|
|
PDF HV892 Data sheet ( Hoja de datos )
| Número de pieza | HV892 | |
| Descripción | Inductorless Liquid Lens Driver | |
| Fabricantes | Supertex | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de HV892 (archivo pdf) en la parte inferior de esta página. Total 6 Páginas | ||
|
No Preview Available !
Supertex inc.
Inductorless
Liquid Lens Driver
HV892
Features
►►Drives capacitive loads up to 200pF
►►Programmable drive amplitude
(compatible with 40VRMS to 60VRMS lenses)
►►On-chip boost converter
►►No external inductor
►►I2C interface
►►Low operating current (≤20mA)
►►Low standby current (≤1.0µA)
►►Controlled drive edge reduces EMI
►►10-Lead 4x4mm DFN Package
Applications
►►Cell phone cameras
►►PDA and ultracompact cameras
►►Bar code readers
►►Web and laptop cameras
General Description
The HV892 liquid lens driver 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 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 1.0µA.
When active, the HV892 draws less than 20mA.
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 reduces EMI.
The HV892 is offered in a 10-Lead 4x4mm DFN package.
Typical Application Circuit
I2C bus
VIN
2.65 - 5.5V
CIN
2.2μF 6.3V
VDD
1.7 - 2.95V
VIN HV
HV892
SDA
SCL
VDD
GND1
OUT1
GND2 OUT2
CHV
4.7nF 100V
Liquid Lens
100 - 200pF
Doc.# DSFP-HV892
A042314
Supertex inc.
www.supertex.com
1 page  
HV892
Pin Functions
Pin Name Description
1 GND1 Ground for the DC–DC converter. Connect GND1 and GND2 together close to the IC.
2 VIN Input voltage. Bypass with a 2.2µF capacitor to GND1.
3 SCL Clock for the I2C interface. The HV892 is a Fast Mode device (fSCL ≤ 400kHz).
4
SDA
Serial data for the I2C interface. The HV892 is a write-only device, with a single 8-bit command byte
(AMP, see page 4).
5 VDD Externally supplied reference voltage for the I2C logic levels. Connect to the I2C bus supply.
6 GND2 Ground for the IC except the DC-DC converter. Connect GND1 and GND2 together close to the IC.
7 OUT2 Outputs of the H-bridge driver. The liquid lens connects between these two pins.
8 OUT1 When disabled (AMP = 00h), both of these outputs are held at ground.
9 NC Not connected.
10
HV
High voltage DC output of the internal boost converter. Connect a 4.7nF, 100V ceramic capacitor to
ground close to the IC.
Exposed backside pad is at ground potential and should be connected to circuit ground.
Doc.# DSFP-HV892
A042314
Supertex inc.
5 www.supertex.com
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet HV892.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| HV892 | Inductorless Liquid Lens Driver | Supertex |
| HV895 | Liquid Lens Driver | Supertex |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |