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 R EXT resistor. The boost converter architecture will not allow the demand on the supply current to exceed the limit set by the R EXT 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 driven.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | DRV8662 Piezo Haptic Driver with Integrated Boost Converter datasheet (Rev. C) | PDF | HTML | 18 Oct 2022 |
| Application note | DRV8662, DRV2700, DRV2665, and DRV2667 Configuration Guide (Rev. A) | PDF | HTML | 08 Dec 2021 | |
| EVM User's guide | DRV8662 Piezo Haptics Driver Evaluation Module (RevD Silicon) (Rev. B) | 09 Mar 2016 | ||
| Product overview | Automotive Haptics Solutions | 16 Sep 2013 | ||
| Analog Design Journal | High-definition haptics: Feel the difference! | 17 Jul 2012 |
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