摘要：采用现场可编程门阵列（FPGA）实现了自动相机聚焦（AF）镜头模块位置控制电机伺服控制系统集成电路（IC）的全数字控制设计。 镜头模块位置控制驱动电机由具有数字伺服驱动 的音圈电机（VCM）担任，数字伺服驱动 包括数字伺服控制器、数字电流控制器和全桥DCDC转换器，系统能为高性能、轻质量和超薄型的移动式自动相机的AF镜头模块位置控制提供完整的数字控制方案，使相机的AF镜头模块控制范围在30 ms内可以达到06 mm，控制分辨率小于5 μm，驱动力峰值为30 mN，输出电流峰值为120 mA。
关键词：FPGA；电流环；位置环；转速环；集成电路

Abstract:  This paper implemented a fully digital control IC for the position control motor servo control system of the autofocus (AF) lens module in applications to mobile camera using the field programmable gate array (FPGA). The position control drive motor of AF lens module was driven by a voicecoil motor (VCM) with a digital servo drive IC. The proposed digital servo drive IC included a digital servo controller, a digital current controller, and a fullbridge DCDC converter. The system can provide a total digital solution to the position control of the AF lens module position control in applications to high performance,lightweight and slimtype mobile phone camera, and makes the AF lens module position control can reach a control range of 06 mm within 30 ms with a control resolution less than 5 μm, a peak driving force of 30 mN, and a peak output current of 120 mA.
Key words: FPGA; current loop; position loop; velocity loop; IC