LT3518EFE#PBF Linear Technology, LT3518EFE#PBF Datasheet - Page 15

• Manufacturer Part Number: LT3518EFE#PBF
• Description: IC LED DRIVR AUTOMOTIVE 16-TSSOP
• Manufacturer: Linear Technology
• Type: Automotiver

Specifications of LT3518EFE#PBF

• Constant Current: Yes
• Constant Voltage: Yes
• Topology: PWM, Step-Down (Buck), Step-Up (Boost)
• Number Of Outputs: 1
• Internal Driver: No
• Type - Primary: Automotive, Backlight
• Type - Secondary: White LED
• Frequency: 250kHz ~ 2.5MHz
• Voltage - Supply: 3 V ~ 30 V
• Voltage - Output: 7V
• Mounting Type: Surface Mount
• Package / Case: 16-TSSOP Exposed Pad, 16-eTSSOP, 16-HTSSOP
• Operating Temperature: -40°C ~ 125°C
• Current - Output / Channel: 2.8A
• Internal Switch(s): Yes
• Efficiency: 88%
• Led Driver Application: Display Backlighting, Automotive And Avionic Lighting
• No. Of Outputs: 1
• Output Current: 2.3A
• Output Voltage: 45V
• Input Voltage: 3V To 30V
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

TYPICAL APPLICATIONS
5V/DIV
1A/DIV
1A/DIV
PWM
I
LED
I
L1
PV
f
I
OSC
LED
IN
= 1.2MHz
= 1A
= 32V
1000:1 PWM Dimming at 120Hz
PV
3.3V
32V
V
IN
IN
2.2µF
SYNC
PWM
V
3.3V, 1.2MHz
REF
C1
2µs/DIV
Buck Mode 1A LED Driver with Open LED Protection and Sync Input
C2
2.2µF
V
SHDN
CTRL
PWM
SYNC
TGEN
IN
ISP
R
100m
0.1µF
SENSE
V
3518 TA05b
LT3518
REF
C4
ISN
V
C
M1
TG
GND
SW
SS
R
FB
LED1
LED6
T
1A
FB
R
16.9k
1MHz
5.62k
T
L1
10µH
R3
3518 TA05a
C5
0.1µF
D1
Q1
R1
49.9k
R2
2.00k
FB
C1: KEMET C0806C225K4RAC
C2: MURATA GRM31MR71E225KA93
C3: MURATA GRM32DR71E106KA12B
C4, C5: MURATA GRM21BR71H104KA01B
D1: ZETEX ZLLS2000TA
L1: TOKO B992AS-100M
LEDS: LUXEON III (WHITE)
M1: ZETEX ZXMP6A13GTA
Q1: PHILIPS PMBT3906
100
90
80
70
60
50
40
C3
10µF
0
CTRL = V
20
REF
PWM DUTY CYCLE (%)
Efficiency
40
60
80
3518 TA05c
100
LT3518
15
3518fd