Datasheet Microchip HV892 — Ficha de datos

Supertex inc. HV892
Inductorless
Liquid Lens Driver
General Description Features 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. в–єв–є Drives capacitive loads up to 200pF
в–єв–є Programmable drive amplitude
(compatible with 40VRMS to 60VRMS lenses)
в–єв–є On-chip boost converter
в–єв–є No external inductor
в–єв–є I2C interface
►► Low operating current (≤20mA)
►► Low standby current (≤1.0µA)
в–єв–є Controlled drive edge reduces EMI
в–єв–є 10-Lead 4x4mm DFN Package 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 1.0ВµA.
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. Applications …