DRV8434S
- PWM Microstepping Stepper Motor Driver
- SPI Interface with STEP/DIR pins
- Up to 1/256 Microstepping Indexer
- Integrated Current Sense Functionality
- No Sense Resistors Required
- ±4% Full-Scale Current Accuracy
- Smart tune, slow, and mixed decay options
- 4.5 to 48-V Operating Supply Voltage Range
- Low RDS(ON): 330 mΩ HS + LS at 24 V, 25°C
- High Current Capacity: 2.5 A Full-Scale, 1.8 A rms
- TRQ_DAC bits to scale full-scale current
- Configurable Off-Time PWM Chopping
- 7-µs, 16-µs, 24-µs, or 32-µs
- Supports 1.8 V, 3.3 V, 5.0 V Logic Inputs
- Daisy Chain support with SPI
- Low-Current Sleep Mode (2 µA)
- Spread spectrum clocking for low EMI
-
Small Package and Footprint
- Protection Features
- VM Undervoltage Lockout (UVLO)
- Charge Pump Undervoltage (CPUV)
- Overcurrent Protection (OCP)
- Sensorless stall detection
- Open Load Detection (OL)
- Overtemperature Warning (OTW)
- Thermal Shutdown (OTSD)
- Fault Condition Output (nFAULT)
The DRV8434S is a stepper motor driver for industrial and consumer applications. The device is fully integrated with two N-channel power MOSFET H-bridge drivers, a microstepping indexer, and integrated current sensing. The DRV8434S is capable of driving up to 2.5-A full-scale output current (dependent on PCB design).
The DRV8434S uses an internal current sense architecture to eliminate the need for two external power sense resistors, saving PCB area and system cost. The device uses an internal PWM current regulation scheme selectable between smart tune, slow and mixed decay options. Smart tune automatically adjusts for optimal current regulation and reduces audible noise from the motor.
A simple SPI interface with STEP/DIR pins allows an external controller to manage the direction and step rate of the stepper motor. The device can be configured in full-step to 1/256 microstepping. With advanced stall detection algorithm, designers can detect if the motor stopped and take action as needed. The device also includes an integrated torque DAC which allows scaling the output current through SPI without needing to scale the VREF reference. Other protection features are provided for supply undervoltage, charge pump faults, overcurrent, short circuits, open load, and overtemperature. Fault conditions are indicated by the nFAULT pin.
A low-power sleep mode is provided for very low standby current using an nSLEEP pin. The device features full duplex, 4-wire synchronous SPI communication, with daisy chain support for up to 63 devices connected in series, for configurability and detailed fault reporting.
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技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | DRV8434S Stepper Driver With Integrated Current Sense, 1/256 Microstepping, SPI Interface, Smart Tune Technology and Stall Detection datasheet | PDF | HTML | 2020年 12月 7日 |
| Application note | How to Improve Motion Smoothness and Accuracy of Stepper Motors (Rev. A) | PDF | HTML | 2021年 10月 11日 | |
| Certificate | DRV8434SEVM EU RoHS Declaration of Conformity (DoC) | 2020年 12月 7日 | ||
| User guide | DRV8434SEVM GUI User's Guide | 2020年 11月 25日 | ||
| EVM User's guide | DRV8434SEVM User's Guide | 2020年 11月 25日 | ||
| Application note | How to Reduce Audible Noise in Stepper Motors | PDF | HTML | 2020年 4月 21日 | |
| Application note | Sensorless Stall Detection With the DRV8889-Q1 | 2020年 1月 10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)。
DRV8434SEVM — 具熄火偵測和 SPI 介面評估模組的 DRV8434S 步進驅動器
The DRV8434S evaluation module (EVM) allows easy evaluation of the DRV8434S device.
The DRV8434S is a fully integrated stepper motor driver, supporting up to 2.5 A full scale current with an internal microstepping indexer, smart tune decay technology, advanced stall detection algorithm, and (...)
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| HTSSOP (PWP) | 28 | Ultra Librarian |
| VQFN (RGE) | 24 | 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。