LT3474EFE#PBF Linear Technology, LT3474EFE#PBF Datasheet - Page 4

• Manufacturer Part Number: LT3474EFE#PBF
• Description: IC LED DRVR HP CONS CURR 16TSSOP
• Manufacturer: Linear Technology
• Type: High Power, Constant Currentr

Specifications of LT3474EFE#PBF

• Constant Current: Yes
• Topology: PWM, Step-Down (Buck)
• Number Of Outputs: 1
• Internal Driver: Yes
• Type - Primary: Automotive, Backlight
• Type - Secondary: Color, White LED
• Frequency: 200kHz ~ 2MHz
• Voltage - Supply: 3.5 V ~ 36 V
• Mounting Type: Surface Mount
• Package / Case: 16-TSSOP Exposed Pad, 16-eTSSOP, 16-HTSSOP
• Operating Temperature: -40°C ~ 85°C
• Current - Output / Channel: 1A
• Internal Switch(s): Yes
• No. Of Outputs: 1
• Output Current: 1A
• Output Voltage: 15V
• Input Voltage: 4V To 36V
• Dimming Control Type: PWM
• Operating Temperature Range: -40°C To +85°C
• Driver Case Style: TSSOP
• Rohs Compliant: Yes
• Led Driver Application: Automotive, Avionic Lighting
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -
• Efficiency: -

LT3474/LT3474-1
TYPICAL PERFORMANCE CHARACTERISTICS
4
1000
1000
800
200
600
400
100
2.5
0.5
1.5
0
2
1
0
0
0
LED Current vs V
Current Limit vs Duty Cycle
Oscillator Frequency vs R
T
A
= 25°C
10
MINIMUM (125°C)
0.25
20
MINIMUM (85°C)
DUTY CYCLE (%)
0.5
40
V
R
ADJ
T
(kΩ)
ADJ
(V)
0.75
TYPICAL
60
100
T
T
80
A
1
= 25°C
3474 G06
3474 G09
3474 GO3
1.25
100
1200
1000
550
450
400
600
400
600
500
800
200
1.5
2.5
0.5
0
0
2
1
–50
–50
–50 –25
LED Current vs Temperature
Oscillator Frequency vs
Temperature
Switch Current Limit vs
Temperature
R
T
–25
= 80.6k
–25
0
0
0
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
V
V
ADJ
ADJ
25
25
25
= V
= V
REF
50
50
50
REF
/5
75
75
75
100
100
100
3474 G10
3474 G07
3474 G04
125
125
125
700
600
500
400
300
200
100
600
500
400
300
200
100
2.5
1.5
0.5
0
2
1
0
0
0
Switch Voltage Drop
Current Limit vs Output Voltage
0
Oscillator Frequency Foldback
0
T
T
T
R
A
A
A
T
= 25°C
= 25°C
= 25°C
= 80.6k
2
0.5
SWITCH CURRENT (mA)
500
4
1
V
V
OUT
OUT
6
(V)
(V)
1.5
1000
8
2
10
3474 G08
3474 G11
3474 G05
3474fd
1500
2.5
12