RS-422 Drivers Calculating the Power Dissipation

PublishTime：2020-11-26

This tech brief explains how to calculate the power dissipation of an RS-422 driver under a load condition. Figure 1 shows the simplified system block diagram together with the associated system parameters.
The total power dissipation is determined by calculating the individual power components for DC and AC under a no-load condition, followed by the calculations for the internal power consumption of the driver when only driving RD, and when only driving CD. The sum of these power components yields the total power dissipation of the driver.

Brand of Product：	Renesas
Part#：
Product Category：	Drivers More
Application：	More
Data Type：	Application note & Design Guide More
Safety & Environment Standards：	More
Operating Temperature：	Please see the document for details
Qualification Grade：	More
Qualification Approval：	More
Package：
Language：	English Chinese Chinese and English Japanese
Date of Creation：	Mar.24.20
Version Number：	Rev.1.00
Data Encoding：	R15ZZ0001EU0100
Data Size：	232 KB

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