The UC3843 is a high-performance current-mode PWM controller IC designed for off-line and DC-to-DC converter applications. It provides fast overcurrent protection and precise duty cycle control, making it ideal for switch-mode power supplies (SMPS), isolated flyback, and forward converters. Its internal oscillator, error amplifier, and reference voltage regulator simplify the overall design process for power conversion circuits.

Packaged in an easy-to-use DIP-8 form factor, the UC3843 is widely used in industrial, automotive, and consumer electronic systems.

Features of UC3843 PWM Controller IC:

1. Fixed-frequency current-mode PWM control
2. Low startup and operating current for high efficiency
3. Fast overcurrent response with cycle-by-cycle current limiting
4. High output drive capability (up to 1A)
5. Trimmed oscillator for precise frequency control
6. Undervoltage lockout with hysteresis
7. DIP-8 through-hole package for easy prototyping
8. Ideal for SMPS, flyback, and forward converter designs

Specifications of UC3843 IC:

• Model: UC3843
• Function: Current Mode PWM Controller
• Supply Voltage Range: 8.5V to 30V
• Oscillator Frequency: Up to 500 kHz
• Output Current: 1A
• Startup Current: <1mA
• Operating Current: ~17mA (typical)
• Package: DIP-8 – Through-Hole
• Operating Temperature: -40°C to +85°C
  

Package Includes:

1 × UC3843 Current Mode PWM Controller IC – DIP-8 Package