HV895

更新时间： 2024-11-04 03:43:11

品牌	Logo	应用领域
超科 - SUPERTEX		驱动器
页数	文件大小	规格书
5页	494K
描述
Liquid Lens Driver

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中文翻译

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数据手册

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HV895 数据手册

HV895

Liquid Lens Driver

General Description

Features

The HV895 is designed to drive liquid lenses of up to 200pF with

a 1.5kHz waveform at amplitudes up to 60V_RMS, controlled via an

I²C interface.

► Drives capacitive loads up to 200pF

► Programmable drive amplitude (up to 60V_RMS

► On-chip boost converter

)

► No external inductor

A single byte (AMP) written to the HV895 controls the operation of

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

255 monotonic steps. Setting AMP = 00h causes the HV895 to go

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

active, the HV895 draws less than 20mA.

► I²C interface

► Low operating current (≤20mA)

► Low standby current (≤1.0µA)

► Controlled drive edge reduces EMI

► 1.0mm × 6.0mm ﬂip-chip

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 0402 size capacitors are the

only external components required for a complete lens driver

circuit. The narrow die size and only 2 small external components

allow an entire lens driver circuit to be incorporated inside a

camera module.

Applications

► Cell phone and PDA cameras

► Bar code readers

► Web and laptop cameras

► Biometric scanners

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.

► Ultracompact cameras

The HV895 is offered in a 1.0mm × 6.0mm lead-free solder-

bumped ﬂip-chip.

Typical Application Circuit

I²C bus

V_DD

1.7 -2.95V

VDD

OUT1

SDA

SCL

Liquid Lens

100 -200pF

HV895

OUT2

V_IN

2.65 - 5.5V

VIN1

VIN2

GND1 GND2

C_IN

2.2μF

6.3V

C_HV

4.7nF

100V

12 3 4 5

中文翻译

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