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HV892

更新时间: 2024-11-05 14:55:07
品牌 Logo 应用领域
美国微芯 - MICROCHIP /
页数 文件大小 规格书
14页 1744K
描述
The HV892 liquid lens driver is controlled via an I2C interface, is capable of driving capacitive

HV892 数据手册

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HV892  
Inductorless Liquid Lens Driver  
Features  
General Description  
• Drives Capacitive Loads up to 200 pF  
The HV892 liquid lens driver is controlled via an I2C  
interface. It is capable of driving capacitive loads of up  
to 200 pF and is compatible with 40 VRMS to 60 VRMS  
lenses.  
• Programmable Drive Amplitude (Compatible with  
40 VRMS to 60 VRMS lenses)  
• 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 µA. When  
active, the HV892 draws less than 20 mA.  
• No External Inductor  
• I2C Interface  
• Low Operating Current (≤ 20 mA)  
• Low Standby Current (≤1 µA)  
• Reduced EMI with Controlled Drive Edge  
• 10-lead 4 x 4mm 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  
• Cellphone Cameras  
• PDA and Ultracompact Cameras  
• Bar Code Readers  
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 reduce EMI.  
• Web and Laptop Cameras  
Package Type  
10-lead DFN  
(Top view)  
GND1  
1
2
3
4
5
HV  
10  
9
VIN  
NC  
SCL  
8
OUT1  
OUT2  
GND2  
SDA  
VDD  
7
6
Pads are at the bottom of the package. Center heat slug is at ground potential. See Table 2-1 for pin  
information.  
2022 Microchip Technology Inc. and its subsidiaries  
DS20005712A-page 1  

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