RT8476A Buck-Boost (multi-topology) LED driver IC overview

Description

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RT8476A is a non-sync DC/DC Buck-Boost (multi-topology) LED driver IC from . Maximum input voltage is 40.0 V and it drives an output current of up to 0.75 A. Assuming a typical 3.5V LED forward voltage RT8476A can drive up to 9 LED in series.

The LED Buck-Boost (multi-topology) driver IC features fixed 300 kHz switching frequency, a feedback voltage of 0.24 V and requires a typical inductor size of 120.0 uH. This combination results in a peak efficiency of ~88 %. RT8476A comes in 1 package option(s) - SOP-8 .

Parameter and feature overview

ParameterValueReplacement
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Nr. of Channel 1
V-IN min. 4.5 V
V-IN max. 40.0 V
Nr.of LEDs max. 9
I-OUT? 0.75 A
MOSFET extern
ext.clock sync. no
sync/non-sync non-sync
Frequency typ. 300 kHz
Frequency adjustable fixed
Frequency min.
Frequency max.
Softstart no
Softstart adjustable no
Quiescent current max. -1500 uA
Operating min. -40 °C
Operating max. 85 °C
Junction min. -40 °C
Junction max. 125 °C
thermal shutdown typ. 155.0 °C
Inductor size 120.0 uH
Inductor suggested by Würth Elektronik
Feedback Voltage 0.24 V
Automotive AEC-Q100 no
Topology Buck-Boost (multi-topology)
Peak Efficiency 88 %
Component count min. 15
DC Dimming yes
PWM Dimming no
digital dimming no
Nr. of package options 1
SC70
SOT
MSOP
QFN/DFN
SO/SOIC
SOP SOP-8
DIP
TO
Variation
LED temperature compensation no

RT8476A Datasheet

Link to the most up-to-date RT8476A datasheet and the product page for EVM, tools and support information.

RT8476A

RT8476A inventory, samples and price

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Equivalents and alternatives

The following DC/DC LED Buck-Boost (multi-topology) driver are similar to RT8476A. Optional, compare RT8476A side-by-side with other LED driver via the Comparison function.

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Inductor suggestions

Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of RT8476A.

V-IN min. 4.5 V, V-IN max. 40 V, I-OUT 0.75 A, Frequency typ. 300 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
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