2ED300C17-ST

EiceDRIVER™ EiceDRIVER 2ED300C17-S 2ED300C17-ST Dual IGBT Driver for Medium and High Power IGBTs Datasheet and Application Note Prepared by : M.Hornkamp Approved by: Reg.Nr.064-02 SN: 23925 SN:24816 Date of publication: 16.05.2003 Revision: 3.0 Status: preliminary eupec GmbH Max-Planck-Straße 5 D-59581 Warstein Author:Michael Hornkamp Tel. +49(0)2902 764-0 Fax +49(0)2902 764-1150 Email: info@eupec.com www.eupec.com Technical Information EiceDRIVER™ 2ED300C17-S preliminary Passing on of this document or its contents to company external personnel requires written consent. Usage and copying of the contents to other media is prohibited. Violations will be prosecuted for damages. All rights reserved, including such arising from issue of patents or registration of trade marks or design. © eupec GmbH 2002. All rights reserved. Correspondence of the contents of this document with the described hardware has been checked. Discrepancies may exist nevertheless; no guaranty is assumed for total congruence. The information contained in this document is subject to regular revision. Any alterations required will be incorporated in the next issue. Suggestions for improvement are welcome. Changes of the document may occur without prior notice. Safety notice! It must be prevented that children and the general public have access to the installed driver or can get into proximity! The driver may only be used for the purposes prescribed by the manufacturer. Inadmissible alterations and use of spare parts and accessories not recommend by the manufacturer of the driver can cause fire, electric shock and injuries. This document has to be at the disposal of all users, developers and qualified personnel who are to work with the driver. If measurements and tests on the live device have to be carried out, then the regulations of the Safety Code VBG 4.0 are to be observed, in particular § 8 “Admissible deviations during work on live parts“. Suitable electronic devices are to be used. Prior to installation and commissioning please read this document thoroughly. • Commissioning is prohibited if there is visible damage by inappropriate handling or transport. • Contact while uninstalled is permitted only with ESD protection. • Install only without supply voltage. • Always keep sufficient safety distance during commissioning without closed protective housing. • Contact under live condition is strictly prohibited. • Work after turn-off is not admissible until the absence of supply voltage has been verified. • During work after turn-off it has to be observed that components heat up during operation. Contact with these can cause burning. • The drivers are mounted electrically and mechanically into a mother board by soldering. The mechanical strength has to be verified by the user and, if necessary, assured with appropriate tests. • The drivers are designed for use with eupec IGBT Modules type IHM, EconoPACK+, 62mm. In case of ulterior use, safe operation cannot be guaranteed. www.eupec.com www.EiceDRIVER.com Page 2 Technical Information EiceDRIVER™ 2ED300C17-S General Information 2ED300C17-S: preliminary This datasheet describes the dual channel IGBT driver 2ED300C17-S for industrial application and the 2ED300C17-ST for traction application. The Drivers are separated in two temperature classes –25°C for the 2ED300C17-S and –40°C for the 2ED300C17ST. The electrical function and the mechanic dimension are in both version similar. Only if there is a different in the types the 2ED300C17-ST is called. The 2ED300C17-S is one of the EiceDRIVERTM driver family. (eupec IGBT controlled efficiency DRIVER). The 2ED300C17-S IGBT driver is designed for use with eupec IGBT modules of the 1200V and 1700V series. Functions of the 2ED300C17-S such as the “soft shut down” or the VCEsat reference curves have to be adapted to the individual modules. This is described in the following chapters. The 2ED300C17-S is designed for applications with high safety and reliability requirements and aims for power ratings of 75kW to 1MW. To offer high interference suppression, +15V is generally used for control. The entire logic processing is also done with +15V. The integrated transformer is separated into three sections: Two pulse transformers and a dual channel DC-DC switch mode power supply. These are designed such that they offer lowest coupling capacitances and high isolation stability. The 2ED300C17-S is additionally equipped with a feed-back ”Sense” input. This input can optionally be connected with the active clamping or di/dt and dv/dt control. The clearance and creepage distances comply with VDE0110 and VDE0160 / EN50178 and are designed for pollution degree 3. Materials of the transformer meet requirements of UL94V0. Protection degree IP00. To protect from undefined switching of IGBTs in case of a gate-emitter short circuit of another IGBT, the supply voltage VA;B+; VA;B- is internally monitored in the driver for short circuit currents. In case of a gate-emitter short the secondary circuit is interrupted and thus the primary voltage maintained. Exclusion clause: The datasheet is part of the eupec IGBT driver 2ED300C17-S. To guaranty safe and fault free operation it is necessary to have read and understood this datasheet. The eupec IGBT driver 2ED300C17-S is only intended for control of eupec IGBT modules. The company eupec GmbH cannot warrant against damage and/or dysfunction if IGBT modules used not produced by eupec. In this context, eupec GmbH retains the right to change technical data and product specifications without prior notice to the course of improvement. www.eupec.com www.EiceDRIVER.com Page 3 Technical Information EiceDRIVER™ 2ED300C17-S Chapter: •Safety notice •General information •Exclusion clause •Contents 1. 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 1.10 2. 2.1 3. 3.1 3.1.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 4. 4.1 4.2 4.3 www.eupec.com Datasheet •Features •Key data •Block diagram •Inputs and outputs •Pin configuration •Maximum permissible values •Characteristic values •Max. switching frequency at different rated currents •Mechanical dimensions The transformer • Safe electrical isolation Protection Class II according to EN50178 Application of the 2ED300C17-S •Power supply •Use of the internal over-current shut-down •Mode selection •Interlock delay times •Logic levels (reset; fault output) •Signal level •IGBT connection •IGBT Shot circuit / IGBT overload shut down •SSD “soft shut down” •External fault input •“Sense” input (SSD and active clamping) •Additional output voltage / buffer capacitors •Application example 2ED300C17-S General Designation and symbols Module internal gate resistors Type designation www.EiceDRIVER.com preliminary Page 2 3 3 4 5 5 5 6 6 7 8 9 10 11 12 12 13 13 14 15 16 17 17 20 23 25 25 27 28 29 29 30 32 Page 4 Technical Information EiceDRIVER™ 2ED300C17-S 1.2 Features • Dual channel IGBT driver 2ED300C17-S • For 1200V / 1700V eupec IGBT modules • VCE sat monitoring • “Soft Shut Down” for fault conditions • Save electrical isolation according to EN50178 • Integrated DC-DC SMPS • High peak output current • ±15V secondary drive voltage • Short signal transition time • Optional “Sence” function • High RFI immunity 1.3 Key data Isolation testing voltage according to EN50178 protection class II preliminary Visol pulse transformer and DC/DC 5000 ±30 4 6 >14 mm mm mm Clearance distance and creep page Primary/ Secondary Clearance distance Secondary/ Secondary Creep page Secondary/ Secondary Max.25mm 20mm d=1mm PCB d=1mm www.eupec.com www.EiceDRIVER.com Page 11 Technical Information EiceDRIVER™ 2ED300C17-S 2. The transformer 2.1 Safe electrical isolation Protection Class II according to EN50178 preliminary The safe isolation between primary and secondary side of the two transformers and the switch mode power supply is the basis for the 2ED300C17-S. Highly insulated coil wires, core insulated ferrites and a special sealing compound (UL94 V-0) are used for this purpose. The design makes sure that all windings are physically separated from each other. There are no overlapping primary and secondary windings. The winding connections are terminated directly to the pins which are cast into the housing. All that is contained in a plastic housing certified to UL 94. 16 9 1 8 Figure 2.1 Complete transformers with cores in position The transformer is designed for use in industrial and traction applications. The test voltage applied between all inputs and all outputs is 5kV AC for 1 second. The test voltage applied between the secondaries is 2.25kV AC for 1 second. (EN50178 Table18) (Individual test) The insulation test is completed by the surge voltage test stipulated by EN50178. Surge voltage test according to (EN50178 table 17) is 1.5/50µs with 9.6kV. The partial discharge extinction voltage stipulated by the standard (EN50178 table19) is above 1763V crest value (type test). www.eupec.com www.EiceDRIVER.com Page 12 Technical Information EiceDRIVER™ 2ED300C17-S 3 Application of the 2ED300C17-S: preliminary 3.1 Power supply The 2ED300C17-S has an integrated DC-DC switch mode inverter, which generates the required secondary voltages. The generated voltages are for the top and bottom channel with +15V primaries each ±16V secondaries. Hence the 2ED300C17-S only requires one external power supply of +15V. The 2ED300C17-S is operated on a stabilized +15V (±1V) supply. It is distinguished between VDD and VDC. All inputs are switched with+15V,where VDC should be additionally stabilized by a capacitor CDC (see figure 3.1). This stabilizing capacitor CDC should be 220µF minimal. All GND pins have to be connected. To prevent a ground loop there is no internal connection of the DC-DC SMPS ground and the primary electronics. 10R 1µF +15V CDC 1 VDD +15V 2 VDD +15V 3 VDD +15V 4 Fault A 5 Reset 6 CA 7 IN B 8 CB 9 Modus 10 Fault B 11 IN A 12 GND 13 GND 14 VDC +15V 15 VDC +15V 16 VDC +15V 17 VDC +15V 18 VDC +15V 19 GND 20 GND 21 GND 22 GND 23 GND Note! If the driver is turned on with +15V, a low voltage fault may be tripped depending on the voltage slew rate. This will be reset after 50ms if both signal levels IN A and IN B remain Low during this time. Note! No potential difference greater than 20V may occur between VDD and VDC. Figure 3.1 Pin configuration of +15V voltage supply Note! The 2ED300C17-S features secondary under-voltage monitoring. If the secondary supply voltage drops below typical +12V or -12V, a fault condition will occur which turns off the driver and is transferred to the primary as well. www.eupec.com www.EiceDRIVER.com Page 13 Technical Information EiceDRIVER™ 2ED300C17-S 3.2 Mode selection preliminary The 2ED300C17-S features two operating functions to drive eupec IGBT modules. These are the direct mode and the half-bridge mode. • The direct mode: In this mode there is no link between the two channels of the 2ED300C17-S. Both channels IN A and IN B are working independently from each other and may both be turned on at once. The inputs IN A and IN B are switched with +15V PWM signals. The direct mode is activated by taking pin 9 ”Mode selection” to GND (e.g.: pin 12/13). The inputs CA pin 6 and CB pin 8 are not connected. Note! In the direct mode the inputs CA and CB may not be connected to +15V or GND. For EMC reasons it is recommended to connect the inputs CA and CB with 470pF to GND. • The half-bridge mode: This mode generates an interlock time between the two channels of the 2ED300C17-S. I.e. there is always only one channel active. The interlock time between the switching events may be selected. This is done with the inputs CA pin 6 and CB pin 8. The half-bridge mode is activated by taking pin 9 ”Mode selection” to VDD (pin 1/2/3). The inputs IN A and IN B are switched with PWM inputs. Explanation: There is always only one channel turned on. If there is a high signal on one channel, this is turned on after the interlock time has ended. If during this time there is a high signal for the second channel it will be ignored until the first turned on channel has turned off. PWM IN A PWM IN B +15V 0V +15V 0V Gate A +15V -15V Gate B +15V -15V Figure 3.2 Switching diagram with interlock delay times www.eupec.com www.EiceDRIVER.com Page 14 Technical Information EiceDRIVER™ 2ED300C17-S 3.3 Interlock delay times preliminary In half-bridge mode the 2ED300C17-S generates a minimal internal interlock delay time between the two channels. This minimal interlock time tTD is preset to 1,6 µs. By adding a capacitance to the two inputs CA and CB this interlock time is extended and adapted to the requirements of the application. The capacitance is externally added between CA and CB to GND (see page 7 – 1.6 Pin configuration). The capacitance for the required interlock time is derived from the following table: Del. time TTD 1,6µs 2µs 2,4µs 3.4µs 4,3µs 5,4µs 9,6µs CA / CB n.c. 47pF 100pF 220pF 330pF 470pF 1nF NOTE ! It is not permit to connect the inputs CA and CB direct to a voltage potential. NOTE ! The tolerance of the interlock delay times depends mainly on the tolerance of the external capacities. This needs to be considered when choosing the capacitors! Table 3.3 Interlock delay time settings Pin 6 CA Pin 8 CB Secondary Side A Pulse Transformer Ca Cb Primary Side DC/DC Pin 12 GND Pin 13 GND Secondary Side B Figure 3.3 Connection of the external capacitors to increase the interlock times www.eupec.com www.EiceDRIVER.com Page 15 Technical Information EiceDRIVER™ 2ED300C17-S 3.4 Logic level preliminary The term “logic level” concerns the fault output and the reset input as well as the input for operating mode selection described in chapter 3.2. • Logic inputs The two inputs (reset and mode) may be stressed with a maximum voltage of 20V. The switching threshold is at 8V, so the existing +15V offers itself as switching signal. 1) Mode: see chapter 3.2 2) Reset: The driver can be reset via the reset input after a fault has been indicated. The reset input is active high, i.e. a high signal activates the reset. Logic signal level is by 8V. If reset is used by the PWM inputs IN A and IN B, the reset input is inactive and pin 5 (Reset) has to be permanently connected to GND If both PWM signals are “low” for more than 39ms the driver is reset. • Logic outputs The driver core recognizes short circuit current faults of the IGBTs and faults of the supply voltage. Additionally the 2ED300C17-S features an external fault input. If a fault is detected through the VCE sat monitoring, an under-voltage or the external fault input, the driver core is immediately turned off. With these faults on the secondary side, the IGBT is shut down via a soft turn-off. Each fault is stored until a reset signal on Pin 5 is present. The reset is also activated when the input signal on both channels is low for more than 39ms. Indication of a fault occurs in any case via a common fault line on the logic output FAULT. The fault is brought out twice via Pin4 and Pin10. These outputs are configured as open collector. The outputs can operate at up to 20V and can switch a maximum of 20mA . If a fault is recognized the internal transistor switches and pulls the fault output to GND. +15V +15V 1 VDD +15V 2 VDD +15V 3 VDD +15V 4 Fault 5 Reset 6 CA 7 IN B 8 CB 9 Modus 10 Fault 11 IN A GND Figure 3.4 Fault output Note! The fault outputs are internally connected. There is only one fault output - doubled up. www.eupec.com www.EiceDRIVER.com Page 16 Technical Information EiceDRIVER™ 2ED300C17-S 3.5 Signal level preliminary In both the direct mode and the half-bridge mode the input IN A of the 2ED300C17-S controls channel A, and input IN B controls channel B. The inputs feature a SchmittTrigger and an active high logic. A high level turns the IGBT on and a low level turns it off. The two signal inputs may be operated with a maximum of 20V per channel. Brief negative peaks of equal voltage will not lead to damage of the inputs. The switching threshold is at +8V to GND. The input impedance is 3.3kOhm for each channel. For long cables it may be necessary to connect an external burst suppression network. Note: The 2ED300C17-S features a minimal pulse suppression. Pulses with less than 400ms will be suppressed by the driver. 1 VDD +15V 2 VDD +15V 3 VDD +15V 4 Fault 5 Reset 6 CA 7 IN B 8 CB 9 Modus 10 Fault 11 IN A 12 GND 13 GND 14 Vdc +15V 10µH Figure 3.5 Input signal level PWM B PWM A 10µH 3.6 IGBT connection The 2ED300C17-S features two independent channels to drive the IGBTs. It is possible to drive individual IGBTs, single IGBT-modules or IGBT-modules connected in parallel. The maximum size of the IGBT-modules depends mainly on the IGBT input capacitance and on the switching frequency. This dependency is described on page 9 for KE3 modules. When considering the gate currents, note that these are not determined by the external gate resistors alone. Many eupec IGBT modules have internal gate resistors (See chapter 5). Additionally, the 2ED300C17-S features a low output impedance. Hence a gate current calculated via the external gate resistor will never be realized in practice. An approximation for the drive power and peak current can be achieved with: •Driver power P G = f ⋅ ∆ V GE 2 ⋅C ies ⋅3 P = P DD + PG • Max. driver current f = switching frequency Cies = input capacity (datasheet) PDD = driver dissipation IG max = ∆ V GE R G (min) ∆ V = 30 V at ± 15 V RG(min)=RG extern+RG intern Page 17 www.eupec.com www.EiceDRIVER.com Technical Information EiceDRIVER™ 2ED300C17-S •Gate connection preliminary The gate of the IGBT is connected to Gate A or Gate B via the external gate resistor. The associated auxiliary emitter is connected directly to the COM outputs. The gate output voltage is ±15V with respect to COM A and COM B (considering chapter 3.1). By utilizing the external gate resistors it is possible to realize turn-on and turn-off with different gate resistances. Additionally to the gate resistor a gate-emitter resistor and gate clamping should be used. These would be placed between the gate and the aux. emitter. As RGE a resistor