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| SKHI 61 ... Absolute Maximum Ratings Symbol Conditions VS ViH IoutPEAK IoutAVmax fmax Supply voltage primary Input signal voltage Output peak current Output average current (Ta = 85 C) Max. switching frequency (CGE < 9nF) Collector emitter voltage sense across the IGBT (for 1200V-IGBTs) Rate of rise and fall of voltage (secondary to primary side) Isolation test voltage input - output (2 sec. AC) Isolation test voltage output 1 output 2 (2 sec. AC) Minimum rating of RGon Minimum rating for RGoff Max. rating for gate Ta = 85 C charge per pulse Ta = 55 C Operating temperature Storage temperature Values 15,6 VS + 0,3 2 20 50 900 15 2500 1500 10 10 0,7 1 - 40 ... + 85 - 40 ... + 85 Units V V A mA kHz V kV/s V V C C C C SEMIDRIVERTM Sixpack IGBT and MOSFET Driver SKHI 61 VCE dv/dt VisolIO Visol12 RGonmin RGoffmin Qout/pulse Top Tstg Features * CMOS-compatible input buffers at VDD=5V * Short-circuit protection by VCE-monitoring and Soft-turn-Off * Drive interlock top/bottom * Signal transmission by opto-couplers * Supply undervoltage protection (13V) * Error latch / output Characteristics Symbol VS ISO 1) ViT+ ViTRin VG(on) VG(off) RGE fASIC td(on)IO td(off)IO td(err) tpERRRESET tTD VCEstat tblank Cps MTBF w HxBxT Ta = 25 unless otherwise specified C, min. 14,4 160 4,0 1,5 60 14,9 -6,5 20 8 0,45 0,45 1,3 15 Conditions Supply voltage primary Supply current no load primary side normal op. Input threshold voltage (High) Input threshold voltage (LOW) Input resistance Turn on gate voltage output Turn off gate voltage output Internal gate-emitter resistance ASIC system switching frequency Input-output turn-on propagation time Input-output turn-off propagation time Error input-output propagation time Error memory reset time Interlock dead time adjustable Reference voltage for V CE-monitoring Blanking time Coupling capacitance primary-secondary Mean Time Between Failure T a = 40 C weight Dimensions typ. 15,0 max. Units 15,6 200 450 V mA mA V V k V V k MHz s s s s s V s pF 10 6 h g mm Typical Applications * Driver for IGBT and MOSFET modules in three-phase-bridge circuits, inverter drives, UPS-facilities, etc. 0,3 0,3 1,15 7 no interl ock 0,6 0,6 1,5 27 4,1 1) At Ta < -25C the current consumption can be 1,6 times the rated maximum current for the first three operating minutes. 5,8 3,5 40 1 95 20x57x 114 2 Driver Electronic - PCB mountable 11-11-2005 (c) by SEMIKRON SKHI 71 ... Absolute Maximum Ratings Symbol Conditions VS ViH IoutPEAK IoutAVmax fmax Supply voltage primary Input signal voltage Output peak current Output average current (Ta = 85 C) Max. switching frequency (CGE < 9nF) Collector emitter voltage sense across the IGBT (for 1200V-IGBTs) Rate of rise and fall of voltage (secondary to primary side) Isolation test voltage input - output (2 sec. AC) Isolation test voltage output 1 output 2 (2 sec. AC) Minimum rating of RGon Minimum rating for RGoff Max. rating for gate Ta = 85 C charge per pulse Ta = 55 C Operating temperature Storage temperature Values 15,6 VS + 0,3 2 20 50 900 15 2500 1500 10 10 0,7 1 - 40 ... + 85 - 40 ... + 85 Units V V A mA kHz V kV/s V V C C C C SEMIDRIVERTM Sevenpack IGBT and MOSFET Driver SKHI 71 Preliminary Data VCE dv/dt VisolIO Visol12 RGonmin RGoffmin Qout/pulse Top Tstg Features * CMOS-compatible input buffers at VDD=5V * Short-circuit protection by VCE-monitoring and Soft-turn-Off * Drive interlock top/bottom * Signal transmission by opto-couplers * Supply undervoltage protection (13V) * Error latch / output Characteristics Symbol VS ISO 1) ViT+ ViTRin VG(on) VG(off) RGE fASIC td(on)IO td(off)IO td(err) tpERRRESET tTD VCEstat tblank Cps MTBF w HxBxT Ta = 25 unless otherwise specified C, min. 14,4 230 4,0 Conditions Supply voltage primary Supply current no load primary side normal op. Input threshold voltage (High) Input threshold voltage (LOW) Input resistance Turn on gate voltage output Turn off gate voltage output Internal gate-emitter resistance ASIC system switching frequency Input-output turn-on propagation time Input-output turn-off propagation time Error input-output propagation time Error memory reset time Interlock dead time Reference voltage for V CE-monitoring Blanking time Coupling capacitance primary-secondary Mean Time Between Failure T a = 40 C weight Dimensions typ. 15,0 max. Units 15,6 290 550 1,5 V mA mA V V k V V k MHz s s s s s V s pF 10 6 h g mm 5,0 60 14,9 -6,5 20 8 0,45 0,45 1,3 15 Typical Applications * Driver for IGBT and MOSFET modules in three-phase-bridge circuits, inverter drives, UPS-facilities, etc. 0,3 0,3 1,15 7 no interl ock 0,6 0,6 1,5 27 4,1 1) At Ta < -25C the current consumption can be 1,6 times the rated maximum current for the first three operating minutes. 5,8 3,5 40 1 99 20x57x 114 2 Driver Electronic - PCB mountable 11-11-2005 (c) by SEMIKRON PIN array Primary side PIN array Pin 01 02 03 04 05 06 07 08 09 10 Symbol Function BS BOT3 TOP3 BOT2 TOP2 BOT1 TOP1 _ERR BSS BSS Auxiliary earth connection Driver signal BOT HB3 Driver signal TOP HB3 Driver signal BOT HB2 Driver signal TOP HB2 Driver signal BOT HB1 Driver signal TOP HB1 _Error output Sixpack-driver System earth connection System earth connection Pin 11 12 13 14 15 16 17 18 19 20 Symbol +15V +15V TDT1 TDT2 SEL BSTD _ERRIN NC BRK _BERR Function Supply voltage Supply voltage Deadtime bit #1 Deadtime bit #2 Deadtime on/off Aux. earth for deadtime adjustment _External error signal input reserved Driver signal additional switch _Error output additional switch connection primary side connection secondary side Fig. 1 Bottom view of the SKHI 61 / SKHI 71 Secondary side PIN array Pin 01 02 03 Symbol Function RGate VCET 1 E Gate resistor input VCE-threshold #1 Emitter input Pin 04 09 Symbol Function VCET 2 VCE VCE-threshold #2 Collector input 1924 Driver Electronic - PCB Drivers 23-02-2004 (c) by SEMIKRON SEMIDRIVERTM SKHI 61 and SKHI 71 General properties and functions The SKHI 61 and SKHI 71 are 6- and 7-channel drivers for IGBT- and MOSFET-modules and can be soldered directly onto the PCB. The drivers are physically separated. Since all subassemblies necessary for operation have been integrated, there is no need for external components except for the gate resistors and the VCE-circuitry. VCE-thresholds and the blanking time are adjustable by integrating additional resistors and capacitors according to the customer's specifications. Interlocking time can be adjusted by simple bridging of connector pins. The driver is equipped with a separate error input for immediate turn-off when receiving error signals from external components (e.g. over-temperature). The independent seventh driver channel of the SKHI 71 guarantees for simple realisation of brake chopper, boost converter or PFC-circuit applications. By bridging of connector pins the driver error signal is transmitted directly to the SIXPACK-driver for turn-off. Technical information I. Primary side The driver input signals may be transmitted directly to the driver inputs by the controller. The input signal circuit was designed to accept a wide voltage range (see table 1). The typical voltage level is at HCMOS level of VDD=5V (0V=Off, +5V=On). However, also 15V-signals may be applied with the same turn-on/turn-off thresholds without additional requirements. In this case the input resistance will be different (see table 1). Status ON 5V ON 15V OFF 0V Error output signals i) 6pack - driver The error signal of the 6-PACK driver is equipped with an active push-pull output buffer which switches towards zero Volt in case of an error and actively towards + 5 V under operating conditions. The error memory may only be reset, if no error is pending and all cycle signal inputs are set to LOW for t > 9 s at the same time. If any other external signals are intended to be connected to the error signal _ERR, the _ERR-signal must be uncoupled (see Figure 2) . Fig. 2 _ERR-Signal in an open-collector"-circuit State Level / V _ERROR min Error No error 0 4 I / mA max 5 5 Typical error memory set back time 6-PACK 16s max 0.8 5 seventh driver 7s Table 2: Error output signal ratings Level / V min 4,0 4,0 -0,7 typ 5,0 15,0 0 max 5,5 15,6 1,5 Input Impedance Ch. 1-6 60 k 7 k 60 k Ch7 2,4 k 1,6 k 2,4k ii) chopper driver (only SKHI 71) The error output signal of the additional driver has been designed as an open collector output. A pull-up resistor against the controller's +VCC has to be connected to the controller input for error indication. In case of error, the signal is turned towards earth (zero Volt/ active LOW), otherwise the output will be highly resistive. The error signal of the additional switch will only be active as long as the input signal is on High-level. It is not logically connected to the other six input signals. The error signal of the additional switch may also be directly connected to the error input of the SIXPACK-driver, without requiring an external pull-up resistor. This may be advantageous, if the SIXPACK-driver has to be turned off in case of e.g. a brake chopper error or if only one error signal is evaluated by the controller. Driver Electronic - PCB Drivers 1925 Table 1: Input voltage level and input impedances Error input signal The error input signal can gather error signals of other hardware components, such as temperature sensors, in a "wired-or"-connection for direct turn-off of the driver. In this case an external pull-up resistor must not be connected. Note: It is not possible to connect the error output of the SKHI 61/71 to an error input of the SKHI 61/71. But the error output of the chopper driver (SKHI 71) can be connected directly to the error input. (c) by SEMIKRON 23-02-2004 Configuration pins The configuration pins serve to adjust the TOP/BOTTOM interlocking time of all halfbridges. Due to the special pin design the interlocking time can be adjusted by a simple connection to the BSTD terminal (BSS potential) on the PCB without requiring external components. Pin TDT1 TDT2 SEL t blank [ s ] ( 72,75 + R VCE [ k ] ) C VCE [ nF ] = --------------------------------------------------------------------------------- - 0,1 ( R V CE [ k ] + 4,75 ) 36,08 11, 86 R VCE [ k ] = ------------------------------------- - 4,75 5, 4 - 0,93 V CE Equation 1 4s 3 s (factory set) open open open open GND open 2 s GND open open 1 s GND GND open no inter-loc k )+ X X GND Equation 2 The VCE-threshold cannot be increased, so that the preset value of 5,8 V is the maximum value. VCE-monitoring can also be suppressed by connecting the collector pin VCE of one driver to the belonging emitter pin E and not to the collector of the power semiconductor. 5V 0V 5V BOT 0V 5V 0V Error t TD t dIO t pERRESET TOP Table 3: Values for interlocking time adjustment X" = no effect )+ TOP and BOTcan be switched simultaneously! t dERR Vce- ERROR with Soft Turn Off II. Secondary side We have provided for five terminals per input. Two of them are required for driving the IGBT, one is for short-circuit protection. The remaining two have been designed for optional adjustment of the VCE-threshold. IGBT-driver signals We have provided for one gate- and one emitter input pin per power switch, i.e. there is one gate resistor for turn-on and turn-off each. The earth connection of the driver is directly connected to the IGBT's emitter via the emitter input, whereas a resistor of at least 10 has to be connected to the gate circuit. This resistance is the minimum limit value controlled by the driver output buffer in order to limit the pulse currents to their peak value. A 20 k-resistor has been interconnected between gate and emitter (for the case that the supply voltage breaks down). Gate-Emitter-voltage min OFF (neg.) ON Temperature drift -10 14,4 12 14,9V 0V -6,5V TOP Gate- Emitter 14,9V 0V -6,5V BOT Gate- Emitter tblank+0,3us tsoft turn off t>t TD Fig. 3 Course diagram: TOP and BOT-inputs and signal Error compared to TOP and BOT-Gate-Emitter-signal (valid for all halfbridges). Typ -6.5 14,9 14 max -5 15,4 16 Unit V V mV/K Table 4: Gate-emitter-voltage at TA = 25 C VCE -threshold and VCE -monitoring VCE-monitoring is done by connection of the driver collector pin to the collector of the power semiconductor. If the turn-off threshold for short-circuit protection is to be reduced (standard 5,8 V), a resistor has to be connected between the VCET1-threshold#1 pin 2 and VCET2threshold#2 pin 4 (see fig. 4; Value to be calculated by equation 1). Please do not forget to adapt the blanking time1 accordingly. This can be done by attaching a capacitor (value to be calculated by equation 2) between VCE-threshold (pin 2) and earth (pin 3). The VCE-threshold may be adjusted to a minimum value of about 3 V (RVCE = 0 ). 1. Blanking time: time between turn-on semiconductor and V CE-registration of the power Fig. 4 Connection principle of a power switch with a specifically adjusted V CE-threshold 60 kHz 50 kHz switching frequency 40 kHz 30 kHz Ta = 85 C 20 kHz Ta = 55 C 10 kHz 0 kHz 0,0 C 0,1 C 0,2 C 0,3 C 0,4 C 0,5 C 0,6 C 0,7 C 0,8 C 0,9 C 1,0 C 1,1 C 1,2 C gate charge Fig. 5 Maximum rating for output gate charge per pulse 23-02-2004 (c) by SEMIKRON 1926 Driver Electronic - PCB Drivers * VCE-threshold : 4,8 V * Interlocking time : 2 s * Error blanking time for VCE-threshold : 4 s 15 Application Hints To adjust different VCE thresholds there is needed an additional resistor RVCE and a capacitor C VCE for each switch. Fig. 6 Maximum cycling frequency at QGE = 1000 nC vs temperature The application range can be calculated by the average output current of 20 mA and the repetetive acceptable peak current of 2 A. It has to be considered that the curves are valid for Qgmax = 1 C only. The maximum switching frequency fmax may be calculated with the following formula, the maximum value however being 50 kHz due to switching reasons: fmax (kHz) = 2*104 / QGE (nC) Gate resistor : VCE-threshold resistor: RG = 33 intended UVCE = 4,8 V Applying equation 1 RVCE will result in 11,86 R VCE [ k ] = ---------------------------------- - 4,75[k ] = 7,9k 5,4 - 0,93 4,8 Next value taken from the E24-range: 8,25 k. The threshold voltage is recalculated with 8,25 k. VCE-threshold at 4,82 V. For the capacitor the blanking time may be calculated as: tblanking = 4 s 4 ( 72,75 + 8,25 ) C V CE [ nF ] = ------------------------------------------------- - 0,1 = 590pF ( 8,25 + 4,75 ) 36,08 operating the SKHI 61: besides the operating voltage only the six driver signals TOP1...BOT3 and the driver error output signal are connected to the controller on the primary side. The secondary side is working with the preset VCE-threshold of 5,8 V. Fig. 7 and 8 show examples for connection of a SKHI 71 for the application with MiniSKiiP (SKiiP 32 NAB 12) and the following adjustments: * Temperature monitoring of the power semiconductor Thus there can be chosen a capacitor of 680 pF. Fig. 7 SKHI 61 block diagram (c) by SEMIKRON 23-02-2004 Driver Electronic - PCB Drivers 1927 Fig. 8 Examply circuit for a SKHI 71 connected to the primary side NOTE: If the _ErrorOut-signal of the additional switch (here brake chopper) is also needed for other evaluations, a Schottky diode has to be connected as shown in the figure above to uncouple the signal. Furthermore there has to be connected a pull-up resistor to the additional error output. It is useful to use a capacitor (typ. 100 pF, absolute maximum 2,2 nF) at the _ErrorIn to avoid undesired couplings. Fig. 9 Dimensional drawing, layout View: tooling side (top view, driver put on top of the PCB) Measurements taken in [mm] Grid of connector pins; gaps between pins: RM2,54 Pin dimensions : 0,64 mm x 0,64 mm ; length 3,2 mm 1928 Driver Electronic - PCB Drivers 23-02-2004 (c) by SEMIKRON Fig. 10 Measurements in [mm] for solder pads (as a proposal for the design) and solder pad gaps (partial drawing) This technical information specifies devices but promises no characteristics. No warranty or guarantee expressed or implied is made regarding delivery, performance or suitability. (c) by SEMIKRON 23-02-2004 Driver Electronic - PCB Drivers 1929 |
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