LT3476EUHF#PBF Linear Technology, LT3476EUHF#PBF Datasheet - Page 4

• Manufacturer Part Number: LT3476EUHF#PBF
• Description: IC LED DRVR HP CONST CURR 38-QFN
• Manufacturer: Linear Technology
• Type: High Power, Constant Currentr

Specifications of LT3476EUHF#PBF

• Constant Current: Yes
• Topology: PWM, Step-Down (Buck), Step-Up (Boost)
• Number Of Outputs: 4
• Internal Driver: Yes
• Type - Primary: Automotive, Backlight
• Type - Secondary: Color, RGB
• Frequency: 200kHz ~ 2MHz
• Voltage - Supply: 2.8 V ~ 16 V
• Voltage - Output: 2.2 V ~ 36 V
• Mounting Type: Surface Mount
• Package / Case: 38-QFN
• Operating Temperature: -40°C ~ 85°C
• Current - Output / Channel: 1.5A
• Internal Switch(s): Yes
• Efficiency: 96%
• Led Driver Application: Automotive, Avionic Lighting
• No. Of Outputs: 4
• Output Current: 1.5A
• Output Voltage: 36V
• Dimming Control Type: PWM
• Rohs Compliant: Yes
• Input Voltage: 2.8V To 16V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

LT3476
TYPICAL PERFOR A CE CHARACTERISTICS
4
1.055
1.040
1.065
1.060
1.050
1.045
150
120
108
107
105
104
103
102
106
90
60
30
0
–45
–45
0
V(CAP-LED) Threshold vs V
V(CAP-LED) Threshold
vs Temperature, V
Reference Voltage
T
A
= 25°C
–20
–20
0.3
TEMPERATURE (°C)
TEMPERATURE (°C)
5
5
0.6
V
ADJ
30
30
(V)
ADJ
0.9
= V
55
55
W
REF
1.2
ADJ
80
80
3476 G01
3476 G07
U
3476 G04
105
1.5
105
107
102
108
106
105
104
103
2.5
0.5
1.5
2.5
1.5
0.5
2
1
0
0
2
1
–45
0
Current Limit vs Duty Cycle
0
Switch Current Limit
vs Temperature
V(CAP-LED) Threshold vs V(CAP)
V
ADJ
–20
5
= 1.05V
20
MINIMUM
10
TEMPERATURE (°C)
DUTY CYCLE (%)
5
40
15
V
CAP
30
(V)
20
TYPICAL
60
55
25
80
80
30
T
3476 G02
3476 G05
3476 G08
A
= 25°C, unless otherwise noted.
100
105
35
10000
1150
1100
1050
1000
1000
950
850
900
100
25
20
15
10
5
0
–45
Oscillator Frequency vs R
Quiescent Current
0
Oscillator Frequency
vs Temperature
R
T
= 21k
1
–20
4
TEMPERATURE (°C)
10
5
V
T
A
C
R
= GND, NOT SWITCHING
= 25°C
V
T
IN
30
(kΩ)
8
(V)
PWM 1-4 = 3.6V
100
55
PWM 1-4 = 0V
12
T
80
3476 G06
3476 G03
3476 G09
3476fa
1000
105
16