MC34065H,L

The MC34065H,L series are high performance, fixed frequency, dualcurrent mode controllers. They are specifically designed for offline anddctodc converter applications offering the designer a cost effectivesolution with minimal external components. These integrated circuits featurea unique oscillator for precise duty cycle limit and frequency control, atemperature compensated reference, two high gain error amplifiers, twocurrent sensing comparators, Drive Output 2 Enable pin, and two highcurrent totem pole outputs ideally suited for driving power MOSFETs.
Also included are protective features consisting of input and referenceundervoltage lockouts each with hysteresis, cyclebycycle current limiting,and a latch for single pulse metering of each output. These devices areavailable in dualinline and surface mount packages.
The MC34065H has UVLO thresholds of 14 V (on) and 10 V (off), ideallysuited for offline converters. TheMC34065L is tailored for lower voltageapplications having UVLO thresholds of 8.4 V (on) and 7.8 V (off).