telecommunication equipment power measurement circuit

Published:2011/6/23 9:52:00 Author:Nancy | Keyword: telecommunication equipment, power measurement | From:SeekIC

This article discusses how to measure the input voltage and current of telecommunication equipment which adopts two independent inputs (-48V(A) and -48V(B)). Each independent input voltage range is not norrow than -42.5V～-56.5V, and OR operation is used on the module for this two independent inputs with the consideration of redundance.From the point of maintenance and support, it is very important to measuring the input voltage, the power of the module and wether the input exsits. Figure 1 is the simplified front end of the common power supply part of the telecommunication equipment. The OR operation of the two inputs is made by D1 and D2. Once the voltage through OR operation is higher than low-voltage threshold determined by R1 and R2, hot plug circuit (U1) add the electricity gradually for the load (data processing).



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