I've bought a Micropuck driver which I intended to use with 2 NiMH batteries and one LED. According to the application note the resulting input voltage range (from 2.8V when batteries are fresh down to 2V for almost depleted batteries) is OK as it allows the driver to operate with a frequency around 80% according to figure 3. So driving a white LED with this configuration looks perfect.
But I wonder if this "boost configuration" can be used to power a red LED (a Seoul Z-power R42182) whose Vf varies from 2.2V @350mA down to 2V @200mA. All this Vf range is lower than or equal to the input voltage, so we can't talk of a "boost configuration" here. Would this work all the same?
I noticed the buck/boost configuration on page 4 but it is less efficient.
But I wonder if this "boost configuration" can be used to power a red LED (a Seoul Z-power R42182) whose Vf varies from 2.2V @350mA down to 2V @200mA. All this Vf range is lower than or equal to the input voltage, so we can't talk of a "boost configuration" here. Would this work all the same?
I noticed the buck/boost configuration on page 4 but it is less efficient.
