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Designation on chip, may be a fake, LM358-4AA-P1VMG3. I have a device using this chip that failed within hours of being placed into service. The device is used to control a DC motor, brushless, with 24 VDC input varied from zero to 24 volts to control speed of motor. i have not been able to find a chip with these markings so a suggestion on a substitute would be great.
Thank you for the response Ron. Yes one failure.
The chip is designated in three lines:
LM358 no other letters or numbers on this line
4AA no other letters or numbers on this line
P1VMG3 no other letters or numbers on this line.
I can send a picture if it would help. I believe it is a new design since this product only became available late last year. However it could very well be a counterfeit chip. The product is designed and produced in China by a Chinese company. I would rather use a genuine TI chip to replace the faulty one so if you can recommend a substitute I would appreciate it.
The device takes a 24 VDC supply splits into two outputs. These outputs are then controlled by a 0-10 VDC control signal to vary motor speed from 0 to 100% output. The motor typically runs directly off the 24 VDC power supply.
The part of the board that is not pictured is simply the remaing connection for the second output.
