DRV8846
- PWM Microstepping Motor Driver
- Built-In Microstepping Indexer
- Up to 1/32 Microstepping
- Step/Direction Control
- Multiple Decay Modes
- Smart tune Technology
- 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
- 1.4-A (Full Scale (Max Drive) 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)
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 1.4-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 smart tune, 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.
技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | DRV8846 Dual H-Bridge Stepper Motor Driver datasheet (Rev. A) | PDF | HTML | 2017/3/27 | ||
| 應用說明 | Best Practices for Board Layout of Motor Drivers (Rev. B) | PDF | HTML | 2021/10/14 | |||
| 應用說明 | Methods to Configure Current Regulation for Brushed and Stepper Motors (Rev. B) | PDF | HTML | 2021/1/19 | |||
| 白皮書 | How smart tune regulates current in stepper motors (Rev. A) | 2019/3/19 | ||||
| Application brief | Smart Tuning for Efficient Stepper Driving | 2018/11/20 | ||||
| Application brief | Small Motors in Large Appliances | 2018/7/20 | ||||
| 技術文章 | Spin your stepper automatically | PDF | HTML | 2016/3/3 | |||
| 更多文件說明 | TM4C123x Stepper Motor Control Product Summary | 2015/7/6 |
設計與開發
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DRV8846EVM — DRV8846 雙 H 橋步進馬達驅動器評估模組
DRV8846 是一個高度整合的步進馬達控制器和驅動器，適用於相機、印表機、投影機及其他自動化設備應用。此裝置已經過最佳化，可透過晶片內建索引器驅動微型步進為 1/32 的單一雙極步進器。
DRV8846EVM 是一個以 DRV8846 為核心的評估平台。此 EVM 整合了 MSP430 微控制器和 USB 介面晶片。USB 晶片允許從使用 Windows® 應用程式排程序列命令的 PC 電腦進行序列通訊。這些命令可用於控制每個裝置的訊號，並以所需速率發出步進命令來驅動步進馬達。微控制器韌體使用內部索引模式運作。
TIDA-00405 — 3D 列印機控制器 (12V)
此設計是一個完整的系統，用於控制基於單一擠壓機的 3 軸 3D 列印機。該系統由 MSP430F5529 LaunchPad 管理，並利用 DRV8846 進行精密步進馬達控制。CSD18534Q5A 用作加熱床加熱器、擠壓機加熱器和冷卻風扇的低壓側開關。DRV5033 霍爾感測器充當非接觸式限位開關。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| VQFN (RGE) | 24 | Ultra Librarian |
訂購與品質
建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。