DRV8849
- Dual stepper motor driver
- STEP/DIR interface
- Up to 1/256 microstepping indexer
- 4.5 to 38-V Operating supply voltage range
- 900 mΩ HS + LS RDS(ON) at 24 V, 25°C
- 1.5 A full-scale, 1.1 A rms current per H-bridge
- Integrated current sense functionality
- ±5% full-scale current accuracy
- No sense resistors required
- Smart tune decay technology
- Configurable off-time PWM chopping in Smart tune
- 8-µs, 16-µs, or 32-µs
- Supports 3.3-V, 5.0-V logic inputs
- Low-current sleep mode (1.3 µA)
- Protection features for each Stepper
- VM undervoltage lockout (UVLO)
- Charge pump undervoltage (CPUV)
- Overcurrent protection (OCP)
- Thermal shutdown (OTSD)
- Fault condition output (nFAULT)
The DRV8849 is a dual stepper motor driver for industrial and consumer applications. The device is fully integrated with four N-channel power MOSFET H-bridge drivers, one microstepping indexer for each stepper, and integrated current sensing. The DRV8849 is capable of driving up to 1.5-A full-scale output current (dependent on PCB design).
The DRV8849 uses an internal current sense architecture to eliminate the need for four external power sense resistors, saving PCB area and system cost. The device uses an internal PWM current regulation scheme with smart tune decay mode. Smart tune automatically adjusts for desired current regulation, compensates for motor variation and aging effects and reduces audible noise and vibration from the motor.
Simple STEP/DIR interfaces allow an external controller to manage the direction and step rate of the stepper motors. The device can be configured in full-step to 1/256 microstepping. A low-power sleep mode is provided using a dedicated nSLEEP pin. Protection features are provided for supply undervoltage, charge pump faults, overcurrent, short circuits, and overtemperature. Fault conditions are indicated by one nFAULT pin for each stepper.
技術資料
| 上位の文書 | タイプ | タイトル | フォーマットオプション | 最新の英語版をダウンロード | 日付 | |
|---|---|---|---|---|---|---|
| * | データシート | DRV8849: 38 V, 1.5 A Dual Stepper Driver with Integrated Current Sense, 1/256 Microstepping, STEP/DIR Interface and Smart Tune データシート (Rev. A) | PDF | HTML | 2023/07/13 | ||
| 製品概要 | Brushed and Stepper Motor Drivers in Video Surveillance | PDF | HTML | 2024/02/22 | |||
| 製品概要 | Two New Dual-Stepper Motor Drivers | PDF | HTML | 2024/02/22 | |||
| 証明書 | DRV8849EVM EU RoHS Declaration of Conformity (DoC) | 2023/03/28 |
設計と開発
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DRV8849EVM — DRV8849 スマート チューン機能搭載、電流センス機能内蔵、デュアル ステッパ モーター ドライバの評価基板
| パッケージ | ピン数 | CAD シンボル、フットプリント、および 3D モデル |
|---|---|---|
| VQFN (RHH) | 36 | Ultra Librarian |
購入と品質
推奨製品には、この TI 製品に関連するパラメータ、評価基板、またはリファレンス デザインが存在する可能性があります。