Part Number: EPA-007-012
Input Adapter:
115VAC/60Hz
Output: ±180 Vp / ±30 mA
Part Number: EPA-007-012B
Universal Input Adapter:
Output: ±180 Vp / ±30 mA
100-240VAC / 50-60Hz
ROHS:
Product compliant.
Description: The EPA-007 is a high voltage linear amplifier with an integral high voltage power supply.
It is designed to be small in size and convenient for both bench top experimentation and OEM installation. It utilizes
a single 15 VDC power input which can be provided directly, or by using either the 115VAC/60Hz or 100-240VAC/50-60Hz Universal
power adapter (provided). It accepts a +/- 10 Vpeak ground referenced input signal and produces a +/- 180 Vpeak ground referenced
output drive signal.
It is designed to be used as a high voltage drive source for various piezoelectric actuating devices operated from DC to the
low audio frequency range.
Typical Application Diagrams
FEATURES
Input Power: For bench top experimentation, where minimum setup time and flexibility of amplifier location are advantageous,
an AC adapter is provided for DC input power. Two types are offered:
A 115VAC/60Hz to 15VDC is included with the EPA-007-012.
A 100-240VAC/50-60Hz to 15VDC (Universal Adapter) is
included with the EPA-007-012B. One end of the power cord plugs into the adapter and the customer supplies the plug for the other end.
For OEM or permanent installation, a set of screw terminals is provided for DC input (13 to 18VDC) power.
Signal Input: Input to the amplifier is made by connecting wires to the screw terminal connector on the I/O panel at one end of
the unit. This is a ground referenced ± 10 Vpeak low voltage input.
High Voltage Output: A ground referenced output from the amplifier appears at the two screw terminals on the I/O panel.
Loads: The EPA-007 is designed for driving piezoelectric actuator loads.
Input and Output Protection: Piezo loads present special problems to electronic drivers. The EPA-007 provides input
and output protection to take care of all shorting, turn-on, turn-off, and load generated voltage occurrences which can damage
either the amp or your actuator.
ESTIMATING THE CURRENT REQUIREMENT OF
A PIEZOELECTRIC ACTUATOR
To estimate the peak current requirement of a piezoelectric actuator, solve the appropriate equation:
Ipeak (in Amperes) =
2 π f C Vpeak
(driven with a sine wave)
Ipeak (in Amperes) =
4 f C Vpeak
(driven with a triangle wave)
Ipeak (in Amperes) =
C dV / dt
(driven with a square wave)
Where f is the maximum operating frequency in Hertz, C is the capacitance of the piezo device in Farads, dt is the square wave
rise time, and Vp is maximum peak drive voltage. The amplifier must be able to supply Vp, lp and f simultaneously.
ELECTRICAL
Maximum Voltage
± 180 volts peak
Maximum Current
± 30 mA peak continuous
Output Power
5.4 watts peak
Frequency Range
DC to 1.5 KHz
Voltage Gain
Fixed: 20X ± 5%
Maximum Input Voltage (AC plus DC)
± 10 volts peak
Maximum DC Component
± 10 volts DC
Input Coupling
DC coupled
Input Impedance
10K ohm
Output Coupling
DC coupled
Output Ripple
typically < 35 mVrms, with input shorted
Power Source
+ 13 VDC to +18 VDC, 750 mA
Current Draw
400 mA no load; 700 mA full load
Circuit Protection
Overload, short circuit and thermal protection
MECHANICAL
Indicators
Green LED "on" indicator
Cooling
Internal brushless DC fan
Weight
256 g (.56 lb)
Dimensions
6.2" (157mm) long x 3.3" (84mm) wide x 1.8" (46mm) high
PEAK OUTPUT VOLTAGE vs. FREQUENCY FOR VARIOUS CAPACITIVE LOADS
Steady state sinusoidal waveforms,
Temperature = 25 ° C
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