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UC1846J +BOM

PWM Current Mode Controller

UC1846J General Description

The built-in protection circuitry of the UC1846J includes undervoltage lockout, programmable current limit, and soft-start capability. Furthermore, a shutdown function is available that can either initiate a complete shutdown with automatic restart or latch the power supply off. With fully-latched operation, double-pulse suppression, and deadline adjust capability, this device offers comprehensive protection and control features

Key Features

  • Current-mode PWM controller
  • Designed for high-performance power supplies
  • Bidirectional synchronization capability
  • Internal soft-start
  • Programmable oscillator frequency
  • Precision reference trimmed for ±1% accuracy
  • Overcurrent sensing and protection
  • 50ns propagation delay for high-speed operation
  • Application

    • Revolutionary power supply technology at its best
    • UC1846J excels in all power management tasks
    • From PFC pre-regulators to lighting ballast control circuits

    Specifications

    Topology Boost, Flyback, Forward, Full bridge, Half bridge, Push pull Control mode Current
    Duty cycle (max) (%) 50 Switching frequency (max) (kHz) 500
    Features Error amplifier, Multi-topology, Soft start, Synchronization pin UVLO thresholds on/off (V) 7.7/6.95
    Operating temperature range (°C) -55 to 125 Rating Military
    Gate drive (typ) (A) 0.5 Vin (max) (V) 40

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