WO2015049946A1 - 負荷駆動装置、車両用空調装置、及び負荷短絡保護回路 - Google Patents

負荷駆動装置、車両用空調装置、及び負荷短絡保護回路 Download PDF

Info

Publication number
WO2015049946A1
WO2015049946A1 PCT/JP2014/072928 JP2014072928W WO2015049946A1 WO 2015049946 A1 WO2015049946 A1 WO 2015049946A1 JP 2014072928 W JP2014072928 W JP 2014072928W WO 2015049946 A1 WO2015049946 A1 WO 2015049946A1
Authority
WO
WIPO (PCT)
Prior art keywords
resistor
load
voltage
circuit
switching element
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2014/072928
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
圭史 永坂
秀隆 佐藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Heavy Industries Thermal Systems Ltd
Original Assignee
Mitsubishi Heavy Industries Automotive Thermal Systems Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Heavy Industries Automotive Thermal Systems Co Ltd filed Critical Mitsubishi Heavy Industries Automotive Thermal Systems Co Ltd
Priority to CN201480044836.XA priority Critical patent/CN105474544B/zh
Priority to US14/910,195 priority patent/US9923364B2/en
Priority to DE112014004562.4T priority patent/DE112014004562T5/de
Publication of WO2015049946A1 publication Critical patent/WO2015049946A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00—Details of emergency protective circuit arrangements
    • H02H1/0061—Details of emergency protective circuit arrangements concerning transmission of signals
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/04—Modifications for accelerating switching
    • H03K17/0406—Modifications for accelerating switching in composite switches
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
    • H03K17/082—Modifications for protecting switching circuit against overcurrent or overvoltage by feedback from the output to the control circuit
    • H03K17/0828—Modifications for protecting switching circuit against overcurrent or overvoltage by feedback from the output to the control circuit in composite switches
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
    • H03K2217/0027—Measuring means of, e.g. currents through or voltages across the switch

Definitions

  • the present invention relates to, for example, a load driving device that drives a load such as a PTC element, a vehicle air conditioner including the load driving device, and a load short-circuit protection circuit.
  • a positive temperature coefficient thermistor element (hereinafter referred to as “PTC element”) is used as a heat generating element as one of heat sources for heating.
  • PTC element a positive temperature coefficient thermistor element
  • a PTC heater is known (see, for example, Patent Documents 1 and 2).
  • the present invention provides a load driving device capable of improving the response performance of short circuit detection and quickly shutting off power supply to the load when a short circuit occurs, a vehicle air conditioner equipped with the load driving device, and a load short circuit protection circuit. With the goal.
  • a voltage signal for controlling on / off of the first switching element is applied to a first switching element for controlling on / off of current supply to a load and a conduction control terminal of the first switching element.
  • driving means for driving the first switching element voltage output means for converting the current flowing through the load into a voltage and outputting it, and a load short circuit protection circuit, the load short circuit protection circuit,
  • a first resistor provided on a control line connecting the conduction control terminal of the first switching element; and on the drive means side of the first resistor in the control line.
  • a second switching circuit provided on a line connecting the second resistor and the ground between the first resistor and the second resistor and turned on when the output of the comparison means is a high signal.
  • the comparison means determines that it is equal to or higher than the reference voltage.
  • the second switching element is turned on, and the conduction control terminal of the first switching element and the ground are connected via the first resistor.
  • the voltage at the conduction control terminal of the first switching element is lowered, and the first switching element is turned off.
  • the second switching element can be stably turned on during that period. As a result, for example, it is possible to prevent hunting associated with the inversion of the output of the comparison means due to a temporary fluctuation in the current flowing through the load.
  • the voltage output means may include a shunt resistor and a non-inverting amplifier circuit that amplifies and outputs a voltage that appears as a voltage drop in the shunt resistor.
  • the shunt resistor By using the shunt resistor, it is possible to detect the current flowing through the load as a voltage with a simple configuration. Furthermore, signal amplification can be performed quickly by using a non-inverting amplifier circuit. Thereby, the current detection speed can be improved.
  • the holding unit includes a diode connected in a forward direction to the output line of the comparison unit, a capacitor provided between the cathode side of the diode in the output line and the ground, and the capacitor And a resistor connected in parallel with each other.
  • the output signal of the comparison means can be maintained for a predetermined period with a simple configuration.
  • the load driving device detects a short circuit when the output voltage of the voltage output means is equal to or higher than a predetermined reference voltage, and outputs a load cutoff signal for turning off the first switching element to the driving means.
  • the holding means has a longer period than the period from when the short circuit is detected until the first switching element is turned off by the load cutoff signal. preferable.
  • the output of the comparison means can be maintained at a high signal during a period until a short circuit is detected and the first switching element is turned off via the drive means by the load cutoff signal from the arithmetic processing means. .
  • the first switching element can be reliably turned off by the load short-circuit protection circuit until the first switching element is turned off by the arithmetic processing means.
  • the resistance value of the first resistor is preferably set according to an inductance between a power source and the load.
  • the resistance value of the first resistor is related to the charge drawing time of the first switching element. Therefore, by setting the resistance value of the first resistor to an appropriate value according to the peak value and increase rate of the surge voltage and short-circuit current when a short-circuit occurs, element destruction when a short-circuit occurs can be prevented. Is possible.
  • the first resistor and the second resistor are configured by one variable resistor IC, and a voltage dividing ratio is adjusted by a digital command from a microcomputer, whereby the resistance value of the first resistor and the first resistor are adjusted. Two resistance values may be set.
  • a second aspect of the present invention is a vehicle air conditioner including a heater using a PTC element and the load driving device for driving the PTC element.
  • driving means for driving the first switching element by applying a voltage for controlling on / off of the first switching element to the conduction control terminal of the first switching element.
  • Voltage output means for converting the current flowing through the load into voltage and outputting, and arithmetic processing means for detecting a short circuit when the voltage output means exceeds a predetermined reference voltage and outputting an off control signal to the drive means
  • a load short circuit protection circuit applied to a load driving device comprising: a comparison means for detecting a short circuit when the output voltage of the voltage output means is equal to or higher than a predetermined reference voltage and outputting a high signal;
  • a holding means for maintaining a high signal of the comparison means for a predetermined period;
  • a first resistor provided on a control line connecting the driving means and a conduction control terminal of the first switching element;
  • a second resistor provided on the driving means side of the first resistor in the line, and a line connecting the ground between the first resistor and the second resistor and the output of the comparing
  • the present invention it is possible to improve the response performance when a short circuit of a load or the like is detected, and to quickly cut off the power supply to the load. Thereby, element destruction by overcurrent and a surge voltage can be suppressed.
  • FIG. 1 is a schematic configuration diagram of a load driving device according to a first embodiment of the present invention. It is the schematic of the closed circuit which supplies an electric current from a power supply to a PTC element. It is the figure which compared and showed the surge voltage and short circuit current waveform in case the inductance between a power supply and a PTC element is comparatively large, and the surge voltage and short circuit current waveform in case this inductance is comparatively small.
  • FIG. 6 is a diagram showing a comparison between a collector-emitter voltage and a collector current when an active clamp circuit is provided, and a collector-emitter voltage and a collector current when no active clamp circuit is provided. It is the figure which showed one structural example of the load drive device in the case of driving a some PTC element.
  • FIG. 1 is a schematic configuration diagram of a load driving device according to a first embodiment of the present invention.
  • a PTC element of a PTC heater mounted on a vehicle air conditioner will be described as an example of the load, but the load is not particularly limited.
  • the load driving device 1 includes an IGBT (Insulated Gate Bipolar Transistor) 3 that controls on / off of current supply to a PTC element 2 that is a load, and a drive circuit 4 that drives the IGBT 3.
  • IGBT Insulated Gate Bipolar Transistor
  • a control device 5 that controls the drive circuit 4 and a load short-circuit protection circuit 10 are provided as main components.
  • an active clamp circuit 35 including a Zener diode and a diode is provided between the collector and the gate.
  • the surge voltage can be suppressed and the current change rate can be moderated.
  • a broken line indicates a current and voltage waveform when the active clamp circuit 35 is not provided, and a solid line indicates a current and voltage waveform when the active clamp circuit 35 is provided.
  • the drive circuit 4 drives the IGBT 3 by applying a voltage signal for controlling on / off of the IGBT 3 to the gate (conduction control terminal) of the IGBT 3.
  • Other power devices can be used instead of the IGBT 3. Examples of other power devices include FETs (Field-Effect Transistors), MOSFETs (Metal-Oxide-Semiconductor FETs), and the like.
  • the control device 5 is, for example, a microcomputer, and various functions (for example, on / off control of a PTC element and short-circuit protection function) are executed by the CPU reading a program recorded in the auxiliary storage device into the main storage device and executing it. Is realized. For example, a known technique can be employed for on / off control of a normal PTC element.
  • the short-circuit protection function is, for example, a load cutoff for turning off the PTC element 2 with respect to the drive circuit 4 when an input signal for short-circuit detection input to the input terminal A exceeds a predetermined reference voltage. Output a signal.
  • the load short circuit protection circuit 10 includes a voltage output circuit 11, a comparison circuit 12, a holding circuit 13, a first resistor 14, a second resistor 15, and an FET (second switching element) 16 as main components.
  • the voltage output circuit 11 converts the current flowing through the PTC element 2 into a voltage and outputs the voltage.
  • the voltage output circuit 11 includes a shunt resistor 11a and a non-inverting amplifier circuit 11b that amplifies and outputs a voltage that appears as a voltage drop in the shunt resistor 11a.
  • the comparison circuit 12 detects a short circuit and outputs a high signal when the output voltage of the voltage output circuit 11 is equal to or higher than a predetermined reference voltage. For example, when the reference voltage is set to 5V and the output voltage from the voltage output circuit 11 is 5V or higher, the comparison circuit 12 outputs a 5V output signal as a high signal.
  • the holding circuit 13 maintains the high signal of the comparison circuit 12 for a predetermined period.
  • the holding circuit 13 includes a diode 13a connected in the forward direction to the output line 21 of the comparison circuit 12, a capacitor 13b provided between the cathode side of the diode 13a in the output line 21 and the ground, A resistor 13c connected in parallel with the capacitor 13b is provided.
  • the predetermined period is a period longer than the period from when the short circuit is detected by the control device 5 until the drive circuit 4 operates and the IGBT 3 is turned off, and the time of the holding circuit 13 according to the predetermined period. Constants, that is, the capacitance of the capacitor 13b and the resistance value of the resistor 13c are determined.
  • the first resistor 14 is provided on the control line 22 that connects the drive circuit 4 and the gate of the IGBT 3.
  • a second resistor 15 is provided on the drive circuit 4 side of the first resistor 14. Details of the resistance values of the first resistor 14 and the second resistor 15 will be described later.
  • the FET 16 is provided on a line 23 that connects the ground between the first resistor 14 and the second resistor 15 and is turned on when the output of the comparison circuit 12 is a high signal.
  • another semiconductor switching element may be used instead of the FET 16, another semiconductor switching element may be used. In this case, like the FET 16, it is required to be a voltage operation type.
  • the load driving device 1 amplifies the voltage appearing at the shunt resistor 11a and inputs it to the input terminal A of the control device 5 or a predetermined voltage signal when the output of the comparison circuit 12 is a high signal. Is provided to the input terminal B of the control device 5 and a pull-up resistor 32 is provided.
  • the protection circuit 13 when a high signal is output from the comparison circuit 12, the charge is stored in the capacitor 13 b, and the output of the comparison circuit 12 is on during the period until the charge is discharged through the resistor 13 c. Maintained in a state. Therefore, the IGBT 3 is maintained in the OFF state during this period.
  • the voltage generated in the shunt resistor 11a is amplified by the amplifier circuit 30 and input to the input terminal A of the control device.
  • the control device 5 the voltage value input from the input terminal A is compared with a predetermined reference value, and a short circuit is detected. As a result, an interrupt signal is generated, and a load cutoff signal for turning off the IGBT 3 is output to the drive circuit 4.
  • the drive circuit 4 operates to turn off the IGBT 3 based on the load cutoff signal. As a result, the IGBT 3 is turned off based on the load cutoff signal from the control device 5. Further, after the IGBT 3 is turned off based on a command from the control device 5, the maintenance of the high signal by the holding circuit 13 is released, and the output of the comparison circuit 12 is made a low signal.
  • FIG. 2 is a schematic diagram of a closed circuit for supplying current from the power source 6 to the PTC element 2.
  • a power source for example, in-vehicle high voltage battery
  • an inductance L specific to the vehicle is generated between the PTC element 2 and the power source 6.
  • the resistance of the first resistor 14 is made small so that the IGBT 3 can be cut off as early as possible, in other words, the charge stored between the gate and the emitter of the IGBT 3 can be discharged early. It is preferable to set. If the first resistor 14 is set to be small, the value of the current flowing through the line 23 increases, and the charge stored in the IGBT 3 is released early.
  • the short-circuit current i rises slowly but occurs between the collector and emitter of the IGBT.
  • the surge voltage increases. Therefore, when the inductance L is relatively large, it is preferable to set the resistance of the first resistor 14 to be large so that the IGBT 3 is cut off as slowly as possible. If the first resistor 14 is set larger, the value of the current flowing through the line 23 becomes smaller, and the charge stored in the IGBT 3 is released gradually.
  • the resistance value of the first resistor 14 takes into account the inductance L (see FIG. 2) between the power supply 6 that supplies current to the PTC element 2 and the PTC element 2, in other words, the cable length and the like. It is preferable to adjust for each vehicle. For example, by conducting a simulation or a pre-shipment test, the first value is set to an appropriate value so that the IGBT 3 is not broken down by a surge voltage and the peak value of the short-circuit current does not exceed the allowable current of the IGBT 3 and the PTC element. The resistance value of the resistor 14 is set.
  • control line 22 connecting the drive circuit 4 to the gate of the IGBT 3 needs to have a resistance value defined for normal switching. Therefore, a value obtained by subtracting the resistance value of the first resistor 14 from the specified value is set as the resistance value of the second resistor.
  • the inductance L depends on the cable length. Therefore, for example, information (for example, a table) in which the cable length is associated with the first resistor 14 is prepared in advance, and the resistance value of the first resistor corresponding to the cable length of each vehicle is obtained from this information. It is good also as setting.
  • the load driving device the vehicle air conditioner including the load driving device, and the load short-circuit protection circuit according to the present embodiment
  • the voltage output circuit 11 and the comparison circuit 12 are used.
  • the short circuit is quickly detected and an ON signal is output from the comparison circuit 12.
  • the FETs 16 and 31 are turned on, and the charge between the gate and the emitter of the IGBT 3 is released through the first resistor 14 and the like. Thereby, IGBT3 can be immediately made into an OFF state.
  • the short-circuit protection function by the control device 5 when used, that is, in the short-circuit protection based on the load cutoff signal, it takes about 10 ⁇ S from the detection of the short-circuit until the IGBT 3 is turned off.
  • the load short-circuit protection circuit 10 according to the present embodiment if used, the IGBT 3 can be turned off in about 2 to 3 ⁇ S.
  • the load short-circuit protection circuit 10 according to the present embodiment it is possible to quickly detect a short circuit, and to improve the response speed from the occurrence of a short circuit until the IGBT 3 is turned off.
  • the first resistor 14 and the second resistor 15 are provided as individual resistors.
  • the first resistor and the second resistor may be configured by one variable resistor IC.
  • the resistance value of the first resistor 14 and the resistance value of the second resistor 15 are set by adjusting the voltage dividing ratio according to a digital command from the microcomputer.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Electronic Switches (AREA)
PCT/JP2014/072928 2013-10-03 2014-09-01 負荷駆動装置、車両用空調装置、及び負荷短絡保護回路 Ceased WO2015049946A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201480044836.XA CN105474544B (zh) 2013-10-03 2014-09-01 负载驱动装置、车用空调装置以及负载短路保护电路
US14/910,195 US9923364B2 (en) 2013-10-03 2014-09-01 Load driving device, vehicle air-conditioning apparatus, and load short-circuit protection circuit
DE112014004562.4T DE112014004562T5 (de) 2013-10-03 2014-09-01 Vorrichtung zur Ansteuerung eines Verbrauchers, Fahrzeug-Klimaanlage und Laststromkreis zur Kurzschlusssicherung

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2013208218A JP6324696B2 (ja) 2013-10-03 2013-10-03 負荷駆動装置及びそれを備えた車両用空調装置並びに負荷短絡保護回路
JP2013-208218 2013-10-03

Publications (1)

Publication Number Publication Date
WO2015049946A1 true WO2015049946A1 (ja) 2015-04-09

Family

ID=52778541

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2014/072928 Ceased WO2015049946A1 (ja) 2013-10-03 2014-09-01 負荷駆動装置、車両用空調装置、及び負荷短絡保護回路

Country Status (5)

Country Link
US (1) US9923364B2 (enExample)
JP (1) JP6324696B2 (enExample)
CN (1) CN105474544B (enExample)
DE (1) DE112014004562T5 (enExample)
WO (1) WO2015049946A1 (enExample)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6634270B2 (ja) * 2015-11-13 2020-01-22 株式会社 日立パワーデバイス 電力変換装置
CN111257716B (zh) * 2020-02-24 2022-06-10 漳州科华技术有限责任公司 Igbt过流检测电路及芯片和电子设备
CN113331493A (zh) * 2021-05-08 2021-09-03 铂德（深圳）科技有限公司 短路保护电路及电子烟
CN113190073B (zh) * 2021-05-10 2022-05-31 深圳市海和科技股份有限公司 一种负载控制方法及装置
CN113970894B (zh) * 2021-10-22 2025-08-15 东风越野车有限公司 一种用于初始化电路的电源隔离保护电路及方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002290223A (ja) * 2001-03-26 2002-10-04 Yazaki Corp 負荷駆動装置
JP2002353795A (ja) * 2001-05-28 2002-12-06 Mitsubishi Electric Corp 半導体保護回路
JP2007306166A (ja) * 2006-05-10 2007-11-22 Toyota Motor Corp 絶縁ゲート型半導体素子の駆動装置およびその方法

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01238312A (ja) * 1988-03-18 1989-09-22 Sanyo Denki Seisakusho:Kk 保護機能付トランジスタ駆動回路
JPH0521723A (ja) * 1991-07-12 1993-01-29 Toshiba F Ee Syst Eng Kk パワートランジスタ
JP3032745B2 (ja) * 1992-09-04 2000-04-17 三菱電機株式会社 絶縁ゲート型半導体装置
JPH07146722A (ja) * 1993-10-01 1995-06-06 Fuji Electric Co Ltd トランジスタ用過電流保護装置
JP3332782B2 (ja) * 1997-02-27 2002-10-07 富士通テン株式会社 負荷駆動装置
US6717785B2 (en) * 2000-03-31 2004-04-06 Denso Corporation Semiconductor switching element driving circuit
JP3831894B2 (ja) 2000-08-01 2006-10-11 株式会社ルネサステクノロジ 半導体集積回路
JP2002324653A (ja) * 2001-04-24 2002-11-08 Denso Corp 電気ヒータ装置および車両用空調装置
CN1177408C (zh) * 2001-12-10 2004-11-24 艾默生网络能源有限公司 一种绝缘栅双极晶体管驱动保护电路
JP4267865B2 (ja) * 2002-04-19 2009-05-27 株式会社デンソー 負荷駆動装置
JP2008277351A (ja) 2007-04-25 2008-11-13 Auto Network Gijutsu Kenkyusho:Kk Ｐｔｃヒータ制御装置
JP4752811B2 (ja) * 2007-06-06 2011-08-17 日産自動車株式会社 電圧駆動型素子の駆動回路
JP2009038865A (ja) * 2007-07-31 2009-02-19 Panasonic Corp 短絡検出機能を備えた電力供給装置
JP2011130564A (ja) * 2009-12-17 2011-06-30 Hitachi Ltd パワー半導体スイッチ素子の保護装置および保護方法
JP5522094B2 (ja) * 2011-03-09 2014-06-18 三菱電機株式会社 ゲート回路
JP5979892B2 (ja) 2012-02-01 2016-08-31 三菱重工業株式会社 熱媒体加熱装置およびそれを備えた車両用空調装置
CN103001620A (zh) * 2012-11-14 2013-03-27 武汉谋智科技信息技术有限公司 一种栅极改进型igbt驱动电路

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002290223A (ja) * 2001-03-26 2002-10-04 Yazaki Corp 負荷駆動装置
JP2002353795A (ja) * 2001-05-28 2002-12-06 Mitsubishi Electric Corp 半導体保護回路
JP2007306166A (ja) * 2006-05-10 2007-11-22 Toyota Motor Corp 絶縁ゲート型半導体素子の駆動装置およびその方法

Also Published As

Publication number Publication date
US9923364B2 (en) 2018-03-20
CN105474544A (zh) 2016-04-06
US20160372914A1 (en) 2016-12-22
CN105474544B (zh) 2018-09-28
DE112014004562T5 (de) 2016-07-07
JP2015073217A (ja) 2015-04-16
JP6324696B2 (ja) 2018-05-16

Similar Documents

Publication Publication Date Title
JP5189929B2 (ja) 半導体スイッチ制御装置
CN102694531B (zh) 负载驱动设备和半导体开关装置驱动设备
US9257830B2 (en) Semiconductor device
JP6632794B2 (ja) 入力ノードから出力ノードに結合される負荷に電力を供給するためのシステム
US20240106347A1 (en) Systems and methods for controlled active discharge for inverter for electric vehicle
US9722594B2 (en) Drive device
CN102656763B (zh) 功率半导体开关元件的保护装置以及保护方法
US20120188001A1 (en) Electronic control apparatus having switching element and drive circuit
US9735767B2 (en) Electronic control apparatus having switching element and drive circuit
JP6324696B2 (ja) 負荷駆動装置及びそれを備えた車両用空調装置並びに負荷短絡保護回路
US20140218099A1 (en) Electronic apparatus
JP2013169102A (ja) ゲート駆動回路
JP2017152923A (ja) 負荷駆動装置
JP6396041B2 (ja) 車両及び故障検知方法
CN107623514A (zh) 半导体开关控制装置
WO2017215335A1 (zh) Igbt短路保护电路及方法、igbt驱动器以及igbt电路
JP2012172572A (ja) 電流制御機能および自己遮断機能を備えた半導体装置
JP2015073217A5 (enExample)
US11515870B2 (en) Linear switch circuits and methods
JP2011041349A (ja) 負荷回路の制御装置
US7864496B2 (en) Load dump protection for power FET device
JP6202208B2 (ja) パワー半導体素子の電流検出装置
JPWO2013038665A1 (ja) 内燃機関用点火装置
JP6969480B2 (ja) 電力変換装置
KR101243637B1 (ko) 차량용 블로워 모터 스위칭 장치

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 201480044836.X

Country of ref document: CN

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 14851033

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 14910195

Country of ref document: US

WWE Wipo information: entry into national phase

Ref document number: 1120140045624

Country of ref document: DE

Ref document number: 112014004562

Country of ref document: DE

122 Ep: pct application non-entry in european phase

Ref document number: 14851033

Country of ref document: EP

Kind code of ref document: A1