行业资料-交通装置-LNG车载瓶内剩余液体量直接测量的板式电容传感器.zip
2021-08-29 18:03:41
543KB
行业资料-交通装置-LNG车载瓶内剩余液体量直接测量的板式电容传感器[1].zip
2021-08-29 18:03:41
546KB
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.
2021-08-28 14:47:07
424KB
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