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