LT3478 LED Boost Driver overview

Description

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LT3478 is a 1 channel, 36.0 V, 1.05 A/string non-sync LED Boost Driver. It can drive a maximum of 12 LED (~3.5Vfwd) per string, features a adjustable 2250 kHz frequency and is available in 1 package option(s): TSSOP-16 .

Further characteristics are a feedback voltage of 0.350 V, a typical inductor size of 10.0 uH and a peak efficiency of 90 %.

Parameter and features overview

ParameterValueReplacement
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Nr. of Channel 1
V-IN min. 2.8 V
V-IN max. 36.0 V
V-OUT max. 41.0 V
Nr.of LED per string typ. 12
I-OUT/string? 1.05 A
current limit typ. 6.00 A
sync/non-sync non-sync
Frequency typ. 2250 kHz
Frequency adjustable
Frequency min. 200 kHz
Frequency max. 2250 kHz
Softstart yes
Softstart adjustable yes
Down-Mode no
Quiescent current max. -6100 uA
Operating min.
Operating max.
Junction min. -40 °C
Junction max. 125 °C
thermal shutdown typ.
Inductor size typ. 10.0 uH
feedback voltage 0.350 V
Automotive AEC-Q100 no
Topology Boost
Peak Efficiency 90 %
Component count min. 12
DC dimming yes
PWM dimming yes
PWM frequency min. 0.10 kHz
PWM frequency max. 10.0 kHz
digital dimming no
digital interface no
LED flash no
TxMask no
Nr.of current sources 1
Nr.of package options 1
CSP
SC70
SOT
MSOP
QFN/DFN
SO/SOIC
SOP TSSOP-16
DIP

LT3478 Datasheet

Link to the most up-to-date LT3478 datasheet and the product page for EVM, tools and support information.

LT3478

LT3478 inventory, samples and price

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List with equivalents & alternatives

The following DC/DC LED Boost driver are similar to LT3478. Optional, compare LT3478 side-by-side with other LED driver via the comparison function.

Variation Compare Product Manufacturer Package
50% LT3518 LT3518 product overviewLT3518 product overview Linear Technology QFN-16, TSSOP-16

Inductor suggestions

Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of LT3478.

V-IN min. 2.8 V, V-OUT max. 41 V, current limit typ. 6 A, Frequency typ. 2250 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
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