#PIEZO ELECTRIC ACTUATORS DRIVERS#
#PIEZO ELECTRIC ACTUATORS DRIVER#
#PIEZO ELECTRIC ACTUATORS PORTABLE#

#PIEZO ELECTRIC ACTUATORS PORTABLE#

Combining sensing and driving in a single product allows for significant footprint reduction as only one product need to be used for both operations, making it the perfect fit for an all-in-one haptics solution for cellphones and other portable devices. It embeds an ADC for very accurate measurements, enabling complex applications such as touch velocity sensing.

#PIEZO ELECTRIC ACTUATORS DRIVER#

In addition to generating a high voltage in order to drive the piezoelectric actuator, the BOS1901 is currently the only driver that is also able to measure the differential voltage at both ends of the actuator. Therefore, these actuators can be used as sensors and they can provide feedback. They can also produce a voltage when the force applied on it is changed. Piezoelectric actuators subject to a voltage change will deform.

#PIEZO ELECTRIC ACTUATORS DRIVERS#

While driving a waveform, its consumption is about an order of magnitude less than ERMs, LRAs and other piezo drivers on the market.

The BOS1901 was designed to be as power-efficient as possible in the context of piezoelectric actuators, featuring energy recovery and minimizing all sources of power dissipation. Higher voltage drivers have long been associated with higher power consumption, which was true for the driver architecture available: a boost regulator supplying a high-voltage amplifier. In any battery-powered system consumption is critical and must be minimized. The selected driver must be able to reach the desired frequency and voltage for the actuator capacitance. This improvement comes at the price of a higher capacitance. Multilayer actuators can produce the same displacement while requiring less voltage. High-Voltage OutputĪ piezoelectric actuator requires high differential voltage applied to both ends in order to deform and generate a vibration. However, they cannot produce significant power output like the other options, so they are limited to smaller devices. They have good power efficiency, making them great for use in laptops, smartphones and devices running on batteries. Although many can be used in a single system, they still occupy significant physical space.Īnd then there are drivers as integrated circuits, offering the smallest footprint. Piezo driver modules are smaller and made to be integrated into systems. However, they are more geared toward laboratory testing, and they are limited to be used in products that are physically bigger. They may also offer more functionality and be easier to operate. Piezoelectric drivers come in various shapes and sizes, but they are all essentially high-voltage amplifiers.ĭrivers that come in bigger enclosures will offer higher voltage and higher output power. If sensing is required, a sensing circuit must be added. Note that most products can only drive the actuator and cannot sense its voltage when pressed. Most drivers have a single output channel and thus can only control one actuator. Piezoelectric drivers are devices with two main functions: generating a high voltage supply, and produce a time-variable voltage output corresponding to the expected displacement waveform on the actuator. Piezoelectric actuators require waveforms at high voltage to operate. This article defines what is a piezoelectric driver and what characteristics are best for haptics applications. There are many architectures, sizes and power output for a vast array of applications and not all piezo drivers use the same technology. Finding the right piezo driver can be a tedious task.

Piezo electric actuators