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HV857MG

更新时间： 2024-11-03 22:48:27
品牌 Logo 应用领域
超科 - SUPERTEX 显示驱动器驱动程序和接口接口集成电路光电二极管高压
页数 文件大小 规格书
14页 638K
描述
High Voltage EL Lamp Driver for Low Noise Applications

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HV857MG 技术参数

是否无铅：含铅是否Rohs认证：不符合
生命周期：Transferred零件包装代码：MSOP
包装说明：TSSOP,针数：8
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.06
Is Samacsys：N接口集成电路类型：EL DISPLAY DRIVER
JESD-30 代码：R-PDSO-G8JESD-609代码：e0
长度：3 mm复用显示功能：NO
功能数量：1区段数：1
端子数量：8最高工作温度：85 °C
最低工作温度：-40 °C封装主体材料：PLASTIC/EPOXY
封装代码：TSSOP封装形状：RECTANGULAR
封装形式：SMALL OUTLINE, THIN PROFILE, SHRINK PITCH峰值回流温度（摄氏度）：NOT SPECIFIED
认证状态：Not Qualified座面最大高度：1.092 mm
最大供电电压：5 V最小供电电压：1.8 V
标称供电电压：3.3 V表面贴装：YES
温度等级：INDUSTRIAL端子面层：Tin/Lead (Sn/Pb)
端子形式：GULL WING端子节距：0.65 mm
端子位置：DUAL处于峰值回流温度下的最长时间：NOT SPECIFIED
宽度：2.946 mmBase Number Matches：1

HV857MG 数据手册

 浏览型号HV857MG的Datasheet PDF文件第2页浏览型号HV857MG的Datasheet PDF文件第3页浏览型号HV857MG的Datasheet PDF文件第4页浏览型号HV857MG的Datasheet PDF文件第5页浏览型号HV857MG的Datasheet PDF文件第6页浏览型号HV857MG的Datasheet PDF文件第7页 
HV857  
High Voltage EL Lamp Driver for  
Low Noise Applications  
Features  
General Description  
❏ Patent pending audible noise reduction  
❏ Patent pending lamp aging compensation  
❏ 190VPP output voltage for higher brightness  
❏ Patented output timing for high efficiency  
❏ Single cell lithium ion compatible  
❏ 150nA shutdown current  
The Supertex HV857 is a high voltage driver designed for driving  
Electroluminescent (EL) lamps of up to 5 square inches. The  
input supply voltage range is from 1.8V to 5.0V. The device uses  
asingleinductorandaminimumnumberofpassivecomponents.  
The nominal regulated output voltage that is applied to the EL  
lamp is ±95V. The chip can be enabled/disabled by connecting  
the resistor on Rsw-osc to VDD/ground.  
The HV857 has two internal oscillators, a switching MOSFET,  
and a high voltage EL lamp driver. The frequency for the  
switching MOSFET is set by an external resistor connected  
between the Rsw-osc pin and the supply pin VDD. The EL lamp  
driver frequency is set by an external resistor connected be-  
tween REL-osc pin and the VDD pin. An external inductor is  
connected between the LX and VDD pins or VIN for split supply  
applications. A 0.003-0.1µF capacitor is connected between Cs  
and ground. The EL lamp is connected between VA and VB.  
❏ Wide input voltage range 1.8V to 5.0V  
❏ Separately adjustable lamp and converter frequencies  
❏ Output voltage regulation  
❏ Split supply capability  
Applications  
❏ LCD backlighting  
❏ Mobile cellular phones  
❏ PDAs  
The switching MOSFET charges the external inductor and  
discharges it into the capacitor at Cs. The voltage at Cs will start  
to increase. Once the voltage at Cs reaches a nominal value of  
95V, the switching MOSFET is turned OFF to conserve power.  
The outputs VA and VB are configured as an H bridge and are  
switchinginoppositestatestoachieve ±95VacrosstheELlamp.  
❏ Handheld wireless communication products  
❏ Global Positioning Systems (GPS)  
Typical Application  
Enable Signal  
ON=VDD  
OFF=0  
Regulated Voltage=VDD  
VDD  
1
VA  
8
EL Lamp  
RSW-osc  
VB  
CS  
LX  
7
6
5
2
3
4
+
REL-osc  
Gnd  
V
=VIN  
DD  
CIN  
LX  
HV857MG  
CS  
11/14/01  
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.  
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