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(yè)數(shù)： 33/52頁(yè)
文件大?。?/td> 643K
代理商： PIEZO_SYSTEMS_PRODUCT_CATALOG
TRANSDUCER
ELEMENTS
To convert cantilever to simple beam performance:
Xf, Free Deflection = 1/4X cantilever motion
Fb, Blocked Force = 4X cantilever force
tr, Response Time
≈
1/3X cantilever response
C, Capacitance = same as cantilever capacitance
Characteristics: Center moves up and down.
SIMPLE BEAM CONFIGURATION
+
T
W
X
F
La
B E N D IN G
T R A N S D U C E R C H O IC E S
To convert cantilever to “ S” beam performance:
Xf, Free Deflection = 1/2X cantilever motion
Fb, Blocked Force = 2X cantilever force
tr, Response Time
≈
0.6X cantilever response
C, Capacitance = same as cantilever capacitance
Characteristics: Right end moves ~ linearly.
“ S” BEAM CONFIGURATION
+
T
La
W
X
F
BENDING CONFIGURATIONS
The common bending configurations,piezoceramic mate-
rials, bender thicknesses, and methods of mounting are
shown below.
Typically PSI-5A piezoceramic is the first choice of most
designers. 5A is the most temperature insensitive and
offers the widest temperature range. PSI-5A achieves
motion similar to PSI-5H if higher voltage is available.
PSI-5H is recommended only when low voltage operation
is essential.
PIEZOCERAMIC MATERIAL
Totally non-magnetic piezo transducers are specially fabricat-
ed using non-magnetic electrode and center shim materials.
NON-MAGNETIC
High temperature piezo actuators are specially construct-
ed to operate up to 150° C.
HIGH TEMPERATURE
Cryogenic piezo actuators are specially constructed to
operate below 4.2° C. Motor performance is reduced by
~1/5 at 77° K and ~1/7 at 4.2° K. However,much higher
voltages may be applied to the bender,thereby recovering
lost performance.
CRYOGENIC
Vacuum compatible piezo actuators are constructed to be
baked-out up to 150°C and have a low cross-section for
outgassing.
VACUUM
Series operation refers to a bender with voltage applied
across both piezoceramic layers. It is a two wire device,
with one wire attached to each of the outside surfaces.
Parallel operation refers to a bender with voltage applied
across each piezoceramic layer individually. It is a three
wire device,with one wire attached to each of the outside
surfaces and a third wire attached to the center shim . For
the same motion, a bender polarized for series operation
requires twice as much voltage as a bender poled for par-
allel operation (see page 46). Polarization is depicted
graphically as an arrow pointing from the positive elec-
trode to the negative electrode.
SERIES & PARALLEL OPERATION
Center shim materials are available for enhancing strength
(stainless steel), thermal range, non-magnetism (brass),
and economy (brass). Specially designed center shims
promote unique composite properties.
CENTER SHIM MATERIALS
T
La
W
X
+
F
Standard Materials: PSI-5A type or PSI-5H type piezoceramic
Standard Thickness,T: .015” (.38 mm)
.020” (.50 mm),
.026” (.66 mm)
Characteristics: Right end moves along arc. Simplest to mount.
CANTILEVER CONFIGURATION
33
CATALOG #3, 1998
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