Hi everyone,
I have built a circuit for a flashlight that can be used with any common size/amount of batteries. (1xAA, 2xAA, 3xAA, 1xAAA ...etc)
The Buck/Booster circuit has an input voltage from 0.8V-5.5V and gives a constant output of 3.3V.
For the IC I am using the TPS61201 and for the LED I am using a Lumiled 5630 4000K.
My Problem:
I have tested this circuit on a breadboard, but never noticed that the LED gets really hot.
I have several ideas what to change, but not sure if any of these would work out:
- Change the resistor of the LED (probably would get very dimmed)
- Design a copper surface on the PCB around the LED. Like a heatsink. (Not sure if this small scale would be enough. PCB 16mmx16mm)
- Integrate some kind of current regulator. (Maybe the LED is getting too much current?)
Any help or advice is greatly appreciated! Here is the Schematic and my PCB attached.
Regards
Alex
I have built a circuit for a flashlight that can be used with any common size/amount of batteries. (1xAA, 2xAA, 3xAA, 1xAAA ...etc)
The Buck/Booster circuit has an input voltage from 0.8V-5.5V and gives a constant output of 3.3V.
For the IC I am using the TPS61201 and for the LED I am using a Lumiled 5630 4000K.
My Problem:
I have tested this circuit on a breadboard, but never noticed that the LED gets really hot.
I have several ideas what to change, but not sure if any of these would work out:
- Change the resistor of the LED (probably would get very dimmed)
- Design a copper surface on the PCB around the LED. Like a heatsink. (Not sure if this small scale would be enough. PCB 16mmx16mm)
- Integrate some kind of current regulator. (Maybe the LED is getting too much current?)
Any help or advice is greatly appreciated! Here is the Schematic and my PCB attached.
Regards
Alex