MC34067

Order this document by MC34067/D High Performance Resonant Mode Controllers The MC34067/MC33067 are high performance zero voltage switch resonant mode controllers designed for off–line and dc–to–dc converter applications that utilize frequency modulated constant off–time or constant deadtime control. These integrated circuits feature a variable frequency oscillator, a precise retriggerable one–shot timer, temperature compensated reference, high gain wide bandwidth error amplifier, steering flip–flop, and dual high current totem pole outputs ideally suited for driving power MOSFETs. Also included are protective features consisting of a high speed fault comparator, programmable soft–start circuitry, input undervoltage lockout with selectable thresholds, and reference undervoltage lockout. These devices are available in dual–in–line and surface mount packages. Zero Voltage Switch Resonant Mode Operation MC34067 MC33067 HIGH PERFORMANCE ZERO VOLTAGE SWITCH RESONANT MODE CONTROLLERS SEMICONDUCTOR TECHNICAL DATA Variable Frequency Oscillator with a Control Range Exceeding 1000:1 Precision One–Shot Timer for Controlled Off–Time Internally Trimmed Bandgap Reference 4.0 MHz Error Amplifier Dual High Current Totem Pole Outputs Selectable Undervoltage Lockout Thresholds with Hysteresis Enable Input Programmable Soft–Start Circuitry Low Startup Current for Off–Line Operation P SUFFIX PLASTIC PACKAGE CASE 648 16 1 DW SUFFIX PLASTIC PACKAGE CASE 751G (SO–16L) 1...