LT3518EFE#PBF Linear Technology, LT3518EFE#PBF Datasheet - Page 14

• 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

LT3518
TYPICAL APPLICATIONS
14
200mA/DIV
5V/DIV
1A/DIV
PWM
I
LED
I
L1
V
f
I
OSC
LED
IN
= 10V
= 300mA
= 2MHz
3000:1 PWM Dimming at 120Hz
8V TO 16V
500ns/DIV
V
IN
C1: KEMET C0806C225K4RAC
C2: KEMET C1206C475K3RAC
C3, C4: MURATA GRM21BR71H104KA01B
C5: MURATA GRM21BR71H224KA01B
D1: ZETEX ZLLS2000TA
L1: TOKO B992AS-4R3N
LEDS: LUXEON I (WHITE)
M1: ZETEX ZXMP6A13GTA
C1
2.2µF
PWM
3518 TA04b
0.1µF
C4
Buck-Boost Mode LED Driver
PWM
TGEN
V
CTRL
SYNC
V
SHDN
REF
C
2MHz
6.04k
R
T
R
V
LT3518
IN
T
SS
4.3µH
L1
C3
0.1µF
SW
GND
ISP
ISN
TG
FB
D1
90
80
70
60
50
30
20
40
R1
3.92M
R2
124k
0
V
CTRL = V
IN
M1
= 10V
R
330m
300mA
SENSE
20
REF
PWM DUTY CYCLE (%)
Efficiency
40
C2
4.7µF
C5
0.22µF
3518 TA04a
60
80
3518 TA04c
100
3518fd