High Voltage, Isolated IGBT Gate Driver with …

1 High Voltage, Isolated igbt gate Driver with Isolated flyback controller preliminary technical data adum4138 Rev. PrA Document Feedback Information furnished by analog devices is believed to be accurate and reliable. However, no responsibility is assumed by analog devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of analog devices .

2 Trademarks and registered trademarks are the property of their respective owners. One Technology Way, Box 9106, Norwood, MA 02062-9106, Tel: 2017 analog devices , Inc. All rights reserved. technical Support FEATURES 6 A peak drive output capability Output power device resistance: <1 Two overcurrent protection methods Desaturation detection Split emitter overcurrent detection Miller clamp output with gate sense input Isolated fault output Isolated temperature sensor readback Low propagation delay: 110 ns typical Minimum pulse width: 50 ns Operating junction temperature range ( 40 C to +150 C) Output and input UVLO Creepage distance.

3 >6 mm Safety and regulatory approvals 5000 V rms for 1 minute per UL 1577 CSA Component Acceptance Notice 5A DIN V VDE V 0884-10 (VDE V 0884-10):2006-12 VIORM = 849 V peak (reinforced/basic) APPLICATIONS MOSFET/ igbt gate drivers Photovoltaic (PV) inverters Motor drives Power supplies GENERAL DESCRIPTION The adum4138 is a single-channel gate Driver specifically optimized for driving insulated gate bipolar transistors (IGBTs). analog devices , Inc., iCoupler technology provides isolation between the input signal and the output gate drive.

4 The analog devices chip scale transformers also provide Isolated communication of control information between the high voltage and low voltage domains of the chip. Information on the status of the chip can be read back from dedicated outputs. The adum4138 includes an Isolated flyback controller to allow simple secondary voltage generation. Overcurrent detection is integrated onto the adum4138 to protect the igbt in case of desaturation and/or overcurrent events. The overcurrent detection is coupled with a high speed, two level, turn off in case of faults.

5 The adum4138 provides a Miller clamp control signal for an external metal-oxide semiconductor field effect transistor (MOSFET) to provide robust igbt turn off, with a single-rail supply when the Miller clamp voltage threshold drops below 2 V (typical) above GND2. Operation with unipolar secondary supplies is possible, with or without the Miller clamp operation. A low gate voltage detection circuit can trigger a fault if the gate voltage does not rise above an internal threshold within the time allowed from turn on.

6 The low voltage detection circuit detects igbt device failures that exhibit gate shorts or other weak drive causes. Two temperature sensor pins, TS1 and TS2, allow Isolated monitoring of system temperatures at the IGBTs. The secondary undervoltage lockout (UVLO) is set to V (typical) with common igbt threshold levels in mind. The adum4138 provides in field programming of temperature sensing diode gains and offsets by means of a serial peripheral interface (SPI) bus on the primary side of the device.

7 Values are stored on an EEPROM located on the secondary side of the device. In additional, programming is available for specific voltage offsets, temperature sensing reporting frequencies, and important delays. The adum4138 provides Isolated fault reporting for overcurrent events, remote temperature overheating events, UVLO, thermal shutdown (TSD), and desaturation detection. adum4138 preliminary technical data Rev. PrA | Page 2 of 23 TABLE OF CONTENTS Features .. 1 Applications .. 1 General Description.

8 1 Functional Block Diagram .. 3 Specifications .. 4 Electrical Characteristics .. 4 SPI Timing Specifications .. 7 Package Characteristics .. 7 Regulatory Information .. 8 Insulation and Safety-Related Specifications .. 8 DIN V VDE V 0884-10 (VDE V 0884-10) Insulation Characteristics .. 9 Recommended Operating Conditions .. 9 Absolute Maximum Ratings .. 10 ESD Caution .. 10 Pin Configuration and Function Descriptions .. 11 Applications Information .. 12 PCB Layout .. 12 Isolated flyback controller .

9 12 SPI and EEPROM 12 USER Register .. 13 CONFIG Register .. 13 Control Register .. 15 Propagation Delay-Related Parameters .. 15 Protection Features .. 16 Power 20 Insulation Lifetime .. 20 DC Correctness and Magnetic Field Immunity .. 21 Typical Application Circuit .. 22 Outline Dimensions .. 23 preliminary technical data adum4138 Rev. PrA | Page 3 of 23 FUNCTIONAL BLOCK DIAGRAM adum4138 DECODEDECODEDECODEFLYBACKCONTROLLERLOGIC VDD2OC_DETDRIVEMILLER_THRESHFAULTVDD2V2 LEVOC_DETFAULTDRIVELOW_T_OPLOW_T_OPVMILL ERMILLER_THRESHVOC = 2V t = tdOCVOC_OFFVOT t = tdOTOT_ERROREEPROMSAWTOOTHIT1T2 VLOW_TEMPHYSTERESISLOW_T_OPVDD1 VDD29V t = tdDstDESAT_ERRORIDESATENCODEENCODEENCODE ENCODEENCODEUVLO1 FLYBACKCONTROLLERLOGICVDD2_REFFAIL LATCH= tALMUVLO2 TSDDESAT_ERROROC_ERROROT_ERRORVL_ERRORSP IINTERNALLDOREGULATORVDD1 GAIN1VT_OFFSET1

10 GAIN2VT_OFFSET2VT_OFFSET1 GAIN1VT_OFFSET2 GAIN2 TEMP_OUT_PWMTEMP_OUT_PWMVUVLO2 HYSTERESISDECODEDECODEVVLVL_ERRORUVLO1 VUVLO1 HYSTERESISVDD1 UVLO1 SCALINGBLOCKV5 INFIPGV5V5 t = tVDD1 HYSTERESISTSDINTERNALTEMPERATURESENSORIN TERNALLDOREGULATOR5 VVDD2 SWVI_SENSEII_SENSEISENSEGND1 VDD1V5_1VI+FAULTTEMP_OUTPGOODMOSIMISOCSS CLKGND1 GND2 DESATVOUT_ONVOUT_OFFV5_2 VOFF_SOFTGATE_SENSEMILLER_OUTOC1OC2TS1TS 2 GND2 FAULTDRIVEFAULTUVLO2 FAULTDRIVE16036-001 DRIVEFAULTOC_DETOC_ERRORDRIVEDVL14111012 13 Figure 1. adum4138 preliminary technical data Rev.