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OIS driver aims to boost autofocus capability of smartphones

Posted: 30 Nov 2015     Print Version  Bookmark and Share

Keywords:Renesas Electronics  optical image stabilisation  OIS  smartphone  driver 

Renesas Electronics Corp. has introduced a power-efficient, advanced-functionality optical image stabiliser (OIS) driver IC that promises highly precise and wide-range positioning for advanced smartphone cameras. According to the company, the RAA305315GBM integrates a CPU, a DSP and peripheral parts on a single chip to improve performance.

In addition, the company is providing a comprehensive development environment, including firmware, development tools, evaluation boards and manuals, to help system manufacturers meet their development requirements and accelerate the implementation of advanced optical image stabilisation functionality into mobile platforms.

The high-performance 32bit CPU and DSP is suitable for servo control processing support for three-servo control, stated Renesas. This makes it possible to drive different types of actuators, including voice coil motors (VCM), piezoelectric elements and shape-memory alloy (SMA) actuators. This single-chip device also supports multiple autofocus functions. In addition to open loop autofocus, the newer bidirectional and closed loop autofocus types are supported, enabling more compact camera modules for slimmer smartphone form factors, the company added.


Development tools and environments matched to manufacturer requirements are available. Renesas also offers evaluation boards (available separately) that can be used to start evaluation work right away, helping to reduce the development workload and shorten the time required.

Renesas claims to provide the ability to adjust individual parameters, which can be used to automatically compensate performance inconsistency among individual camera modules during mass production. By storing the parameters in the on-chip flash memory of the IC, it is possible to compensate for performance inconsistency among individual devices without the need to reprogramme (overwrite) the firmware, decreasing the workload during mass production.

The company also provides flexible support for lens shift, lens tilt and module tilt optical image stabilisation by reprogramming (overwriting) the firmware in the flash memory.

Samples of the RAA305315GBM OIS driver IC are available, priced at $10 per unit. Mass production is scheduled to begin in July 2016.

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