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
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DRV8251AEVM — DRV8251A 馬達驅動器評估模組
The DRV8251A evaluation module (EVM) allows for easy evaluation of the DRV8251A device. The EVM has been programmed and configured to work out of the box and begin spinning motors right away.
The DRV8251A is a 4.5V to 48-V rated single H-bridge driver capable of driving up to 3.7 A. The EVM allows (...)
| 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。