LT3518IUF#TRPBF Linear Technology, LT3518IUF#TRPBF Datasheet - Page 7

• Manufacturer Part Number: LT3518IUF#TRPBF
• Description: IC LED DRIVER AUTOMOTIVE 16-QFN
• Manufacturer: Linear Technology
• Type: Automotiver

Specifications of LT3518IUF#TRPBF

• 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-QFN
• Operating Temperature: -40°C ~ 125°C
• Current - Output / Channel: 2.8A
• Internal Switch(s): Yes
• Efficiency: 88%
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

BLOCK DIAGRAM
PV
IN
SHDN
CTRL
FB
V
SYNC
SS
R
C
T
1.01V
+
ISP
R
1V
SENSE
X10
1V
V
–
IN
ISN
–
+
+
+
–
10µA
CURRENT
SENSE
AMPLIFIER
A1
A2
+
–
1V
A5
+
+
–
A6
+
+
ADJUST
FREQ
SS
C
A3
IN
Figure 1. Buck Mode LED Driver
AMPLIFIER
Q2
ERROR
MOSFET DRIVER
2.5MHz TO 250kHz
V
TG
ISP
OSCILLATOR
GENERATOR
V
ISP
– 7V
RAMP
LED ARRAY
–
+
V
COMPARATOR
IN
A4
PWM
TGEN
R
S
Q
C
FILT
PWM
2V
–
+
MAIN SWITCH
DRIVER
A7
A8
100µA
+
–
SW SW
V
IN
LT3518
Q1
MAIN
SWITCH
V
GND
REF
3518 F01
3518fd
7