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UC3845AD8TR +BOM

PWM Controller with Current-Mode Operation for Switching Control

UC3845AD8TR General Description

Featuring integrated error amplification, a precise 5V reference voltage, and a totem pole output stage, the UC3845AD8TR offers exceptional voltage regulation and output drive capabilities. The adjustable soft-start function adds a layer of protection by limiting inrush current during power-on sequences. Furthermore, built-in safeguards such as overcurrent protection, overvoltage protection, and thermal shutdown enhance system reliability and safety

Key Features

  • Optimized for Off-Line and DC-DC Converters
  • Low Start-Up Current (< 0.5 mA)
  • Trimmed Oscillator Discharge Current
  • Automatic Feedforward Compensation
  • Pulse-by-Pulse Current Limiting
  • Enhanced Load Response Characteristics
  • Undervoltage Lockout With Hysteresis
  • Double Pulse Suppression
  • High-Current Totem Pole Output
  • Internally-Trimmed Bandgap Reference
  • Up to 500-kHz Operation
  • Create a Custom Design Using the UCx84xA With the WEBENCH Power Designer

Specifications

Topology Boost, Buck, Buck boost, Flyback, Forward Control mode Peak current mode
Duty cycle (max) (%) 50 Switching frequency (max) (kHz) 500
Features Adjustable switching frequency, Current limiting, Dead time control, Error amplifier, Multi-topology UVLO thresholds on/off (V) 8.4/7.6
Operating temperature range (°C) 0 to 70 Rating Catalog
Gate drive (typ) (A) 1 Vin (max) (V) 28

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