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XC9220A093MR Datasheet(PDF) 10 Page - Torex Semiconductor |
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XC9220A093MR Datasheet(HTML) 10 Page - Torex Semiconductor |
10 / 22 page 10/22 XC9220/XC9221 Series FOSC (kHz) L (μH) 300 22.0 500 10.0 1000 4.7 ■OPERATIONAL EXPLANATION (Continued) ● Setting of Coil Value Recommended inductance value of coil by oscillation frequency is shown in the chart below. However, the more current change in each pulse becomes larger, the more output ripple voltage becomes higher when dropout voltage is high. This may lead to instability. In this case, increasing the coil inductance value will make Ipk_AC small, and it makes output stable. Ipk_AC = (VIN – VOUT) x VOUT / (VIN x L x FOSC) L: Coil inductance value FOSC: Oscillation frequency Please do not exceed the coil rating. Coil peak current is determined by the following equation. Ipk = IOUT + Ipk_AC / 2 |
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