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Non-Overlapping Push-Pull Driver for High Speed Switching of Power Field-Effect Transistors

IP.com Disclosure Number: IPCOM000040110D
Original Publication Date: 1987-Sep-01
Included in the Prior Art Database: 2005-Feb-01

Publishing Venue

IBM

Related People

Authors:
Bustamante, CM Zalph, WN [+details]

Abstract

This article describes a high speed push-pull driver for power field- effect transistors (FETs). The disclosed circuit's function is converting high impedance (25 ohms) logic-level signals to higher voltage levels (12 volts), performing a phase splitting function followed by a high-to-low impedance (0.06 ohms) conversion to drive the push and pull stages which switch a large FET. Traditional drivers suffer from three problems as follows: High transient surge currents during switching of the push-pull devices which is power consumptive and creates radiated and conducted interference problems. Inability to fine tune the circuit to meet the applications requirements (switching speed, power consumption) without modifying the circuit topology.