LT3477EUF#TRPBF Linear Technology, LT3477EUF#TRPBF Datasheet - Page 4

• 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: -

LT3477
TYPICAL PERFORMANCE CHARACTERISTICS
4
1.0
1.6
1.4
1.2
20
15
10
5
0
–50
–50
SHDN Pin Turn-On Threshold
Soft-Start Pin Current
–25
–25
0
0
TEMPERATURE (°C)
TEMPERATURE (°C)
–10
50
40
20
10
30
25
0
–50
25
FBP Pin Bias Current
“+” INDICATES THE CURRENT
FLOWS OUT OF PIN
50
–25
50
75
75
0
100 125 150
TEMPERATURE (°C)
100
25
3477 G04
3477 G07
50
125
75
100
50
40
10
2.0
1.6
30
20
1.2
0.8
0.4
0
0
3477 G10
–50
0
SHDN Pin Current
Oscillator Frequency
125
–25
5
0
TEMPERATURE (°C)
R
R
R
T
T
T
25
10
V
= 10kΩ
= 15kΩ
= 20kΩ
SHDN
–50°C
125°C
25°C
50
(V)
15
75
–10
50
40
30
20
10
100 125
0
–50
20
FBN Pin Bias Current
“+” INDICATES THE CURRENT
FLOWS OUT OF PIN
3477 G05
3477 G08
–25
25
150
0
TEMPERATURE (°C)
25
–1
–2
–3
–4
3
6
5
4
2
4
3
2
1
0
–50
–50
Quiescent Current
50
Feedback Amplifi er Offset Voltage
V
C
–25
= 0.3V
–25
75
0
0
100
TEMPERATURE (°C)
TEMPERATURE (°C)
3477 G11
25
25
125
V C = 0.5V
50
50
V C = 1V
75
75
100 125 150
100
125
3477 G06
3477 G09
3477fc
150