DRV8308
- Three-Phase Brushless DC Motor Controller
- Digital Closed-Loop Speed Control with Programmable Gain and Filters
- Drives 6 N-Channel MOSFETs With Configurable 10- to 130-mA Gate Drive
- Integrated Commutation from Hall Sensors
- Timing Can Be Advanced/Delayed
- 120° or 180°-Sinusoidal Current Control
- Single Input Controls Motor Speed
- Operating Supply Voltage 8.5 to 32 V
- Flexible Configuration Methods
- Read Internal Non-Volatile Memory
- Read External EEPROM
- Write SPI
- Configurable Motor Current Limiter
- 5-V Regulator for Hall Sensors
- Low-power Standby Mode
- Integrated Overcurrent, Overvoltage, and Overtemperature Protection
The DRV8308 controls sensored brushless DC motors with advanced features and a simple input interface. As a predriver, it drives the gates of 6 external N-Channel MOSFETs with a configurable current of 10mA to 130mA for optimal switching characteristics.
The 3 motor phases are commutated according to the Hall sensor inputs. Once the motor reaches a consistent speed, the DRV8308 uses just 1 Hall sensor to minimize jitter caused by sensor mismatch. The Hall signal-to-drive timing can be advanced or delayed in 0.1% increments to optimize power efficiency. An optional 180° commutation mode drives sinusoidal current through the motor and minimizes audible noise and torque ripple. Peak motor current can be controlled by sizing a sense resistor.
The DRV8308 achieves closed-loop speed control to spin motors to a precise RPM across a wide range of load torques. The system matches motor speed—generated from an FG trace or the Hall sensors—to the reference frequency on pin CLKIN. The DRV8308 can also drive motors open-loop using a duty cycle command, from either a clock or register setting.
An assortment of protection features bolster system robustness, as the DRV8308 handles and reports overcurrent, overvoltage, undervoltage, and overtemperature.
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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 | DRV8308 Brushless DC Motor Controller datasheet (Rev. B) | PDF | HTML | 2017/11/13 | ||
| 應用說明 | Best Practices for Board Layout of Motor Drivers (Rev. B) | PDF | HTML | 2021/10/14 | |||
| 應用說明 | Hardware Design Considerations for an Electric Bicycle using BLDC Motor (Rev. B) | 2021/6/23 | ||||
| 應用說明 | System Design Considerations for High-Power Motor Driver Applications | PDF | HTML | 2021/6/22 | |||
| 應用說明 | Understanding Smart Gate Drive (Rev. D) | 2021/3/1 | ||||
| 白皮書 | Power Electronics in Motor Drives: Where is it? (Rev. A) | 2019/10/1 | ||||
| 應用說明 | Hardware Design Considerations for an Efficient Vacuum Cleaner Using a BLDC Moto (Rev. B) | PDF | HTML | 2019/3/6 | |||
| 技術文章 | Simplifying gate driver design for brushed DC motors | PDF | HTML | 2015/6/30 |
設計與開發
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DRV8308EVM — 適用於三相無刷 DC 馬達預驅動器的 DRV8308 評估模組
三相無刷馬達預驅動器 DRV8308 可驅動感測到的無刷 DC 和無刷 AC (BLAC)，通常稱為永磁同步 (PMSM)。 這款可配置的預驅動器針對 12V 和 24V 馬達，具備整合式數位速度迴路，並支援進階換向時序與控制。
DRV8308EVM（評估模組）作為一款易於使用的評估套件，可讓使用者透過 Windows 圖形使用者介面控制 DRV8308 和馬達。該 EVM 採用高性能、電源效率且符合成本效益的平台，可加快開發速度並縮短上市時間。 應用包括泵、工業設備、點鈔機以及印表機。
隨附 TelcoMotion DT4260-24-055-04H-TI 馬達，其使用 TI (...)
SLVC552 — DRV8308 EVM Software
TIDA-00197 — 速度控制型 24V 無刷 DC 外轉機馬達參考設計
此先進馬達採用閉合迴路速度控制，可在負載扭矩分佈線中維持精確的 RPM。 磁性轉子位置是由 DRV5013 霍爾效應感測器感測，而 DRV8308 控制器決定何時驅動為線圈供電的 CSD88537ND FET。 不使用微控制器或韌體，而智慧正弦電流驅動可將聲音雜訊和扭矩漣波降到最低，進而將最大程度提升馬達性能。
如 APEC 上所見
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| VQFN (RHA) | 40 | Ultra Librarian |