HV841

更新时间： 2024-11-21 03:43:11

品牌	Logo	应用领域
超科 - SUPERTEX		驱动器高压
页数	文件大小	规格书
7页	298K
描述
High Voltage Dual EL Lamp Driver

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HV841 数据手册

Supertex inc.

HV841

Initial Release

High Voltage Dual EL Lamp Driver

Features

General Description

ꢀ

Independent input control for lamp selection

The Supertex HV841 is a high voltage driver designed for driving

two EL lamps with a combined area of 3.5 square inches. The input

supply voltage range is from 2.0V to 5.8V. The device is designed to

reduce the amount of audible noise emitted by the lamp. This device

uses a single inductor and minimum number of passive components

to drive two EL lamps. The nominal regulated output voltage of

100V is applied to the EL lamps. The chip can be enabled/ disabled

by connecting C₁and C₂(pins 1 and 4) to V_EN/ Ground.

Split supply capability

Patented output timing

One miniature inductor to power both lamps

Low shutdown current

Wide input voltage range 2.0V to 5.8V

Output voltage regulation

No SCR output

Available in small packages (10-lead MSOP and

10-lead DFN/MLP)

The HV841 has an internal oscillator, a switching MOSFET, and two

high voltage ELlamp drivers. An external resistor connected between

the R_SW-OSCand the voltage supply pin V sets the frequency for the

switching MOSFET. The EL lamp driver^Df^Drequency is set by dividing

the MOSFET switching frequency by 128. An external inductor is

connected between the L_Xand the V_DDpins. Depending on the EL

lamp size, a 1.0 to 10.0nF, 200V capacitor is connected between C_S

and Ground. The two EL lamps are connected between EL₁to Com

and EL₂to Com.

Applications

ꢀ

Mobile cellular phones, dual display

Keypad and LCD backlighting

Portable instrumentation

Dual segment lamps

The switching MOSFETcharges the external inductor and discharges

it into the capacitor at C_S. The voltage at C_Sincreases. Once the

voltage at C_Sreaches a nominal value of 100V, the switching

MOSFET is turned off to conserve power. The outputs EL to Com

and EL to Com are conﬁgured as H bridges and switch in¹opposite

states t²o achieve 200V across the EL lamp.

Hand held wireless communication devices

Typical Application Circuit

V_EN= ON

0 = OFF

EL Lamp 1¹

V_EN= ON

0 = OFF

C₁

EL₁

EL₂

V_DD

R_SW-OSC

EL Lamp 2¹

R_SW-OSC

Com

V_DD

C_DD

C_S

L_X

GND

HV841MG-G/

HV841K6-G

L_X

C_S

V_IN

C_IN

The bigger sized lamp should be tied to EL1 and the smaller

sized lamp to EL2 terminals (pins 10 and 9 respectively)

NR033106

Supertex inc. 1235 Bordeaux Drive, Sunnyvale, CA 94089 Tel: (408) 222-8888 FAX: (408) 222-4895 www.supertex.com

12 3 4 5 6 7

中文翻译

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与HV841相关器件

型号	品牌	获取价格	描述	数据表
HV841K6-G	SUPERTEX	获取价格	High Voltage Dual EL Lamp Driver
HV841MG-G	SUPERTEX	获取价格	High Voltage Dual EL Lamp Driver
HV843	SUPERTEX	获取价格	Low Noise Dual EL Lamp Driver
HV843DB1	SUPERTEX	获取价格	Low Noise, Dual EL Lamp Driver
HV843K7-G	SUPERTEX	获取价格	Low Noise Dual EL Lamp Driver
HV845	SUPERTEX	获取价格	Low Noise Dual EL Lamp Driver
HV845DB1	SUPERTEX	获取价格	Low Noise, Dual EL Lamp Driver
HV845K7-G	SUPERTEX	获取价格	Low Noise Dual EL Lamp Driver
HV850	SUPERTEX	获取价格	High Voltage Low Noise Inductorless EL Lamp Driver
HV850	MICROCHIP	获取价格	HV850 is a high voltage electroluminescent (EL) Lamp Driver IC. It is designed to drive EL

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