N-Channel MOSFET Drivers

( 1 Jul 2006 )

Vishay Intertechnology’s three high-speed, half-bridge MOSFET driver ICs provide flexible gate drive levels to optimize efficiency, reduce component count and minimize expense in highfrequency, high-current DC/DC synchronous rectifier buck power supplies. They operate with external N-channel MOSFETs and are designed to provide gate drive voltages of 8 or 12V, operate at switching frequencies up to 1MHz and function in 5 to 48V systems, including power converters and industrial and computing equipment. In the SiP41109, the gate drive voltage is supplied to the high-side driver by an integrated 80mA, 8V regulator and to the low-side driver by the supply voltage. In the SiP41110, the regulator supplies both high-side and low-side voltages. The SiP41108 hasseveral additional features, including an adjustable high-side propagation delay, a dedicated shutdown pin and a synchronous MOSFET disable function for improved efficiency under certain operating conditions. Vishay Intertechnology, Inc.