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UC2847DW 数据表(PDF) 1 Page - Texas Instruments |
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UC2847DW 数据表(HTML) 1 Page - Texas Instruments |
1 / 24 page VREF RT CT +E/A -E/A COMP SH-DN GND VIN VC AOUT C/S+ BOUT C/S- CS/SS UCX846 VIN 100µF 2 9 8 5 6 7 16 12 1 3 14 4 11 13 15 .1µ F .005µF .5k 3.2k 3.2k 68k .0015 3.6k 1k 1.5k VREF 2N4150 180Ÿ 2W .05µF 68Ÿ .05µF 68Ÿ 1k 1k 2N4150 .5Q 1N4245 1N4245 1N4245 UES1402 UES1402 200µH 300µF VO Product Folder Sample & Buy Technical Documents Tools & Software Support & Community UC1846, UC1847, UC2846 UC2847, UC3846, UC3847 SLUS352C – JANUARY 1997 – REVISED DECEMBER 2015 UCx846/7 Current Mode PWM Controller 1 Features 3 Description The UC1846/7 family of control devices provides all 1 • Automatic Feedforward Compensation of the necessary features to implement fixed- • Programmable Pulse-by-Pulse Current Limiting frequency, current-mode control schemes while • Automatic Symmetry Correction in Push-Pull maintaining a minimum external parts count. The Configuration superior performance of this technique can be measured in improved line regulation, enhanced load • Enhanced Load Response Characteristics response characteristics, and a simpler, easier-to- • Parallel Operation Capability for Modular Power design control loop. Topological advantages include Systems inherent pulse-by-pulse current limiting capability, • Differential Current Sense Amplifier with Wide automatic symmetry correction for push-pull Common Mode Range converters, and the ability to parallel power modules while maintaining equal current sharing. • Double-Pulse Suppression Protection circuitry includes built-in undervoltage • 500-mA (Peak) Totem-pole Outputs lockout and programmable current limit, in addition to • ±1% Band Gap Reference soft-start capability. A shutdown function is also • Undervoltage Lockout available, which can initiate either a complete • Soft-Start Capability shutdown with automatic restart or latch the supply off. • Shutdown Terminal • 500-kHz Operation Other features include fully-latched operation, double- pulse suppression, deadline adjust capability, and a ±1% trimmed band gap reference. 2 Applications The UC1846 features low outputs in the OFF state, • Telecommunication Power Converters while the UCx847 features high outputs in the OFF • Industrial Power Converters state. Device Information(1) PART NUMBER PACKAGE BODY SIZE (NOM) LCCC (20) 8.89 mm × 8.89 mm UC1846 CDIP (16) 6.92 mm × 19.56 mm PLCC (20) 8.96 mm × 8.96 mm UC2846, UC3846 SOIC (16) 7.5 mm × 10.3 mm PDIP (16) 6.35 mm × 19.3 mm SOIC (16) 7.5 mm × 10.3 mm UC2847, UC3847 PDIP (16) 6.35 mm × 19.3 mm (1) For all available packages, see the orderable addendum at the end of the datasheet. Block Diagram 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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类似说明 - UC2847DW |
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