SC4541 データシートの表示（PDF） - Semtech Corporation
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SC4541 Datasheet PDF : 19 Pages
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SC4541
Typical Characteristics (continued)
Start up By Vin Conditions: 5VIN, 20mA ,6 LEDs in series, CIN/COUT=1µF, L=10µH
Shut
Test condition: 5SVtina, rLtE-Dusp=6— S1Pb, Ry1V=1I0NΩ, SC4541(1120)
Test condition: 5VinS, LhEuDts=D6So1wP,nR1=10Ω, SC4541(1120)
VIN
VIN
(2.5V/div)
VIN
(2.5V/div)
VOUT
VOUT
(5V/div)
VIN
VOUT
VOUT
IL
(5V/div)
IL
(0.2A/div)
IL
IL
(0.2A/div)
VSW
(10V/div)
Time (2mS/div)
Test conditSiotna:r5tV-iun,pLE—Ds=b6yS1PPW, R1M=10Ω,
300SHCz 4P5W4M1(D1i1m2m0)i,nPg,W0.M1%DDimutmy Cinygcle300Hz, 0.1% duty.
VOUT
(5V/div)
IL
(0.3A/div)
VSW
(10V/div)
SW
VSW
(10V/div)
Start up By PWM
Time (5mS/div)
SW
Mail Pow
Test conditioMn: a5Vinin,PLoEDwse=6rSS1Pw, iRt1c=h10inΩg, SC4541(1120)
VOUT
IL
VIN
(1V/div)
VOUT
(50mV/div)
IL
(0.2A/div)
VIN
VOUT
IL
SW
PWM
VSW
(3V/div)
EN
(5V/div)
SW
Time (0.1S/div)
Time (0.5μS/div)
VIN Fluctuation - Rising
VIN Fluctuation — Rising
VIN Fluctuation — Falling
5VIN to 1TR2e1Vs=INt1c0oΩn,dSitCio4n5:451V(1in12t0o)12Vin, LEDs=6S1P,
12VIN toT5eVsINt condition: 5Vin to 12Vin, LEDs=6S1P,
R1=10Ω, SC4541(1120)
VIN Fluc
VIN
(5V/div)
VIN
VIN
(5V/div)
VIN
VOUT
(1V/div)
VOUT
VOUT
(1V/div)
VOUT
VSW
VSW
(10V/div)
SW
(10V/div)
SW
Time (2μS/div)
Time (20μS/div)
7
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