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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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CS2 датащи(PDF) 26 Page - fujitsu semiconductor |
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CS2 датащи(HTML) 26 Page - fujitsu semiconductor |
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26 / 56 page  26 MB39A214A Limitation : development tool vendor use only FUJITSU SEMICONDUCTOR CONFIDENTIAL DS405-00007-1v0-E APPLICATION NOTE 1. Setting Operating Conditions Setting output voltages The output voltage can be set by adjusting the setting output voltage resistor ratio. Setting output voltage is calculated by the following formula. R1 + R2 2.8 10-7 ΔVOUTx VOUTx = R2 (0.6946 + 0.2667 ΔIL (1− tOFF ) RON_Sync) + 2 VIN − VOUT VOUT (VIN − VOUTx) ΔVOUTx = ESR ΔIL, ΔIL = L VIN fOSC , tOFF = VIN fOSC VOUTx : Output setting voltage [V] VIN : Power supply voltage [V] ΔVOUTX : Output ripple voltage value [V] tOFF : Off time [s] RON_Sync : ON resistance of low-side FET [Ω] ΔIL : Ripple current peak-to-peak value of inductor [A] ESR : Series resistance element of output capacitor [Ω] L : Inductor value [H] fOSC : Switching frequency [Hz] R1 VOUTx R2 VOUTX FBX The total resistor value (R1+R2) of the setting output resistor should be selected up to 100 kΩ. x: Each channel number |
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