PiezoDrive PD200 User manual

PD200 V6 Manual 1 Rev 1.2, Released, 05-02-2018
PD200 –Power Amplifier
Version 6
Manual and Specifications

PD200 V6 Manual 2 Rev 1.2, Released, 05-02-2018
Contents
1Introduction ...............................................................................................................................................3
2Warnings / Notes .......................................................................................................................................3
3Specifications .............................................................................................................................................4
4Output Voltage Range................................................................................................................................5
5Output Current...........................................................................................................................................5
6Voltage Limits.............................................................................................................................................5
7Pulse Current Option .................................................................................................................................6
8Power Bandwidth.......................................................................................................................................7
9Small Signal Bandwidth..............................................................................................................................9
10 Noise ........................................................................................................................................................10
11 Front Panel...............................................................................................................................................11
12 Rear Panel ................................................................................................................................................12
13 Amplifier Configuration ...........................................................................................................................13
14 Bridged Mode ..........................................................................................................................................14
15 Overload and Shutdown ..........................................................................................................................15
16 Output Connections.................................................................................................................................15
16.1 HV Output Screw Terminals ..........................................................................................................15
16.2 LEMO OB Cable Assembly .............................................................................................................16
17 Enclosure..................................................................................................................................................17
18 Warranty ..................................................................................................................................................17

PD200 V6 Manual 3 Rev 1.2, Released, 05-02-2018
1Introduction
The PD200 is a high bandwidth, low noise linear amplifier for driving piezoelectric actuators. The output
voltage range can be unipolar, bipolar, or asymmetric from 50V to 200V. Up to +/-200V can be achieved in
the bridged configuration. The PD200 can drive any load impedance including unlimited capacitive loads
such as stack actuators; standard piezoelectric actuators; two wire benders; and three-wire piezoelectric
benders requiring a bias voltage.
Configuration options include the voltage range, polarity, and output current. The voltage range can also
be limited by two user-accessible potentiometers. The PD200 is suited to a wide range of applications
including electro-optics, ultrasound, vibration control, nanopositioning systems, and piezoelectric motors.
There are four output connectors including Lemo 00, Lemo 0B, BNC, and screw terminals that allow the
direct connection to almost any commercially available piezoelectric actuator. A rear-panel connector also
provides a temperature output, overload monitor, and external shutdown input.
Compatible Actuators
Stack Actuators
50V to 200V
Plates and Tubes
up to +/-100V
Two Wire Benders
up to +/-100V
Three Wire Benders
0 to 200V with 200V bias
Three Wire Benders
+/-100V with +/-100V bias
2Warnings / Notes
This device produces hazardous potentials and requires suitably qualified
personnel with an observer trained in first-aid training. Do not operate the
device when there are exposed conductors.

PD200 V6 Manual 4 Rev 1.2, Released, 05-02-2018
3Specifications
Electrical Specifications
Output Voltage Range
100 Vp-p
150 Vp-p
200 Vp-p
RMS Current
1.2 A
0.91 A
0.57 A
Pulse Current
10.0 A
10.0 A
10.0 A
Power Bandwidth
470 kHz
310 kHz
230 kHz
Gain
20 V/V
Slew Rate
150 V/us
Signal Bandwidth
680 kHz
Max Power
60 W Dissipation
Load
Any
Noise
714 uV RMS (10uF Load, 0.03 Hz to 1 MHz)
Protection
Continuous short-circuit, thermal
Voltage Monitor
1/20 V/V (BNC)
Current Monitor
1 V/A (BNC)
Analog Input
+/-10V (BNC, Zin = 27k)
Output Connectors
LEMO 0B, LEMO 00, Screw Terminals, BNC
Power Supply
90 Vac to 250 Vac
Mechanical Specifications
Environment
0-40 C (32-104 F) Non-condensing humidity
Dimensions
275 x 141 x 64 mm (10.8 x 5.5 x 2.5 in)
Weight
1 kg (2.2 lb)

PD200 V6 Manual 5 Rev 1.2, Released, 05-02-2018
4Output Voltage Range
The desired output voltage range is specified when ordering. The default output range is
0V to +200V (PD200-V0,200). The available voltage ranges and associated current limits are listed below.
Voltage Range
RMS Current
Peak Current
Order Code
0 to +200
0.57 A
2 A
PD200-V0,200
0 to +150
0.91 A
2 A
PD200-V0,150
0 to +100
1.20 A
2 A
PD200-V0,100
0 to +50
1.20 A
2 A
PD200-V0,50
-50 to +150
0.57 A
2 A
PD200-V50,150
-50 to +100
0.91 A
2 A
PD200-V50,100
-50 to +50
1.20 A
2 A
PD200-V50,50
-100 to +100
0.57 A
2 A
PD200-V100,100
-100 to +50
0.91 A
2 A
PD200-V100,50
Table 1. Voltage range configurations
5Output Current
The PD200 has a peak and average current limit as described in Table 1. The RMS current limit defines the
maximum frequency that is achievable with a capacitive load. This topic is discussed in “Power Bandwidth”.
During short-circuit the output current is limited to the rated maximum. The peak current can be drawn for
up to five milliseconds before the output is disabled for three seconds. The average current limit has a
time-constant of 30 milliseconds and is reset 100 milliseconds after a previous current pulse. This
behaviour is described in “Overload and Shutdown”.
6Voltage Limits
The output voltage range can be restricted to an arbitrary positive and negative value using two
potentiometers accessed from a pair of holes on the bottom panel. By gently turning the potentiometers
clockwise with a 2-mm flat-head screwdriver, the full voltage range becomes available. The voltage range is
reduced by turning the potentiometers anti-clockwise. The hole closest to the front panel controls the
negative voltage range while the rear hole controls the positive range.

PD200 V6 Manual 6 Rev 1.2, Released, 05-02-2018
7Pulse Current Option
For applications that require a high peak current, the peak current limit can be increased to 10 Amps by
appending the order code with “-PULSE”, e.g. “PD200-V0,200-PULSE”. In this configuration, the average
current limit remains the same; however, the peak current limit is increased to 8 Amps and the maximum
pulse duration is reduced to the time listed in Table 2. The voltage span is the peak-to-peak output voltage
range, e.g. the voltage span for the -50V to +150V range is 200V.
Voltage Span
Pulse Current
Pulse Time
200 V
10 A
100 us
150 V
10 A
150 us
100 V
10 A
400 us
50 V
10 A
400 us
Table 2. Maximum peak current duration in the pulse configuration
For a current pulse less than the peak current limit, the increased duration is described in Figure 1.
Figure 1. Maximum pulse duration versus peak current and voltage span

PD200 V6 Manual 7 Rev 1.2, Released, 05-02-2018
8Power Bandwidth
Launch Online Power Bandwidth Calculator
The online power bandwidth calculator takes into account the current limit, slew-rate,
output impedance, and small-signal bandwidth.
With a capacitive load, the RMS current for a sine-wave is
 


where 
 is the peak-to-peak output voltage, is the load capacitance and is the frequency. Therefore
the maximum frequency for a given RMS current limit 󰇛󰇜capacitance, and voltage is

 

 
The above equation is also true for any periodic waveform, including triangle waves and square waves. This
property arises since the amplifier detects average current, which not affected by the waveform shape.
The ‘power bandwidth’ is the maximum frequency at full output voltage. When the amplifier output is
open-circuit, the power bandwidth is limited by the slew-rate; however, with a capacitive load, the
maximum frequency is limited by the RMS current and load capacitance. The power bandwidth for a range
of capacitive loads is listed below.
Load Capacitance
50V Range
100V Range
150V Range
200V Range
No Load
520 kHz**
470 kHz*
310 kHz*
230 kHz*
10 nF
520 kHz**
470 kHz*
270 kHz
130 kHz
30 nF
370 kHz
180 kHz
91 kHz
43 kHz
100 nF
110 kHz
56 kHz
27 kHz
13 kHz
300 nF
37 kHz
18 kHz
9.1 kHz
4.3 kHz
1 uF
11 KHz
5.6 kHz
2.7 kHz
1.3 kHz
3 uF
3.7 kHz
1.8 kHz
910 Hz
430 Hz
10 uF
1.1 kHz
560 Hz
270 Hz
130 Hz
Table 3. Power bandwidth versus load capacitance and output voltage span
In the above table, the frequencies limited by slew-rate are marked with an asterisk, and the frequencies
limited by small-signal bandwidth are marked with a double asterisk. The slew-rate is approximately
150 V/uS which implies a maximum frequency of
  


In the following figures, the maximum peak-to-peak voltage is plotted against frequency and capacitance.

PD200 V6 Manual 8 Rev 1.2, Released, 05-02-2018

PD200 V6 Manual 9 Rev 1.2, Released, 05-02-2018
9Small Signal Bandwidth
The small-signal frequency response and -3 dB bandwidth is described in Figure 3 and Table 4.
Figure 3. Small signal frequency response for a range of load capacitances.
Load Capacitance
Bandwidth
No Load
684 kHz
10 nF
759 kHz
30 nF
720 kHz
100 nF
388 kHz
300 nF
172 kHz
1 uF
60 kHz
3 uF
21 kHz
10 uF
6.4 kHz
30 uF
2.4 kHz
110 uF
940 Hz
Table 4. Small signal bandwidth versus load capacitance (-3dB)
103104105106
-10
0
10
20
30
40
Magnitude (dB)
103104105106
-200
-150
-100
-50
0
50
100
Phase (deg.)
Frequency (Hz)
Figure 2. Maximum peak-to-peak voltage versus frequency and load capacitance
300 nF
1 uF
3 uF
10 uF
30 uF
100 nF
30 nF
10 nF

PD200 V6 Manual 10 Rev 1.2, Released, 05-02-2018
10 Noise
The output noise contains a low frequency component (0.03 Hz to 20 Hz) that is independent of the load
capacitance; and a high frequency (20 Hz to 1 MHz) component that is approximately inversely
proportional to the load capacitance.
The noise is measured with an SR560 low-noise amplifier (Gain = 1000), oscilloscope, and Agilent 34461A
Voltmeter. The low-frequency noise is plotted in Figure 4. The RMS value is 650 uV with a peak-to-peak
voltage of 4.3 mV.
Figure 4. Low frequency noise from 0.03 Hz to 20 Hz
The high frequency noise (20 Hz to 1 MHz) is listed in the table below versus load capacitance. The total
RMS noise from 0.03 Hz to 1 MHz is found by summing the RMS values, that is   
  .
Load Cap.
Bandwidth
HF Noise RMS
Total Noise RMS
No Load
684 kHz
1.60 mV
1.72 mV
10 nF
759 kHz
1.65 mV
1.77 mV
30 nF
720 kHz
1.75 mV
1.86 mV
100 nF
388 kHz
2.08 mV
2.17 mV
300 nF
172 kHz
2.18 mV
2.27 mV
1 uF
60 kHz
998 uV
1.19 mV
3 uF
21 kHz
414 uV
771 uV
10 uF
6.4 kHz
295 uV
714 uV
30 uF
2.4 kHz
280 uV
708 uV
110 uF
940 Hz
264 uV
702 uV
Table 5. RMS noise versus load capacitance (0.03 Hz to 1 MHz)