A power supply voltage identification device and power supply

Abstract

The embodiments of the invention disclose a power voltage identification apparatus. The power voltage identification apparatus comprises an identification circuit and an unlatching circuit. The identification circuit is used for detecting the voltage of a power supply source, sending a first control signal to the unlatching circuit when the voltage belongs to a normal system work voltage scope and sending a second control signal to the unlatching circuit when the voltage is higher than or lower than the normal system work voltage scope. The unlatching circuit is used for unlatching a system power source when receiving the first control signal and shutting down the system power source when receiving the second control signal. The embodiments of the invention also provide a power source. By using the power voltage identification apparatus and the power source, provided by the embodiments of the invention, whether the voltage of the power supply source satisfies system requirements can be automatically identified, the versatility is quite high, and the equipment popularization and application are facilitated.

Description

technical field [0001] The invention relates to the field of power supplies, in particular to a power supply voltage identification device and a power supply. Background technique [0002] Many office and home devices can be powered by adapters. Common adapter specifications are 3.3V, 5V, 8V, 12V, 48V, etc. At present, most of the adapters on the market use the same type of output voltage interface, making it difficult to distinguish the specific specifications of the adapter from the appearance, that is, the output voltage of the adapter. Therefore, in the actual use of the existing adapters, it is inevitable that there will be confusion, resulting in the low-voltage output adapter being inserted into the high-voltage input device, or the high-voltage output adapter being inserted into the low-voltage input device, etc., causing the device to fail to power on or the device to be burned. , bringing extremely poor user experience and great loss to users. [0003] In the pr...

AI Technical Summary

Problems solved by technology

[0005] However, there are defects in the existing adapter power identification technology: firstly, the adapter needs to have a dedicated communication interface, which is not common; secondly, the system also needs to support this interface, which requires relatively high system performance

Therefore, the versatility of the prior art is relatively poor, which limits the popularization and use of the equipment

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