Microchip HV892 Handleiding
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2022 Microchip Technology Inc. and its subsidiaries DS20005712A-page 1
HV892
Features
• Drives Capacitive Loads up to 200 pF
• Programmable Drive Amplitude (Compatible with
40 VRMS to 60 VRMS lenses)
• On-chip Boost Converter
• 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
Applications
• Cellphone Cameras
• PDA and Ultracompact Cameras
• Bar Code Readers
• Web and Laptop Cameras
General Description
The HV892 liquid lens driver is controlled via an I
2C
interface. It is capable of driving capacitive loads of up
to 200 pF and is compatible with 40 VRMS to 60 VRMS
lenses.
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.
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.
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.
Package Type
10-lead DFN
(Top view)
Pads are at the bottom of the package. Center heat slug is at ground potential. See Table 2-1 for pin
information.
8
2
3
47
6
5
VIN
SCL
NC
SDA
VDD
OUT1
OUT2
GND2
101
GND1 HV
9
Inductorless Liquid Lens Driver
Probleemoplossing Microchip HV892
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Specificaties
| Merk: | Microchip |
| Categorie: | Niet gecategoriseerd |
| Model: | HV892 |