Transcription of Components and Methods for Current Measurement
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Components and Methods for Current Measurement
VISHAY DALEP ower Metal Strip ResistorsTechnical NoteComponents and Methods for Current Revision: 31-Aug-151 Document Number: 30304 For technical questions, contact: DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENTARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT NOTEBy Bryan YarboroughPURPOSEC urrent sensing is used to perform two essential circuit functions. First, it is used to measure how much Current is flowing in a circuit, which may be used for power management in a DC/DC power supply to determine essential peripheral loads to conserve power.
Depending on the transistor product, the accuracy tolerance range can vary from as low as 5 % to as wide as 15 % or 20 %. This is generally not suitable for current control applications that typically require 1 % measurement accuracy, but is intended for overcurrent and short circuit protection. Fig. 7 4. Resistor Technology Options
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