RT8452 Buck (multi-topology) LED driver IC overview
Description
RT8452 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 2.00 A. Assuming a typical 3.5V LED forward voltage RT8452 can drive up to 8 LED in series.
The LED Buck (multi-topology) 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 %. RT8452 comes in 2 package option(s) - WQFN-16 SOP-16 .
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? | 2.00 A | |
| MOSFET | extern | |
| ext.clock sync. |  |
|
| sync/non-sync | non-sync | |
| Frequency typ. | 350 kHz | |
| Frequency adjustable | fixed | |
| Frequency min. | ||
| Frequency max. | ||
| 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 | 47.0 uH | |
| Inductor suggested by Würth Elektronik | ||
| Feedback Voltage | 0.19 V | |
| Automotive AEC-Q100 | |
|
| Topology | Buck (multi-topology) | |
| Peak Efficiency | 95 % | |
| Component count min. | 11 | |
| DC Dimming | |
|
| PWM Dimming | |
|
| digital dimming | |
|
| Nr. of package options | 2 | |
| SC70 | ||
| SOT | ||
| MSOP | ||
| QFN/DFN | WQFN-16 | |
| SO/SOIC | ||
| SOP | SOP-16 | |
| DIP | ||
| TO | ||
| Variation | ||
| LED temperature compensation | |
RT8452 Datasheet
Link to the most up-to-date RT8452 datasheet and the product page for EVM, tools and support information.
RT8452 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 RT8452. Optional, compare RT8452 side-by-side with other LED driver via the Comparison function.
| Variation | Compare | Product | Manufacturer | Package | |
| 0% | MP24894 |  MP24894 product overview |
MPS | TSOT23-6 | |
| 0% | RT8482 | RT8482 product overview |
Richtek | WQFN-16, SOP-16 |
Inductor suggestions
Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of RT8452.
| 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 | |
| 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 |
