HV895

Parameter                                 Value
V_IN, V_DD                                 -0.5V to 6.5V
SDA, SCL                                -0.5V to 6.5V
Operating temperature          -40 to +85
Storage temperature             -65 to +150

Device may not meet specifi cations, but will incur no damage.

The HV895 is designed to drive liquid lenses of up to 200pF with a 1.5kHz waveform at amplitudes up to 60VRMS, controlled via an I²C interface.

A single byte (AMP) written to the HV895 controls the operation of the driver. Setting AMP = 01h to FFh controls output amplitude in 255 monotonic steps. Setting AMP = 00h causes the HV895 to go into low power standby mode, consuming less than 1.0A. When active, it draws less than 20mA.

A charge pump boost converter integrated on-chip HV895 provides the high voltage necessary for driving the lens. No external inductors or diodes are needed. Two ceramic 0402 size capacitors are the only external components required for a complete lens driver circuit. The narrow die size and only 2 small external components allow an entire lens driver circuit to be incorporated inside a camera module.

An H-bridge output stage of HV895 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 HV895 is offered in a 1.0mm * 6.0mm lead-free solderbumped fl ip-chip.