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AMC3843B Datasheet(PDF) 7 Page - List of Unclassifed Manufacturers |
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AMC3843B Datasheet(HTML) 7 Page - List of Unclassifed Manufacturers |
7 / 10 page AMC DOC. #: AMC3842B_C (LF) AMC3842B/43B March 2004 CURRENT MODE PWM CONTROLLER Copyright © 2002, ADD Microtech Corp. 7 www.addmtek.com Application Information (continued) Fig. 5. Shutdown Techniques - there are two ways to shutdown the PWM controller: 1) raise the voltage at ISENSE above 1V or, 2) pull the COMP below a voltage two diodes above ground. Fig 6. Slop Compensation – To achieve duty cycles over 50% for some applications , the above slope compensation technique is suggested by resistively summing a fraction of the oscillator ramp with the current sense signal. 1K COMP VREF Shutdown 330 Ω ISENSE Shutdown 500 Ω To Current Sense Resistor VREF RT 0.1 µF RT/CT CT ISENSE R2 R1 ISENSE RSENSE C |
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