DRV8251A
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N-channel H-bridge brushed DC motor driver
- 4.5-V to 48-V operating supply voltage range
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Pin-to-pin, RDS(on), voltage, and current sense/regulation variants (external shunt resistor and integrated current mirror)
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DRV8870: 6.5-V to 45-V, 565-mΩ, shunt
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DRV8251: 4.5-V to 48-V, 450-mΩ, shunt
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DRV8251A: 4.5-V to 48-V, 450-mΩ, mirror
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DRV8231: 4.5-V to 33-V, 600-mΩ, shunt
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DRV8231A: 4.5-V to 33-V, 600-mΩ, mirror
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- High output current capability: 4.1-A Peak
- PWM control interface
- Supports 1.8-V, 3.3-V, and 5-V logic inputs
- Integrated IPROPI current sensing for stall detection and current regulation
- Low-power sleep mode
- <1-µA at VVM = 24-V, TJ = 25°C
- Small package and footprint
- 8-Pin HSOP with PowerPAD™, 4.9 × 6.0 mm
- Integrated protection features
- VM undervoltage lockout (UVLO)
- Auto-retry overcurrent protection (OCP)
- Thermal shutdown (TSD)
The DRV8251A device is an integrated motor driver with N-channel H-bridge, charge pump, current sense feedback, current regulation, and protection circuitry. The charge pump improves efficiency by supporting N-channel MOSFET half bridges and 100% duty cycle driving.
An internal current mirror architecture on the IPROPI pin implements current sensing and regulation. This eliminates the need for a large power shunt resistor, saving board area and reducing system cost. The IPROPI current-sense output allows a microcontroller to detect motor stall or changes in load conditions. The external voltage reference pin, VREF, determines the threshold of current regulation during start-up and stall events without interaction from a microcontroller.
A low-power sleep mode achieves ultra-low quiescent current draw by shutting down most of the internal circuitry. Internal protection features include supply undervoltage lockout, output overcurrent, and device overtemperature.
The DRV8251A is part of a family of devices which come in pin-to-pin, scalable RDS(on) and supply voltage options to support various loads and supply rails with minimal design changes. See Section 5 for information on the devices in this family. View the full portfolio of brushed motor drivers on ti.com.
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技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | DRV8251A 4.1-A Brushed DC Motor Driver with Integrated Current Sense and Regulation datasheet | PDF | HTML | 2020年 8月 21日 |
| Certificate | DRV8251AEVM EU RoHS Declaration of Comformity (DoC) | 2021年 11月 9日 | ||
| User guide | DRV8251 Evaluation Module User's Guide | 2021年 5月 25日 | ||
| Technical article | Using brushed motors to improve battery life and reliability in vacuum robots | PDF | HTML | 2019年 7月 17日 |
設計與開發
如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。
DRV8251AEVM — DRV8251A 馬達驅動器評估模組
DRV8251A 評估模組 (EVM) 可用於輕鬆評估 DRV8251A 裝置。EVM 已編程並配置為可立即使用並開始轉動馬達。
DRV8251A 是額定電壓為 4.5V 至 48-V 的單全橋驅動器，可驅動高達 3.7 A 電流。EVM 可輕鬆控制 DRV8251A 且無需滿足 GUI 的需求。EVM 配備兩個電位計，可調整控制訊號佔空比。如有需要，可中斷板載 MCU 連接，以透過外部控制器控制 DRV8251A。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| HSOIC (DDA) | 8 | Ultra Librarian |
訂購與品質
- RoHS
- REACH
- 產品標記
- 鉛塗層/球物料
- MSL 等級/回焊峰值
- MTBF/FIT 估算值
- 材料內容
- 認證摘要
- 進行中持續性的可靠性監測
- 晶圓廠位置
- 組裝地點
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。