VDD
DRV2667
IN+
GND
OUT+
OUT-
MSP430
PWM
SDA
SCL
SDA
SCL
C6
Analog
R6, 0
Q
R7, NP
SDA SCL
IN-
C7
Hardware Configuration
There is also a special mode in the Design & Test set that allows you to save the DRV2667’s sequencer
registers settings for playback at a later time. To store the sequencer:
1. Enter Design & Test Modes. Select Mode 0 – GUI Mode (00000’b) using the increment mode button
(“+”).
2. Press the B1 button to enter storage mode. (The mode LEDs will all turn on.)
3. Press the B2 or B3 button to save the current sequencer to the respective button.
4. Press the B1 button again to exit storage mode. (The mode LEDs will all turn off.)
5. Press either the B2 or B3 button to reload the DRV2667 sequencer with the saved sequence and play.
3.5
Analog/PWM Input
is an illustration of the external analog and PWM input.
Figure 24. External Analog/PWM Input
The DRV2667EVM-CT accepts analog or PWM inputs for the analog IN+/IN- pins of the DRV2667. To use
the IN+/IN- pins of the DRV2667 follow the instructions below:
1. Enter Design & Test Modes. Select Mode 7 (00111’b) using the increment mode button (“+”).
2. Select the gain and voltage using buttons B1–B4:
•
B1 – 28.8 dB, 50 Vpp
•
B2 – 34.8 dB, 100 Vpp
•
B3 – 38.4 dB, 150 Vpp
•
B4 – 40.7 dB, 200 Vpp
3. Turn on the signal source to begin output.
3.6
Programming the Boost Converter
The integrated boost converter provides the necessary voltage to drive 200 Vpp. The boost converter is
applied differentially across the load to achieve output voltage of two times the boost voltage. The
DRV2667 maximum output voltage should be adjusted so that it does not exceed the maximum rated
voltage of the load. This not only prevents damage to the load, but also helps improve efficiency. To
adjust the output voltage, adjust the boost converter voltage and DRV2667 internal gain settings using the
instructions in
to
19
SLOU323 – June 2013
DRV2667 Evaluation Module
Copyright © 2013, Texas Instruments Incorporated