LT3477EUF#TRPBF Linear Technology, LT3477EUF#TRPBF Datasheet - Page 15

• 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
3V TO
16V
V
IN
V
800mA, 5V to 12V Boost Converter With Accurate Input Current Limit
5V
IN
R
1k
C1
3.3μF
SHDN
C
C
4.7nF
5.5V SEPIC Converter With Short-Circuit Protection
C
C1: TAIYO YUDEN LMK316BJ335ML
C2: TAIYO YUDEN LMK325BJ106MN
C3: TAIYO YUDEN LMK316BJ106ZL
D1: DIODES INC. DFLS130L
L1, L2: TOKO FDV0630-4R7M
R
1k
C1
2.2μF
SHDN
C
C
4.7nF
C
C1: TAIYO YUDEN LMK316BJ225MD
C2: AVX 1206YD106MAT
D1: DIODES INC. B320A
L1: TOKO FDV0630-4R7M
0.04Ω
R1
V
I
I
SHDN
V
V
ADJ1
ADJ2
IN
C
REF
I
SP1
FBP
V
I
I
I
SHDN
V
V
SP1
ADJ1
ADJ2
IN
C
REF
0.033Ω
FBP
R1
I
LT3477
SN1
GND
I
SN1
4.7μH
LT3477
GND
L1
SS
SW
4.7μH
I
I
L1
FBN
SP2
SN2
C4
33nF
SS
R
T
10μF
I
I
FBN
C2
SW
SP2
SN2
C3
10nF
R
T
R2
18.2k
D1
R2
17.8k
L2
4.7μH
D1
R3
200k
R4
23.2k
0.15Ω
C3
10μF
R3
3477 TA04a
3477 TA02a
C2
10μF
12V
0.8A
R5
10k
R4
34.8k
5.5V
670mA
90
85
80
75
70
65
60
55
50
90
85
80
75
70
65
60
55
50
0
0
V
IN
0.1
0.1
= 3V
0.2
0.2
0.3
Effi ciency
Effi ciency
0.3
I
I
OUT
OUT
0.4
(A)
(A)
0.4
0.5
0.5
0.6
LT3477
0.6
0.7
3477 TA02b
3477 TA04b
0.7
15
0.8
3477fc