Datasheet > HV892

HV892

更新时间： 2024-02-15 17:13:36

品牌	Logo	应用领域
SIRECTIFIER		驱动器
页数	文件大小	规格书
6页	745K
描述
Inductorless Liquid Lens Driver

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HV892 数据手册

HV892

Inductorless Liquid Lens Driver

General Description

Features

The HV892 liquid lens driver is controlled via an I²C interface, is

capable of driving capacitive loads of up to 200pF, and is compatible

► Drives capacitive loads up to 200pF

► Programmable drive amplitude (compatible with

40V_RMSto 60V_RMSlenses)

with 40V_RMSto 60V_RMSlenses.

► On-chip boost converter

A single byte (AMP) written to the HV892 controls the operation of

the driver. Setting AMP = 01h to FFh controls output amplitude in

255 monotonic steps. Setting AMP = 00h causes the HV892 to go

into low power standby mode, consuming less than 1.0µA. When

active, the HV892 draws less than 20mA.

► No external inductor

► I²C interface

► Low operating current (≤20mA)

► Low standby current (≤1.0µA)

► Controlled drive edge reduces EMI

► 10-Lead 4x4mm DFN Package

A charge pump boost converter integrated on-chip provides the

high voltage necessary for driving the lens. No external inductors

or diodes are needed. Two ceramic chip capacitors are the only

external components required for a complete lens driver circuit.

Applications

► Cell phone cameras

An H-bridge output stage provides AC drive to the lens, allowing

the use of a single high voltage boost converter while providing

alternating polarity to the lens. Controlled rising and falling edges

on the drive waveform reduces EMI.

► PDA and ultracompact cameras

► Bar code readers

► Web and laptop cameras

The HV892 is offered in a 10-Lead 4x4mm DFN package.

Typical Application Circuit

I²C bus

V_IN

VIN

2.65 - 5.5V

C_HV

4.7nF 100V

C_IN

2.2μF 6.3V

HV892

OUT1

SDA

SCL

Liquid Lens

100 - 200pF

V_DD

1.7 - 2.95V

VDD

OUT2

GND1 GND2

12 3 4 5 6

中文翻译

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与HV892相关器件

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