Can I Power a 12V/5A Device with a 13V/1.8A Power Supply?

The compatibility of a power supply with a device is a critical consideration in any electrical setup. When you have a 12V/5A device and a 13V/1.8A power supply, several factors need to be evaluated to determine if such a setup is viable. Let's break down the key points to understand the feasibility of powering the device.

Voltage Compatibility

The cornerstone of any power supply and device compatibility is voltage. A 12V device requires 12 volts to function correctly. Your power supply offers 13 volts, which is only slightly higher. According to the specifications, many devices can tolerate a minor overvoltage, such as 1 volt (

Current Requirements

A 12V/5A device necessitates 5 amperes to operate at full capacity. Conversely, your power supply provides only 1.8A. This discrepancy is significant and could lead to potential problems:

Inadequate Current: A current shortfall can cause the device to fail to function correctly, potentially leading to damage. Overheating: When a power supply is pushed beyond its limits to meet the device's current demands, it can overheat and fail.

Conclusion

Based on the above considerations, it would not be advisable to use a 13V/1.8A power supply to power a 12V/5A device. The current supply is insufficient, and the slight overvoltage could pose a risk to the device's integrity. It is best to use a power supply that matches both the voltage and current requirements of your device.

Additional Considerations

While some responses suggest that the device might run warmer due to the overvoltage, it is crucial to monitor the device's temperature during operation. If temperatures rise significantly, it's recommended to stop and switch to a more appropriate power supply.

Moreover, if the device is sensitive to voltage fluctuations, the overvoltage might not be as benign as suggested. Some devices might not regulate well and could experience input voltage variations as high as 20V or more. Therefore, it's essential to ensure that the power supply's output is indeed 13V with no additional variations.

Regarding the polarity, always verify that the power supply is connected correctly. If the polarity is reversed, the device will not only fail to function but might also be damaged.

In summary, while a 13V/1.8A power supply might be marginally acceptable in some cases, it is generally best to use a power supply that can fully meet both the voltage and current requirements of the device. This ensures optimal performance and avoids potential damage to the device and the power supply.