LT3465ES6#TRMPBF Linear Technology, LT3465ES6#TRMPBF Datasheet - Page 12
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LT3465ES6#TRMPBF
Manufacturer Part Number
LT3465ES6#TRMPBF
Description
IC LED DRIVR WHITE BCKLGT TSOT-6
Manufacturer
Linear Technology
Type
Backlight, White LEDr
Datasheet
1.LT3465AES6TRMPBF.pdf
(16 pages)
Specifications of LT3465ES6#TRMPBF
Topology
PWM, Step-Up (Boost)
Number Of Outputs
1
Internal Driver
Yes
Type - Primary
Backlight
Type - Secondary
White LED
Frequency
800kHz ~ 1.6MHz
Voltage - Supply
2.7 V ~ 16 V
Voltage - Output
30V
Mounting Type
Surface Mount
Package / Case
TSOT-23-6, TSOT-6
Operating Temperature
-40°C ~ 85°C
Current - Output / Channel
20mA
Internal Switch(s)
Yes
Efficiency
81%
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
LT3465ES6#TRMPBFTR
Available stocks
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Part Number
Manufacturer
Quantity
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APPLICATIO S I FOR ATIO
LT3465/LT3465A
12
Open-Circuit Protection
The LT3465 and LT3465A have an internal open-circuit
protection circuit. In the cases of output open circuit,
when the LEDs are disconnected from the circuit or the
LEDs fail, the V
LT3465A will then switch at a very low frequency to
minimize the input current. V
output open circuit are shown in the Typical Performance
Characteristics.
Board Layout Consideration
As with all switching regulators, careful attention must be
paid to the PCB board layout and component placement.
To maximize efficiency, switch rise and fall times are
made as short as possible. To prevent electromagnetic
interference (EMI) problems, proper layout of the high
frequency switching path is essential. Place C
the V
the switching regulator to minimize interplane coupling.
In addition, the ground connection for the feedback
OUT
Figure 8. Recommended Component Placement.
and GND pins. Always use a ground plane under
C
OUT
OUT
R
FB
U
is clamped at 30V. The LT3465 and
1
2
3
U
OUT
6
5
4
and input current during
L
W
3465A F08a
C
IN
GND
V
CTRL
IN
OUT
U
next to
resistor R1 should be tied directly to the GND pin and not
shared with any other component, ensuring a clean, noise-
free connection. Recommended component placement is
shown in Figure 8.
Start-Up Input Current (LT3465A)
As previously mentioned, the LT3465A does not have an
internal soft-start circuit. Inrush current can therefore rise
to approximately 400mA as shown in Figure 9 when
driving 4 LEDs. The LT3465 has an internal soft-start
circuit and is recommended if inrush current must be
minimized.
200mV/DIV
200mV/DIV
2V/DIV
CTRL
FB
I
IN
Figure 9.
50µs/DIV
3465A F09
3465afa