DRV8846 - 双通道 H 桥步进电机驱动器

DRV8846是TI德州仪器公司的一款集成FET的步进栅极驱动器产品，DRV8846是双通道 H 桥步进电机驱动器，本站介绍了DRV8846的封装应用图解、特点和优点、功能等，并给出了与DRV8846相关的TI元器件型号供参考。

DRV8846 - 双通道 H 桥步进电机驱动器 - 集成FET的步进栅极驱动器 - 步进驱动器 - 德州仪器

产品特性

PWM Microstepping Motor Driver
- Built-In Microstepping Indexer
- Up to 1/32 Microstepping
- Step/Direction Control
Multiple Decay Modes
- Adaptive Decay
- Mixed Decay
- Slow Decay
- Fast Decay
Configurable Off-Time PWM Chopping
- 10-, 20-, or 30-μs Off-Time
Adaptive Blanking Time for Smooth Stepping
4- to 18-V Operating Supply Voltage Range
1-A Continuous/RMS Output Current per H-Bridge (at 25°C)
Low-Current Sleep Mode
3-Bit Torque DAC to Scale Motor Current
Thermally Enhanced Surface Mount Package
Protection Features
- VM Undervoltage Lockout (UVLO)
- Overcurrent Protection (OCP)
- Thermal Shutdown (TSD)
- Fault Condition Indication Pin (nFAULT)

产品应用

Printers
Scanners
Video Security Cameras
Projectors

产品说明

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 N-channel and P-channel power MOSFETs configured as full H-bridges to drive the motor windings. The DRV8846 is capable of driving up to 1-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 adaptive decay, slow decay, fast decay, and mixed decay can be used. The PWM current chopping off-time can also be selected. A low-power 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.

Internal protection functions are provided for UVLO, overcurrent protection, short circuit protection, and overtemperature. Fault conditions are indicated via a nFAULT pin.

产品器件信息

PART NUMBER	PACKAGE	BODY SIZE (NOM)
DRV8846	QFN (24)	4.00 × 4.00 mm

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