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HV857DB1

更新时间： 2024-11-03 22:22:39
品牌 Logo 应用领域
超科 - SUPERTEX 驱动器
页数 文件大小 规格书
2页 438K
描述
EL Lamp Driver

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HV857DB1 数据手册

 浏览型号HV857DB1的Datasheet PDF文件第2页 
HV857DB1  
EL Lamp Driver  
Introduction  
The Supertex HV857DB1 demo board contains all necessary  
circuitry to demonstrate the features of the HV857 EL lamp  
driver.  
Specifications  
Input Voltage  
1.8V to 5.0V  
25mA  
Supply Current  
Lamp Size Range  
Lamp Frequency  
Converter Frequency  
up to 2.6in2  
250Hz  
Simply connect it to a power supply and a lamp. For additional  
assistance in designing EL driver circuits, please refer to appli-  
cation notes AN-H33 (effect of external components on perfor-  
mance of Supertex EL drivers) and AN-H43 (EL lamp driver  
circuits to reduce audible lamp noise).  
80KHz  
Board Layout and Connections  
V
V
DD  
V
B
A
Cdd  
Rsw  
Rel  
HV857  
EN  
+
Cin  
Cs  
GND  
LX  
D
V
IN  
Demo Board Connections:  
VIN Inductor Supply  
Supplies the high voltage power converter. Connect to positive  
terminal of a power supply.  
EN Enable Input  
Enables/Disables the lamp driver. A logic high (connect to VDD  
)
enables the driver and a logic low (connect to GND) disables the  
driver. This input can be connected to a mechanical switch, or  
to a logic circuit output with a source impedance of less than  
20KΩ.  
GND Circuit Ground  
Connect to VDD and VIN negative terminals. Supply bypass  
capacitors for both VDD and VIN are provided on the demo board.  
External supply bypass capacitors are not required.  
VDD IC Supply  
Supplies the HV857 EL driver IC. The supplied circuit is opti-  
mized for 3.0V operation. The operating range can be from 1.8V  
to 5.0V. Connect to positive terminal of a power supply.  
VA and VB Lamp Connections  
Connect to an EL lamp. Polarity is irrelevant.  
* Note: Make sure all the above connections are made before powering up the supply voltages.  
11/27/01  
Supertex Inc. does not recommend the use of its products in life support applications and will not knowingly sell its products for use in such applications unless it receives an adequate "products liability  
indemnification insurance agreement." Supertex does not assume responsibility for use of devices described and limits its liability to the replacement of devices determined to be defective due to  
workmanship. No responsibility is assumed for possible omissions or inaccuracies. Circuitry and specifications are subject to change without notice. For the latest product specifications, refer to the  
Supertex website: http://www.supertex.com. For complete liability information on all Supertex products, refer to the most current databook or to the Legal/Disclaimer page on the Supertex website.  
12

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