Involvement:Expert (understands the inner workings) - Ownership:more than 1 month
This driver is pumping out 1.1A on high, so it's good for maximizing the brightness of single die LED's like the P4 and XRE/XPG. I am using it with 4AA, and the regulation is ruler flat from 6V to 4V. Cheep cheep driver... under $3... gotta love that. Be careful which SKU you order. There are four versions of this driver, the only difference is the UI: 3 or 5 modes, with and without memory. Choice is always good. I prefer drivers with only a few modes, and no memory, so I really want to like this driver but...
The measured efficiency is only 80%. This is pretty low for a buck regulator. The Zetex based driver (sku.3256) is 95% efficient, however it is only one mode. The only other multi-mode driver suitable for 4 to 6 AA is sku.7425, and that only pumps out 800ma and is only slightly more efficient at 85%. For comparison, a linear mode driver which simply burns off excess voltage as heat (e.g. AMC7135 based sku.6190) will average about 75% efficiency with 4 NIMH AA's (drops 4.8V to 3.6V at 1A)
I separated the two boards and the main IC is marked "LEDA 0712". Switching is handled by a separate N-FET marked "A06". The sense resistor is 0.25 ohms. The inductor is marked "100" - I believe that means 10uH.
Overall it's a good driver. Get a few for your 4-6 NiMH or 2 Li-ion powered projects.
Note:Stock and Availability shown on this site is for your reference only. While
we strive to provide the most accurate and timely stock and availability information,
availability information may become out of date and may change between the time
you added an item to cart and the time your order is received.
Quantities on clearance items are limited. Prices are current at time of posting. DX Reserves the right to change prices at any time without notice.