Eice DR IV ER ™ High voltage gate driver IC E valu atio n B oar d Application Note EV AL_ 1E D02 0I1 2 - BT Applic atio n N ote Revision 1.0, 2013-07-26 Infin eon T echnol ogi es A G Edition 2013-07-26 Published by Infineon Technologies AG 81726 Munich, Germany © 2013 Infineon Technologies AG All Rights Reserved. LEGAL DISCLAIMER THE INFORMATION GIVEN IN THIS APPLICATION NOTE IS GIVEN AS A HINT FOR THE IMPLEMENTATION OF THE INFINEON TECHNOLOGIES COMPONENT ONLY AND SHALL NOT BE REGARDED AS ANY DESCRIPTION OR WARRANTY OF A CERTAIN FUNCTIONALITY, CONDITION OR QUALITY OF THE INFINEON TECHNOLOGIES COMPONENT. THE RECIPIENT OF THIS APPLICATION NOTE MUST VERIFY ANY FUNCTION DESCRIBED HEREIN IN THE REAL APPLICATION. INFINEON TECHNOLOGIES HEREBY DISCLAIMS ANY AND ALL WARRANTIES AND LIABILITIES OF ANY KIND (INCLUDING WITHOUT LIMITATION WARRANTIES OF NON-INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OF ANY THIRD PARTY) WITH RESPECT TO ANY AND ALL INFORMATION GIVEN IN THIS APPLICATION NOTE. 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Infineon Technologies components may be used in life-support devices or systems only with the EiceDRIVER™ Driver IC Evaluation Board EVAL_1ED020I12-BT Application Note Revision History: 2013-07 Rev.1.0 Page or Item Subjects (major changes since last revision) Previous Version: 1.0 Trademarks of Infineon Technologies AG AURIX™, C166™, CanPAK™, CIPOS™, CIPURSE™, EconoPACK™, CoolMOS™, CoolSET™, CORECONTROL™, CROSSAVE™, DAVE™, DI-POL™, EasyPIM™, EconoBRIDGE™, EconoDUAL™, EconoPIM™, EconoPACK™, EiceDRIVER™, eupec™, FCOS™, HITFET™, HybridPACK™, I²RF™, ISOFACE™, IsoPACK™, MIPAQ™, ModSTACK™, my-d™, NovalithIC™, OptiMOS™, ORIGA™, POWERCODE™, PRIMARION™, PrimePACK™, PrimeSTACK™, PRO-SIL™, PROFET™, RASIC™, ReverSave™, SatRIC™, SIEGET™, SINDRION™, SIPMOS™, SmartLEWIS™, SOLID FLASH™, TEMPFET™, thinQ!™, TRENCHSTOP™, TriCore™. Other Trademarks Advance Design System™ (ADS) of Agilent Technologies, AMBA™, ARM™, MULTI-ICE™, KEIL™, PRIMECELL™, REALVIEW™, THUMB™, µVision™ of ARM Limited, UK. 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SPANSION™ of Spansion LLC Ltd. Symbian™ of Symbian Software Limited. TAIYO YUDEN™ of Taiyo Yuden Co. TEAKLITE™ of CEVA, Inc. TEKTRONIX™ of Tektronix Inc. TOKO™ of TOKO KABUSHIKI KAISHA TA. UNIX™ of X/Open Company Limited. VERILOG™, PALLADIUM™ of Cadence Design Systems, Inc. VLYNQ™ of Texas Instruments Incorporated. VXWORKS™, WIND RIVER™ of WIND RIVER SYSTEMS, INC. ZETEX™ of Diodes Zetex Limited. Last Trademarks Update 2011-11-11 Revision 1.0, 2013-07-26 EiceDRIVER™ Driver IC Evaluation Board EVAL_1ED020I12-BT Application Note Table of Contents Table of Contents 1 Introduction ...................................................................................................................... 5 2 2.1 2.2 2.3 Design feature .................................................................................................................. 6 Main features...................................................................................................................... 6 Key data ............................................................................................................................. 7 Pin assignment ................................................................................................................... 8 3 3.1 3.2 3.3 3.4 3.5 3.6 3.7 Electrical features............................................................................................................. 9 Supply voltages +5V and +15V .......................................................................................... 9 Under voltage lockout ......................................................................................................... 9 VCEsat monitoring for short circuit detection.......................................................................... 9 Two level turn-off .............................................................................................................. 10 IGBT turn - on / off ............................................................................................................ 10 DC-Link capacitor ............................................................................................................. 13 Input PWM-Signals ........................................................................................................... 13 4 4.1 4.2 4.2.1 4.2.2 4.2.3 4.2.4 4.3 Schematic and Layout ................................................................................................... 14 Schematic ........................................................................................................................ 14 Layout .............................................................................................................................. 17 Creepage distance ........................................................................................................... 17 Layout top ........................................................................................................................ 17 Layout bottom................................................................................................................... 17 Top place ......................................................................................................................... 18 Bill of material ................................................................................................................... 19 Application Note 4 Revision 1.0, 2013-07-26 EiceDRIVER™ Driver IC Evaluation Board EVAL_1ED020I12-BT Application Note Introduction 1 Introduction The gate driver evaluation board EVAL_1ED020I12-BT was developed to show the functionalities and key features of the Infineon IGBT gate driver 1ED020I12-BT (also applied to 1ED020I12-FT). The board is available from Infineon in sampling quantities. The properties of this part are described in the datasheet chapter of this document, whereas the remaining paragraphs provide information intended to enable the customer to copy, modify and qualify the design for production, according to their own specific requirements. The design of the EVAL_1ED020I12-BT was performed with respect to the environmental conditions described in this document. The design was tested as described in this document, but not qualified regarding manufacturing, lifetime or over the full ambient operating conditions. The boards provided by Infineon are subjected to functional testing only. Due to their purpose Evaluation Boards are not subjected to the same procedures regarding Returned Material Analysis (RMA), Process Change Notification (PCN) and Product Discontinuation (PD) as regular products. These Evaluation Boards are used for development support only and should not be used as reference design for volume production. See Legal Disclaimer and Warnings for further restrictions on Infineons warranty and liability. Application Note 5 Revision 1.0, 2013-07-26 EiceDRIVER™ Driver IC Evaluation Board EVAL_1ED020I12-BT Application Note Design feature 2 Design feature This chapter provides an overview of the main features, key datas, pin assignments and mechanical dimensions 2.1 Main features Figure 2-1 top view of the 1ED020I12-BT_EVAL The EVAL_1ED020I12-BT contains two Infineon IGBT gate driver 1ED020I12-BT in a half bridge configuration driving two Infineon IGBT IKW25N120H3 in TO-247 package. The evaluation board provides the following main features Galvanic isolation by the coreless transformer technology of the Infineon gate driver. The 1ED020I12-BT is suitable for basic isolation Isolation inside the half bridge by defined creepage Short circuit protection Under voltage lock out Active miller clamp Isolated DC-DC-converter for bipolar supply of the gate driver output with typ. +15V/-7V Connector for 5V digital supply, 15V supply, Reset, High voltage supply, external load Status LED for 5V supply, 15V supply, ready and fault separated for high- and lowside driver DC link capacitor Application Note 6 Revision 1.0, 2013-07-26 EiceDRIVER™ Driver IC Evaluation Board EVAL_1ED020I12-BT Application Note Design feature 5V supply input with status LED HV-supply input ground V+HV Status LED Ready / Fault DC-link Discrete IGBT External load HV-supply input ground 15V supply input, Reset with status LED Figure 2-2 overview functionalities on top-side 2.2 Key data All values are values at an ambient temperature of 25°C. Table 2-1 Parameter Description Typ. min max Unit +15V 5V HV IOut IGmax RGmin 15 5 - 13 4.5 15 17.5 5.5 800 25 2 - V V V A A 15V voltage supply 5V voltage supply High voltage supply Output current Max. peak gate driver output current Min. gate resistor to limit gate driver output current Ω * Please make sure that the maximum rated values never get exceeded. Also the performance and quality can not be guaranteed when using the board with all parameters in maximum rated value at the same time. Application Note 7 Revision 1.0, 2013-07-26 EiceDRIVER™ Driver IC Evaluation Board EVAL_1ED020I12-BT Application Note Design feature 2.3 Pin assignment Table 2-2 Connector name Pin no. Pin name Description RESET Right terminal Left terminal /RST GND same as X1-B1 same as X1-A16 +5V (VCC1) Left terminal Right terminal +5V GND positive 5V logic supply same as X1-A16 +15V (VCC2) Left terminal Right terminal +15V GND positive 15V supply for secondary side X1 A16 B1 B2 B5 B6 B7 B8 B16 GND /RST /FLT IN-T IN-B IN+T IN+B +5V reference for 5V supply and input signals input – 0V to reset circuit output combined /Fault_T, /Fault_B, 0..5V inverting input top IGBT; internal pull up inverting input bottom IGBT; internal pull up non-inverting input top IGBT; 0V off; 5V on non-inverting input bottom IGBT; 0V off; 5V on positive 5V supply reference for high voltage supply (Power-GND, internally connected to GND) positive high voltage supply (up to 800V related to GND_HV) GND_HV V+HV OUT Application Note Output HV half bridge (related to GND_HV) 8 Revision 1.0, 2013-07-26 EiceDRIVER™ Driver IC Evaluation Board EVAL_1ED020I12-BT Application Note Electrical features 3 Electrical features 3.1 Supply voltages +5V and +15V The supply voltage for the digital part (+5V VCC1) and for the driver output (+15V VCC2) has to be supplied externally over the dedicated connectors. The evaluation board does not provide an over voltage supply monitoring, therefore the user has to ensure that the voltages are in the correct range. Voltages above the max values will lead to damages of the IGBT drivers. The availability of the supply voltages is visible over the green status LEDs. The gate driver output of the 1ED020I12-BT is supplied with +15V (VCC2) and -7V (VEE2) by an isolated DC/DC-power supply which is integrated in the evaluation board. The negative supply at VEE2 prevents a parasitic turn on of the gate by switching on the opposite IGBT. The use of the negative voltage makes the clamp “Active Miller Clamp” functionality unnecessary. 3.2 Under voltage lockout The +15V supply VCC2 is monitored by the 1ED020I12-BT. In case of an undervoltage of <13V at VCC2 the driver output is switched off. This status is visible over the yellow READY LEDs for top and bottom side. If the LED is on, the supply at VCC2 is >13V 3.3 VCEsat monitoring for short circuit detection The Infineon gate driver 1ED020I12-BT provides a short circuit detection by measuring the VCEsat voltage of the IGBT. If a short circuit occurs, the collector current and the saturation voltage increase. If the IGBT is commanded on stated and the VCE reaches 9V a short circuit is detected and the gate driver output is switched off. This status is reported by the /FLT signal and the dedicated FAULT LED is switched on. Figure 3-1 shows the signals of the bottom side driver and IGBT during a shoot through. VCEsat VGE IC Figure 3-1 the signals of the bottom side driver and IGBT during a shoot through (Ic curve with 1.2µs delay due to slow current probe) The FAULT status is latched by the 1ED020I12-BT and must be resetted by switching the RESET Signal to ground. Application Note 9 Revision 1.0, 2013-07-26 EiceDRIVER™ Driver IC Evaluation Board EVAL_1ED020I12-BT Application Note Electrical features 3.4 Two level turn-off The Two Level Turn-Off functionality introduces a second voltage level at the driver output in between ON- and OFF-level. This ensures lower VCE overshoots at turn off by reducing the VGE of the IGBT at short circuits or over current events. The reference voltage level and hold up time can be adjusted at pin TLSET of the 1ED020I12-BT. The reference voltage is set by the Zener diodes D7T and D7B. The holdup time is set by the capacitance connected between pin TLSET and Gnd2. Figure 3-2 the components connected to pin TLSET of the 1ED020I12-BT bottom In this case, the second voltage level is set to 10V by the Zener diodes and the holdup time is approximately 2.4µs with a capacitance of 47pF at pin TLEST. For more detailed information please refer to the datasheet of the 1ED020I12-BT available on the Infineon webpage. Figure 3-3 shows the discharging and charging of the external capacitor C7B to set up the two level turn-off. VGE_bot VCEsat TLSET with 10V and 2,4µs Second turn-off level with 10V and 2,4µs IC VTLSET Figure 3-3 the signal at TLSET before a shoot through event It is visible that there is second voltage level at the VGE_bot during turn-off. This level has the same values like the signal at pin TLSET with 10V and ~2.4µs. 3.5 IGBT turn - on / off The switching characteristic of the IGBTs is defined by the gate resistors RG1B, RG1T, RG2B and RG2T. Application Note 10 Revision 1.0, 2013-07-26 EiceDRIVER™ Driver IC Evaluation Board EVAL_1ED020I12-BT Application Note Electrical features Figure 3-4 bottom side driver output The gate resistors are adapted to the Infineon IGBT IKW25N120H3 to get signals with less oscillation as possible by keeping a fast slope at the output. There is the possibility to adapt the switching characteristic to specific applications or to different IGBTs by replacing the values of RG1B and RG1T. The use of RG2B and RG2T together with DG1B and DG1T makes it possible to change the onswitching and the off-switching slopes of the IGBT independent to each other. To avoid a shoot through between top- and bottom IGBT, the operator needs ensure sufficient dead time. With this setup the dead time should be > 1.5µs. Switching sequence with 3 pulses and the following parameters: VCE_bot Supply Input: 300V VGE_bot VGE_top Duty cycle = 80% referred to the top IGBT Load = R/L with about 900µH and 2.3Ohm IC Load connected between OUT and V+HV Figure 3-5 overview switching sequence with 3 pulses Application Note 11 Revision 1.0, 2013-07-26 EiceDRIVER™ Driver IC Evaluation Board EVAL_1ED020I12-BT Application Note Electrical features VCE_bot VGE_bot IC Figure 3-6 turning off bottom IGBT VCE_bot VGE_bot IC Figure 3-7 turning on bottom IGBT VCE_bot VGE_bot VGE_top IC Figure 3-8 turning off bottom IGBT and turning on top IGBT with delay of 2.5µs Application Note 12 Revision 1.0, 2013-07-26 EiceDRIVER™ Driver IC Evaluation Board EVAL_1ED020I12-BT Application Note Electrical features 3.6 DC-Link capacitor Due to the available space there is only a small DC-Link capacitor of 220nF available. If a bigger DCLink capacity is necessary it has to be connected externally to the connectors V+HV and GND_HV. 3.7 Input PWM-Signals The PWM input pins of the 1ED020I12-BT can be configured in non-inverting input logic or inverting input logic. IN+ Non Inverting Driver Input IN+ control signal for the driver output if IN- is set to low, e.g. the IGBT is on if IN+ = high and IN- = low IN- Inverting Driver Input IN- control signal for the driver output if IN+ is set to high, e.g. the IGBT is on if IN- = low and IN+ = high The EVAL_1ED020I12-BT is designed in that way, that the non-inverting input is used. There is the possibility to use also the inverting input logic by replace RIN1T, RIN1B and RP1T and RP1B. Figure 3-9 bottom side driver input There is also the possibility to use low pass filters inside the PWM input signals to avoid a undesired switch on an IGBT by disturbances. This feature is not used in this evaluation board, but there is the possibility to test it by changing the resistors RIN1T, RIN1B, RIN2T, RIN2B and the capacitors CIN1T, CIN1B, CIN2T, CIN2B. Application Note 13 Revision 1.0, 2013-07-26 EiceDRIVER™ Driver IC Evaluation Board EVAL_1ED020I12-BT Application Note Schematic and Layout 4 Schematic and Layout 4.1 Schematic Figure 4-1 HV supply input and DC-Link Figure 4-2 LV Supply and Reset Input Application Note 14 Revision 1.0, 2013-07-26 EiceDRIVER™ Driver IC Evaluation Board EVAL_1ED020I12-BT Application Note Schematic and Layout Figure 4-3 connector X1 Figure 4-4 Infineon driver 1ED020I12 top and bottom Application Note 15 Revision 1.0, 2013-07-26 EiceDRIVER™ Driver IC Evaluation Board EVAL_1ED020I12-BT Application Note Schematic and Layout Figure 4-5 DC/DC-converter Figure 4-6 LEDs, FAULT and READY logic Application Note 16 Revision 1.0, 2013-07-26 EiceDRIVER™ Driver IC Evaluation Board EVAL_1ED020I12-BT Application Note Schematic and Layout 4.2 Layout 4.2.1 Creepage distance The isolation between input and output is ensured by the coreless transformer of the 1ED020I12-BT IGBT gate driver. The creepage distance ensured by the layout is 8mm between low- and high voltage supply and 2.4mm inside the high voltage supply area. 4.2.2 Layout top Figure 4-7 Layout top of the EVAL_1ED020I12-BT 4.2.3 Layout bottom Figure 4-8 Layout bottom of the EVAL_1ED020I12-BT Application Note 17 Revision 1.0, 2013-07-26 EiceDRIVER™ Driver IC Evaluation Board EVAL_1ED020I12-BT Application Note Schematic and Layout 4.2.4 Top place Figure 4-9 top place view of the EVAL_1ED020I12-BT Figure 4-10 bottom place view of the EVAL_1ED020I12-BT Application Note 18 Revision 1.0, 2013-07-26 EiceDRIVER™ Driver IC Evaluation Board EVAL_1ED020I12-BT Application Note Schematic and Layout 4.3 Bill of material Part Value Package C1, C5 100nF/10V X7R SMD0603 C1B, C1T 1uF/10V X7R SMD0805 C2 100µF / 16V 6.3 x 6.3 x 7.7mm C2B, C2T, C4B, C4T 1µF/25V X7R SMD0805 C3B, C3T 220pF/25V X7R SMD0603 C5B, C5T, C6B, C6T, C15, C18 100nF/50V X7R SMD0603 C6 100nF/10V X7R SMD0805 C7B, C7T 47pF/25V X7R SMD0603 C11, C12, C13, C14, C19, C20, C21, C22, C23, C24 4u7F/25V X7R SMD1206 C16, C17 100pF/50V/COG SMD0603 C_BULK 220nF/1000V C22.5B10 D1, D2, D2B, D2T, D3B, D3T, D8, D9, D10, D11, D12, D13, D14 BAT165 SOD323F D1B, D1T STTH112U SMB_DO-214AA D7B, D7T D-ZENER-BZX384-C10 SOD323 R1B, R1T 1k SMD0805 R20 2k2 SMD0603 R21, R22 15R SMD1206 R23 0R15 SMD1206 R24 2k2 SMD1206 RG2B, RG2T 100R SMD1206 RIN1B, RIN1T, RP2B 0R SMD0603 RL1 820R SMD0805 RL2, RL3, RL4, RL5, RL6 RP2T 270R SMD0805 0R SMD0805 RP3B, RP3T, RP4B, RP4T, RP5 10k SMD0603 T1, T2 IKW25N120H3 TO247BH T3, T4 PMV45EN SOT-23 TL1, TL3 BCR192 SOT23 TL2, TL4 BCR142W SOT323 TR1 Trafo 1:1.2 T60403-D4615-X054 U$4 IR2085S SO-8 1ED020I12-BT_B, 1ED020I12-BT_T X1 1ED020I12-BT PG-DSO-16-15 FAB32Q2 FAB32Q2 +5V, +15V, RESET 22-23-2021 22-23-2021 GND_HV, OUT, V+HV !FAULT_B, !FAULT_T MKDSN1,5/2-5,08 MKDSN1,5/2-5,08 LED_RT CHIPLED_0805 15V, VCC LED_GN CHIPLED_0805 READY_B, READY_T LED_GE CHIPLED_0805 Application Note 19 Revision 1.0, 2013-07-26 w w w . i n f i n e o n . c o m Published by Infineon Technologies AG