沟道MOS管M4和P型沟道MOS管M5；The controller IC according to claim 1, wherein the controller IC further includes: an internal power supply and reference module, a resistor voltage divider network module, an IC start point selection module, an oscillator module, a drive module, an N-type channel MOS tube M2, N-channel MOS tube M3, N-channel MOS tube M4 and P-channel MOS tube M5;
    所述内部电源与基准模块的输入端与所述VDD端相连，所述内部电源与基准模块的第一输出端连接所述升压启动与关断点选择模块的第一输入端；所述内部电源与基准模块的第二输出端连接所述IC启动点选择模块的第一输入端；所述内部电源与基准模块的第三输出端连接所述N型沟道MOS管M4的栅极和所述P型沟道MOS管M5的源极；所述内部电源与基准模块的第四输出端连接所述N型沟道MOS管M2的栅极；所述内部电源与基准模块的第五输出端连接所述P型沟道MOS管M5的栅极；The internal power supply and the input terminal of the reference module are connected to the VDD terminal, and the internal power supply and the first output terminal of the reference module are connected to the first input terminal of the boost startup and shutdown point selection module; the internal The second output terminal of the power supply and the reference module is connected to the first input terminal of the IC start point selection module; the third output terminal of the internal power supply and the reference module is connected to the gate of the N-channel MOS transistor M4 and the The source of the P-channel MOS transistor M5; the internal power supply and the fourth output terminal of the reference module are connected to the gate of the N-channel MOS transistor M2; the internal power supply and the fifth output terminal of the reference module Connect the gate of the P-channel MOS tube M5;
    所述电阻分压网络模块的输入端与所述VDD端口相连，所述电阻分压网络模块的第一输出端连接所述升压启动与关断点选择模块的第二输入端；所述电阻分压网络模块的第二输出端连接所述IC启动点选择模块的第二输入端；The input terminal of the resistor-divider network module is connected to the VDD port, and the first output terminal of the resistor-divider network module is connected to the second input terminal of the boost startup and shutdown point selection module; the resistor The second output terminal of the voltage division network module is connected to the second input terminal of the IC start point selection module;
    所述升压启动与关断点选择模块的第三输入端与所述N型沟道MOS管M3的漏极以及所述P型沟道MOS管M5的漏极相连；所述升压启动与关断点选择模块的输出端与所述振荡器模块的第一输入端相连；The third input terminal of the boost startup and shutdown point selection module is connected to the drain of the N-channel MOS tube M3 and the drain of the P-channel MOS tube M5; The output terminal of the shutdown point selection module is connected to the first input terminal of the oscillator module;
    所述IC启动点选择模块的第三输入端连接所述N型沟道MOS管M3的漏极以及所述P型沟道MOS管M5的漏极；所述IC启动点选择模块的输出端连接所述振荡器模块的第二输入端；The third input terminal of the IC start point selection module is connected to the drain of the N-channel MOS tube M3 and the drain of the P-channel MOS tube M5; the output end of the IC start point selection module is connected The second input terminal of the oscillator module;
    所述振荡器模块的输出端与所述驱动模块的输入端相连；The output end of the oscillator module is connected to the input end of the drive module;
    所述驱动模块的输出端与所述N型沟道功率MOS管M1的栅极相连；The output end of the driving module is connected to the gate of the N-channel power MOS tube M1;
    所述N型沟道功率MOS管M1的漏极和所述N型沟道MOS管M4的漏极分别连接所述BOS端口，所述MOS管M4的源极和所述MOS管M2的漏极分别连接所述MOS管M3的栅极，所述MOS管M3的漏极连接所述MOS管M5的漏极；所述MOS管M1、M2和M3的源极都与控制器IC的内部参考地VSS连接；所有的P沟道MOS管和N沟道MOS管的衬底都与各自的源极连接；The drain of the N-channel power MOS tube M1 and the drain of the N-channel power MOS tube M4 are respectively connected to the BOS port, the source of the MOS tube M4 and the drain of the MOS tube M2 Connect the gate of the MOS tube M3 respectively, the drain of the MOS tube M3 is connected to the drain of the MOS tube M5; the sources of the MOS tubes M1, M2 and M3 are all connected to the internal reference ground of the controller IC VSS connection; the substrates of all P-channel MOS tubes and N-channel MOS tubes are connected to their respective sources;
    所述内部电源与基准模块，是将控制器的VDD端口电压转换成内部所需的低压电源VCC，用于IC内部所有低压模块供电；并产生所述升压启动与关断点选择模块所需要的基准电压Vref1和所述IC启动点选择模块所需要的基准电压Vref2；并产生两个偏置电压VBN和VBP，分别作为MOS管M2的栅极偏置电压和MOS管M5的栅极偏置电压，使其偏置在正常工作区；The internal power supply and reference module are used to convert the voltage of the VDD port of the controller into the low-voltage power supply VCC required internally for the power supply of all low-voltage modules inside the IC; and to generate the boost start-up and shutdown point selection module Reference voltage Vref1 and the reference voltage Vref2 required by the IC start point selection module; and generates two bias voltages VBN and VBP, respectively as the gate bias voltage of the MOS transistor M2 and the gate bias of the MOS transistor M5 Voltage to bias it in the normal working area;
    所述电阻分压网络模块，是将控制器的VDD端口电压通过电阻分压网络转换成所述升压启动与关断点选择模块所需要的输入电压VDD1以及所述IC启动点选择模块所需要的输入电压VDD2；The resistor divider network module converts the VDD port voltage of the controller into the input voltage VDD1 required by the boost startup and shutdown point selection module and the IC startup point selection module through the resistor divider network Input voltage VDD2;
    所述升压启动与关断点选择模块，是通过将第一输入电压Vref1和第二输入电压VDD1进行比较，用于设置升压功能的启动点和关断点，其输出电压ENP_BT信号为高电平时，表示启动升压功能，其为低电平时，表示关断升压功能；所述升压启动与关断点选择模块在第三输入信号Boost_L为低电平时，表示升压功能有效，在Boost_L为高电平时，表示升压功能无效；The boost start-up and shutdown point selection module is used to set the startup point and shutdown point of the boost function by comparing the first input voltage Vref1 and the second input voltage VDD1, and the output voltage ENP_BT signal is high When the level is high, it means that the boost function is started, and when it is low, it means that the boost function is turned off; when the third input signal Boost_L is low, the boost start and shutdown point selection module means that the boost function is valid, When Boost_L is high, it means that the boost function is invalid;
    所述IC启动点与选择模块，是通过将第一输入信号Vref2和第二输入信号VDD2进行比较，用于在第三输入信号Boost_L为低电平时，即实现升压功能的情况下，选择的IC启动点较高；在Boost_L为高电平时，即升压功能无效时，选择的IC启动点较低；所述IC启动点与选择模块，其输出端ENP信号为高电平时，表示IC正常工作，其为低电平时，表示IC不工作；The IC start point and the selection module are selected by comparing the first input signal Vref2 and the second input signal VDD2 when the third input signal Boost_L is at a low level, that is, when the boost function is realized The IC start point is high; when Boost_L is high, that is, when the boost function is invalid, the selected IC start point is low; the IC start point and the selection module, when the output end ENP signal is high, indicating that the IC is normal Working, when it is low, it means the IC is not working;
    所述振荡器模块，用于产生升压功能所需要的高频时钟信号CLK；所述振荡器模块只有在第一输入信号ENP_BT和第二输入信号ENP都为高电平时，才输出高频时钟信号CLK，否则输出CLK信号为低电平；The oscillator module is used to generate a high-frequency clock signal CLK required for the boost function; the oscillator module outputs a high-frequency clock only when the first input signal ENP_BT and the second input signal ENP are both high level Signal CLK, otherwise the output CLK signal is low level;
    所述驱动模块，用于将输入高频时钟信号CLK转换成MOS管M1的栅极驱动信号DRV。The driving module is used to convert the input high-frequency clock signal CLK into the gate driving signal DRV of the MOS transistor M1.
  3. 权利要求1或2所述控制器IC在开关电源中的应用，其特征在于：所述BOS端口连接所述开关电源的外围升压电路中二极管D1的阳极，所述VDD端口连接所述二极管D1的阴极，实现所述控制器IC的升压功能。The application of the controller IC of claim 1 or 2 in a switching power supply, characterized in that: the BOS port is connected to the anode of a diode D1 in a peripheral boost circuit of the switching power supply, and the VDD port is connected to the diode D1 The cathode of the controller realizes the boost function of the controller IC.
  4. 权利要求1或2所述控制器IC在开关电源中的应用，其特征在于：所述BOS端口外部接地，不实现所述控制器IC的升压功能。The application of the controller IC of claim 1 or 2 in a switching power supply, characterized in that the BOS port is externally grounded and does not implement the boost function of the controller IC.
PCT/CN2019/084989 2018-10-23 2019-04-29 Controller ic and use thereof WO2020082713A1 (en)

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CN109217679B (en) * 2018-10-23 2020-03-20 深圳南云微电子有限公司 Controller IC and application thereof
CN114070015B (en) * 2020-08-05 2023-09-15 上海南芯半导体科技股份有限公司 Driving control method and driving system of power device
CN112866837B (en) * 2020-12-31 2021-10-26 广州芯德通信科技股份有限公司 Network port radiation suppression circuit for OLT equipment and design method

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CN109217679A (en) * 2018-10-23 2019-01-15 深圳南云微电子有限公司 A kind of controller IC and its application
CN209016936U (en) * 2018-10-23 2019-06-21 深圳南云微电子有限公司 A kind of controller IC and its application

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CN103762837A (en) * 2013-11-05 2014-04-30 苏州贝克微电子有限公司 Soft-starting switching regulator
CN109217679A (en) * 2018-10-23 2019-01-15 深圳南云微电子有限公司 A kind of controller IC and its application
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