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Part Number: DRV8840EVM When starting the DRV88xx EVM software, there is an error for missing Labview run-time engine. I have installed the engine an still get the error.
Part Number: DRV8840EVM Other Parts Discussed in Thread: DRV8840 Hi,
I am trying to evaluate DRV8840EVM, but it does not work.
I set up the USB connection and GUI software but the USB communication is not available.
MSP430 status LED does not blink, and…
Other Parts Discussed in Thread: DRV8840EVM , DRV8840 DRV8840EVM was working but now is not. CPG004-5 software connects over COM4 but status box stays red and does not turn green. How can I troubleshoot this? MSP430 status LED continues to flash once a…
Hi Nakai-san,
This is common with brushed DC motors.
What is the voltage overshoot seen at the ISEN pin?
Adding a ferrite bead or inductor between the OUTPUTs and motor can help reduce the current level.
The DRV8840EVM has a 0.1uF in parallel with the…
Hi Martin,
Both toggling nRESET and nSLEEP cleared the OCP event on the DRV8840EVM.
To create the event, OUT1 and OUT2 were shorted. The outputs were disabled and the ENBL pin was set to a logic low. The short was removed. Then nRESET or nSLEEP was toggled…
Hi Gavin,
There should be a large bulk capacitor on the board. Please see the DRV8840EVM as an example. The EVM has a 100uF capacitor (C7) used for bulk. Also there is a 0.1uF capacitor placed at each VM pin.
Hi Suyog,
The DRV8801 will work, but it may be at the limit of operation. The overcurrent threshold is 3A. Two in parallel may be required.
The DRV8840 at 5A with overcurrent threshold of 6A may be a better fit.
A DRV8840EVM is available for evaluation…
Hi Patrick,
So it sounds like you may have both issues. Let's first concentrate on the toggling nFAULTs. 3 to 3.5A current about where overtemp can occur.
Are the thermal vias 24mils in diameter? This is twice the recommended diameter from the datasheet…
Bohdan,
I suggest taking a look at the DRV8840 or DRV8842 kits with the links below. You can purchase the kits or you can also just download the MSP430 code from the tool folder. Both use a MSP430F1612, but code should port.
http://www.ti.com/tool/dr…
