Overview

Features and Benefits

  • 6 A (typical) peak drive output capability
  • Internal turn off NFET, on resistance: <1 Ω
  • Internal turn on PFET, on resistance: <1.2 Ω
  • 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: 95 ns typical
    • Falling: 100 ns typical
  • Minimum pulse width: 74 ns
  • Operating junction temperature range: −40°C to +150°C
  • VDD1 and VDD2 UVLO
  • Minimum external tracking (creepage): 8.3 mm (pending)
  • 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 VPEAK (reinforced/basic)
  • Qualified for automotive applications

Product Details

The ADuM4138 is a single-channel gate driver optimized for driving insulated gate bipolar transistors (IGBTs). Analog Devices, Inc., iCoupler® technology provides isolation between the input signal and the output gate drive.

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 the dedicated outputs.

The ADuM4138 includes an isolated flyback controller, allowing simple secondary voltage generation.

Overcurrent detection is integrated in 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 function in case of faults.

The ADuM4138 provides a Miller clamp control signal for a metal-oxide semiconductor field effect transistor (MOSFET) to provide 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 the internal threshold within the time allowed after turn on (12.8 µs typical). The low voltage detection circuit detects IGBT device failures that exhibit gate shorts or other causes of weak drive.

Two temperature sensor pins, TS1 and TS2, allow isolated monitoring of system temperatures at the IGBTs. The secondary undervoltage lockout (UVLO) is set to 11.2 V (typical) in accordance with common IGBT threshold levels.

A serial peripheral interface (SPI) bus on the primary side of the device provides in field programming of temperature sensing diode gains and offsets to the ADuM4138. Values are stored on an electrically erasable programmable read-only memory (EEPROM) located on the secondary side of the device. In addition, programming is available for specific VDD2 voltages, temperature sensing reporting frequencies, and overcurrent blanking times.

The ADuM4138 provides isolated fault reporting for overcurrent events, remote temperature overheating events, UVLO, thermal shutdown (TSD), and desaturation detection.

Applications

  • MOSFET and IGBT gate drivers
  • Photovoltaic (PV) inverters
  • Motor drives
  • Power supplies

Product Lifecycle icon-recommended Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

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ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

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ADuM4138 Discussions

RE: (ADuM4138)What did you change?
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.