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skhi 64 ? by semikron 040629 ? rev.04 1 / 13 absolute maximum ratings symbol term value unit v s supply voltage non stabilized 30 v v ih input signal voltage (high) 18 v v ce collector emitter voltage (max.) 1700 v dv/dt rate of rise and fall of voltage (secondary to primary side) 50 kv/s visol io i solation test voltage (ac, rms, 2 sec.) input ? output 4000 v visol pd partial discharge extinction voltage, rms, q pd 10 pc 1500 v visol 12 isolation test voltage (ac, rms, 2 sec.) output 1 - output 2 1500 v f switching frequency 20 khz t op (t stg ) operating (storage) temperature range - 25 ... + 70 c electrical characteristics (t amb = 25 c) values symbol term min typ max. units v s2 supply voltage non stabilised 13 24 27 v i s2 supply current max 1/v s2 *[7,8w+1,21(w/khz)*f(khz)+power dissipation for the current sensors] a v it+ input threshold voltage (high) 9 ? 13.1 v v it- input threshold voltage (low) 3,1 ? 6,8 v r in input resistance ? 10 ? k ? v g(on) turn-on gate voltage output ? +15 ? v v g(off) turn-off gate voltage output ? -8 ? v t d(on)io input-output turn-on propagation time ? 1 ? s t d(off)io input-output turn-off propagation time ? 1 ? s t preset error memory reset time ? 9 ? s t td top - bottom switch interlock dead-time no inter- lock ? 4 s v cestat collector-emitter threshold static monitoring voltage 4,7 5,2 5,7 v t bl v cestat blanking time at turn-on 3,5 4 4,5 s i tripsc over current trip level (i analogout = 10v) 197 ? 517 a t tp over temperature protection ? 115 ? c c ps coupl. capacitance primary-secondary ? 27 ? pf c in input capacitance - 1 - nf m weight 110 g semidriver ? skhi 64 gate driver for skim ? 4 f eatures ? current source driving technology (csdt) ? snap-on technology ? spring connected to power section ? wide range power supply ? v ce -monitoring ? short circuit protection ? over current protection (trip level can be adjusted by the customer via dip switches) ? dc-link voltage detection ? temperature sensing ? under voltage monitoring ? interlock top/bottom switch (interlock time (1s, 2s. 3s, 4s or no interlock) can be adjusted by the customer via dip switches) ? error latch / output ? isolation by transformers ? gb / gd mode ? dc bus voltage up to1200v ? separate interfaces to connect external phase current sensors t his technical information specifies semiconductor devices but promises no characteristics. no warranty or guarantee expressed or implied is made regarding delivery, performance or suitability.
skhi 64 ? by semikron 040629 ? rev.04 2 / 13 fig. 1: dimensions fig. 2: connectors and pin array x1 4 3 2 1 4 3 2 1 4 3 2 1 x2 x2 x 2 1 26
skhi 64 ? by semikron 040629 ? rev.04 3 / 13 pin array x1: (din 41651 connector 26 pin) pin signal remark 1 shield connected to gnd when shielded cable is used 2 bot hb 1 (w) in positive 15 v cmos logic; 10 kohm impedance 3 error hb 1 (w) out 1) short circuit monitoring hb1 (w) low = no error; open collector output; max. 30v / 15ma 4 top hb 1 (w) in positive 15 v cmos logic; 10 kohm impedance 5 bot hb 2 (v) in positive 15 v cmos logic; 10 kohm impedance 6 error hb 2 (v) out 1) short circuit monitoring hb2 (v) low = no error; open collector output; max. 30v / 15ma 7 top hb 2 (v) in positive 15 v cmos logic; 10 kohm impedance 8 bot hb 3 (u) in positive 15 v cmos logic; 10 kohm impedance 9 error hb 3 (u) out 1) short circuit monitoring hb 3 (u) low = no error; open collector output; max. 30v / 15ma 10 top hb 3 (u) in positive 15 v cmos logic; 10 kohm impedance 11 overtemp. out 1) low = no error = ? dcb < 115 5c open collector output; max. 30 v / 15 ma 12 errorsum under voltage monitoring (if error hb 1, 2, 3 out is low) low = no error; open collector output; max. 30v / 15ma 13 u dc analog out actual dc-link voltage u dcanalogout = u dc-link / 100 (accuracy 2%) u dcmax = 1200v max. output current 5ma 14 + v s in 15 + v s in min. 13v; max. 27v 16 + 15 v dc out 17 + 15 v dc out 15 v dc + 4 %, min. 13,9v; i out = 50ma 18 gnd 19 gnd gnd for power supply and gnd for digital signals 20 temp. analog out v(t ana )=11*10 -3 *(1321+(1000*(1+7,635*10 -3 *(t h -25)+17,31*10 -6 *(t h -25) 2 )))-25 max. output current 5 ma 21 gnd aux reference for analogue output signals 22 i analog out hb 1 (w) current actual value 10 v refer to over current trip level max. output current 5ma current value > 0 ? skim is source current value < 0 ? skim is sink 23 gnd aux reference for analogue output signals 24 i analog out hb 2 (v) current actual value 10 v refer to over current trip level max. output current 5ma current value > 0 ? skim is source current value < 0 ? skim is sink 25 gnd aux reference for analogue output signals 26 i analog out hb 3 (u) current actual value 10 v refer to over current trip level max. output current 5ma current value > 0 ? skim is source current value < 0 ? skim is sink 1) open collector output, external pull up resistor necessary
skhi 64 ? by semikron 040629 ? rev.04 4 / 13 x2: (plug-connectors for external current sensors) pin signal remark 1 supply voltage +15v 2 supply voltage ?15v 3 measure built-in measuring resistance (rm) of 7,15 ? 4 0v / shield dip settings: i trip dip signal 1 2 3 4 5 adjustment over current trip level (see chapter ?over current protection (ocp) and short circuit protection?) timing dip signal 1 2 3 adjustment dead time generation (interlock top / bottom) (see chapter ?dead time generation (interlock top / bottom?) 4 adjustment gb / gd mode (see chapter ?gb / gd mode?) molex 5045-04 4 3 2 1 p roduct information of suitable female h ousing, female terminal and distributor c ontact information is available at http://www.molex.com i trip timing p lease note: t he plug connectors for external current sensors are not short-circuit proof. p lease note: p lease remove the f oil from the dip s witches before the a djustment. this foil d oes not have to be s et again after the dip adjustment.
skhi 64 ? by semikron 040629 ? rev.04 5 / 13 general description skhi 64 is a universal six pack gate driver for skim 4 igbt modules, which can be used for all available voltage an current ranges. this driver provides a complete solution with integrated protection and monitoring functions, potential isolation, connectors for external current sensors and an interface for controllers. general features of the gate driver skhi 64: ? wide range (13v ? 27v) supply voltage ? 15v cmos level input signals (positive logic) ? current source driving technology (csdt) ? integrated power supply for secondary side and current sensors ? isolation between primary and secondary side ? open collector error output ? gb-synchronisation ? din 41651 connector for controller interface protection and monitoring functions: ? interlock for top and bottom igbt ? interlock time (1s, 2s, 3s, 4s or no interlock) can be adjusted via dip switches ? short pulse suppression ? input pulse shaping ? under voltage monitoring ? transient over voltage protection of supply voltage by suppressor diode ? heat sink over temperature protection ? v ce -monitoring (de-saturation monitoring) ? o ver c urrent p rotection (external current sensor necessary) ? over current trip level can be adjusted via dip switches ? dc link voltage sensing ? error latch and error feedback via open collector transistor (external pull up resistor necessary) fig. 3: block diagram of one phase leg skhi 64 v cesat monitoring power supply control signal error feedback power supply edge memory power driver v cesat monitoring power supply edge memory power driver top bot error feedback level shifter input shaper analog sensing and monitoring dip setting under voltage lockout and power-on-reset error detection and error memory dc/dc converter short pulse suppression and buffer control signal power stage timing wide range power supply ? ? ? ? dcb + - c top e bot dc link current sensing
skhi 64 ? by semikron 040629 ? rev.04 6 / 13 technical explanations current source driving technology (csdt) skhi 64 is a current source gate driver. the turn-on and turn-off of the igbt is controlled via a positive and negative gate current. csdt enables that only one type is sufficient to drive igbts with different chip technologies (e. g. trench fs, soft punch through), as well as to compensate the input capacitance variations resulting from wide current and voltage ranges. this unique property eliminates the need of any additional components to adapt the gate driver to the specific igbt. skhi 64 is one gate driver, which can be used for all available skim 4 voltage and current ranges. insulation magnetic transformers are used for insulation between gate driver primary and secondary side. the circuit used for the dc voltage measurement is designed, manufactured and tested according to standard en 50178 (vde 0160). the insulation test voltage is given in the absolute maximum ratings of the gate driver. auxiliary power supply the gate driver skhi 64 has got an integrated wide range auxiliary power supply 13v - 27v. the following table shows the required features of an appropriate power supply for the gate driver skhi 64. when the gate driver is supplied with 13v ? 27v it is possible to use 15v provided at the din 41651 connector of the gate driver as an auxiliary power supply, e.g. for a level-shifter at the controller?s output signals. the current consumption of the gate driver depends on the level of supply voltage used, the stand by current, the switching frequency, the capacitance of the igbt gates in use and on the supply current for the external current sensors at rated output current. in the electrical characteristics of the gate driver the following equation for the evaluation of the current consumption is given: unregulated power supply 13v - 27v + 15 v dc out (can be used if 13v ? 30v supply is active) < 50 ma minimum peak current of auxiliary supply 1 a power on reset completed after 150 ms p lease note: d o not apply switching s ignals during power on reset. i s2 = 1 / v s2 * [ 7,8w + 1,21(w/khz)*f(khz) + power dissipation for the current sensors] stand by power power depending on switching frequency power depending on the supply current of the external current sensors at rated output current supply voltage gate driver (13v ? 27v) p lease note: the insulation of the driver is a basic insulation only . equipment which is designed according to en 50178 must have further insulation for all parts which might be touched by a person.
skhi 64 ? by semikron 040629 ? rev.04 7 / 13 user interface (x1: din 41651 connector) the figures below shows the schematics of the skhi 64 of the digital input and anlog output lines. 1nf 6,81kohm 3,32kohm asic input bss bss fig. 4: schematics of the skhi 64 digital input lines short pulse suppression the integrated short pulse suppression avoids very short switching pulses at the igbt module caused by high- frequency interference pulses at the driver input signals. turn-on- and turn-off-pulses shorter than 500ns are suppressed. under voltage protection the under voltage protection monitors the internal 15v dc which is provided by the internal dc-dc converter (converts the unregulated input voltage to 15v dc). if the under voltage trip level is reached, the igbts are switched off and switching pulses from the controller are ignored, as long as the voltage is below the trip level. the error latch is set. the output ,,errorsum? is in high state. the trip level of the internal regulated +15v is 13,5v. p lease note: the output ?errorsum? is an open collector output, which needs external pull up resistor.
skhi 64 ? by semikron 040629 ? rev.04 8 / 13 dead time generation (interlock top / bottom) the interlock circuit prevents, that the top and the bottom igbt of one half bridge are switched on at the same time (internal short circuit). the interlock time can be adjusted via dip switches (fig. 5). the dead time does not add to a dead time given by the controller. in case of a different dead time of controller and driver, always the longer one is valid. it is possible to control skhi 64 with on switching signal and its inverted signal no error message will be generated when overlap of switching signals occurs. it is possible to disable the interlock between top and bottom switch, to drive top and bottom switch synchronously in overlap mode. timing interlock dip 1 dip 2 dip 3 [s] on on off 1 off on off 2 on off off 3 off off off 4 x x on no interlock fig. 5: adjustment of interlock top / bottom temperature protection the temperature sensor integrated in skim 4 modules is a semiconductor resistor with nearly proportional characteristic (ptc characteristic). the sensor is soldered isolated onto the ceramic substrate close to the igbt and freewheeling diodes and indicates the actual substrate temperature which is usually close to the heat sink temperature under the substrate. an evaluation circuit realised on the gate driver provides an analog voltage signal of the actual heat sink temperature value (fig. 6) at the din 41651 connector. the accuracy is ? 5 c. 0 2 4 6 8 10 12 20 30 40 50 60 70 80 90 100 110 120 temperature in c temp. analog out in v fig. 6: analog temperature signal t analogout vs. t sensor (at pin ,,temp. analog out?) at a maximum temperature of 115c ? 5 c (trip level) the igbts are switched off and switching pulses from the controller are ignored. the error latch is set. the outputs ?overtemp. out? and ?error out? are in high state. p lease note: d ead time adjustment by factory is 4s. p lease note: the outputs ?overtemp. out? and ?error out? are open collector outputs, which need external pull up resistors.
skhi 64 ? by semikron 040629 ? rev.04 9 / 13 dc link voltage sensing with the dc link voltage sensing, an analog voltage signal of the actual dc link voltage level is available at the din 41651 connector. the measurement is realised by a high impedance differential amplifier. v ces u dc analog out input impedance 600v 400v 4v 1200v 900v 9v 1700v 1200v 12v 10 mohm the failure of the measured signal is 2% @ t amb = 25c. the analog output signal u dc analog out is filtered with a time of = 500s. over current protection (ocp) and short circuit protection external current sensors are required for the o ver c urrent p rotection (ocp) system and ac current control. three sensors (close loop current sensors with magnetic probe and integrated electronics) have to be connected to the plug-connectors integrated in the gate driver (fig. 6). electrical supply for the current sensors (supply voltage 15v, reference current / compensation current) will be provided by the gate driver. fig. 7: connection of external phase current sensors the evaluation electronics integrated in the gate driver analyses the current sensor signals of the external phase current sensors. if the ac output current is higher than a maximum permissible level, the igbts are immediately switched off and switching pulses from the controller are ignored. the error latch is set. the output ?error out? is in high state. the over current trip level can be adjusted via dip switches (fig. 8). ocp reacts independently of the temperature. in addition skhi 64 uses v cesat monitoring to protect the phase leg against internal short circuit (?shoot through? protection). even if ocp is used, the v cesat monitoring remains active. both protection functions monitor the power module in parallel and can generate a protective shutdown. if no external current sensors are connected, only the v cesat monitoring is active. current sensor p lease note: a dc link over voltage protection is not integrated. p lease note: the output ?error out? is open collector outputs, which needs an external pull up resistors. p lease note: t he current direction is defined by the arrow on the current sensors.
skhi 64 ? by semikron 040629 ? rev.04 10 / 13 it is possible to connect only one or two external current sensor. in this case a total ocp protection is not available. an analog voltage signal of the actual ac current level is available at the din 41651 connector. the failure of the measured signal is 3% (without current sensor). the accuracy of the adjusted over current trip level is 5%. fig. 8: adjustment of over current trip level and normalisation of the ac current p lease note: over current trip level adjustment by factory is 275,8a. it is recommended not to use a trip level > 200% i c (i c = rated current of the of the skim module @ t s = 25 c). 1 : 1000 1 : 1500 1 : 2000 1 : 2500 1 : 2000 ianalogout ianalogout ianalogout ianalogout dip 1 dip 2 dip 3 dip 4 dip 5 [a] [mv / a] [mv / a] [mv / a] [mv / a] on on on on on 517,3 38,66 25,77 19,33 15,46 off on on on on 495,6 40,35 26,90 20,18 16,14 on off on on on 471,6 42,41 28,27 21,20 16,96 off off on on on 453,5 44,10 29,40 22,05 17,64 on on off on on 429,4 46,57 31,05 23,29 18,63 off on off on on 414,4 48,27 32,18 24,13 19,31 on off off on on 397,5 50,32 33,55 25,16 20,13 off off off on on 384,5 52,01 34,68 26,01 20,81 on on on off on 363,6 55,00 36,67 27,50 22,00 off on on off on 352,8 56,69 37,79 28,35 22,68 on off on off on 340,5 58,75 39,16 29,37 23,50 off off on off on 330,9 60,44 40,29 30,22 24,17 on on off off on 317,9 62,91 41,94 31,46 25,16 off on off off on 309,6 64,60 43,07 32,30 25,84 on off off off on 300,0 66,66 44,44 33,33 26,66 off off off off on 292,6 68,35 45,57 34,17 27,34 on on on on off 278,6 71,78 47,85 35,89 28,71 off on on on off 272,2 73,47 48,98 36,74 29,39 on off on on off 264,8 75,53 50,35 37,76 30,21 off off on on off 259,0 77,22 51,48 38,61 30,89 on on off on off 251,0 79,69 53,13 39,85 31,88 off on off on off 245,7 81,39 54,26 40,69 32,55 on off off on off 239,7 83,44 55,63 41,72 33,38 off off off on off 234,9 85,13 56,76 42,57 34,05 on on on off off 227,0 88,12 58,75 44,06 35,25 off on on off off 222,7 89,81 59,87 44,91 35,92 on off on off off 217,7 91,87 61,24 45,93 36,75 off off on off off 213,8 93,56 62,37 46,78 37,42 on on off off off 208,3 96,03 64,02 48,02 38,41 off on off off off 204,7 97,72 65,15 48,86 39,09 on off off off off 200,4 99,78 66,52 49,89 39,91 off off off off off 197,1 101,47 67,65 50,74 40,59 dip settings turns ratio of the current sensor over current trip level
skhi 64 ? by semikron 040629 ? rev.04 11 / 13 gb / gd mode the function gb / gd mode enables the use of the six pack driver (gd mode) as a half bridge driver (gb mode). this can be adjusted via dip switch. the table below shows the configuration. timing mode dip 4 gb on gd off if the gb mode is activated, a signal at top hb 1 in and bot hb 1 in enables the synchronous drive of all outputs. a fault distinction of hb1, hb 2 and hb 3 is possible. error latch and error feedback any error detected will set the error latch and force the output ?error out? into high state. switching pulses from the controller will be ignored. reset of the error latch is only possible with no error present and all input signals in low state for t preset > 9 s. all logical outputs are open collector transistors with max. 30v / 15ma. an external pull-up resistor to controller logic high level is required. (low signal = no error - wire break monitoring). pin 3 error hb 1 out pin 6 error hb 2 out pin 9 error hb 3 out pin 11 overtemp. out pin 12 errorsum under voltage protection hb 1 9 9 9 9 under voltage protection hb 2 9 9 9 9 under voltage protection hb 3 9 9 9 9 v ce protection hb 1 9 9 9 9 v ce protection hb 2 9 9 9 9 v ce protection hb 3 9 9 9 9 ocp hb 1 9 9 9 9 9 9 9 9 9 9 9 9 ocp hb 2 9 9 9 9 9 9 9 9 9 9 9 9 ocp hb 3 9 9 9 9 9 9 9 9 9 9 9 9 temperature protection 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 fig. 9: fault output signals and fault generation p lea s e note: a djustment by factory is gd mode. a pplication hint gb mode: e ven if all conditions for optimal driver circuit and layout design have been fulfilled, an ideal static and dynamic symmetrization will not be achievable. small differences in switch i ng times might occur due to differing signal p ropagation times. therefore, derating has to be considered with respect to the total load current of the switches. the consequent dynamic asymmetries may be minimized by series inductance in the connected load paths.
skhi 64 ? by semikron 040629 ? rev.04 12 / 13 snap-on operation range and application limits the maximum load current i load may be calculated with the following formula and dependence of the gate charge, switching frequencies and turns ratio of the connected current sensors @ t s = 25c. () () ) ( ) ( 12 500 3 000 ) ( khz f q q ma a i gate load ? ? ? = fig 10. shows the current sensors with the different turns ratio for the driver and the allowed maximum current load. turns ratio of the current sensor i loadmax 1 : 1000 1000 259 a 1 : 1500 1500 388 a 1 : 2000 2000 517 a 1 : 2500 2500 646 a fig. 10: turns ratio of the permitted current sensors for example a skim module with a gate charge of 2c per switch, a current sensor with a turns ratio of 1:2000 allows a maximum load current of 253a at a maximum switching frequency of 5khz. assembly skhi 64 does not need any soldering, wire or plug-in connection. the electrical connections are realised via spring-contacts integrated in skim modules and landing pads on the bottom side of the gate driver. after assembly (snap-on technology), the landing pads of the gate driver press onto the spring-contacts of the power module, leading to a pressure contacted electrical connection. fig. 11: snap-on assembly p lease note: it is mandatory to fix the gate driver with screws. a mounting instruction is available at http://www.semikron.com (product page skim, link ?mounting instructions skim?).
skhi 64 ? by semikron 040629 ? rev.04 13 / 13 auxiliaries snubber capacitors semikron provides film capacitors which can be adapted onto the dc terminals of the skim. these capacitors reduce the over voltage peak during commutation and are recommended by semikron. the table below lists the available types. capacitance / dc voltage recommended for use with part number 4,7f / 630v 600v skim 41064600 2,2f / 1000v 1200v skim 41064610 1,5f / 1600v 1700v skim 41064620 application and handling instructions ? the standard connection to the skhi 64 is done via a din 41651 connector. because of voltage drop and for immunity against electromagnetic interference the maximum length of the flat cable should not exceed 3 meters. to avoid interferences, the flat cable should be placed as far as possible away from the power terminals, the power cables, the dc-link capacitors and all other noise sources. it is highly recommended by semikron to use a shielded (flat) cable. ? please provide for static discharge protection during handling. as long as the hybrid driver is not completely assembled, the input terminals have to be short-circuited. persons working with cmos-devices have to wear a grounded bracelet. any synthetic floor coverings must not be statically chargeable. even during transportation the input terminals have to be short-circuited using, for example, conductive rubber. worktables have to be grounded. the same safety requirements apply to mosfet- and igbt-modules. ? any parasitic inductances within the dc-link have to be minimised. over-voltages may be absorbed by c- or rcd-snubbers between the main terminals for plus and minus of the power module. ? when first operating a newly developed circuit, semikron recommends to apply low collector voltage and load current in the beginning and to increase these values gradually, observing the turn-off behaviour of the free-wheeling diode and the turn-off voltage spikes generated across the igbt. an oscillographic control will be necessary. in addition to that the case temperature of the module has to be monitored. when the circuit works correctly under rated operation conditions, short-circuit testing may be done, starting again with low collector voltage. ? it is important to feed any errors back to the control circuit and to switch off the device immediately in such events. repeated turn-on of the igbt into a short circuit with a high frequency may destroy the device. further application support latest information is available at http://www.semikron.com . further questions can be placed via http://faq.semikron.com/ . t his technical information specifies semiconductor devices but promises no characteristics. no warranty or guarantee expressed or implied is made regarding delivery, performance or suitability.

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