UC3843B SMD IC High-Performance Current Mode PWM Controller

The UC3843B is a high-performance fixed frequency current-mode PWM controller ideal for off-line and DC-to-DC converter applications. It offers enhanced speed and stability, enabling efficient power management in various switching power supply designs. Its SMD form factor makes it well-suited for compact, high-density circuits.

Features

• Fixed 250 kHz oscillator frequency for high-speed switching
• Low start-up and operating current for energy efficiency
• High output current capability (1 A peak)
• Undervoltage lockout with hysteresis
• Trimmed oscillator for precise duty cycle control
• Low total harmonic distortion and fast response

Applications

• AC-DC power supplies
• DC-DC converters
• Battery-powered devices
• LED drivers
• Consumer electronics power modules

Specification