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UC1846-SP Datasheet(PDF) 1 Page - Texas Instruments |
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UC1846-SP Datasheet(HTML) 1 Page - Texas Instruments |
1 / 29 page Product Folder Sample & Buy Technical Documents Tools & Software Support & Community 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. UC1846-SP SLUS871D – JANUARY 2009 – REVISED DECEMBER 2016 UC1846-SP Class-V, Radiation Hardened PWM Controller 1 1 Features 1 • QML-V Qualified, SMD 5962-86806 • 5962P8680603VxA: – 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 • Automatic Feed-Forward Compensation • Programmable Pulse-by-Pulse Current Limiting • Automatic Symmetry Correction in Push-Pull Configuration • Enhanced Load Response Characteristics • Parallel-Operation Capability for Modular Power Systems • Differential Current-Sense Amplifier With Wide Common-Mode Range • Double-Pulse Suppression • 500-mA (Peak) Totem-Pole Outputs • ±1% Bandgap Reference • Undervoltage Lockout (UVLO) • Soft-Start Capability • Shutdown Terminal • 500-kHz Operation 2 Applications • DC-DC Converters • Satellite Buses and Payloads • Space Launch Vehicles • Undersea Cabling • Available in Military Temperature Range (–55°C to 125°C) • Supports Various Topologies: – Flyback, Forward, Buck, Boost – Push-Pull, Half-Bridge, Full Bridge With External Interface Circuit 3 Description The UC1846-SP control devices provide all of the necessary features to implement fixed frequency, current mode control schemes while maintaining a minimum external parts count. The superior performance of this technique can be measured in improved line regulation, enhanced load response characteristics, and a simpler, easier-to-design control loop. Topological advantages include inherent pulse-by-pulse current limiting capability, automatic symmetry correction for push-pull converters, and the ability to parallel power modules while maintaining equal current sharing. Protection circuitry includes built-in UVLO and programmable current limit in addition to soft-start capability. A shutdown function is also available which can initiate either a complete shutdown with automatic restart or latch the supply off. Other features include fully latched operation, double- pulse suppression, deadline adjust capability, a ±1% trimmed bandgap reference, and low outputs in the OFF state. Device Information(1) PART NUMBER PACKAGE BODY SIZE (NOM) UC1846-SP CDIP (16) 6.92 mm × 19.56 mm CFP (16) 6.73 mm × 10.30 mm LCCC (20) 8.89 mm × 8.89 mm KGD(2) N/A UC1846-SP RHA CDIP (16) 6.92 mm × 19.56 mm CFP (16) 6.73 mm × 10.30 mm (1) For all available packages, see the orderable addendum at the end of the data sheet. (2) KGD = known good die Block Diagram |
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