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UC1543 Scheda tecnica(PDF) 5 Page - Texas Instruments |
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UC1543 Scheda tecnica(HTML) 5 Page - Texas Instruments |
5 / 6 page UNITRODE CORPORATION 7 CONTINENTAL BLVD. • MERRIMACK, NH 03054 TEL. (603) 424-2410 • FAX 603-424-3460 UC1543 UC1544 UC2543 UC2544 UC3543 UC3544 Overcurrent Shutdown Input Line Monitor APPLICATIONS (Pin numbers given for UC1543 series devices) Typical Application Sensing Multiple Supply Voltages The values for the external components are determined as follows: Current limit input threshold, VTH = 1000 R1 C S is determined by the current loop dynamics Peak current to load, IP ≅ VTH RSC + VO RSC R 2 R2 + R 3 Short Circuit Current, ISC = VTH RSC Low output voltage limit, VO (Low) = 2.5 (R4 + R5 + R6) R5 + R6 High output voltage limit, VO (High) = 2.5 (R4 + R5 + R6) R6 Voltage sensing delay, tD = 10,000Cd SCR trigger power limiting resistor, RG > VIN − 5 0.2 5 |
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