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LT3477 Datasheet(PDF) 13 Page - Linear Technology

Part # LT3477
Description  3A, DC/DC Converter with Dual Rail-to-Rail Current Sense
PDF  20 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT3477 Datasheet(HTML) 13 Page - Linear Technology

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LT3477
13
3477fc
APPLICATIONS INFORMATION
Figure 8a. 32V to 6 White LEDs: Buck Mode With PWM Dimming
Figure 8b. PWM Dimming Waveforms
2ms/DIV
ILED
500mA/DIV
IL
500mA/DIV
PWM
5V/DIV
3477 F08b
PVIN = 32V
6 LEDs
300mA
PWM FREQUENCY = 100Hz
BUCK MODE
ISN1
ISP1
VIN
IADJ2
IADJ1
FBN
ISP2
FBP
VREF
C3
3.3μF
C1
2.2μF
VIN
3.3V
C1: NIPPON NTS40X5R1H225M
C2: TAIYO YUDEN GMK316BJ105ML
C3: TAIYO YUDEN LMK316BJ335KL
L1: TOKO D53LC (PN# A915AY-100M)
D1: ZETEX ZLLS400
D2: DIODES INC 1N4148
NMOS1, NM0S2: ZETEX 2N7002
PMOS: SILICONIX Si2303BDS
LED1 TO LED6: LUMILEDS LXHL-BW02
CC
0.1μF
CSS
33nF
300mA
PMOS
3477 F08a
6.81k
NMOS1
NMOS2
100k
0
5V
100Hz
PWM
280k
10k
SW
D2
SS
GND
LT3477
ISN2
RT
SHDN
VC
RSENSE
0.33Ω
PVIN
32V
L1
10μH
LED1
LED6
C2
1μF
D1
1k
1k
•
•
•
PWM



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