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DRV110EVM: solenoid not open/energized
Part Number: DRV110EVM
I am using a DRV110EVM board to energize a 24V solenoid to drive a spray nozzle.
-JP1, JP2, JP3 close, JP4-9 open
-Pot R4, R5, R6 fully CCW
-Pot R3 fully CW
-24 VDC supply connected to P1-1 and P1-3
-Solenoid coil connected to P1-2 & P1-4
Solenoid coil type: Burkert 10W 24V coil, 55 Ohms
I am trying to trigger the coil by applying 3-5V to TP3 (EN). I cannot get any solenoid activation. I also accidentally jumpered JP6 and caused fuse F2 to blow immediately. I will resolder a new one and try again. Any clues on what I am doing wrong?
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It looks like your board is configured correctly. Is the DRV110 part outputting anything? You can check the OUT pin with an oscilloscope to verify the part is functional. The OUT pin will either be high or PWM when the EN pin is high.
If the part is functional, it is possible that not enough current is driving the solenoid. The solenoid is rated for 24V and is 55Ohm, thus it can handle 436mA. The default peak current setting is 300mA with PEAK shorted to GND. In this case, I would set R_PEAK to 138kOhm to set the peak output current to 436mA.
If the part is not functional, verify the voltage at VIN is between 6V and 15V.
For the purposes of troubleshooting, you may leave the EN pin floating so it is automatically pulled high.
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