WO2015200132A1 - Circuit and method for detecting short circuit failure of a switching transistor - Google Patents
Circuit and method for detecting short circuit failure of a switching transistor Download PDFInfo
- Publication number
- WO2015200132A1 WO2015200132A1 PCT/US2015/036701 US2015036701W WO2015200132A1 WO 2015200132 A1 WO2015200132 A1 WO 2015200132A1 US 2015036701 W US2015036701 W US 2015036701W WO 2015200132 A1 WO2015200132 A1 WO 2015200132A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- output
- circuit
- gate
- transistor
- coupled
- Prior art date
Links
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
- H02H3/02—Details
- H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
- H02H3/044—Checking correct functioning of protective arrangements, e.g. by simulating a fault
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/26—Testing of individual semiconductor devices
- G01R31/2607—Circuits therefor
- G01R31/2621—Circuits therefor for testing field effect transistors, i.e. FET's
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
-
- 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
- H02H3/02—Details
- H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
-
- 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
- H02H3/08—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 current
-
- 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
- H02H3/08—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 current
- H02H3/093—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 current with timing means
Definitions
- a circuit and method are provided detecting a persistent short circuit in a power MOSFET for the purpose of protecting a load from over-current.
- Figure 1 depicts a prior art protection circuit 100 for protecting a load 110 from over- current stress due to a short-circuit failure 199 of a transistor 102, the protection circuit 100 comprising a current sense resistor 103 and a circuit breaker 106.
- the load 110 receives power from an input source of voltage 101 through the transistor 102 biased into conduction by a driver 105.
- the circuit breaker 106 disconnects the load 110 from the input voltage source 103.
- the prior art protection circuit 100 suffers high cost of components and is not well suited for integration in a monolithic die with the driver 105.
- circuit breaker 106 does not provide adequate protection in a system with low headroom voltage.
- the present invention proposes a method and circuit for detecting a short circuit failure of a switching transistor adapted for connecting a load to an input source of voltage, the method comprising: a step of detecting an over-current condition at the load; a step of biasing the switching transistor non-conductive when the over-current condition is detected; a step of a blanking delay to allow the over-current condition to clear; a step of reporting a fault status in the case of the over-current condition persisting past the blanking delay.
- Figure 1 depicts a prior art protection circuit.
- Figure 2 depicts one embodiment of a protection circuit according to the present invention.
- Figure 3 depicts another embodiment of a protection circuit according to the present invention.
- FIG. 2 depicts a detection circuit 200 of the present invention for detecting the short- circuit failure 199 of the transistor 102, the circuit 200 comprising: a current sense input CS; a driver output GT; a flag output FAULT; a comparator 201 for comparing voltage at CS to a reference REF and reporting a comparison result at an output; a driver 202 for biasing the transistor 102 non-conductive when voltage at CS exceeds REF; a circuit 203 for generating a blanking delay at the output of the comparator 201 for allowing the over-current condition to clear; a gate 204 reporting the short-circuit failure 199 at the flag output FAULT when the condition of the CS voltage exceeding REF persists past the blanking delay generated by circuit 203.
- a short-circuit failure 199 has occurred.
- the system can take appropriate steps in response to short-circuit failure 199. For example, the system can disable input source of voltage 101 or can disconnect load 110 from input source of voltage 101.
- Figure 3 depicts the detection circuit 200 of Figure 2, wherein a circuit 203 generates a blanking delay at the current sense input CS allowing the over-current condition to clear before the voltage at CS propagates to the comparator 201.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Protection Of Static Devices (AREA)
- Emergency Protection Circuit Devices (AREA)
- Electronic Switches (AREA)
- Power Conversion In General (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2016574403A JP2017525243A (en) | 2014-06-23 | 2015-06-19 | Circuit and method for detecting short circuit failure of switching transistor |
CN201580034099.XA CN106797114A (en) | 2014-06-23 | 2015-06-19 | For the circuit and method of detection switch transistor short trouble |
EP15733977.1A EP3158616A1 (en) | 2014-06-23 | 2015-06-19 | Circuit and method for detecting short circuit failure of a switching transistor |
KR1020177001927A KR20170024005A (en) | 2014-06-23 | 2015-06-19 | Circuit and method for detecting short circuit failure of a switching transistor |
TW104119975A TWI580182B (en) | 2014-06-23 | 2015-06-22 | Circuit and method for detecting short circuit failure of a switching transistor |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201462016090P | 2014-06-23 | 2014-06-23 | |
US62/016,090 | 2014-06-23 | ||
US14/743,945 US9658276B2 (en) | 2014-06-23 | 2015-06-18 | Circuit and method for detecting short circuit failure of a switching transistor |
US14/743,945 | 2015-06-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2015200132A1 true WO2015200132A1 (en) | 2015-12-30 |
Family
ID=54869416
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2015/036701 WO2015200132A1 (en) | 2014-06-23 | 2015-06-19 | Circuit and method for detecting short circuit failure of a switching transistor |
Country Status (7)
Country | Link |
---|---|
US (1) | US9658276B2 (en) |
EP (1) | EP3158616A1 (en) |
JP (1) | JP2017525243A (en) |
KR (1) | KR20170024005A (en) |
CN (1) | CN106797114A (en) |
TW (1) | TWI580182B (en) |
WO (1) | WO2015200132A1 (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9392460B1 (en) | 2016-01-02 | 2016-07-12 | International Business Machines Corporation | Continuous user authentication tool for mobile device communications |
CN108616108A (en) * | 2016-12-12 | 2018-10-02 | 中国航空工业集团公司西安航空计算技术研究所 | A kind of current foldback circuit of tracking failure severity |
CN107370117B (en) * | 2017-07-11 | 2019-04-30 | 深圳金三立视频科技股份有限公司 | A kind of output overcurrent and short-circuit protection circuit and a kind of electronic equipment |
US10782347B2 (en) * | 2017-10-23 | 2020-09-22 | Nxp B.V. | Method for identifying a fault at a device output and system therefor |
CN110446285B (en) * | 2018-05-02 | 2022-02-25 | 佛山市顺德区美的电热电器制造有限公司 | Electric cooking device and electromagnetic heating system for electric cooking device |
US10965215B2 (en) * | 2019-08-15 | 2021-03-30 | Microchip Technology Incorporated | Constant on-time buck converter with calibrated ripple injection having improved light load transient response and reduced output capacitor size |
KR102456560B1 (en) | 2020-08-25 | 2022-10-19 | (주) 트리노테크놀로지 | Power semiconductor device with improved short-circuit property |
CN112968429B (en) * | 2021-02-04 | 2023-02-28 | 高新兴物联科技股份有限公司 | Switch short-circuit protection circuit based on P-channel MOS tube |
US11929698B2 (en) | 2021-03-23 | 2024-03-12 | Snap-On Incorporated | Short circuit protection for a BLDC motor |
CN116990655B (en) * | 2023-09-26 | 2023-12-19 | 安徽大学 | Transistor short circuit detection circuit and method based on drain-source voltage change rate |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1693942A1 (en) * | 2005-02-21 | 2006-08-23 | Yazaki Corporation | Overcurrent detecting device |
US20070247774A1 (en) * | 2006-04-21 | 2007-10-25 | Cheng Xiao-Chang | Noise immune over current protection with inherent current limiting for switching power converter |
EP2146430A1 (en) * | 2007-05-14 | 2010-01-20 | Yasaki Corporation | Overcurrent protection device |
US20130214806A1 (en) * | 2012-02-21 | 2013-08-22 | Hamilton Sundstrand Corporation | Self-test of over-current fault detection |
US20130342938A1 (en) * | 2012-06-20 | 2013-12-26 | Fairchild Korea Semiconductor Ltd. | Short sensing circuit, short sensing method and power supply device comprising the short sensing circuit |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2734974B1 (en) * | 1995-05-31 | 1997-07-18 | Sgs Thomson Microelectronics | MICROCONTROLLER FOR IMAGE DISPLAY APPLICATIONS ON TUBE WITH CATHODE DISPLAY. |
US6185082B1 (en) * | 1999-06-01 | 2001-02-06 | System General Corporation | Protection circuit for a boost power converter |
US7593245B2 (en) * | 2005-07-08 | 2009-09-22 | Power Integrations, Inc. | Method and apparatus to limit maximum switch current in a switching power supply |
US8018694B1 (en) * | 2007-02-16 | 2011-09-13 | Fairchild Semiconductor Corporation | Over-current protection for a power converter |
JP5110700B2 (en) * | 2008-03-27 | 2012-12-26 | 太平洋セメント株式会社 | Combustion waste fuel conversion system and fuel conversion method |
US7986149B2 (en) * | 2008-08-19 | 2011-07-26 | Infineon Technologies Austria Ag | System and method for adaptive load fault detection |
JP5315155B2 (en) * | 2009-07-23 | 2013-10-16 | 日立オートモティブシステムズ株式会社 | Semiconductor element control device, automotive electrical system |
JP5307660B2 (en) * | 2009-07-30 | 2013-10-02 | 新日本無線株式会社 | Short circuit protection circuit for switching drive circuit |
JP2012010577A (en) * | 2010-05-28 | 2012-01-12 | Panasonic Corp | Overcurrent protection circuit and overcurrent protection method |
US8331072B1 (en) * | 2010-08-25 | 2012-12-11 | Maxim Integrated Products, Inc. | Timer controlled, short and open circuit fault detection with slew-rate boosted output driver |
JP5724913B2 (en) * | 2012-03-15 | 2015-05-27 | トヨタ自動車株式会社 | Power converter |
EP2712084B1 (en) * | 2012-09-20 | 2019-11-06 | Infineon Technologies AG | Semiconductor device including short-circuit protection with a variable threshold |
US9520879B2 (en) * | 2014-06-18 | 2016-12-13 | Texas Instruments Incorporated | Adaptive blanking timer for short circuit detection |
-
2015
- 2015-06-18 US US14/743,945 patent/US9658276B2/en not_active Expired - Fee Related
- 2015-06-19 JP JP2016574403A patent/JP2017525243A/en active Pending
- 2015-06-19 EP EP15733977.1A patent/EP3158616A1/en not_active Withdrawn
- 2015-06-19 CN CN201580034099.XA patent/CN106797114A/en active Pending
- 2015-06-19 KR KR1020177001927A patent/KR20170024005A/en not_active Application Discontinuation
- 2015-06-19 WO PCT/US2015/036701 patent/WO2015200132A1/en active Application Filing
- 2015-06-22 TW TW104119975A patent/TWI580182B/en not_active IP Right Cessation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1693942A1 (en) * | 2005-02-21 | 2006-08-23 | Yazaki Corporation | Overcurrent detecting device |
US20070247774A1 (en) * | 2006-04-21 | 2007-10-25 | Cheng Xiao-Chang | Noise immune over current protection with inherent current limiting for switching power converter |
EP2146430A1 (en) * | 2007-05-14 | 2010-01-20 | Yasaki Corporation | Overcurrent protection device |
US20130214806A1 (en) * | 2012-02-21 | 2013-08-22 | Hamilton Sundstrand Corporation | Self-test of over-current fault detection |
US20130342938A1 (en) * | 2012-06-20 | 2013-12-26 | Fairchild Korea Semiconductor Ltd. | Short sensing circuit, short sensing method and power supply device comprising the short sensing circuit |
Also Published As
Publication number | Publication date |
---|---|
US20150369854A1 (en) | 2015-12-24 |
CN106797114A (en) | 2017-05-31 |
EP3158616A1 (en) | 2017-04-26 |
JP2017525243A (en) | 2017-08-31 |
KR20170024005A (en) | 2017-03-06 |
US9658276B2 (en) | 2017-05-23 |
TWI580182B (en) | 2017-04-21 |
TW201613269A (en) | 2016-04-01 |
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