DRV201AYMBRB

DRV201A 是一款用于摄像头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。DRV201A 有一个用于电流调节的集成感测电阻器，并且可通过I²C 对电流进行控制。 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。 DRV201A is intended for high performance autofocus in camera modules. It 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 DRV201A offers a higher level of performance than the DRV201 in two areas. First, the transition between PWM and linear modes is free of any resonance. This allows faster image capture after achieving focus in the PWM mode. The other performance enhancement is in the area of EMC performance. When operating in PWM mode, transitions were significantly slowed down resulting in lower conducted and radiated noise versus the DRV201. 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 regi

• 可针对线性或者脉宽调制(PWM) 模式音圈电机(VCM) 电流生成进行配置
• 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
• 开路和短路检测
• 欠压闭锁(UVLO)
• 过热保护
• 针对VCM 驱动器的内部电流限制
• 4kV 静电放电(ESD) 人体模型(HBM)
• I²C 接口
• 经改进的PWM 至线性模式稳定时间与DRV201 之间的关系
• 经改进的电磁兼容性(EMC) 性能与DRV201 间的关系
• 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：0.806mm x 1.49mm
• 最大封装高度：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