LT3477EUF#TRPBF Linear Technology, LT3477EUF#TRPBF Datasheet - Page 17

• Manufacturer Part Number: LT3477EUF#TRPBF
• Description: IC LED DRVR HP CONST CURR 20-QFN
• Manufacturer: Linear Technology
• Type: High Power, Constant Currentr

Specifications of LT3477EUF#TRPBF

• Constant Current: Yes
• Constant Voltage: Yes
• Topology: Flyback, PWM, SEPIC, Step-Down (Buck), Step-Up (Boost)
• Number Of Outputs: 1
• Internal Driver: Yes
• Type - Primary: General Purpose
• Type - Secondary: White LED
• Frequency: 200kHz ~ 3.5MHz
• Voltage - Supply: 2.5 V ~ 25 V
• Mounting Type: Surface Mount
• Package / Case: 20-QFN
• Operating Temperature: -40°C ~ 85°C
• Current - Output / Channel: 3A
• Internal Switch(s): Yes
• Efficiency: 93%
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -

TYPICAL APPLICATIONS
2.7V TO 10V
LED BRIGHTNESS
0mV TO 650mV
85
80
70
65
60
50
90
75
55
V
CONTROL
0
IN
SHDN
0.2
C1: TAIYO YUDEN LMK316BJ335ML
C2: MURATA GRM31CR71E475KA88L
D1: DIODES, INC. B320A
L1: TOKO FDV0630-4R7M
C1
3.3μF
C
10nF
C
0.4
I
OUT
Buck-Boost Mode LED Driver
V
IN
V
(A)
IN
V
I
I
SHDN
V
V
= 4.2V
ADJ1
ADJ2
0.6
IN
C
REF
I
= 8V
SP1
FBP
Effi ciency
0.8
I
LT3477
SN1
GND
3477 TA06b
4.7μH
L1
1.0
SS
SW1
LED2
I
I
FBN
SN2
C3
33nF
SP2
R
T
LED1
D1
R2
18k
V
R3
200k
R4
10k
IN
2.7
3.6
4.2
5
8
(V)
3477 TA06a
I
0.1Ω
OUT
C2
4.7μF
R1
0.57
0.74
0.83
0.93
1.0
(A)
LT3477
17
3477fc