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UC3843B SMD IC High-Performance Current Mode PWM Controller

$38.00 $30.40

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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

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Parameter Value
Supply Voltage (Vcc) 7.6V to 30V
Operating Frequency 250 kHz (typical)
Output Current 1 A peak
UVLO Threshold 8.4V On, 7.6V Off
Operating Temperature Range -40C to +85C