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參數資料
| 型號： | HV857 |
| 廠商： | Supertex, Inc. |
| 英文描述： | High Voltage EL Lamp Driver for Low Noise Applications |
| 中文描述： | 高壓發光燈驅動器的低噪聲應用 |
| 文件頁數： | 1/2頁 |
| 文件大小： | 437K |
| 代理商： | HV857 |
HV857DB1
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.
HV857DB1
EL Lamp Driver
Introduction
The Supertex HV857DB1 demo board contains all necessary
circuitry to demonstrate the features of the HV857 EL lamp
driver.
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).
Specifications
Input Voltage
1.8V to 5.0V
Supply Current
25mA
Lamp Size Range
up to 2.6in
2
Lamp Frequency
250Hz
Converter Frequency
80KHz
Demo Board Connections:
EN
Enable Input
Enables/Disables the lamp driver. A logic high (connect to V
DD
)
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
20K
.
V
DD
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.
V
IN
Inductor Supply
Supplies the high voltage power converter. Connect to positive
terminal of a power supply.
GND
Circuit Ground
Connect to V
and V
negative terminals. Supply bypass
capacitors for both V
DD
and V
IN
are provided on the demo board.
External supply bypass capacitors are not required.
V
A
and V
B
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.
Board Layout and Connections
HV857
Cdd
Rel
Rsw
Cin
+
L
X
D
Cs
V
IN
EN
V
DD
GND
V
B
V
A
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相關代理商/技術參數 |
參數描述 |
|---|---|
| HV857_07 | 制造商:SUPERTEX 制造商全稱:SUPERTEX 功能描述:Low Noise, High Voltage EL Lamp Driver IC |
| HV857DB1 | 功能描述:電源管理IC開發工具 HV857 Demo Board RoHS:否 制造商:Maxim Integrated 產品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| HV857K7-G | 功能描述:顯示驅動器和控制器 High Voltage Low Noise EL Lamp RoHS:否 制造商:Panasonic Electronic Components 工作電源電壓:2.7 V to 5.5 V 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Reel |
| HV857L | 制造商:SUPERTEX 制造商全稱:SUPERTEX 功能描述:Low Noise, High Voltage EL Lamp Driver IC |
| HV857LDB1 | 功能描述:電源管理IC開發工具 HIGH VOLTAGE LOW NOISE EL LAMP DRIVER DEMOBOARD RoHS:否 制造商:Maxim Integrated 產品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
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