Other Parts Discussed in Thread: DRV2700,
Hello,
The application at our hands requires driving a piezo stack as a linear actuator that has 1uF capacitance with pulses up to a maximum of 75 volts in a unipolar fashion.
I am planning to drive it through one of these driving ICs (DRV8662 or DRV2700), which in turn is driven by the digital output of a microcontroller with the least amount of interfacing components between the two.
Moreover, the input and output signals should look exactly like those depicted in "Figure 15. Output Slew Rate" of the DRV2700 datasheet (SLOS861B –MARCH 2015–REVISED APRIL 2015), where the required operational frequency is going to be around 1 Hz.
The application "DC-Coupled Reference Input Application", depicted in Figure 35 of the same datasheet seems appealing because of its simplicity, where the microcontroller's DO shall serve as Vref. Therefore, since the colleague that preceded me has already acquired several DRV8662 ICs, I was wondering if DRV8662 can be driven in the same fashion as DRV2700, in particular in the manner depicted in Figure 35. Furthermore, if that is the case, and this application moves forward towards production, would there be any drawbacks from utilizing DRV8662 instead of DRV2700. A related thread said that the latter is screened for industrial application, I am not quite sure what that entails, but if the system at hand is being considered for a medical implant, what are your thoughts in this regard, and is one chip more appropriate than the other?
Many thanks in advance.
Mothanna
