Datasheet > HV859K7-G

HV859K7-G

更新时间： 2024-11-25 03:03:27

品牌	Logo	应用领域
超科 - SUPERTEX		驱动器接口集成电路高压
页数	文件大小	规格书
6页	266K
描述
High Voltage EL Lamp Driver for Low Noise Applications

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中文翻译

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HV859K7-G 数据手册

Supertex inc.

HV859

Initial Release

High Voltage EL Lamp Driver for Low Noise Applications

Features

General Description

ꢀ Patented audible noise reduction

ꢀ Patented lamp aging compensation

ꢀ 210 V_PPoutput 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 Supertex HV859 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 105V. The chip can be

enabled/disabled by connecting the resistor on R_SW-OSCto V_DD/

ground.

The HV859 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 R

pin and the supply pin V_DD. The EL lamp

driver frequen^Sc^Wy^-Oi^Ss^Cset by an external resistor connected

Applications

ꢀ LCD backlighting

ꢀ Mobile Cellular Phone keypads

ꢀ PDAs

ꢀ Handheld wireless communication products

ꢀ Global Positioning Systems (GPS)

between R

pin and the V_DDpin. An external inductor is

connected ^Eb^Le^-Ot^Sw^Ceen the L and V_DDpins or V_INfor split supply

applications. A 0.003-0.1^XµF capacitor is connected between

C and ground. The EL lamp is connected between V_Aand

V_B^S.

The switching MOSFET charges the external inductor and

discharges it into the capacitor at C_S. The voltage at C will start

to increase. Once the voltage at C_Sreaches a nomi^Snal value

of 105V, the switching MOSFET is turned OFF to conserve

power. The outputs V_Aand V are conﬁgured as an H bridge

and are switching in opposite^Bstates to achieve 105V across

the EL lamp.

Typical Application Circuit

Enable

ON = V_DD

OFF = 0V

R_SER

V_DD

V_A

V_B

R_SW

R_SW-osc

R_EL-osc

GND

C_DD

EL Lamp

V_DD

C_S

L_X

R_EL

HV859MG/

HV859K7

L_X

C_IN

C_S

V_IN

NR040306

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

12 3 4 5 6

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与HV859K7-G相关器件

型号	品牌	获取价格	描述	数据表
HV859MG-G	SUPERTEX	获取价格	High Voltage EL Lamp Driver for Low Noise Applications
HV860	SUPERTEX	获取价格	Low Noise Dimmable EL Lamp Driver
HV860	MICROCHIP	获取价格	HV860 is a high voltage driver designed for driving Electroluminescent, (EL), lamps of up
HV860K7-G	SUPERTEX	获取价格	Low Noise Dimmable EL Lamp Driver
HV861	SUPERTEX	获取价格	Dimmable, Low Noise, Dual EL Lamp Driver
HV861	MICROCHIP	获取价格	HV861 is a low noise, dimmable, high voltage, dual EL Lamp driver designed for driving two
HV861K7-G	SUPERTEX	获取价格	Dimmable, Low Noise, Dual EL Lamp Driver
HV862	SUPERTEX	获取价格	Dimmable, Low Noise, Dual EL Lamp Driver
HV862K7-G	SUPERTEX	获取价格	Dimmable, Low Noise, Dual EL Lamp Driver
HV8708DJ	ETC	获取价格	Interface IC

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