Automotive R²Coupler™ Smart Gate Drive Optocoupler

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The Broadcom ACPL-344JT is an automotive grade 2.5A smart gate drive optocoupler device featuring fast propagation delay with excellent timing skew performance. The device features a full set of fail-safe IGBT diagnostics, protection and fault reporting. This full-featured and easy-to-implement IGBT gate drive optocoupler comes in a compact, surface-mountable SO-16 package. The ACPL-344JT is designed for use in traction power train inverter, power converter, battery charger, air conditioner and oil pump motor drive for electric vehicle (EV), hybrid electric vehicle (HEV) and plug-in hybrid electric vehicles (PHEV) applications. The device satisfies automotive AEC-Q100 semiconductor requirements.

Broadcom R²Coupler™ isolation products provide the reinforced insulation and reliability needed for critical automotive and high temperature industrial applications.


  • Qualified to AEC-Q100 Grade 1 Test Guidelines
  • Operating Temperature Range: -40°C to +125°C  
  • 2.5 A Maximum Peak Output Current
  • 1.9A Miller Clamp Sinking Current
  • Wide Operating VCC Range: 15 to 25 V
  • Propagation Delay: 250 ns (max.)
  • Integrated Fail-safe IGBT Protection
    – Desat Sensing, "Soft" IGBT Turn-off and Fault Feedback
    – Under Voltage Lock-Out (UVLO) with Feedback
  • Common Mode Rejection (CMR): >50 kV/μs at VCM = 1500 V
  • High Noise Immunity
    – Miller Current Clamping
    – Direct LED Input with Low Input Impedance and Low Noise Sensitivity
    – Negative Gate Bias
  • SO-16 Package with 8mm Creepage and Clearance
  • Regulatory Approvals:
    – UL1577, CSA
    – IEC/EN/DIN EN 60747-5-5
  • Available Options:
    • 500 = Tape and Reel Packaging Option
    • XXXE = Lead Free Option


  • Automotive Isolated IGBT/MOSFET Inverter Gate Drive
  • Automotive DC-DC Converter
  • AC and Brushless DC Motor Drives
  • Industrial Inverters for Power supplies and Motor Controls
  • Un-interruptible Power Supplies

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Substance Compliance

  • RoHS
    Pb & Pb-free options available
Specification Value
Lifecycle Active
Distrib. Inventory Yes
Product Type Automotive Optocoupler
CMR (min.) (V/µs) 50000.0
Vcm (V) 1500.0
IF Min. (mA) 10.0
RoHS6 Compliant Pb & Pb-free options available
Operating Temperature Range -40°C to +125°C
UL Insulation Rating Viso (VRMS) 5000.0
IEC Maximum Working Insulation Voltage Viorm (VPEAK) 1230.0
Prop Delay (tPHL) Max. (µs) 0.25 µs
Prop Delay (tPLH) Max. (µs) 0.25 µs
Data Sheet1 i
Options Data Sheet3 i
Reliability Data Sheet5 i
Photocard1 i


Automotive R²Coupler™ Smart Gate Drive Optocoupler


Automotive Gate Drive Optocoupler with R²Coupler™ Isolation