UC1844A-SP

Product Folder Order Now Technical Documents Tools & Software Support & Community UC1842A-SP, UC1844A-SP SLUS872E – JANUARY 2009 – REVISED FEBRUARY 2019 UC184xA-SP QML class V, current-mode PWM controller 1 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, Buck, Boost – Push-Pull, Half-Bridge, Full-Bridge With External Interface Circuit Available in Military Temperature Range (–55°C to 125°C) 3 Description 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 stage can sink at least 10 mA at less than 1.2 V for VCC over 5 V. The Device Comparison Table shows the difference between members of this family. Reference the indivi...