DRV8845
- Integrates four H-bridges
- Can drive different configurations -
- Two stepper motors
- Four brushed-DC motors
-
Three brushed-DC motors
- One stepper and two brushed-DC motors
-
One stepper and one brushed-DC motor
- Footprint and software compatible with similar drivers from other vendors
- 4.5-V to 38-V Operating supply voltage range
- Low RDS(ON): 900 mΩ HS + LS at 24 V, 25°C
- 1.5-A full-scale current Per Bridge
- Industry standard PHASE/Ixx Interface
-
Synchronous rectification
-
Full, 1/2 and 1/4 step operation for stepper motors
-
Forward, reverse and coast modes for DC motors
-
Smart tune decay for smooth and quiet operation
-
Supports 3.3 V and 5 V logic inputs
-
Protection features
- VM undervoltage lockout (UVLO)
- Charge pump undervoltage (CPUV)
- Overcurrent protection (OCP)
- Thermal shutdown (OTSD)
The DRV8845 is a quad full-bridge driver for a wide variety of industrial applications. The device can be used for driving up to two stepper motors or up to four brushed-DC motors. Each full-bridge output is rated up to 1.5 A and 38 V. The DRV8845 includes pulse width modulation (PWM) current regulators, along with 2- bit nonlinear DACs (digital-to-analog converters) that allow stepper motors to be controlled in full, half, and quarter steps; and DC motors in forward, reverse, and coast modes.
The PWM current regulator uses the smart tune decay mode for motor audible noise and vibration reduction, increased accuracy, and reduced power dissipation. Internal synchronous rectification control circuitry is provided to improve power dissipation during PWM operation.
Protection features include thermal shutdown with hysteresis (OTSD), undervoltage lockout (UVLO) and overcurrent protection (OCP). Special power up sequencing is not required.
The DRV8845 is supplied in a 6 mm x 6 mm, 36 pin QFN package with exposed pad for enhanced thermal performance.
技術文件
類型 | 標題 | 日期 | ||
---|---|---|---|---|
* | Data sheet | DRV8845: 38 V, 1.5 A Quad H-Bridge Motor Driver with Smart Tune Technology datasheet (Rev. A) | PDF | HTML | 2023年 12月 21日 |
Product overview | Brushed and Stepper Motor Drivers in Video Surveillance | PDF | HTML | 2024年 2月 22日 | |
Product overview | Two New Dual-Stepper Motor Drivers | PDF | HTML | 2024年 2月 22日 | |
Certificate | DRV8845EVM EU RoHS Declaration of Conformity (DoC) | 2023年 3月 28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)。
DRV8845EVM — 適用於具有智慧調諧技術的四路全橋馬達驅動器的 DRV8845 評估模組
封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
---|---|---|
VQFN (RHH) | 36 | 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。