RT8479B Buck-Boost (multi-topology) LED driver IC overview

Description

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RT8479B 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 1.50 A. Assuming a typical 3.5V LED forward voltage RT8479B can drive up to 9 LED in series.

The LED Buck-Boost (multi-topology) driver IC features fixed 600 kHz switching frequency, a feedback voltage of 0.13 V and requires a typical inductor size of 68.0 uH. This combination results in a peak efficiency of ~88 %. RT8479B 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. 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. 600 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. 150.0 °C
Inductor size 68.0 uH
Inductor suggested by Würth Elektronik
Feedback Voltage 0.13 V
Automotive AEC-Q100 no
Topology Buck-Boost (multi-topology)
Peak Efficiency 88 %
Component count min. 14
DC Dimming no
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

RT8479B Datasheet

Link to the most up-to-date RT8479B datasheet and the product page for EVM, tools and support information.

RT8479B

RT8479B inventory, samples and price

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ProductStockPriceBuy
RT8479BGSP 0
10000.79 SGD
5000.83 SGD
2500.98 SGD
1001.07 SGD
251.22 SGD
11.27 SGD
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Equivalents and alternatives

The following DC/DC LED Buck-Boost (multi-topology) driver are similar to RT8479B. Optional, compare RT8479B 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% ZXLD1374 ZXLD1374 product overviewZXLD1374 product overview Diodes TSSOP-20
0% ILD4180 ILD4180 product overviewILD4180 product overview Infineon DSO-8
0% ILD6150 ILD6150 product overviewILD6150 product overview Infineon DSO-8
0% TLD5085 TLD5085 product overviewTLD5085 product overview Infineon DSO-8
0% MP24833 MP24833 product overviewMP24833 product overview MPS SOIC-8
0% RT8450 RT8450 product overviewRT8450 product overview Richtek WDFN-12, TSSOP-16
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% LED5000 LED5000 product overviewLED5000 product overview ST PowerSO-8
0% TS19378CS TS19378CS product overviewTS19378CS product overview Taiwan Semi SOP-8
0% LC5720S LC5720S product overviewLC5720S product overview Sanken-Semi SOP-8
0% RT4528 RT4528 product overviewRT4528 product overview Richtek SOP-8
0% RT8453B RT8453B product overviewRT8453B product overview Richtek SOP-8
0% RT8474 RT8474 product overviewRT8474 product overview Richtek SOP-8
0% RT8474A RT8474A product overviewRT8474A product overview Richtek SOP-8
0% ZXLD1374Q ZXLD1374Q product overviewZXLD1374Q product overview Diodes TSSOP-20
10% AL8806 AL8806 product overviewAL8806 product overview Diodes MSOP-8
10% AL8807 AL8807 product overviewAL8807 product overview Diodes MSOP-8, SOT25-5
10% AL8807A AL8807A product overviewAL8807A product overview Diodes MSOP-8, SOT25-5
10% G2602 G2602 product overviewG2602 product overview GMT MSOP-10, TDFN-12
10% AL8807B AL8807B product overviewAL8807B product overview Diodes MSOP-8
10% AL8807BQ AL8807BQ product overviewAL8807BQ product overview Diodes MSOP-8
25% ACT111A ACT111A product overviewACT111A product overview Active Semi SOT23-6
25% AOZ1084DI AOZ1084DI product overviewAOZ1084DI product overview Alpha Omega DFN-8
25% GT5315 GT5315 product overviewGT5315 product overview Giantec SOT89-5, SOP-8
25% ILD4120 ILD4120 product overviewILD4120 product overview Infineon DSO-8
25% IS31LT3360 IS31LT3360 product overviewIS31LT3360 product overview ISSI SOT89-5
25% IS31LT3380 IS31LT3380 product overviewIS31LT3380 product overview ISSI SOP-8
25% MP2481 MP2481 product overviewMP2481 product overview MPS MSOP-8
25% BD9207FPS BD9207FPS product overviewBD9207FPS product overview Rohm TO252-5
25% ZLED7020 ZLED7020 product overviewZLED7020 product overview ZMDI SOT89-5
25% ZLED7030 ZLED7030 product overviewZLED7030 product overview ZMDI SOP-8
25% AL8806Q AL8806Q product overviewAL8806Q product overview Diodes MSOP-8
25% AL8807Q AL8807Q product overviewAL8807Q product overview Diodes MSOP-8
25% RT8470 RT8470 product overviewRT8470 product overview Richtek SOT23-5, SOP-8
25% XRP7613 XRP7613 product overviewXRP7613 product overview Exar SOIC-8
50% AOZ1083CI AOZ1083CI product overviewAOZ1083CI product overview Alpha Omega SOT23-6
50% AL8805 AL8805 product overviewAL8805 product overview Diodes SOT25-5
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% XRP7604 XRP7604 product overviewXRP7604 product overview Exar SO-8
50% G2610 G2610 product overviewG2610 product overview GMT SOT23-5, SOP-8, SOT89-5
50% G2620 G2620 product overviewG2620 product overview GMT SOT23-5, SOP-8, SOT89-5
50% ILD6070 ILD6070 product overviewILD6070 product overview Infineon DSO-8
50% IS31LT3350 IS31LT3350 product overviewIS31LT3350 product overview ISSI SOT23-5, SOT89-5
50% IS31LT3352 IS31LT3352 product overviewIS31LT3352 product overview ISSI SOP-8
50% MBI6651 MBI6651 product overviewMBI6651 product overview Macroblock MSOP-8, SOT23-6, TO252-5
50% MBI6652 MBI6652 product overviewMBI6652 product overview Macroblock MSOP-8, SOT23-6
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% MBI6655 MBI6655 product overviewMBI6655 product overview Macroblock SOT89-5, SOP-8
50% MBI6661 MBI6661 product overviewMBI6661 product overview Macroblock SOP-8, TO252-5
50% MAX16832 MAX16832 product overviewMAX16832 product overview Maxim Integrated SOIC-8
50% MIC3201 MIC3201 product overviewMIC3201 product overview Micrel SOIC-8
50% MIC3202 MIC3202 product overviewMIC3202 product overview Micrel SOIC-8
50% MIC3202-1 MIC3202-1 product overviewMIC3202-1 product overview Micrel SOIC-8
50% MP2370 MP2370 product overviewMP2370 product overview MPS TSOT23-5
50% MP2489 MP2489 product overviewMP2489 product overview MPS TSOT23-5, QFN-6
50% MP24892 MP24892 product overviewMP24892 product overview MPS TSOT23-5
50% MP24893 MP24893 product overviewMP24893 product overview MPS TSOT23-5, QFN-6
50% MP4688 MP4688 product overviewMP4688 product overview MPS SOIC-8
50% MP4689 MP4689 product overviewMP4689 product overview MPS SOIC-8
50% NCL30160 NCL30160 product overviewNCL30160 product overview ON Semiconductor SOIC-8
50% SD42522 SD42522 product overviewSD42522 product overview Silan Micro SOP-8
50% SD42524 SD42524 product overviewSD42524 product overview Silan Micro SOP-8
50% SD42525 SD42525 product overviewSD42525 product overview Silan Micro SOT23-6, SOP-8, SOT89-5
50% SD42560 SD42560 product overviewSD42560 product overview Silan Micro SOP-8
50% HV9918 HV9918 product overviewHV9918 product overview Supertex DFN-8
50% HV9967B HV9967B product overviewHV9967B product overview Supertex MSOP-8, DFN-8
50% LM3405A LM3405A product overviewLM3405A product overview Texas Instruments MSOP-8, SOT23-6
50% ZLED7320 ZLED7320 product overviewZLED7320 product overview ZMDI DFN-5
50% ZLED7520 ZLED7520 product overviewZLED7520 product overview ZMDI DFN-5
50% ZLED7330 ZLED7330 product overviewZLED7330 product overview ZMDI SOP-8
50% ZLED7530 ZLED7530 product overviewZLED7530 product overview ZMDI SOP-8
50% ZLED7010 ZLED7010 product overviewZLED7010 product overview ZMDI SOP-8
50% GGD42522 GGD42522 product overviewGGD42522 product overview Golden Gate SOP-8
50% GGD42524 GGD42524 product overviewGGD42524 product overview Golden Gate ESOP-8
50% GGD42525 GGD42525 product overviewGGD42525 product overview Golden Gate SOT89-5
50% GGD42527 GGD42527 product overviewGGD42527 product overview Golden Gate ESOP-8
50% GGD42522 GGD42522 product overviewGGD42522 product overview Golden Gate SOP-8
50% AL8808 AL8808 product overviewAL8808 product overview Diodes TSOT25-5
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% MBI6663 MBI6663 product overviewMBI6663 product overview Macroblock SOP-8, TO252-5
50% MBI6656 MBI6656 product overviewMBI6656 product overview Macroblock SOT89-5, SOP-8, TO252-5, SOT23-6
50% IS31LT3353 IS31LT3353 product overviewIS31LT3353 product overview ISSI 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 RT8479B.

V-IN min. 4.5 V, V-IN max. 40 V, I-OUT 1.5 A, Frequency typ. 600 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
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