UC1844A-SP - Texas Instruments

UC1844A-SP current-mode PWM controller

The UC184xA-SP family of control ICs is a pin-for-pin compatible improved version of the UC184x family. Providing the necessary characteristics to control current-mode switched-mode power supplies, this device has improved features. Start-up current is specified to be less than 0.5 mA and oscillator discharge is trimmed to 8.3 mA. During UVLO, the output sta.

Features

•1 QML Class V (QMLV) Qualified, SMD 5962-86704
• Rad-Tolerant: 30-krad(Si) TID (1) (2)
• Optimized for Offline and DC-to-DC Converters
• Low Start-Up Current (< 0.5 mA)
• Trimmed Oscillator Discharge Current
• Automatic Feed Forward Compensation
• Pulse-by-Pulse Current Limiting
• Enhanced Load Response Characteristics
• Undervoltage Lockout (UVLO) With Hysteresis
• Double-Pulse Suppression
• High-Current Totem-Pole Output
• Internally-Trimmed Bandgap Reference
• 500-kHz Operation
• Low RO Error Amplifier 2 Applications
• DC-DC Converters
• Supports Various Topologies:
  – Flyback, Forward, Bu.