Analog Devices Inc. ADUM4138 IGBT Gate Drivers
Analog Devices ADUM4138 IGBT Gate Drivers include an isolated flyback controller, allowing simple secondary voltage generation. The ADUM4138 integrates overcurrent detection protecting the IGBT in case of desaturation and/or overcurrent events. The overcurrent detection is coupled with a high-speed, two-level turn-off function as protection against faults. The device offers a low gate voltage detection circuit which triggers a fault if the gate voltage does not rise above the internal threshold within the time allowed after turning on (12.8μs typical). IGBT device failures that exhibit gate shorts or other causes of a weak drive are detected through the low-voltage detection circuit.
A serial peripheral interface (SPI) bus on the primary side of the ADUM4138 provides in-field programming of temperature sensing diode gains and offsets. The values are stored on an electrically erasable programmable read-only memory (EEPROM) located on the secondary side of the device. Additionally, programming is available for specific VDD2 voltages, temperature sensing reporting frequencies, and overcurrent blanking times. The ADUM4138 highlights isolated fault reporting for overcurrent events, remote temperature overheating events, UVLO, thermal
shutdown (TSD), and desaturation detection.
Features
- 6A (typical) peak drive output capability
- <1Ω Internal turn off NFET, on resistance
- <1.2Ω Internal turn on PFET, on resistance
- 2 overcurrent protection methods
- Desaturation detection
- Split emitter overcurrent detection
- Miller clamp output with gate sense input
- Isolated fault output
- Isolated temperature sensor readback
- Propagation delay
- Rising at 95ns typical
- Falling at 100ns typical
- 74ns Minimum pulse width
- -40°C to +150°C Operating junction temperature range
- VDD1 and VDD2 UVLO
- 8.3mm (pending) Minimum external tracking (creepage)
- Safety and regulatory approvals
- 5000Vrms 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 VPEAK (reinforced/basic)
- Qualified for automotive applications
Applications
- MOSFET and IGBT gate drivers
- Photovoltaic (PV) inverters
- Motor drives
- Power supplies
Evaluation Board
Analog Devices Inc. EVAL-ADUM4138EBZ Evaluation Board
Maintains flexibility in a testing environment while demonstrating the features of the ADUM4138.
Block Diagram
