Author Topic: Design of two drivers for a DV-S9 type diving flashlight OSHW  (Read 4029 times)

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Offline luicerTopic starter

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  • Country: es
Hello everyone,

I want to share with you the design of two drivers for a DV-S9 type diving flashlight. The complete design documentation can be found on my blog:

The first driver is of the linear type and supports a current of up to 3A with an efficiency of up to 70% at maximum supply voltage (4.2V), the second driver is switching type and supports up to 1A with an efficiency independent of the supply voltage of 85%.

The PCB has been designed for the aluminum housing of the flashlight and is easily interchangeable.

The measured efficiency for the linear driver as a function of the supply voltage is as follows:

The measured efficiency for the switching driver is as follows:

If you have any comments, let's discuss them.

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