參數(shù)資料
型號(hào)： UCC2977
廠商： Texas Instruments, Inc.
英文描述： Multi-Topology Piezoelectric Transformer Controller
中文描述： 多拓?fù)鋲弘娮儔浩骺刂破?/td>
文件頁數(shù)： 9/28頁
文件大?。?/td> 433K
代理商： UCC2977
SLUS499A
–
NOVEMBER 2001
–
REVISED JANUARY 2002
9
www.ti.com
APPLICATION INFORMATION
PZT operation
Ceramic piezoelectric transformers were first proposed by C.A. Rosen in 1956. Unlike magnetic transformers
that rely on electromagnetic energy transfer, PZTs transfer electric potential to mechanical force as shown in
Figure 6. The electrical-to-mechanical conversion of energy is referred to as the
reverse piezoelectric effect
whereas the mechanical-to-electrical energy conversion is referred to as the
direct piezoelectric effect
.
+
ELECTRIC
POTENTIAL
ELECTRIC
POTENTIAL
MECHANICAL
FORCE
MECHANICAL
FORCE
+
UDG
–
01099
Figure 6. Piezoelectric Effect
Each manufacturer has a unique
recipe
of materials and structural layering that determine their PZT
’
s operating
characteristics. Common materials used to make PZTs include lead zirconate, lead titanate and lithium niobate.
Single layer PZTs are less costly and easier to manufacture, but have a lower voltage gain (typically 5 to 10 )
and may require a step-up magnetic transformer in order to operate the lamp. Multi-layered PZT designs are
more difficult to manufacture, but have a higher voltage gain (20 to 70) allowing a CCFL to be driven using
conventional off-the-shelf inductors.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
UCC2977EVM 功能描述:電源管理IC開發(fā)工具 UCC2977 Eval Mod RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評(píng)估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V
UCC2977PW 功能描述:LCD 驅(qū)動(dòng)器 Multi-Topology Piezoelectric RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時(shí)鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube
UCC2977PWG4 功能描述:LCD 驅(qū)動(dòng)器 Multi-Topology Piezoelectric RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時(shí)鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube
UCC2977PWR 功能描述:LCD 驅(qū)動(dòng)器 Multi-Topology Piezoelectric RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時(shí)鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube
UCC2977PWRG4 功能描述:LCD 驅(qū)動(dòng)器 Multi-Topology Piezoelectric RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時(shí)鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube
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