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HV857K7-G PDF预览

HV857K7-G

更新时间: 2024-11-04 03:09:11
品牌 Logo 应用领域
超科 - SUPERTEX 驱动器
页数 文件大小 规格书
9页 548K
描述
Low Noise, High Voltage EL Lamp Driver IC

HV857K7-G 技术参数

是否无铅: 不含铅是否Rohs认证: 符合
生命周期:Transferred零件包装代码:SON
包装说明:HVSON,针数:8
Reach Compliance Code:compliantECCN代码:EAR99
HTS代码:8542.39.00.01风险等级:5.61
接口集成电路类型:EL DISPLAY DRIVERJESD-30 代码:S-XDSO-N8
JESD-609代码:e3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:UNSPECIFIED封装代码:HVSON
封装形状:SQUARE封装形式:SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE
峰值回流温度(摄氏度):NOT SPECIFIED认证状态:Not Qualified
座面最大高度:0.8 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:Matte Tin (Sn)端子形式:NO LEAD
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:3 mm
Base Number Matches:1

HV857K7-G 数据手册

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HV857  
Low Noise, High Voltage EL Lamp Driver IC  
Features  
General Description  
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  
a single inductor and a minimum number of passive components.  
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/GND.  
Patented audible noise reduction  
Patented lamp aging compensation  
190 VPP output voltage for higher brightness  
Patented output timing for high efficiency  
Single cell lithium ion compatible  
150nA shutdown current  
Wide input voltage range 1.8V to 5.0V  
Separately adjustable lamp and converter  
frequencies  
Output voltage regulation  
Split supply capability  
The HV857 has two internal oscillators, a switching MOSFET,  
and a high voltage ELlamp 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 between REL-  
Osc pin and 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.  
Available in MSOP-8 and DFN-8 packages  
Applications  
LCD backlighting  
Mobile Cellular Phone  
PDAs  
Handheld wireless communication products  
Global Positioning Systems (GPS)  
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 switching in opposite states to achieve 95V across the  
EL lamp.  
Typical Application Circuit  
Enable Signal  
ON = VDD  
OFF = 0  
1
VDD  
8
VA  
VB  
+
_
CDD  
RSW  
EL Lamp  
VDD  
RSW-Osc  
REL-Osc  
GND  
7
6
5
2
3
4
CS  
LX  
REL  
D
LX  
CS  
+
_
CIN  
HV857MG  
VIN  

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