LC898212XA
Overview
The AF control device, LC898212XA (LC898212XA-MH), provides an ideal way to implement the reduced power consumption and the improved autofocus precision and speed (reduced convergence time) required in high-pixelcount camera modules for use in smartphones. The LC898212XA integrates on a single chip an equalizer circuit employing digital calculation, and it can be bined with position sensors to build a closed-loop actuator control system. Since closed-loop control provides better ability to maintain the control object than conventional open-loop systems and is not affected by position differences, the LC898212XA is ideal for use in AF systems used in a wide variety of cameras. A closed-loop system uses position sensors for position control, and power consumption is lower than with conventional open-loop control, which uses current values for position control. In addition, a new PWM drive system employed suppresses noise that could affect image quality while achieving reduced...
