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5962P8670411VPA Datasheet(PDF) 1 Page - Texas Instruments |
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5962P8670411VPA Datasheet(HTML) 1 Page - Texas Instruments |
1 / 28 page Total Ionizing Dose (TID), krad (Si) 0 5 10 15 20 25 30 35 40 45 4.94 4.95 4.96 4.97 4.98 4.99 5.00 5.01 5.02 5.03 5.04 D001 LDR UnBiased VIN = 32 V, ILOAD = 1 mA LDR UnBiased VIN = 15 V, ILOAD = 1 mA 7 5 4 2 1 3 8 7 6 5 V CC Gnd R T/CT V FB Comp C/S V REF 5.0 V 50 mA V C Output Pwr Ground PWM Latch 5-V REF S/R UVLO 34 V 2.5 V Osc Error Amplifier 2R R 1 V Current Sense Comparator Internal Bias V Good Logic REF S R Product Folder Sample & Buy Technical Documents Tools & Software Support & Community UC1845A-SP SLUSC14 – MAY 2015 UC1845A-SP QML Class V, Radiation Hardened Current-Mode PWM Controller 1 Features 2 Applications 1 • QML Class V (QMLV) Qualified, SMD 5962-86704 • Radiation-Hardened DC-DC Converters • 5962P8670411Vxx: (1) • Satellite Buses and Payloads • Space Launch Vehicles – Radiation Hardness Assurance (RHA) up to 30 kRAD (Si) Total Ionizing Dose (TID) • Undersea Cabling – Passes Functional and Specified Post- • Supports Various Topologies: Radiation Parametric Limits at 45 kRAD at – Flyback, Forward, Buck, Boost LDR (10 mRAD/s) per 1.5× over Test as – Push-Pull, Half-Bridge, Full Bridge With Defined in MIL-STD-883 Test Method 1019.9 External Interface Circuit Paragraph 3.13.3.b – Exhibits Low Dose Rate Sensitivity (2) But 3 Description Remains Within the Pre-Radiation Electrical The UC1845A-SP control IC is a radiation hardened Limits at 30 krad Total Dose Level, as Allowed pin-for pin compatible version of the UC184x family. It by MIL-STD-883, TM1019 is primarily suited for Satellites and other harsh • Optimized for DC-to-DC Converter Applications environment applications. Providing the necessary features to control current-mode switched-mode • Low Start-Up Current (<0.5 mA) power supplies, this device has the following • Trimmed Oscillator Discharge Current improved features. Start up current is specified to be • Automatic Feed Forward Compensation less than 0.5 mA. Oscillator discharge is trimmed to 8.3 mA. During UVLO, the output stage can sink at • Pulse-by-Pulse Current Limiting least 10 mA at less than 1.2 V for VCC over 5 V. • Enhanced Load Response Characteristics The Device Comparison Table shows the difference • Undervoltage Lockout (UVLO) With Hysteresis between members of this family. Reference the • Double-Pulse Suppression individual product data sheets for ordering the • High-Current Totem-Pole Output radiation-improved version if available. • Internally-Trimmed Bandgap Reference Device Information(1) • 500-kHz Operation PART NUMBER PACKAGE BODY SIZE (NOM) • Low RO Error Amplifier CDIP/JG (8) 6.67 mm × 9.60 mm • Qualified over the Military Temperature Range UC1845A-SP LCCC/FK (20) 8.89 mm × 8.89 mm (–55°C to 125°C) CFP/HKU (10) 6.48 mm × 7.02 mm (1) Improved TID radiation performance only applies to RHA device type 11. (1) For all available packages, see the orderable addendum at (2) The affected parameter Reference Output Voltage, VREF the end of the data sheet. Radiation Drift Curve (see VREF Radiation Drift Curve). VREF Radiation Drift Curve 4 Simplified Schematic 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. |
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