Gate Driver Optocoupler Power & Peak Current Calculator

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DEW Electronics Tools

Gate Driver Power & Peak Current

Example datasheet values

Supply and power device

VCC2 to VE (positive) (V)

VEE2 to VE (negative) (V)

Total gate charge Qg (nC)

Switching frequency (kHz)

Gate resistor, turn-on (Ω)

Gate resistor, turn-off (Ω)

Device internal gate resistance (Ω)

Driver

Output resistance, source (Ω)

Output resistance, sink (Ω)

Output supply current ICC2 max (mA)

Peak output current limit (A)

Ambient temperature (°C)

Board

Power limit at this ambient, custom parts only (mW)

LED input

LED drive voltage (V)

Recommended IF range low (mA)

Recommended IF range high (mA)

LED VF min (V)

LED VF max (V)

Readout

DRIVER OUTPUT IC DISSIPATION

—mW

PEAK GATE CURRENT, SOURCE / SINK

—A

LED RESISTOR

—

CHECKS

—

Dissipation follows the method in the ACFJ-3439T datasheet application section: bias power plus the share of gate-charge power dropped in the driver's own output resistance. The small Miller-clamp term is left out.