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Part Number: DRV110EVM
My settings are: JP1, JP2, JP3 closed , JP4 thru JP9 are open.
Potentiometer R4, R5, R6 Fully CCW, R3 fully CW.
12 VDC supply are connected to P1-1 and P1-3
Solenoid coil is connected to P1-2 & P1-4
I verified that the solenoid energizing when providing 12V to it directly.
Can someone help me please. TIA
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In reply to Tony Nguyen1:
In reply to James Lockridge19:
I don't think there is anything wrong with your connection. However, since you are using 12 V, you can try shorting JP6 and JP8 connectors to connect the 12-V supply directly to VIN.
The problem is likely that the EVM is not configured for the current you require. Magnetic force is dependent on current. If there is not enough current, the magnetic force will be too weak to overcome the spring force. The potentiometers and sense resistor need to be set for the currents you require.
From my calculations, to operate your solenoids, you may need to reduce the size of your sense resistor. For the 18-Ohm solenoid, you could probably use a 0.33-Ohm resistor. The 3.5-Ohm solenoid may need a 0.1-Ohm resistor.
The formulas are in the datasheet, but here is the link to an Excel calculator to help you determine the values:
In case that link doesn't work, try this:
DRV1xx Parameter Selector.zip
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