The core of this white LED driver consists of a step-up converter with current output, which provides an output voltage of typically 3.6 V for white LEDs. The input voltage can be as low as 0.9V, thus allowing a. single cell battery operation.
For operation of up three LEDs is only one external component needed, which is an inductor. It is recommended to use an inductor value of 22 µH for a maximum battery lifetime ( more than 55 hours with an AA alkaline battery). With a 10 µH coil higher currents can be reached for maximum brightness of the white LEDs.
| PREMA Semiconductor GmbH | |
|---|---|
| Product Category | Application Specific Integrated Circuits (ASIC) |
| Product Number | PR4402 |
| Product Name | LED Driver |
