UC1843A-SP QML class V, radiation hardened current-mode PWM controller
1 Features
QML Class V (QMLV) Qualified, SMD 5962-86704
5962P8670409Vxx:
Radiation Hardness Assurance (RHA) up to
30-krad(Si) Total Ionizing Dose (TID)
Passes Functional and Specified Post-Radiation Parametric Limits at 45 krad at LDR (10 mrad(Si)/s) per 1.5× Over Test as Defined in MIL-STD-883 Test Method 1019.9 Paragraph 3.13.3.b
Exhibits Low-Dose Rate Sensitivity but Remains Within the Pre-Radiation Electrical Limits at 30-krad Total Dose Level, as Allowed by MIL-STD-883, TM1019
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)