Microchip HV892DB1 Bedienungsanleitung
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Supertex inc.
Supertex inc.
www.supertex.com
HV892DB1
Doc.# DSDB-HV892DB1
B032114
General Description
The HV892DB1 liquid lens driver demoboard is controlled via
an I2C interface, is capable of driving capacitive loads of up to
200pF, and is compatible with 40VRMS to 60VRMS lenses.
A charge pump boost converter integrated on-chip provides
the high voltage necessary for driving the lens. No external
inductors or diodes are needed. The board requires only two
ceramic chip capacitors to complete a 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 reduces EMI.
Board Layout and Connections
Inductorless,
Liquid Lens Driver Demoboard
Specications
Parameter Value
Supply voltage (VIN)2.65 – 5.50V:
Supply current (IIN
):20mA max operating
500nA max standby
Output voltage (OUT1 – OUT2):9.8 – 62.6VRMS,
adjustable via I2C
Load (lens) capacitance100 – 200pF:
I2C reference voltage (VDD)1.70 – 2.95V:
I2C clock:400kHz max
I2C address (7-bit):0100011b
Board dimensions:35.6mm x 26.2mm
Connections:
VIN
Supply voltage to the HV892. Externally supplied VIN should
be between 2.65 and 5.50V.
GND
Circuit common.
VDD
Externally supplied logic reference voltage for the I2C inter-
face. VDD should be between 1.70 and 2.95V.
SCL
I2C clock. Clock frequency should be no greater than
400kHz.
SDA
I2C data.
OUT1 OUT2 and
The lens driver output. Connect the lens between these two
terminals. Load (lens) capacitance should be between 100
and 200pF, including any stray capacitance.
Note:
The resistors shown in the connection diagram are the
normal I2C pull-ups. No additional pull-ups are required.
IC1
CIN CHV
Liquid Lens
100 - 200pF
VIN =
2.65 - 5.5V
V
DD =
1.70 - 2.95V
I2
C Bus SCL
SDA
{
Produktspezifikationen
| Marke: | Microchip |
| Kategorie: | Nicht kategorisiert |
| Modell: | HV892DB1 |
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