Vishay Intertechnology, Inc. introduces three high-speed, half-bridge MOSFET driver ICs that provide flexible gate drive levels to optimize efficiency, reduce component count and minimize expense in high-frequency, high-current DC/DC synchronous rectifier buck power supplies. The MOSFET drivers operate with external N-channel MOSFETs. They are designed to provide gate drive voltages of 8 or 12 V, operate at switching frequencies up to 1 MHz and function in 5 to 48 V 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 80 mA, 8 V regulator and to the low-side driver by the supply voltage. In the SiP41110, the regulator supplies both high-side and low-side voltages. In this way, designers can choose the gate drive voltage most suitable for achieving an optimal trade-off between MOSFET conduction and switching loss for the chosen operating frequency. The SiP41108 provides several 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.