RT8462 Buck (multi-topology) LED driver IC overview
Description
RT8462 is a non-sync DC/DC Buck (multi-topology) LED driver IC from . Maximum input voltage is 36.0 V and it drives an output current of up to 0.42 A. Assuming a typical 3.5V LED forward voltage RT8462 can drive up to 8 LED in series.
The LED Buck (multi-topology) driver IC features adjustable 800 kHz switching frequency, a feedback voltage of 0.19 V and requires a typical inductor size of 22.0 uH. This combination results in a peak efficiency of ~95 %. RT8462 comes in 2 package option(s) - WQFN-16 SOP-14 .
Parameter and feature overview
| Parameter | Value | Replacement Search Filter |
| Nr. of Channel | 1 | |
| V-IN min. | 4.5 V | |
| V-IN max. | 36.0 V | |
| Nr.of LEDs max. | 8 | |
| I-OUT? | 0.42 A | |
| MOSFET | extern | |
| ext.clock sync. |  |
|
| sync/non-sync | non-sync | |
| Frequency typ. | 800 kHz | |
| Frequency adjustable | adjustable | |
| Frequency min. | 250 kHz | |
| Frequency max. | 800 kHz | |
| Softstart |  |
|
| Softstart adjustable | |
|
| 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 | 22.0 uH | |
| Inductor suggested by Würth Elektronik | ||
| Feedback Voltage | 0.19 V | |
| Automotive AEC-Q100 | |
|
| Topology | Buck (multi-topology) | |
| Peak Efficiency | 95 % | |
| Component count min. | 13 | |
| DC Dimming | |
|
| PWM Dimming | |
|
| digital dimming | |
|
| Nr. of package options | 2 | |
| SC70 | ||
| SOT | ||
| MSOP | ||
| QFN/DFN | WQFN-16 | |
| SO/SOIC | ||
| SOP | SOP-14 | |
| DIP | ||
| TO | ||
| Variation | ||
| LED temperature compensation | |
RT8462 Datasheet
Link to the most up-to-date RT8462 datasheet and the product page for EVM, tools and support information.
RT8462 inventory, samples and price
Available Distributors with stock: 0
Available Distributors with stock: 0
Equivalents and alternatives
The following DC/DC LED Buck (multi-topology) driver are similar to RT8462. Optional, compare RT8462 side-by-side with other LED driver via the Comparison function.
| Variation | Compare | Product | Manufacturer | Package | |
| 0% | MP4600 |  MP4600 product overview |
MPS | QFN-10 | |
| 0% | RT8475 | RT8475 product overview |
Richtek | WQFN-16, SOP-14 | |
| 50% | MP4601 | MP4601 product overview |
MPS | SOIC-16, TSSOP-16 | |
| 50% | MP4603 | MP4603 product overview |
MPS | SOIC-16, TSSOP-16 |
Inductor suggestions
Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of RT8462.
| Order Code | Spec | L (µH) | IR (A) | ISAT (A) | RDC (mΩ) | L x W x H (mm) |
| 744025220 | 22.0 | 0.5 | 0.8 | 525.00 | 2.8 x 2.8 x 3 | |
| 744025270 | 27.0 | 0.5 | 0.7 | 745.00 | 2.8 x 2.8 x 3 | |
| 74404024220 | 22.0 | 0.5 | 0.6 | 910.00 | 2.5 x 2 x 1.2 | |
| 74404032220 | 22.0 | 0.6 | 0.6 | 450.00 | 3 x 3 x 1.5 | |
| 74404032330 | 33.0 | 0.5 | 0.5 | 911.00 | 3 x 3 x 1.5 | |
| 74404041330 | 33.0 | 0.7 | 0.6 | 628.00 | 4 x 4 x 1.2 | |
| 74404042330 | 33.0 | 0.7 | 0.9 | 460.00 | 4 x 4 x 1.8 | |
| 744042220 | 22.0 | 0.9 | 0.6 | 280.00 | 4.8 x 4.8 x 2 | |
| 744043220 | 22.0 | 0.9 | 0.7 | 160.00 | 4.8 x 4.8 x 3 | |
| 744043270 | 27.0 | 0.9 | 0.6 | 170.00 | 4.8 x 4.8 x 3 | |
| 744043330 | 33.0 | 0.8 | 0.6 | 195.00 | 4.8 x 4.8 x 3 | |
| 744045220 | 22.0 | 0.6 | 1.0 | 560.00 | 4.5 x 3.2 x 2.9 | |
| 744045330 | 33.0 | 0.4 | 0.9 | 880.00 | 4.5 x 3.2 x 2.9 | |
| 744052220 | 22.0 | 0.8 | 0.9 | 240.00 | 5.8 x 5.8 x 2 | |
| 744052270 | 27.0 | 0.8 | 0.8 | 250.00 | 5.8 x 5.8 x 2 | |
| 744053220 | 22.0 | 1.2 | 0.9 | 100.00 | 5.8 x 5.8 x 3 | |
| 744053270 | 27.0 | 1.1 | 0.8 | 135.00 | 5.8 x 5.8 x 3 | |
| 744053330 | 33.0 | 0.9 | 0.8 | 180.00 | 5.8 x 5.8 x 3 | |
| 744062220 | 22.0 | 1.2 | 1.0 | 100.00 | 6.8 x 6.8 x 2.5 | |
| 744062330 | 33.0 | 0.9 | 0.8 | 150.00 | 6.8 x 6.8 x 2.5 | |
| 7440680220 | 22.0 | 0.9 | 0.7 | 350.00 | 8 x 8 x 1.2 | |
| 7440690220 | 22.0 | 1.0 | 0.9 | 272.00 | 8 x 8 x 1.5 | |
| 7440700220 | 22.0 | 1.3 | 1.0 | 166.00 | 8 x 8 x 2 | |
| 74408941330 | 33.0 | 0.5 | 0.9 | 1,015.00 | 4.8 x 4.8 x 2.1 | |
| 744773127 | 27.0 | 0.9 | 1.0 | 328.00 | 4 x 4.5 x 3.5 | |
| 744773133 | 33.0 | 0.9 | 0.9 | 370.00 | 4 x 4.5 x 3.5 | |
| 744773139 | 39.0 | 0.8 | 0.9 | 418.00 | 4 x 4.5 x 3.5 | |
| 784773127 | 27.0 | 0.9 | 1.0 | 328.00 | 4 x 4.5 x 3.5 | |
| 784773133 | 33.0 | 0.9 | 0.9 | 370.00 | 4 x 4.5 x 3.5 | |
| 784773139 | 39.0 | 0.8 | 0.9 | 418.00 | 4 x 4.5 x 3.5 |
