Texas Instruments: DRV8662EVM Evaluation Module for DRV8662 Piezo Haptic Driver

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Kit Overview

The DRV8662EVMDRV8662EVM Evaluation Module (EVM) is a fully-differential, high-voltage piezo actuator driver that provides quick response time for single layer and multi-layer piezo actuators.

The DRV8662DRV8662 drives piezo loads up to 200V differentially using an adjustable integrated boost converter. The evaluation module contains the DRV8662 piezo haptics driver, a programmable MSP430, and passive components for complete evaluation.

Operating Modes:

The DRV8662DRV8662 EVM has four operating modes and can accept a low-pass filtered PWM waveform or an analog signal to drive piezo loads. The DRV8662 input modes are described below:

MSP430 PWM input - in this mode the on-board MSP430 (U2) generates a PWM waveform which is sent through the low-pass input filter to the DRV8662.
External PWM input - an external source supplies a PWM waveform to the EXTIN header which is sent through the low-pass input filter to the DRV8662.
External analog input - an external source supplies an analog waveform (sine wave) to the EXTIN header. The low-pass input filter may be removed.
I2C input - an external source supplies an I2C stream which is decoded by the multiProductLinkMSP430 to produce a PWM output waveform. The PWM waveform is then sent through the low-pass input filter to the DRV8662. This option requires special firmware for decoding the I2C stream.

Key Applications: Mobile Phones, Tablets, Portable Computers, Keyboards and Mice, Touch Enabled Devices.

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Technical Documents

Learning Center

Type	Description
User Guide	TI: User Guide for DRV8662EVM Eval Module
Datasheet	TI: Data Sheet for DRV8662 - Piezo Haptic Driver with Integrated Boost Converter
Selection Guide	TI: Selection Guide for TI Solutions for Tablets and eBooks
Application Note	TI: Application Note for High-definition haptics: Feel the difference!

Design Elements

Type	Description
Simulation Model	TI: DRV8662 TINA-TI Spice Model
Application Library	TI: Source Code for DRV8662EVM

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Kit Features

DRV8662EVMDRV8662EVM Features:

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
Drives single-layer and multi-layer piezo actuators
Integrated Boost Converter
- Adjustable Boost Voltage
- Adjustable Current Limit
- Integrated Power FET and Diode
- No Transformer Required
Adjustable 200V Differential Output
A programmable MSP430 with sample waveforms
Directly connect external PWM and analog signals
Fast Start-up Time of 1.5ms
Wide Supply Voltage Range of 3.0V to 5.5V
1.8V Compatible Digital Pins
Thermal Protection
Available in a 4mm x 4mm x 0.9 mm QFN package (RGP)

Kit Contents

The Texas Instruments DRV8662EVMDRV8662EVM supplied with below contents:

DRV8662EVMDRV8662EVM DRV8662DRV8662 Evaluation Module