WO2020082713A1 - Ci de dispositif de commande et son utilisation - Google Patents

Ci de dispositif de commande et son utilisation Download PDF

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Publication number
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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WIPO (PCT)
Prior art keywords
boost
module
controller
mos tube
voltage
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PCT/CN2019/084989
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English (en)
Chinese (zh)
Inventor
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/fr

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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

Definitions

  • the invention relates to a controller IC, in particular to a controller IC of a switching power supply converter.
  • 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.
  • 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.
  • 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 .
  • the output VDD voltage rises.
  • 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 .
  • 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.
  • FIG. 2 it is also a simplified diagram of an application circuit for realizing a wide range of input in the prior art.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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;
  • 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;
  • 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;
  • 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;
  • 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;
  • the output end of the oscillator module is connected to the input end of the drive module
  • the output end of the driving module is connected to the gate of the N-channel power MOS tube M1;
  • 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;
  • 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;
  • 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 ;
  • 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;
  • 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;
  • 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;
  • 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.
  • the invention also provides the application scheme of the above controller IC in the switching power supply, as follows:
  • 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.
  • Application scheme 2 The BOS port is externally grounded, and the boosting function of the controller IC is not realized.
  • 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.
  • 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.
  • 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.
  • FIG. 1 is a simplified diagram of a system application circuit 1 for realizing a wide-range input in the prior art
  • Figure 2 is a simplified diagram of the circuit 2 of the prior art system that realizes a wide range of input
  • FIG. 3 is a block diagram of the controller IC circuit of the present invention.
  • FIG. 4 is a simplified circuit diagram of the present invention in an application scenario of a photocoupler feedback flyback switching power supply
  • FIG. 5 is a circuit diagram of the first embodiment of the controller IC of the present invention applied to a switching power supply;
  • FIG. 6 is a circuit diagram of a second embodiment of the controller IC of the present invention applied to a switching power supply.
  • 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.
  • 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;
  • 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;
  • 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;
  • 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;
  • 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 ;
  • the output end of the oscillator module is connected to the input end of the drive module
  • the output end of the driving module is connected to the gate of the N-channel power MOS tube M1;
  • 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.
  • 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
  • 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;
  • 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.
  • the output voltage ENP_BT signal 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 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;
  • 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;
  • 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-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-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-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
  • the MOS tube M3 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.
  • 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 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.
  • 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 .
  • 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;
  • 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;
  • 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;
  • the output terminal DRV is connected to the gate of the N-channel MOS transistor M1;
  • 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;
  • the BOS port of the controller is externally connected to one end of the inductor L 1 and the anode of the diode D1;
  • the other end of the inductor L 1 is connected to the input voltage V IN ;
  • 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;
  • 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;
  • 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;
  • the substrates of all P-channel MOS transistors and N-channel MOS transistors are connected to their respective sources.
  • 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.
  • the BOS1 signal voltage is greater than the conduction threshold of the MOS tube M3, the MOS tube M3 is turned on.
  • 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.
  • 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.
  • 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.
  • the difference is that the BOS terminal of the controller is externally connected to the ground and does not implement the boost function.
  • 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.
  • 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.
  • 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.
  • 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
  • the disclosure of this part in the specification cannot be considered insufficient.
  • 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.

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Abstract

La présente invention concerne un CI de dispositif de commande intégré à un tube de puissance M1 et ayant une fonction d'amplification, le CI de dispositif de commande comprenant un module de sélection de point de démarrage et de désactivation d'amplification ; et le module de sélection de point de démarrage et de désactivation d'amplification peut permettre au CI de dispositif de commande d'avoir une fonction d'amplification lorsqu'une extrémité BOS est connectée à un dispositif externe. Lorsque l'extrémité BOS est mise à la terre, le CI de dispositif de commande n'a pas de fonction d'amplification. Selon la présente invention, des exigences de large plage d'entrée sont réalisées simplement au moyen d'un CI de dispositif de commande et simplement à l'aide d'inducteurs et de diodes à la périphérie de la topologie d'amplification, le circuit périphérique est simplifié, la zone de disposition d'une PCB et la taille sont réduites, et le coût est réduit, ce qui permet de répondre aux exigences d'un système d'alimentation électrique de faible densité, de petite taille et de faible coût.
PCT/CN2019/084989 2018-10-23 2019-04-29 Ci de dispositif de commande et son utilisation WO2020082713A1 (fr)

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CN201811239374.3A CN109217679B (zh) 2018-10-23 2018-10-23 一种控制器ic及其应用
CN201811239374.3 2018-10-23

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CN109217679B (zh) * 2018-10-23 2020-03-20 深圳南云微电子有限公司 一种控制器ic及其应用
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CN112866837B (zh) * 2020-12-31 2021-10-26 广州芯德通信科技股份有限公司 一种用于olt设备网口辐射抑制电路及设计方法

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