The DRV8662 is a single-chip piezo haptic driver with integrated 105 V boost switch,
integrated power diode, and integrated fully-differential amplifier. This versatile device is
capable of driving both high-voltage and low-voltage piezo haptic actuators. The input signal can
be either differential or single-ended. The DRV8662 supports four GPIO-controlled gains: 28.8 dB,
34.8 dB, 38.4 dB, and 40.7 dB.
The boost voltage is set using two external resistors, and the boost current limit is
programmable via the REXT resistor. The boost converter architecture will
not allow the demand on the supply current to exceed the limit set by the
REXT resistor; therefore, the DRV8662 is well-suited for portable
applications. This feature also allows the user to optimize the DRV8662 circuit for a given
inductor based on the desired performance requirements.
A typical start-up time of 1.5 ms makes the DRV8662 an ideal piezo driver for fast haptic
responses. Thermal overload protection prevents the device from being damaged when over
View datasheet View product folder