The UC3842/UC3843/UC3844/UC3845 are fixed frequency current-mode PWM controller. They are specially designed for Off-Line and DC to DC converter applications with minimum external components. These integrated circuits featrue a trimmed oscillator for precise duty cycle control, a temperature compensated reference, high gain error amplifier, current sensing comparator and a high current totempole output for driving a Power MOSFET.
- Fixed Frequency Current-Mode PWM Controller
- Low Start Up Current
- Maximum Duty Clamp
- UVLO with Hysteresis
- Operating Frequency up to 500kHz