MC34067-D| Datasheet

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MC34067, MC33067 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 and latch, 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.
Features

http://onsemi.com MARKING DIAGRAMS

16 16 1 PDIP-16 P SUFFIX CASE 648 1 MC3x067P AWLYYWWG

Zero Voltage Switch Resonant Mode Operation Variable Frequency Oscillator with a Control Range
Exceeding 1000:1 Precision One-Shot Timer for Controlled Off-T ime 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*
VCC 15 VCC UVLO / Enable Variable Frequency Oscillator 5.0 V Reference Vref UVLO 14 One-Shot 2.5 V Clamp Steering Flip-Flop 5 Vref

16 16 1 SOIC-16W DW SUFFIX CASE 751G x A WL YY WW G MC3x067DW AWLYYWWG

Enable / 9 UVLO Adjust 1 OSC Charge 2 OSC RC Oscillator 3 Control Current One-Shot 16

= 3 or 4 = Assembly Location = Wafer Lot = Year = Work Week = Pb-Free Package

PIN CONNECTIONS
Output A

OSC Charge 1 OSC RC 2

16 One-Shot RC 15 VCC 14 Drive Output A 13 Power GND 12 Drive Output B 11 CSoft- Start 10 Fault Input Enable/UVLO 9 Adjust (Top View)

12 Output B 13 Pwr GND

Error Amp 6 Output Noninverting 8 Input Inverting Input 7 Soft-Start 11

OSC Control Current 3 GND 4 Vref 5 Error Amp Out 6

Error Amp

Soft-Start

Fault Detector/ Latch

10 Fault Input

Inverting Input 7 Noninverting Input 8

Ground

Figure 1. Simplified Block Diagram
*For additional information on our Pb-Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D.
Semiconductor Components Industries, LLC, 2007

ORDERING INFORMATION
See detailed ordering and shipping information in the package dimensions section on page 2 of this data sheet.

May, 2007 - Rev. 12

Publication Order Number: MC34067/D