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HV857LK7-G PDF预览

HV857LK7-G

更新时间: 2024-11-04 03:09:15
品牌 Logo 应用领域
超科 - SUPERTEX 驱动器
页数 文件大小 规格书
8页 700K
描述
Low Noise, High Voltage EL Lamp Driver IC

HV857LK7-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:DFN
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:5.6
接口集成电路类型:EL DISPLAY DRIVERJESD-30 代码:S-PDSO-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:PLASTIC/EPOXY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

HV857LK7-G 数据手册

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HV857L  
Low Noise, High Voltage EL Lamp Driver IC  
Features  
Audible noise reduction  
190 VPP output voltage for higher brightness  
Single cell lithium ion compatible  
150nA shutdown current  
Wide input voltage range 1.8V to 5.0V  
Separately adjustable lamp and converter  
frequencies  
General Description  
The Supertex HV857L is a low noise, high voltage driver  
designed for driving Electroluminescent (EL) lamps of up to five  
square inches. It is the low noise version of the EL lamp driver  
HV857. 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/ground.  
Output voltage regulation  
The HV857L 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  
between the REL-Osc and VDD pins. 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 the VA and VB  
pins.  
Split supply capability  
Available in DFN-8 and MSOP-8 packages  
Applications  
Mobile cellular phones  
Keypad backlighting  
LCD backlighting  
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
8
VDD  
VA  
+
_
CDD  
RSW  
EL Lamp  
VDD  
VB  
7
2
3
4
RSW-Osc  
REL-Osc  
GND  
6
5
CS  
LX  
REL  
+
_
D
CIN  
VIN  
CS  
LX  
HV857LMG  

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