RT8450 Buck (multi-topology) LED driver IC overview

Description

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RT8450 is a non-sync DC/DC Buck (multi-topology) LED driver IC from . Maximum input voltage is 40.0 V and it drives an output current of up to 1.50 A. Assuming a typical 3.5V LED forward voltage RT8450 can drive up to 9 LED in series.

The LED Buck (multi-topology) driver IC features fixed 800 kHz switching frequency, a feedback voltage of 0.19 V and requires a typical inductor size of 20.0 uH. This combination results in a peak efficiency of ~94 %. RT8450 comes in 2 package option(s) - WDFN-12 TSSOP-16 .

Parameter and feature overview

ParameterValueReplacement
Search Filter
Nr. of Channel 1
V-IN min. 4.5 V
V-IN max. 40.0 V
Nr.of LEDs max. 9
I-OUT? 1.50 A
MOSFET intern
ext.clock sync. no
sync/non-sync non-sync
Frequency typ. 800 kHz
Frequency adjustable fixed
Frequency min.
Frequency max.
Softstart yes
Softstart adjustable yes
Quiescent current max. 6000 uA
Operating min. -40 °C
Operating max. 85 °C
Junction min. -40 °C
Junction max. 125 °C
thermal shutdown typ.
Inductor size 20.0 uH
Inductor suggested by Würth Elektronik
Feedback Voltage 0.19 V
Automotive AEC-Q100 no
Topology Buck (multi-topology)
Peak Efficiency 94 %
Component count min. 9
DC Dimming yes
PWM Dimming yes
digital dimming no
Nr. of package options 2
SC70
SOT
MSOP
QFN/DFN WDFN-12
SO/SOIC
SOP TSSOP-16
DIP
TO
Variation
LED temperature compensation

RT8450 Datasheet

Link to the most up-to-date RT8450 datasheet and the product page for EVM, tools and support information.

RT8450

RT8450 inventory, samples and price

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Equivalents and alternatives

The following DC/DC LED Buck (multi-topology) driver are similar to RT8450. Optional, compare RT8450 side-by-side with other LED driver via the Comparison function.

Variation Compare Product Manufacturer Package
0% PAM2863 PAM2863 product overviewPAM2863 product overview Diodes PSOP-8
0% RT8450B RT8450B product overviewRT8450B product overview Richtek WDFN-12, TSSOP-16
0% RT8463 RT8463 product overviewRT8463 product overview Richtek WDFN-12, TSSOP-14
0% RT8453B RT8453B product overviewRT8453B product overview Richtek SOP-8
25% GT5315 GT5315 product overviewGT5315 product overview Giantec SOT89-5, SOP-8
25% RT8470 RT8470 product overviewRT8470 product overview Richtek SOT23-5, SOP-8
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% 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% RT8472 RT8472 product overviewRT8472 product overview Richtek SOT23-5
50% RT8473 RT8473 product overviewRT8473 product overview Richtek SOT23-5
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 RT8450.

V-IN min. 4.5 V, V-IN max. 40 V, I-OUT 1.5 A, Frequency typ. 800 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
74404052068 6.8 1.9 2.4 82.70 5 x 5 x 2
74404052075 7.5 1.7 2.1 96.80 5 x 5 x 2
74404052100 10.0 1.6 2.0 109.00 5 x 5 x 2
74404054068 6.8 2.5 3.2 43.00 5 x 5 x 4
74404054100 10.0 2.1 2.5 64.00 5 x 5 x 4
74404063068 6.8 2.4 2.8 47.00 6 x 6 x 2.8
74404063082 8.2 2.3 2.5 55.00 6 x 6 x 2.8
74404063100 10.0 2.0 2.2 72.00 6 x 6 x 2.8
74404064100 10.0 2.5 3.5 48.00 6 x 6 x 4.5
744062006 6.2 1.9 1.8 40.00 6.8 x 6.8 x 2.5
7440650068 6.8 4.2 3.6 25.00 10 x 10 x 3.1
7440650082 8.2 3.8 2.8 28.50 10 x 10 x 3.1
744065100 10.0 3.0 2.5 40.00 10 x 10 x 3.1
7440700068 6.8 2.4 1.8 56.00 8 x 8 x 2
744071100 10.0 3.4 2.8 28.00 8 x 8 x 4.6
74408943068 6.8 2.0 2.7 51.00 4.8 x 4.8 x 4.1
74408943082 8.2 1.8 2.2 70.00 4.8 x 4.8 x 4.1
74408943100 10.0 1.7 2.1 82.00 4.8 x 4.8 x 4.1
74437324068 6.8 1.8 3.5 150.00 4.45 x 4.06 x 2
74437324082 8.2 1.6 2.8 158.00 4.45 x 4.06 x 2
74437324100 10.0 1.5 2.4 215.00 4.45 x 4.06 x 2
74438336068 6.8 1.6 2.9 168.00 3 x 3 x 2
7447462068 6.8 3.3 3.0 27.00 5.5 x 5.5 x 8.5
7447462100 10.0 2.5 2.6 55.00 5.5 x 5.5 x 8.5
744773068 6.8 1.5 2.1 76.00 4 x 4.5 x 3.5
744773082 8.2 1.5 1.8 116.00 4 x 4.5 x 3.5
74477510 10.0 2.3 3.0 40.00 7 x 7.8 x 5.5
74477610 10.0 3.0 3.2 27.50 9 x 10 x 5.9
74477710 10.0 2.0 2.6 45.00 7.3 x 7.3 x 4.5
7447779006 6.8 2.9 3.3 33.00 7.3 x 7.3 x 4.5
7447779008 8.2 2.7 3.0 47.00 7.3 x 7.3 x 4.5
744777910 10.0 2.0 2.6 45.00 7.3 x 7.3 x 4.5
74477810 10.0 1.8 2.2 68.00 7.3 x 7.3 x 3.4
7447785006 6.8 2.3 2.0 79.00 5.9 x 6.2 x 3.3
7447786006 6.8 2.5 2.3 62.00 5.9 x 6.2 x 5.1
7447786008 8.2 2.3 2.1 66.00 5.9 x 6.2 x 5.1
744778610 10.0 2.1 1.8 74.00 5.9 x 6.2 x 5.1
7447789006 6.8 2.5 2.8 41.50 7.3 x 7.3 x 3.5
744778910 10.0 1.8 2.2 64.00 7.3 x 7.3 x 3.5
744779068 6.8 2.2 2.8 27.00 6 x 6 x 6.5
744779100 10.0 1.9 2.1 38.60 6 x 6 x 6.5
744787068 6.8 3.0 3.0 27.00 7.8 x 7 x 5
744787082 8.2 2.7 2.8 33.00 7.8 x 7 x 5
744787100 10.0 2.6 2.6 36.50 7.8 x 7 x 5
784773068 6.8 1.5 2.1 76.00 4 x 4.5 x 3.5
784773082 8.2 1.5 1.8 116.00 4 x 4.5 x 3.5
78477410 10.0 2.2 2.5 78.00 5.2 x 5.8 x 4.85
784775082 8.2 3.2 3.2 24.00 7 x 7.8 x 5.5
78477510 10.0 2.3 3.0 40.00 7 x 7.8 x 5.5
78477610 10.0 3.0 3.2 28.00 9 x 10 x 5.9
784777068 6.8 2.2 3.2 83.00 7.3 x 7.3 x 4.3
784777082 8.2 2.0 2.8 97.50 7.3 x 7.3 x 4.3
784777100 10.0 1.9 2.6 105.00 7.3 x 7.3 x 4.3
784778068 6.8 2.3 2.5 79.00 7.3 x 7.3 x 3.5
784778082 8.2 2.2 2.4 86.00 7.3 x 7.3 x 3.5
784778100 10.0 1.9 2.2 105.00 7.3 x 7.3 x 3.5
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