Texas Instruments DRV8662EVM - DRV8662 Evaluation Module DRV8662EVM DRV8662EVM 데이터 시트
제품 코드
DRV8662EVM
Introduction
1
Introduction
The DRV8662EVM is a fully-differential, high-voltage piezo actuator driver that provides quick response
times for single layer and multi-layer piezo actuators. The DRV8662 drives piezo loads up to 200 V
differentially using an adjustable 100-V integrated boost converter. The evaluation module contains the
DRV8662RGP piezo haptics driver, an
times for single layer and multi-layer piezo actuators. The DRV8662 drives piezo loads up to 200 V
differentially using an adjustable 100-V integrated boost converter. The evaluation module contains the
DRV8662RGP piezo haptics driver, an
, and passive components for complete
evaluation. This document contains the EVM schematic, printed circuit board (PCB) images, and a
complete bill of materials (BOM) as well as instructions for operating the EVM.
complete bill of materials (BOM) as well as instructions for operating the EVM.
1.1
DRV8662RGP EVM Operating Specifications
lists the EVM operating parameters at room temperature. See the
for a comprehensive list of operating parameters and descriptions.
Table 1. EVM Operating Specifications
Parameter
Specification
Supply voltage range, V
BAT
3 V to 5.5 V
Power-supply current rating
1 A
required
Input voltage, V
I
0 V to 3.3 V
Maximum output voltage, V
OUT
200 V
WARNING
Care should be taken while handling and evaluating this module
because of high voltages (up to 200 V).
because of high voltages (up to 200 V).
2
Quick Start for Stand-Alone Operation
This section helps you get started quickly by describing the default setup of the DRV8662EVM. The EVM,
by default, generates sample haptic waveforms using an onboard MSP430. During operation, the MSP430
outputs a PWM waveform on the PWM+ and PWM– traces that are connected to the DRV8662 low-pass
input filter. The low-pass filtered signals are then input to the DRV8662. The DRV8662 output appears on
the output terminal block (OUT) which can be connected directly to a high-voltage piezo load. The
pushbutton (TRIG) triggers various software events on the MSP430. When pressed, the button alternates
between the four DRV8662 gain settings, four sample haptic waveforms, and analog input modes. The list
of output waveforms can be found in
by default, generates sample haptic waveforms using an onboard MSP430. During operation, the MSP430
outputs a PWM waveform on the PWM+ and PWM– traces that are connected to the DRV8662 low-pass
input filter. The low-pass filtered signals are then input to the DRV8662. The DRV8662 output appears on
the output terminal block (OUT) which can be connected directly to a high-voltage piezo load. The
pushbutton (TRIG) triggers various software events on the MSP430. When pressed, the button alternates
between the four DRV8662 gain settings, four sample haptic waveforms, and analog input modes. The list
of output waveforms can be found in
To set up the EVM using the default configuration, follow the instructions presented below.
2.1
Powering the Board
1. Set the voltage of an external power supply to 3.6 V to 5.5 V.
2. With the power supply off, attach the ground connection of the power supply to the negative terminal of
the VBAT terminal block (VBAT–) and connect the positive supply to the positive terminal of the VBAT
terminal block (VBAT+).
terminal block (VBAT+).
3. Ensure the terminals are connected correctly, then enable the supply.
4. If the power is connected correctly the ACTIVE LED will blink.
3
SLOU319A – August 2011 – Revised December 2012
DRV8662 Piezo Haptics Driver Evaluation Module
Copyright © 2011–2012, Texas Instruments Incorporated