Part Number:DRV2667
Hi Team,
I have customer have interest in evaluating DRV2667, now we have some questions about spec.
It mention as below text, that there some limit of voltage and the capacitance and frequency. But I don't understand why there is limit and what's the exact relationship.
And another question is, I don't see the driver capability/current number, but only boost current limit mentioned.
Could you help explain more details above ?
Thanks a lot.
-----------------------------------------------
High-Voltage Piezo-Haptic Driver
– Drives up to 100 nF at 200 VPP and 300 Hz
– Drives up to 150 nF at 150 VPP and 300 Hz
– Drives up to 330 nF at 100 VPP and 300 Hz
– Drives up to 680 nF at 50 VPP and 300 Hz
– Differential Output
8.2.2.2 Piezo Actuator Selection
There are several key specifications to consider when choosing a piezo actuator for haptics, such as dimensions,
blocking force, and displacement. However, the key electrical specifications from the driver perspective are
voltage rating and capacitance.
At the maximum frequency of 500 Hz, the device is optimized to drive up to 50 nF at 200 VPP, that is the highest
voltage swing capability. It drives larger capacitances if the programmed boost voltage is lowered and/or the user
limits the input frequency range to lower frequencies (e.g. 300 Hz).
