MBI6661 Buck LED driver IC overview
Description
MBI6661 is a non-sync DC/DC Buck LED driver IC from . Maximum input voltage is 60.0 V and it drives an output current of up to 1.00 A. Assuming a typical 3.5V LED forward voltage MBI6661 can drive up to 16 LED in series.
The LED Buck driver IC features fixed 400 kHz switching frequency, a feedback voltage of 0.10 V and requires a typical inductor size of 68.0 uH. This combination results in a peak efficiency of ~97 %. MBI6661 comes in 2 package option(s) - SOP-8 TO252-5 .
Parameter and feature overview
| Parameter | Value | Replacement Search Filter |
| Nr. of Channel | 1 | |
| V-IN min. | 9.0 V | |
| V-IN max. | 60.0 V | |
| Nr.of LEDs max. | 16 | |
| I-OUT? | 1.00 A | |
| MOSFET | intern | |
| ext.clock sync. |  |
|
| sync/non-sync | non-sync | |
| Frequency typ. | 400 kHz | |
| Frequency adjustable | fixed | |
| Frequency min. | ||
| Frequency max. | ||
| Softstart |  |
|
| Softstart adjustable | |
|
| Quiescent current max. | 4000 uA | |
| Operating min. | -40 °C | |
| Operating max. | 125 °C | |
| Junction min. | -40 °C | |
| Junction max. | 150 °C | |
| thermal shutdown typ. | 155.0 °C | |
| Inductor size | 68.0 uH | |
| Inductor suggested by Würth Elektronik | ||
| Feedback Voltage | 0.10 V | |
| Automotive AEC-Q100 | |
|
| Topology | Buck | |
| Peak Efficiency | 97 % | |
| Component count min. | 5 | |
| DC Dimming | |
|
| PWM Dimming | |
|
| digital dimming | |
|
| Nr. of package options | 2 | |
| SC70 | ||
| SOT | ||
| MSOP | ||
| QFN/DFN | ||
| SO/SOIC | ||
| SOP | SOP-8 | |
| DIP | ||
| TO | TO252-5 | |
| Variation | ||
| LED temperature compensation | |
MBI6661 Datasheet
Link to the most up-to-date MBI6661 datasheet and the product page for EVM, tools and support information.
MBI6661 inventory, samples and price
Available Distributors with stock: 0
Available Distributors with stock: 0
Equivalents and alternatives
The following DC/DC LED Buck driver are similar to MBI6661. Optional, compare MBI6661 side-by-side with other LED driver via the Comparison function.
Inductor suggestions
Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of MBI6661.
| Order Code | Spec | L (µH) | IR (A) | ISAT (A) | RDC (mΩ) | L x W x H (mm) |
| 74404054470 | 47.0 | 1.0 | 1.2 | 272.00 | 5 x 5 x 4 | |
| 74404063470 | 47.0 | 1.1 | 1.3 | 315.00 | 6 x 6 x 2.8 | |
| 74404064470 | 47.0 | 1.2 | 1.5 | 200.00 | 6 x 6 x 4.5 | |
| 74404084470 | 47.0 | 1.6 | 1.9 | 136.00 | 8 x 8 x 4.2 | |
| 744066470 | 47.0 | 1.8 | 1.9 | 121.00 | 10 x 10 x 4.1 | |
| 744071470 | 47.0 | 1.6 | 1.3 | 120.00 | 8 x 8 x 4.6 | |
| 74437349560 | 56.0 | 1.4 | 2.0 | 342.00 | 7.3 x 6.6 x 5 | |
| 744732470 | 47.0 | 1.8 | 1.9 | 114.00 | 9 x 9 x 8 | |
| 7447462470 | 47.0 | 1.2 | 1.2 | 220.00 | 5.5 x 5.5 x 8.5 | |
| 744771156 | 56.0 | 2.0 | 2.4 | 87.00 | 12 x 12 x 6 | |
| 7447713470 | 47.0 | 1.2 | 1.9 | 207.00 | 10 x 10 x 3 | |
| 7447714560 | 56.0 | 2.0 | 2.3 | 101.00 | 10 x 10 x 5 | |
| 7447715470 | 47.0 | 2.0 | 2.1 | 105.00 | 12 x 12 x 4.5 | |
| 744772560 | 56.0 | 2.0 | 2.4 | 109.50 | 7.8 x 7.8 x 10 | |
| 744775139 | 39.0 | 1.3 | 1.3 | 116.00 | 7 x 7.8 x 5.5 | |
| 744775147 | 47.0 | 1.2 | 1.2 | 134.30 | 7 x 7.8 x 5.5 | |
| 744776139 | 39.0 | 1.6 | 1.8 | 98.30 | 9 x 10 x 5.9 | |
| 744776147 | 47.0 | 1.5 | 1.6 | 95.10 | 9 x 10 x 5.9 | |
| 744776156 | 56.0 | 1.4 | 1.5 | 112.00 | 9 x 10 x 5.9 | |
| 744777139 | 39.0 | 1.1 | 1.2 | 145.00 | 7.3 x 7.3 x 4.5 | |
| 7447779139 | 39.0 | 1.1 | 1.2 | 145.00 | 7.3 x 7.3 x 4.5 | |
| 784775139 | 39.0 | 1.3 | 1.3 | 116.00 | 7 x 7.8 x 5.5 | |
| 784775147 | 47.0 | 1.2 | 1.2 | 134.00 | 7 x 7.8 x 5.5 | |
| 784776139 | 39.0 | 1.6 | 1.8 | 98.00 | 9 x 10 x 5.9 | |
| 784776147 | 47.0 | 1.5 | 1.6 | 95.00 | 9 x 10 x 5.9 | |
| 784776156 | 56.0 | 1.4 | 1.5 | 112.00 | 9 x 10 x 5.9 | |
| 784777470 | 47.0 | 1.2 | 1.3 | 250.00 | 7.3 x 7.3 x 4.3 |
