MC34067P

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

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 . These controllers are designed for off-line and dc-to-dc converter applications that utilize frequency modulated constant off-time or constant deadtime control, featuring a variety of protective features and are available in dual-in-line and surface mount packages . Additionally, the MC34067 is specifically optimized for zero voltage switching (ZVS) quasi-resonant converter (QRC) applications, particularly for double-ended push-pull or bridge type converters operating in continuous conduction mode .