MC33067P

The protective features included in the MC34067/MC33067 controllers are a high-speed fault comparator, programmable soft-start circuitry, input undervoltage lockout with selectable thresholds, and reference undervoltage lockout.

The key features of the MC34067/MC33067 high performance zero voltage switch resonant mode controllers include: - 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 - Protective features such as high-speed fault comparator, programmable soft-start circuitry, input undervoltage lockout with selectable thresholds, and reference undervoltage lockout MC34067/MC33067 are designed for off-line and dc-to-dc converter applications that utilize frequency modulated constant off-time or constant deadtime control. They 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 .

The MC34067/MC33067 devices are available in dual-in-line and surface mount packages.