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TPS2393PW Datasheet(PDF) 15 Page - Texas Instruments |
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TPS2393PW Datasheet(HTML) 15 Page - Texas Instruments |
15 / 34 page TPS2392 TPS2393 SLUS536C − AUGUST 2002 − REVISED AUGUST 2004 www.ti.com 15 DETAILED DESCRIPTION + + H=CLOSED + L=CLOSED SQ Q R + + + LCA + H=CLOSED + SQ Q R 12 13 1.35V 5V FLT EN_A VLIM 4 9 10 6 8 1.4V 5 14 1 3 2 7 100 mV VLIM EN_A 11 IRAMP RAMP GENERATOR FAULT TIMER OVERLOAD OVERCURRENT DRAINSNS FLTTIME ISENS GATE INSA UVLO OVLO EN −VIN INSB S R FT ON EN OC OL RTN + OLC FLT UDG−02116 PG FAULT 10 µA 10 µA 10 µA 10 µA 10 µA 10 µA Figure 24. Block Diagram of PW Package Under normal load and input supply conditions, this controlled current charges the module’s input bulk capacitance up to the input dc voltage level. At this point, the load demand drops off, and the voltage at ISENS decreases. The LCA now drives the GATE output to its supply rail. The 14-V typical output level ensures sufficient overdrive to fully enhance the external FET, while not exceeding the typical 20-V VGS rating of common N-channel power MOSFETs. |
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