UC3845 CURRENT MODE PWM CONTROLLER IC DIP-8

The UC3845 fixed frequency current mode controller is specifically designed for off−line and DC−to−DC converter applications offering the designer a cost-effective solution with minimal external components. These integrated circuits feature a trimmed oscillator for precise duty cycle control, a temperature compensated reference, a high gain error amplifier, a current sensing comparator, and a high current totem pole output ideally suited for driving a power MOSFET.

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

Electrical Characteristics:

• • Supply voltage (low impedance source): 30V
  • Output current, IOUT: ±1 A
  • The differential voltage between VC and VCC: -0.3V
  • Power dissipation at TA ≤ 25°C: 1W
  • Switching Frequency: 500 kHz

Mechanical Characteristics:

• • Case: PDIP-8
  • Mounting Style: Through Hole

Applications: 

• • Switch Mode Power Supplies (SMPS)
  • DC-DC Converters
  • Power Modules
  • Industrial PSU
  • Battery Operated PSU

Datasheet:

• • Datasheet: Download Datasheet

Package includes:

• • 1 x IC UC3845N UC3845AN UC3845 DIP8