RT8474 Buck (multi-topology) LED driver IC overview

Description

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RT8474 is a non-sync DC/DC Buck (multi-topology) LED driver IC from . Maximum input voltage is 50.0 V and it drives an output current of up to 2.00 A. Assuming a typical 3.5V LED forward voltage RT8474 can drive up to 12 LED in series.

The LED Buck (multi-topology) driver IC features fixed 490 kHz switching frequency, a feedback voltage of 0.10 V and requires a typical inductor size of 47.0 uH. This combination results in a peak efficiency of ~96 %. RT8474 comes in 1 package option(s) - SOP-8 .

Parameter and feature overview

ParameterValueReplacement
Search Filter
Nr. of Channel 1
V-IN min. 4.5 V
V-IN max. 50.0 V
Nr.of LEDs max. 12
I-OUT? 2.00 A
MOSFET intern
ext.clock sync. no
sync/non-sync non-sync
Frequency typ. 490 kHz
Frequency adjustable fixed
Frequency min.
Frequency max.
Softstart yes
Softstart adjustable no
Quiescent current max. 3000 uA
Operating min. -40 °C
Operating max. 85 °C
Junction min. -40 °C
Junction max. 125 °C
thermal shutdown typ. 150.0 °C
Inductor size 47.0 uH
Inductor suggested by Würth Elektronik
Feedback Voltage 0.10 V
Automotive AEC-Q100 no
Topology Buck (multi-topology)
Peak Efficiency 96 %
Component count min. 11
DC Dimming yes
PWM Dimming yes
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

RT8474 Datasheet

Link to the most up-to-date RT8474 datasheet and the product page for EVM, tools and support information.

RT8474

RT8474 inventory, samples and price

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Equivalents and alternatives

The following DC/DC LED Buck (multi-topology) driver are similar to RT8474. Optional, compare RT8474 side-by-side with other LED driver via the Comparison function.

Variation Compare Product Manufacturer Package
0% RT8463 RT8463 product overviewRT8463 product overview Richtek WDFN-12, TSSOP-14
0% RT4528 RT4528 product overviewRT4528 product overview Richtek SOP-8
0% RT8474A RT8474A product overviewRT8474A product overview Richtek SOP-8
25% PAM2863 PAM2863 product overviewPAM2863 product overview Diodes PSOP-8
25% G2602 G2602 product overviewG2602 product overview GMT MSOP-10, TDFN-12
25% ILD6150 ILD6150 product overviewILD6150 product overview Infineon DSO-8
25% RT8450 RT8450 product overviewRT8450 product overview Richtek WDFN-12, TSSOP-16
25% RT8450B RT8450B product overviewRT8450B product overview Richtek WDFN-12, TSSOP-16
25% RT8453B RT8453B product overviewRT8453B product overview Richtek SOP-8
50% AP8802 AP8802 product overviewAP8802 product overview Diodes DFN-10, SO-8
50% AP8802H AP8802H product overviewAP8802H product overview Diodes SO-8
50% AP8803 AP8803 product overviewAP8803 product overview Diodes TSOT25-5
50% PAM2861 PAM2861 product overviewPAM2861 product overview Diodes SOT23-5, SOT89-5
50% ZXLD1360 ZXLD1360 product overviewZXLD1360 product overview Diodes TSOT25-5
50% ZXLD1362 ZXLD1362 product overviewZXLD1362 product overview Diodes TSOT25-5
50% ZXLD1366 ZXLD1366 product overviewZXLD1366 product overview Diodes TSOT25-5, DFN-6, SO-8
50% SP7600 SP7600 product overviewSP7600 product overview Exar SO-8
50% XRP7604 XRP7604 product overviewXRP7604 product overview Exar SO-8
50% GT5315 GT5315 product overviewGT5315 product overview Giantec SOT89-5, SOP-8
50% ILD4120 ILD4120 product overviewILD4120 product overview Infineon DSO-8
50% MBI6653 MBI6653 product overviewMBI6653 product overview Macroblock MSOP-8, SOP-8
50% MBI6654 MBI6654 product overviewMBI6654 product overview Macroblock MSOP-8, SOP-8
50% MP2481 MP2481 product overviewMP2481 product overview MPS MSOP-8
50% MP2489 MP2489 product overviewMP2489 product overview MPS TSOT23-5, QFN-6
50% SD42525 SD42525 product overviewSD42525 product overview Silan Micro SOT23-6, SOP-8, SOT89-5
50% MP24895 MP24895 product overviewMP24895 product overview MPS TSOT23-5, QFN-6
50% MPQ2489 MPQ2489 product overviewMPQ2489 product overview MPS TSOT23-5, QFN-6
50% MPQ2489-AEC1 MPQ2489-AEC1 product overviewMPQ2489-AEC1 product overview MPS TSOT23-5, QFN-6
50% RT8470 RT8470 product overviewRT8470 product overview Richtek SOT23-5, SOP-8
50% RT8472 RT8472 product overviewRT8472 product overview Richtek SOT23-5
50% RT8473 RT8473 product overviewRT8473 product overview Richtek SOT23-5
50% MBI6663 MBI6663 product overviewMBI6663 product overview Macroblock SOP-8, TO252-5
50% XRP7613 XRP7613 product overviewXRP7613 product overview Exar SOIC-8
50% ZXLD1360Q ZXLD1360Q product overviewZXLD1360Q product overview Diodes TSOT25-5
50% ZXLD1362Q ZXLD1362Q product overviewZXLD1362Q product overview Diodes TSOT25-5
50% ZXLD1366Q ZXLD1366Q product overviewZXLD1366Q product overview Diodes TSOT25-5, DFN-6

Inductor suggestions

Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of RT8474.

V-IN min. 4.5 V, V-IN max. 50 V, I-OUT 2 A, Frequency typ. 490 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
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