DRV8234
- N-channel H-bridge brushed DC motor driver
- 4.5-V to 38-V operating supply voltage range
- Ripple counting feature for:
- On-chip Speed and Position detection
- Integrated Voltage and Speed regulation
- Soft-Start and Stop feature for inrush current protection
- 600-mΩ RDS(on) (High-Side + Low-Side)
- High output current capability: 3.7-A Peak, 2-A RMS
- PWM with I2C control interface
- Configuration and diagnostics on I2C registers
- Multi-follower operation support
- Supports standard and fast I2C mode
- Supports 3.3-V, and 5-V logic inputs
- Integrated current sensing and current regulation
- Analog current sense output (IPROPI)
- Internal charge pump with 100% duty cycle
- Long battery life with low-power sleep mode
- < 1 µA maximum sleep current
- Small package and footprint
- 16-Pin WQFN with PowerPAD™, 3 × 3 mm
- Integrated protection features
- VM undervoltage lockout (UVLO)
- Overcurrent protection (OCP)
- Thermal shutdown (TSD)
- Stall detection
- Overvoltage protection (OVP)
The DRV8234 is a high-performance integrated H-bridge motor driver with integrated speed and position detection using ripple counting along with additional features like motor speed and voltage regulation, stall detection, current sense output, current regulation, and protection circuitry.
The integrated ripple counting algorithm counts the number of ripples in the motor current to determine motor relative position and speed eliminating the potential need for encoders, hall sensors, or optical sensors. This reduces board space and design complexity, and saves on overall system cost. Integrated speed regulation is used to maintain constant motor speed over varying input supply voltages which minimizes current consumption and saves power over time. This is critical in applications that have different loading conditions or rely on battery power for operation where the input voltage is not constant. Soft-start and stop allows for a controlled turn-on and turn-off time, reducing large inrush currents to protect the motor windings from damage, thereby increasing system reliability and longevity.
An internal current mirror 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. Using the VREF pin, this device can regulate the motor current during startup and high-load events without interaction from a microcontroller. The device supports sensorless motor stall detection and reporting to microcontroller.
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技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | DRV8234 2-A Brushed DC Motor Driver with Ripple Counting, Stall Detection, and Speed Regulation datasheet | PDF | HTML | 2022年 8月 30日 |
| Application note | Solving Sensorless Brushed DC Motor Speed and Position Control Using Ripple Counting (Rev. A) | PDF | HTML | 2024年 5月 29日 | |
| EVM User's guide | DRV821x and DRV823x Evaluation Module User's Guide (Rev. A) | PDF | HTML | 2024年 4月 3日 | |
| Application brief | Sensorless Position Control For Brushed DC Motors | PDF | HTML | 2024年 2月 2日 | |
| Certificate | DRV8234EVM EU Declaration of Conformity (DoC) | 2023年 9月 19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)。
DRV8234EVM — 適用於具有熄火偵測與漣波計數之有刷 DC 馬達驅動器的 DRV8234 評估模組
DRV8234 評估模組 (EVM) 可用於輕鬆評估 DRV8234 產品。EVM 已編程並配置為可立即使用並開始轉動馬達。
DRV8234 是一款具備 N 通道 H 橋、充電泵、電流感測輸出、電流調節和保護電路的整合式馬達驅動器。DRV8234 整合漣波計數技術，可進行無感測器馬達位置監控、熄火偵測，以及速度和電壓調節。電荷泵整合了所有電容器，並允許 100% 工作週期運作。EVM 附帶 GUI 以輕鬆控制馬達驅動器。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| WQFN (RTE) | 16 | 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。