UC3843B Datasheet (PDF) Download
Unisonic Technologies
UC3843B

Description

The UTC UC3842B/3843B are specifically designed for off-line and dc-to-dc converter applications offering the designer a cost-effective solution with minimal external ponents.

Key Features

  • Trimmed oscillator for precise frequency control
  • Oscillator frequency guaranteed at 250kHz
  • Current mode operation to 500kHz
  • Automatic feed forward pensation
  • Latching PWM for cycle-by-cycle current limiting
  • Internally trimmed reference with undervoltage lockout
  • High current totem pole output
  • Undervoltage lockout with hysteresis
  • Low startup and operating current
UC3843B reference image

Representative UC3843B image (package may vary by manufacturer)