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參數(shù)資料
| 型號(hào)： | PIEZO_SYSTEMS_PRODUCT_CATALOG |
| 英文描述： | 600mA, 500kHz Step-Down Switching Regulator in SOT-23; Package: SOT; No of Pins: 6; Temperature Range: -40°C to +125°C |
| 文件頁數(shù)： | 6/52頁 |
| 文件大?。?/td> | 643K |
| 代理商： | PIEZO_SYSTEMS_PRODUCT_CATALOG |
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ELECTRONICS
P
IEZ O
S
Y ST EMS
, I
NC
.
186 Mssachusetts Avenue Cambridge, MA02139 Te: (617) 547-1777 Fax: (617) 354-2200 Web wwwpezocom E-mail: sales@pezocom
P IE Z O S W IT C H IN G
L
L
I G H T W E I G H T
N E R G Y
A MP L IF IE R
- C
- E
E
E
F F I C I E N T
O M P
A
A
C T
Piezo Switching Amplifier, ± 180 Vp/±500mA (115 VAC, 60 Hz)
ESA-208-115
$1,799
ORDERING INFORMATION
PART NO.
PRICE
DESCRIPTION
PIEZO SYSTEMS INC.
DC OFFSET
INPUT
OUT
GND
MODEL ESA-203
+
–
POLARITY
POWER
7.4"
(188)
2.7"
(69)
9.6"
(244)
0
OVER CURRENT
RESET
The ESA-208 achieves its flat response and wide band-
width by employing a unique technology which is patent
pending. It is the first of its kind to be offered for sale,
and demonstrates concretely a future trend in miniatur-
ization for high voltage power circuitry that will open up
new practical applications for piezo actuators.
The ESA-208 is a lightweight (3 lbs.), compact (7.4”W x
2.7”H x 9.6”D), high voltage (± 180 Vp),high current (±
500 mA), and audio frequency (DC to 5 KHz) amplifier
designed to drive high capacitive loads, such as low volt-
age stacks, at moderate frequencies or low capacitive
loads,such as acoustic sources,at high frequencies.
Principle of Operation: The input signal to the amplifier
is converted into a train of width modulated pulses.The
polarity and duration of these pulses alternately control
the turn on and turn off of two (high and low) high volt-
age power switches operating at 200 KHz. The high fre-
quency carrier is filtered out to pass the audio signal.
High Current Capability:
achieves voltage control by intelligently adjusting the
resistance value of the output stage which is in series with
the load. If the load draws .5 amps,all that current must
flow through the output stage resistance and be turned
into heat. By contrast,the switching amplifier has an out-
put stage which is either fully on of fully off (never in
between), and so is capable of metering out far higher
currents for the same size circuit with a minimum of heat
loss.
Input and Output Protection: Piezo loads present special
problems to electronic drivers. The ESA-208 provides
input and output protection to take care of turn-on,turn-
off, and load generated voltage occurrences which can
damage either the amp or your actuator.
Manual Bias Controls (Polarity and DC offset): Useful for
making manual adjustments of drive voltage to verify
piezo actuator static motion, for static setting, or for
applying DC bias to dynamically driven piezo actuators
such as piezo stacks.
External Control (via analog signal to the BNC input con-
nector): Accepts up to ± 10 Vp signal waveforms from
external signal generators,computer controllers,or feed-
back networks from DC to rated frequency. The com-
bined AC plus DC offset voltage is adjustable from zero
to the maximum rated voltage.
A typical linear amplifier
Piezo Systems offers a single channel audio frequency
switching amplifier for driving a variety of piezo actuators,
including stacks,bimorphs,and single sheets.
6
CATALOG #3, 1998
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