UC1825A-SP Datasheet | Texas Instruments

Features - 1 QML-V Qualified, SMD 5962-87681 - 5962P8768105Vxx: - 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 - patible With Voltage-Mode or Current-Mode Control Methods - Practical Operation at Switching Frequencies to 1 MHz - 50-ns Propagation Delay to Output - High-Current Dual Totem Pole Outputs (2-A Peak) - Trimmed Oscillator Discharge Current - Low 100-μA Start-Up Current - Pulse-by-Pulse Current Limiting parator - Latched Overcurrent parator With Full Cycle Restart - Qualified Over the Military Temperature Range (- 55°C to 125°C) 2 Applications - Radiation-Hardened DC-DC Converters - Satellite Buses and Payloads - Space Launch Vehicles - Undersea Cabling - Supports Various Topologies: - Flyback, Forward, Buck, Boost - Push-Pull, Half-Bridge, Full Bridge With External Interface Circuit 3 Description The UC1825A-SP PWM controller is a radiation hardened version of the standard UC1825 family. Performance enhancements have been made to several of the circuit blocks. Error amplifier gain bandwidth product is 12 MHz, while input offset voltage is 2 m V. Current limit threshold is assured to a tolerance of 5%. Oscillator discharge current is specified at 10 m A for accurate dead time control. Frequency accuracy is improved to 6%. Start-up supply current, typically 100 μA, is ideal for offline applications. The output drivers are redesigned to actively sink current during UVLO at no expense to the start-up current specification. In addition each output is capable of 2-A peak currents during transitions. Device Information(1) PART NUMBER PACKAGE BODY SIZE (NOM) CDIP (16) 19.56 mm ×...