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产品信息
DRV8846RGER
The DRV8846 provides a highly-integrated stepper motor driver for cameras, printers, projectors, and other automated equipment applications.
The device has two H-bridges and a microstepping indexer and is intended to drive a bipolar stepper motor. The output block of each H-bridge driver consists of Nchannel and P-channel power MOSFETs configured as full H-bridges to drive the motor windings.The DRV8846 is capable of driving up to 1.4-A full-scale output current (with proper heatsinking and TA =25°C).
A simple STEP/DIR interface allows easy interfacing to controller circuits. Pins allow configuration of the motor
in full-step up to 1/32-step modes. Decay mode is configurable so that AutoTune, slow decay, fast decay, and
mixed decay can be used. The PWM current chopping off-time can also be selected. A lowpower sleep mode is
provided which shuts down internal circuitry to achieve very-low quiescent current draw. This sleep mode can
be set using a dedicated nSLEEP pin.
DRV8846为相机、打印机、投影仪和其他自动化设备应用提供高度集成的步进电机驱动器。该装置有两个H桥和一个微步分度器，用于驱动双极步进电机。每个H桥驱动器的输出块由N通道和P通道功率
MOSFET组成，配置为全H桥以驱动电机绕组。
DRV8846能够驱动高达1.4-A的满标度输出电流（具有适当的散热和TA=25°C）。
一个简单的STEP/DIR接口可以方便地连接到控制器电路。引脚允许配置电机在全步高达1/32步模式。衰减模式
是可配置的，以便可以使用自动调谐、缓慢衰减、快速衰减和混合衰减。还可以选择PWM电流切断时间。提供
了一种低功耗休眠模式，可关闭内部电路以实现非常低的静态电流消耗。可使用专用nSLEEP引脚设置此睡眠模
式。