英飞凌IGBT驱动保护培训资料

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1、Over-temperature, Over-current& Over-voltage protection in IGBT applicationNever stop thinking22.05.2007For internal use onlyCopyright Infineon Technologies 2007. All rights reserved.Page 2Over-temperature Type Ambient temperature Ta Heat sink temperature Th Baseplate temperature Tc Junction tempera

2、ture Tj Inlet/outlet temperature2 mm1607/03InfineonOver-temperature Ta - depends on extemal cooling application, limit of comp orients in the cabi net in side Sometimes, Max allowable Ta = 50oC, or 40oC (typical) Th depends on the cooling capability and design for the power dissipation based on the

3、real application. Tc - depends on case temperatu勺 and determined by the nominal current definition (Tc=100oC,or 85oC) Tj max. allowable operational Tvjop (125oC/150oC).Module NTC for temperature measurementNTC-temperature for a module with a base-plate:NTC-temperature for a module1 without a base-pl

4、ateThe correction factor could be different for different modules. It depends on the position of the NTC.InfineonModule NTC vs. TjFP75R12KE3Tj CTntc【CFailure Over TemperatureLarge Areas of the Aluminum Layer are molten Typical Beads.InfineonSolder below the IGBT is poured outBubbles in the Imides la

5、yer22.05.2007For internal use onlyCopyright Infineon Technologies 2007. All rights reserved.Page 6InfineonSafety isolation Temperature measurementq Isolated Sigma-Delta converterExample: AD7400 Sigma-Delta modulatorq High precision V-F converter + Optocoupler Example: LM231q High precision timer + O

6、ptocouplerExample: SA555q Lin ear optocouplerExample: IL30022.05.2007For internal use onlyCopyright Infineon Technologies 2007. All rights reserved.Page 7Safety Isolation 一 LinearoptocouplerInfineonBond WireNTCSilicon Chip CeramicBuilt-in NTC Thermistor in Moduleir6VoutR2 4VCC 2Vc 3十T/CR/kQ25 05.000

7、30.04 15635.03.4724002.91445.02.45350.02.08355.01773GO.Ot515G5.01.30070.01 12075.00.96838000.840485.00731990.00.639795.00.5608100.00.4933105.00.4352110 00.3S51115 00.3418120 00.3042125 00.2714130 00.2428135.00.217814000.1959145 00.1765150.00.159522.05.2007For internal use onlyCopyright Infineon Tech

8、nologies 2007. All rights reserved.Page 9Over-current protectionInfineon22.05.2007For internal use onlyCopyright Infineon Technologies 2007. All rights reserved.Page 10Over-current protectionInfineonIc/lcn i87653Short CircuitAreaf Z /Phase 1:RBSOA OC protection area.Vge = 15 VSuitable Areafor Vce-sa

9、tProtecti onPhase 1Phase 2:Forbidden SOA SC starting point.234567891011 12VceV22.05.2007For internal use onlyCopyright Infineon Technologies 2007. All rights reserved.Page 11IGBT Protection Overcurrent protectionInfineon22.05.2007For internal use onlyCopyright Infineon Technologies 2007. All rights

10、reserved.Page #IGBT Protection Overcurrent protectionInfineon Clamping the Gate VoltageT limit the peak SC current Switch off IGBT after SC current is stableT lower SC current, lower di/dt 2-step Turn-offMomentsicnerer RucKwarls-AroeitsDereicn igbt-wl(rbsoa) reverse Dias sate operating area iGBT-inv

11、. (RBSOA)VCE VSicherer Ruckwarts-Arbeitsbereich IGBT-Wr. (RBSOA) reverse bias sare operating area IGBT-inv. (RBSOA) lc = f (Vce)Vge = 15 V, RGoff = 47 Q Tvj = 1500Vce MOver current setting point of Ic VGES) or cause the SC curre nt to drastically in crease Possible causes of VCE over voltage: Fast S

12、C turn-off & high stray in du eta nee(Solutions: soft shut-down, turn-off delay) Regenerative braking (Solution: brake chopper) Fluctuate on of line voltageInfineonIGBT switching on/off process“s+（% * ） 辰 maxdt22.05.2007For internal use onlyCopyright Infineon Technologies 2007. All rights reserved.P

13、ageOver-voltage reductionInfineon Use appropriate snubber circuit to suppress the overvoltage; Adjust the Vge/Rg to decrease the di/dt; Select the low impedanee capacitors; Place the capacitor as close as IGBT module to reduce the loop in du eta nee;Connect the power and snubber loop with IGBT modul

14、e as short as possible;22.05.2007For internal use onlyCopyright Infineon Technologies 2007. All rights reserved.Page 15General RCD snubberRCD snubber，other RC and RCD snubbers:Infineon Can realize even smaller Vcepeak than RCD snubber. Snubber R would have very big power dissipation Low impedanee R

15、is hard to find.Will not influence IGBT turn onHuge losses on snubber R|Quite hard to find a suitable R value, whenswitching frequency is highBe used belowhundreds Wattapplicati onSeldom used22.05.2007For internal use onlyCopyright Infineon Technologies 2007. All rights reserved.Page 17InfineonLaloa

16、dI capacitor 二 C * dllMtloadC Snubber circuitV。= L- di/dtVCE 二 VDC + V口二 VDC + Lc * di/dt7L62 OV reductionC position is close to power terminals as possibleInfineonLoop (DC capacitor, C snubber) LI: DC capacitor inductance + bus bar inductance L2: module terminal to snubber capacitor inductanee L31/

17、L32: Upper/Bottom IGBT internal stray inductanee L4: snubbecapacitor internal stray inductance Loop A: bus LC oscillation loopLoop B: commutation loop through snubber22.05.2007For internal use onlyCopyright Infineon Technologies 2007. All rights reserved.Page 19Over-voltage protectionInfineonEile Ed

18、it Vertical Hnriz/Acq Irig Qisplay Cursors Measure Masks 阳 th Mcope Qtilit22.05.2007For internal use onlyCopyright Infineon Technologies 2007. All rights reserved.Page 20Cs vs Bus bar constructionInfineonDC +1L：DC -Ic22.05.2007For internal use onlyCopyright Infineon Technologies 2007. All rights res

19、erved.Page 22InfineonOvershoot voltage & Snubber capacitor22.05.2007For internal use onlyCopyright Infineon Technologies 2007. All rights reserved.Page 23Infineon22.05.2007For internal use onlyCopyright Infineon Technologies 2007. All rights reserved.Page #InfineonFlo wiui UncbkM Thqim 跆 Curios川)枠 U

20、Atas HappCs=0uFP4“31C?C3Tnetacs 阿500 W0OIVC120031 -JOOlVtU15八1crc?P5tWj PSfiC3jUfiV)61 WK4VSWlfiPSrwtjCJj 5MV30WO、iHBi fiTMnOVdc=1.8kV, IC=528A, Vcp = 2.61kVVdc=1.8kV, IC=529AZ Vcp = 2-43kV22.05.2007For internal use onlyCopyright Infineon Technologies 2007. All rights reserved.Page #InfineonC =3.6uF

21、Cycle: 7us)OOXMv 40l0VohtlTQ W| 1 SOOiVjPlmr5VMS咚诚口妙丫 KMpii4 iyPjmxcoPjrn：)iJ/4Jy1MVp (P2ixrt：事Tiujw Ow Crw5 *?w KMhhmiP7 融uaVdc=1.8kVz Ic=530Az Vcp = 2.43kV Reduce the overshoot voltage to appropriately chose the snubber capacitor value, or else the oversize value is useless22.05.2007For internal use onlyCopyright Infineon Technologies 2007. All rights reserved.Page 24Innovative semiconductor solutions for energy efficiency, communications and security.