Giannis_TDM
Well-known member
- Joined
- Apr 27, 2019
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Hi LPF, So I was noticing that we have lost a lot of our old drivers so I wanted to give back to the community by designing cheap reliable, and no compromise drivers for us. My first design which I have tested with oscilloscopes tests coming in the following weeks from Zenodilodon Is a fixed current 0-3A set Buck driver with a with of 9mm and length of 16mm. To ensure that my design works I have done a test run of the design using the SO-8 Version of the ic which can be hand soldered. The production driver will have the 4mm x 4mm QFN version of the IC, Which is no different that the current SO-8 Version in terms of function.
A full list of the 3A buck driver specs and features with pictures can be seen below:
Output current: 0-3A fixed
Operating input voltage range: 3-18v
Minimum voltage difference between output and input: 100mv AKA to power a 4.7v VF LD you need to provide the driver with 4.8v
Topology: Buck
Typical efficiency: 92% and up.
Features: PWM dimming, Synchronous rectification, Reverse polarity protection, Overcurrent protection, Output short circuit protection, Soft start
Note: test pcbs are hand soldered and not to be sold.
The inductor is made from Panasonic, Caps from Samsung, and main ic from STMicroelectronics.
The calculation for output current is as follows Rs= 100mv / Rsense.
Here is it running a NUMB05 at 3A:
A full list of the 3A buck driver specs and features with pictures can be seen below:
Output current: 0-3A fixed
Operating input voltage range: 3-18v
Minimum voltage difference between output and input: 100mv AKA to power a 4.7v VF LD you need to provide the driver with 4.8v
Topology: Buck
Typical efficiency: 92% and up.
Features: PWM dimming, Synchronous rectification, Reverse polarity protection, Overcurrent protection, Output short circuit protection, Soft start
Note: test pcbs are hand soldered and not to be sold.
The inductor is made from Panasonic, Caps from Samsung, and main ic from STMicroelectronics.
The calculation for output current is as follows Rs= 100mv / Rsense.
Here is it running a NUMB05 at 3A:
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