MC34067DWG Datasheet PDF - ON Semiconductor

●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 and latch, programmable soft-start circuitry, inputundervoltage lockout with selectable thresholds, and reference undervoltage lockout.These devices are available in dual-in-line and surface mount packages.

●Features

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● Zero Voltage Switch Resonant Mode Operation

● 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

● Pb-Free Packages are Available