transformer How can I get 17 VDC from 25 VDC with current may up to 10 A

Connect the 25VAC output to a diode bridge with a capacitor (3300uF - 25V) to the positive and negative pins to eventually obtain 25VDC. The goal is to reduce the 25VDC to 17VDC. A voltage divider with a variable resistor was considered for this purpose, but it appears that the 10A current damaged the resistor.

To convert 25VAC to 17VDC, a suitable approach involves using a diode bridge rectifier followed by a smoothing capacitor. The diode bridge consists of four diodes arranged in a bridge configuration, allowing for full-wave rectification of the AC input. The capacitor (3300uF - 25V) serves to smooth out the rectified voltage, reducing ripple and providing a more stable DC output.

To achieve the desired output voltage of 17VDC from the 25VDC, a more robust voltage regulation method is recommended rather than a simple voltage divider, especially given the high current of 10A. A linear voltage regulator or a switching regulator would be more appropriate for this application. For instance, a linear regulator such as the LM317 can be employed, configured to output 17V by adjusting the resistor values according to the formula provided in the datasheet.

Alternatively, a buck converter could be utilized, which is more efficient for high current applications. This method steps down the voltage while maintaining high efficiency, thus avoiding the overheating issues associated with resistive voltage dividers. Proper heat sinking and thermal management should also be considered when implementing these components to ensure reliable operation under load.

In summary, transitioning from 25VDC to 17VDC in a high-current application necessitates the use of a more robust voltage regulation technique, such as a linear regulator or a buck converter, rather than a voltage divider, which is prone to failure under significant load conditions.Connect the 25VAC output to diodes bridge with capacitor (3300uF - 25v) to the positive and negative pins to eventually get 25VDC. What I want is to reduce the 25VDC to 17VDC, I thought i could build voltage divider with variable resistor to get the volt I want, but it looks like the passed 10amp damaged the resistor.

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