ONSEMI UC3845BDG Datasheet & Stock

The UC3845BDG is a high-performance fixed frequency current-mode Pulse Width Modulation (PWM) Controller specifically designed for off-line and DC to DC converter applications offering the designer a cost-effective solution with minimal external components. It features an oscillator, a temperature compensated reference, high gain error amplifier, current sensing comparator and a high current totem pole output ideally suited for driving a power MOSFET. Also included are protective features consisting of input and reference undervoltage lockouts each with hysteresis, cycle-by-cycle current limiting, a latch for single pulse metering and a flip-flop which blanks the output off every other oscillator cycle, allowing output deadtimes to be programmed from 50 to 70%.




Trimmed oscillator for precise frequency control

Automatic feed forward compensation

Internally trimmed reference with undervoltage lockout

High current totem pole output

Undervoltage lockout with hysteresis

Low startup and operating current





Applications


Power Management,

Industrial