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Gate driver optocoupler provides lower power consumption, faster switching speeds

November 17, 2010 | Paul Buckley | 222901809
Gate driver optocoupler provides lower power consumption, faster switching speeds Fairchild Semiconductor has developed the FOD3184 , which is a 3 A output current, high speed MOSFET/IGBT gate driver optocoupler with a nearly 50% reduction in propagation delay times and 13% lower power consumption compared to the popular FOD3120 gate driver. The new device is ideal for high frequency driving of power MOSFETs and IGBTs at frequencies up to 250 kHz.

The FOD3184 consists of an aluminum gallium arsenide (AIGaAs) light emitting diode optically coupled to a CMOS detector with PMOS and NMOS output power transistors integrated into the circuit power stage. The PMOS pull-up transistor has low RDS(ON) for reduced internal power consumption and near rail-to-rail output voltage swing. The device also offers high noise immunity, characterized by a minimum 35 kV/µs common mode rejection (CMR) – ideal for noisy industrial applications.

The device also features a wide VCC operating range (15 V to 30 V), 3 A maximum peak output current and a guaranteed operating temperature range of -40 to +100 degrees C. The FOD3184 also features an under-voltage lockout protection (UVLO) with hysteresis, optimized for driving IGBTs.

The FOD3184 is packaged in an 8-pin dual in-line housing and offers >8.0 mm creepage and clearance distances – a critical end-application requirement for safety agencies. Additionally, the packaging is compatible with 260 degrees C reflow processes for lead-free solder compliance. The 1,414 V working voltage rating (VIORM) allows the device to drive 1,200 V loads with reliable long term insulation performance.

Availability and Pricing

Samples of the FOD3184 are available now and are priced at $1.51 each, 1k pieces

More information about the FOD3184 MOSFET/IGBT gate driver optocoupler at

Visit Fairchild Semiconductor at

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