UC3842 - Current Mode PWM Controller

The UC3842 IC is a current Mode PWM Controller, meaning it can be used to provide a constant current by varying the output voltage to the load. This IC features a trimmed oscillator for precise duty cycle control, a temperature compensated reference, a high gain error amplifier, a current sensing comparator, and a high current totem pole output for driving a Power MOSFET.

The UC3842 can be used to regulate or limit current in applications like SMPS, RPS, DC-DC Converters, Line voltage regulators, etc. So if you are looking for an IC to produce PWM signals for controlling a power switch based on the current flowing through the circuit, then this IC might be the right choice for you.

UC3842 IC Specifications

• Current-Mode PWM controller
• Operating Voltage: 12V to 28V
• Output pin current: 200 mA
• Switching Frequency: 500 kHz
• Duty Cycle - Max: 100 %
• Operating Supply Current:25 mA
• Optimized for Off-line and DC-to-DC Converters
• High-Current Totem-Pole Output