FP6321 データシートの表示（PDF） - Unspecified

部品番号

コンポーネント説明

メーカー

FP6321

Synchronous Buck PWM DC-DC Controller

Unspecified 

fitipower integrated technology lnc.

Application Information (Continued)

FP6321

Calculation Formula

VOUT=VFB x ((R3/R2) + 1)

[ ] L ≥ VIN(min) - VDS(SAT) - VOUT × TON(max)

ΔIL

I = I - I RIPPPLE LOAD(max) LOAD(min)

COUT

ESR = [ VRIPPLE ]

ΔI L

VDC -Rating ≥1.5 × VOUT

CIN

IIN(rms) = IOUT × D(1 D)

VDC-rating ≥1.5 × VIN(max)

Calculation Step-down (buck) regulator

TON /(TON +TOFF )

D

VOUT/VIN

ΔIL

2 x 10% x IO

IIN(rms)

IOUT × D (1 D )

Board Layout

Figure 18. Top Layer

Figure 19. Bottom Layer

Figure 20. Inner Layer 2

FP6321-1.3 -FEB-2010

Figure 21. Inner layer 3

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