Fixed OFF Time Control Circuit Diagram using LMD18200

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Using the current sensing feature of the LMD18200, the following circuit diagram appears a conventional analog control scheme called “Fixed Off Time Control”.

lmd18200 application circuit diagram

This circuit application is an example of Sign/Magnitude control.  Whenever the motor current exceeds the desired set level a one shot is triggered which turns on the two upper switches of the H-Bridge, shorting out the motor for a fixed time interval. By driving the direction input of the LMD18200, the motor can be reversed.

Or you may require to see the LMD18200 datasheet for complete details (source: national.com)

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This entry was posted on Tuesday, April 27th, 2010 at 12:03 am and is filed under Current Sensing. You can follow any responses to this entry through the RSS 2.0 feed. You can skip to the end and leave a response. Pinging is currently not allowed.

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