Datasheet > HV859

HV859

更新时间： 2024-11-05 14:53:03

品牌	Logo	应用领域
美国微芯 - MICROCHIP		/
页数	文件大小	规格书
20页	763K
描述
HV859 is a high voltage driver designed for driving Electroluminescent (EL) lamps of up to 5.0 squ

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HV859 数据手册

HV859

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

• 150 nA Shutdown Current

• Wide Input Voltage range of 1.8V to 5V

• Separately Adjustable Lamp and Converter

Frequencies

The HV859 is a high-voltage driver designed for driving

Electroluminescent (EL) lamps of up to 5 in². The input

supply voltage range is from 1.8V to 5V. 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 RSW-Osc to VDD/Ground.

• Output Voltage Regulation

• Split Supply Capability

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 RSW-Osc pin

and VDD pin. The EL lamp driver frequency is set by an

external resistor connected between RSW-Osc pin and

the VDD pin. An external inductor is connected

between the L_Xand VIN for split supply applications. A

capacitor with a value between 0.003 µF to 0.1 µF,

200V rated, is connected between C_Sand ground. The

EL lamp is connected between VA and VB.

Applications

• LCD Backlighting

• Mobile Cellular Phone Keypads

• PDAs

• Handheld Wireless Communication Products

• Global Positioning Systems (GPS)

The switching MOSFET charges the external inductor

and discharges it into the capacitor at C_S. Then, the

voltage at C_Swill start to increase. Once the voltage at

C_Sreaches a nominal value of 105V, 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 ±105V across

the EL lamp.

Package Types

8-lead WDFN

8-lead MSOP

VDD

RSW-Osc

REL-Osc

GND

VDD

RSW-Osc

REL-Osc

GND

Pads of the 8-lead DFN are at the bottom of the package. See Table 2-1 for pin

information.

 2023 Microchip Technology Inc. and its subsidiaries

DS20005711A-page 1

12 3 4 5 6 7...20

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与HV859相关器件

型号	品牌	获取价格	描述	数据表
HV859K7-G	SUPERTEX	获取价格	High Voltage EL Lamp Driver for Low Noise Applications
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

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