DRV201YFMT

DRV201器件是一款用于摄像机自动对焦的高级音圈电机驱动器。它有一个用于设定VCM电流的集成型数模转换器。VCM电流由一个固定频率PWM控制器或者一个线性模式驱动器控制。可通过I²C寄存器选择电流生成。DRV201器件集成有感应电阻以实现电流调节，并可通过I²C控制电流。 当改变VCM内的电流时，镜头振铃由高级振铃补偿功能进行补偿。振铃补偿大大减少了自动对焦所需的时间。此器件还有一个VCM短路和开路保护功能。 The DRV201 device is intended for high performance autofocus in camera modules. The device is used to control the current in the voice coil motor (VCM). The current in the VCM generates a magnetic field which forces the lens stack connected to a spring to move. The VCM current and thus the lens position can be controlled via the I²C interface and an auto focus function can be implemented. The device connects to a video processor or image sensor through a standard I²C interface which supports up to 400-kbit/s data rate. The digital interface supports IO levels from 1.8 V to 3.3 V. All pins have 4-kV HBM ESD rating. When SCL is low for at least 0.5 ms, the device enters SHUTDOWN mode. If SCL goes from low to high the driver enters STANDBY mode in less than 100 μs and default register values are set. ACTIVE mode is entered whenever the VCM_CURRENT register is set to something else than zero. VCM current can be controlled via an I²C interface and VCM_CURRENT registers. Lens stack is connected to a spring which causes a dampened ringing in the lens position when current is changed. This mechanical ringing is compensated internally by generating an optimized ramp whenever the current value in the VCM_CURRENT register is changed. This enables a fast autofo

• 针对VCM的高效PWM电流控制
• 高级振铃补偿
• 针对VCM电流控制的集成型10位数模转换器
• 保护：
  • VCM引脚上的开路和短路检测
  • 欠压闭锁(UVLO)
  • 过热保护
  • VCM输出上的开路或短路保护
  • 针对VCM驱动器的内部电流限制
  • 4kV静电放电(ESD)人体放电模式(HBM)
• I²C接口
• 运行温度范围： -40°C至85°C
• 6焊球晶圆级芯片(WCSP)封装，焊球间距0.4mm
• 最大芯片尺寸：0.8mm×1.48mm
• 封装高度：YFM：0.15mm；YMB：0.3mm

• 手机自动调焦
• 数码相机自动对焦虹膜和曝光控制
• 监控摄像机
• 网络和PC摄像机传动器控制