DRV2700
Piezo
Element
BST
OUT
>
OUT+
GND
DRV2700
BST
OUT
>
OUT+
GND
100 Vp
Piezo
Element
100 Vp
Piezo
Element
Piezo
Element
100 Vp
100 Vp
DRV2700
Piezo
Element
BST
OUT-
OUT+
GND
200 Vpp
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Output
19
SLOU403C – March 2015 – Revised June 2018
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Copyright © 2015–2018, Texas Instruments Incorporated
DRV2700EVM High Voltage Piezo Driver Evaluation Kit
6
Output
The DRV2700 has 3 main outputs and GND on the 4-terminal output:
1. The output of the boost converter (BST)
2. The positive output of the amplifier (OUT+)
3. The negative output of the amplifier (VOUT–)
These outputs can be configured in a variety of ways and are described in more detail in this section.
6.1
Two Terminal Differential Output Configuration (OUT+ – OUT–)
The typical output configuration is a 2 terminal differential output with one terminal connected to OUT+
and the other connected to OUT–. This configuration can achieve 200 Vpp.
Figure 14. Two Terminal Differential Output
6.2
Two Terminal Single Ended Output Configuration (OUT± to BST/GND)
This output configuration allows for 2 outputs that are 180 degrees out of phase. This is configured with
OUT+ and/or OUT– referenced to GND with a voltage that can swing up to 100 V. Additionally, they can
be referenced to BST.
Figure 15. Two Terminal Single Ended Output
