RT8482 Buck LED driver IC overview

Description

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RT8482 is a non-sync DC/DC Buck LED driver IC from . Maximum input voltage is 48.0 V and it drives an output current of up to 2.00 A. Assuming a typical 3.5V LED forward voltage RT8482 can drive up to 12 LED in series.

The LED Buck driver IC features fixed 350 kHz switching frequency, a feedback voltage of 0.19 V and requires a typical inductor size of 47.0 uH. This combination results in a peak efficiency of ~95 %. RT8482 comes in 2 package option(s) - WQFN-16 SOP-16 .

Parameter and feature overview

ParameterValueReplacement
Search Filter
Nr. of Channel 1
V-IN min. 4.5 V
V-IN max. 48.0 V
Nr.of LEDs max. 12
I-OUT? 2.00 A
MOSFET extern
ext.clock sync. no
sync/non-sync non-sync
Frequency typ. 350 kHz
Frequency adjustable fixed
Frequency min.
Frequency max.
Softstart yes
Softstart adjustable yes
Quiescent current max. 7200 uA
Operating min.
Operating max.
Junction min. -40 °C
Junction max. 125 °C
thermal shutdown typ. 145.0 °C
Inductor size 47.0 uH
Inductor suggested by Würth Elektronik
Feedback Voltage 0.19 V
Automotive AEC-Q100 no
Topology Buck
Peak Efficiency 95 %
Component count min. 11
DC Dimming yes
PWM Dimming yes
digital dimming no
Nr. of package options 2
SC70
SOT
MSOP
QFN/DFN WQFN-16
SO/SOIC
SOP SOP-16
DIP
TO
Variation
LED temperature compensation no

RT8482 Datasheet

Link to the most up-to-date RT8482 datasheet and the product page for EVM, tools and support information.

RT8482

RT8482 inventory, samples and price

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Equivalents and alternatives

The following DC/DC LED Buck driver are similar to RT8482. Optional, compare RT8482 side-by-side with other LED driver via the Comparison function.

Variation Compare Product Manufacturer Package
0% MP24894 MP24894 product overviewMP24894 product overview MPS TSOT23-6
25% RT8452 RT8452 product overviewRT8452 product overview Richtek WQFN-16, SOP-16

Inductor suggestions

Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of RT8482.

V-IN min. 4.5 V, V-IN max. 48 V, I-OUT 2 A, Frequency typ. 350 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
74404064120 12.0 2.2 3.0 58.00 6 x 6 x 4.5
74404064150 15.0 2.1 2.7 68.00 6 x 6 x 4.5
74404084120 12.0 2.8 3.8 40.00 8 x 8 x 4.2
74404084150 15.0 2.6 3.2 47.00 8 x 8 x 4.2
74404084180 18.0 2.4 2.9 53.00 8 x 8 x 4.2
744066150 15.0 3.2 3.3 37.00 10 x 10 x 4.1
744066180 18.0 2.8 3.0 54.00 10 x 10 x 4.1
744771115 15.0 3.8 4.6 25.00 12 x 12 x 6
744771118 18.0 3.5 4.3 29.00 12 x 12 x 6
7447713150 15.0 2.2 3.4 74.00 10 x 10 x 3
7447714150 15.0 3.5 4.1 36.00 10 x 10 x 5
7447715120 12.0 3.5 3.6 30.00 12 x 12 x 4.5
7447715180 18.0 3.2 3.2 37.00 12 x 12 x 4.5
7447720150 15.0 2.4 3.0 33.40 7.8 x 7.8 x 10
7447720180 18.0 3.1 3.5 41.00 7.8 x 7.8 x 10
744772200 20.0 2.6 3.5 38.00 7.8 x 7.8 x 10
744776112 12.0 2.7 3.2 32.60 9 x 10 x 5.9
744776115 15.0 2.5 2.9 34.00 9 x 10 x 5.9
744776118 18.0 2.4 2.4 42.80 9 x 10 x 5.9
7447798131 13.0 5.9 4.5 19.90 10.2 x 10.2 x 6.4
7447798151 15.0 5.5 4.0 21.80 10.2 x 10.2 x 6.4
7447798181 18.0 5.0 3.8 30.50 10.2 x 10.2 x 6.4
744787120 12.0 2.5 2.4 45.00 7.8 x 7 x 5
784776112 12.0 2.7 3.2 33.00 9 x 10 x 5.9
784776115 15.0 2.5 2.9 34.00 9 x 10 x 5.9
784776118 18.0 2.4 2.4 43.00 9 x 10 x 5.9
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