Other Parts Discussed in Thread: LM36010,
Tool/software:
We are working on a slave flash design in which a photodiode will detect a main flash and send a signal to a mcu which will then activate our LED flash. I have been researching different LED drivers and have found the TPS61165 as well as the LM36010 which is a specific flash driver. The LED choices we are considering are as follows:
1. Vf = 11.8V, I_f = 700mA
2. Vf = 5.77V, I_f = 400mA
3. Vf = 2.8V, I_f = 700mA (x2 in series)
4. Vf = 3.2V, I_f = 350mA (x2 in series)
The power source for the system is to be a 3.7V lithium ion/lithium polymer battery.
Given these parameters, we would need a boost topology in every case and given that the LM36010 is specifically designed for flash applications it would be nice, however its indicated max output voltage is 5.5V so if my understanding of the part is correct it would not work.
This led me to find the TPS61165 which seems like it would work given these parameters. However given the flash application I would like the fastest possible driver so that the LED is illuminated as fast as possible.
My questions:
- Is my understanding of the LM36010 correct and thus would not work for this application given the LED choices?
- Would the TPS61165 work for all of these LED choices? Are there any potential design concerns or considerations here?
- Are there better suggested parts for this application given these design parameters?
UPDATE 7/11/25:
Here is my current design with selectable jumpers to choose which LED is being tested.
Thanks!
