ISO5500 - 4.243 kVrms 2.5 A Isolated IGBT Gate Driver

The ISO5500 is an isolated gate driver for IGBTs and MOSFETs with power ratings of up to I_C = 150 A and V_CE = 600 V. Input TTL logic and output power stage are separated by a capacitive, silicon dioxide (SiO₂), isolation barrier. When used in conjunction with isolated power supplies, the device blocks high voltage, isolates ground, and prevents noise currents from entering the local ground and interfering with or damaging sensitive circuitry.

The device provides over-current protection (DESAT) to an IGBT or MOSFET while an Undervoltage Lockout circuit (UVLO) monitors the output power supply to ensure sufficient gate drive voltage. If the output supply drops below 12 V, the UVLO turns the power transistor off by driving the gate drive output to a logic low state.

For a DESAT fault, the ISO5500 initiates a soft shutdown procedure that slowly reduces the IGBT/MOSFET current to zero while preventing large di/dt induced voltage spikes. A fault signal is then transmitted across the isolation barrier, actively driving the open-drain FAULT output low and disabling the device inputs. The inputs are blocked as long as the FAULT-pin is low. FAULT remains low until the inputs are configured for an output low state, followed by a logic low input on the RESET pin.

The ISO5500 is available in a 16-pin SOIC package and is specified for operating temperatures from –40°C to 125°C.

• 2.5-A Maximum Peak Output Current
• Drives IGBTs up to I_C = 150 A, V_CE = 600 V
• Capacitive Isolated Fault Feedback
• CMOS/TTL Compatible Inputs
• 300-ns Maximum Propagation Delay
• Soft IGBT Turnoff
• Integrated Fail-Safe IGBT Protection
  • High V_CE (DESAT) Detection
  • Undervoltage Lockout (UVLO) Protection
    With Hysteresis
• User Configurable Functions
  • Inverting, Noninverting Inputs
  • Auto-Reset
  • Auto-Shutdown
• Wide V_CC1 Range: 3 V to 5.5 V
• Wide V_CC2 Range: 15 V to 30 V
• Operating Temperature: –40°C to 125°C
• Wide-Body SO-16 Package
• ±50-kV/µs Transient Immunity Typical
• Safety and Regulatory Approvals:
  • VDE 6000 V_PK Basic Isolation per DIN V VDE
    V 0884-10 (VDE V 0884-10) and DIN EN
    61010-1
  • 4243 V_RMS Isolation for One Minute per UL
    1577
  • CSA Component Acceptance Notice #5A, IEC
    61010-1, and IEC 60950-1 End Equipment
    Standards