Designers of industrial products such as solar inverters, uninterruptible power supplies (UPS), and motor drivers require higher-performance gate drive optocouplers that offer lower power consumption and faster switching speeds to meet global energy efficiency standards. To address this challenge, Fairchild has developed the FOD3184, a 3A output current, high-speed MOSFET/IGBT gate driver optocoupler that reduces propagation delay by approximately 50% and lowers power consumption by 13% compared to the popular FOD3120. This product is ideal for driving power MOSFETs and IGBTs at high frequencies up to 250 kHz.

The FOD3184 consists of an AIGaAs optical LED combined with a CMOS detector and integrated PMOS and NMOS output transistors in the circuit power stage. The PMOS pull-up transistor features a low RDS(ON) to reduce internal power consumption and achieve a close rail-to-rail output voltage swing. This component also provides high noise immunity, characterized by a common-mode rejection (CMR) of at least 3.5 kV/µs, making it ideal for noisy industrial applications.

This component also features a wide Vcc operating range (15V to 30V), a maximum peak output current of 3A, and guaranteed operation over a temperature range of -40ºC to +100ºC. The FOD3184 also features undervoltage protection (UVLO) with hysteresis and optimal characteristics for driving IGBTs. The FOD3184 comes in an 8-pin package.