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FSDH321 Datasheet(PDF) 6 Page - Fairchild Semiconductor |
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FSDH321 Datasheet(HTML) 6 Page - Fairchild Semiconductor |
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FSDH321, FSDL321 6 Comparison Between FSDM311 and FSDx321 Function FSDM311 FSDx321 FSDx321 Advantages Soft-Start 15ms 15ms (same for both devices) • Gradually increasing current limit during soft-start further reduces peak current and voltage stresses • Eliminates external components used for soft-start in most applications • Reduces or eliminates output overshoot External Current Limit not applicable Programmable of default current limit • Smaller transformer • Allows power limiting (constant over- load power) • Allows use of larger device for lower losses and higher efficiency. Frequency Modulation not applicable ±3.0KHz @100KHz ±1.5KHz @50KHz • Reduces conducted EMI Burst Mode Operation Built into controller Built into controller (same for both devices) • Improves light load efficiency • Reduces power consumption at no- load • Transformer audible noise reduction Drain Creepage at Package 7.62mm 7.62mm (same for both devices) • Greater immunity to arcing provoked by dust, debris and other contami- nants |
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