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Contents
1
Getting Started
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6
1.1
Evaluation Module Operating Parameters
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6
1.2
Quick Start Board Setup
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7
1.3
Connecting a Load
..................................................................................................
7
2
Overview of EVM
............................................................................................................
8
2.1
DRV2700
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8
2.2
Microcontroller (MSP430)
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8
2.3
Power Supply Inputs and Path
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8
2.4
EN Configuration
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9
2.5
Inputs
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9
2.6
Outputs
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9
2.7
TRIG Button
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9
3
EVM Control Software (GUI)
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10
4
Flyback Converter
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12
4.1
Programming the HV Maximum Output Voltage
..............................................................
13
4.2
Programming the Flyback Current Limit
........................................................................
14
4.3
Transformer Selection
............................................................................................
14
4.4
HV Capacitor Selection
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14
5
PWM and Analog Inputs
..................................................................................................
15
5.1
PWM Input Using MSP430
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15
5.2
Analog Input
.......................................................................................................
16
6
Output
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17
6.1
Load Selection
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17
6.2
Pulldown Network
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17
7
Input Filter
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19
7.1
First Order Filter
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19
7.2
Integrator
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19
8
Reference
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20
8.1
Schematic
..........................................................................................................
20
8.2
PCB Layout
........................................................................................................
21
8.3
Bill of Materials
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22
List of Figures
1
Board Diagram
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6
2
Power Path Diagram
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8
3
Output Diagram
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9
4
GUI Interface
................................................................................................................
10
5
Low PWM Frequency
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11
6
Mid PWM Frequency
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11
7
High PWM Frequency
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11
8
Arbitrary Waveform Using Wavebuilder Tab
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11
9
V
HV
Feedback Network
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13
10
PWM Signal
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15
11
10-Hz Input Signal
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16
12
100-Hz Input Signal
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16
13
Instantaneous Max Load Current vs Max Output Voltage
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17
14
Pulldown Network
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18
15
With FET Pulldown
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18
16
Without FET Pulldown
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18
17
Input Filter
...................................................................................................................
19
18
DRV2700EVM-HV500 Schematic
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20
2
DRV2700EVM-HV500 High Voltage Piezo Driver Evaluation Kit
SLOU407A – April 2015 – Revised May 2015
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