ZHCSEP5D January 2016 – November 2018 DRV8884
PRODUCTION DATA.
- 1 特性
- 2 應用
- 3 說明
- 4 修訂歷史記錄
- 5 Pin Configuration and Functions
- 6 Specifications
-
7 Detailed Description
- 7.1 Overview
- 7.2 Functional Block Diagram
- 7.3
Feature Description
- 7.3.1 Stepper Motor Driver Current Ratings
- 7.3.2 PWM Motor Drivers
- 7.3.3 Microstepping Indexer
- 7.3.4 Current Regulation
- 7.3.5 Controlling RREF With an MCU DAC
- 7.3.6 Decay Modes
- 7.3.7 Blanking Time
- 7.3.8 Charge Pump
- 7.3.9 LDO Voltage Regulator
- 7.3.10 Logic and Multi-Level Pin Diagrams
- 7.3.11 Protection Circuits
- 7.4 Device Functional Modes
- 8 Application and Implementation
- 9 Power Supply Recommendations
- 10Layout
- 11器件和文檔支持
- 12機械、封裝和可訂購信息
封裝選項
機械數據 (封裝 | 引腳)
散熱焊盤機械數據 (封裝 | 引腳)
訂購信息
7.3.6 Decay Modes
The DRV8884 decay mode is selected by setting the quad-level DECAY pin to the voltage range in Table 6.
Table 6. Decay Mode Settings
| DECAY | INCREASING STEPS | DECREASING STEPS |
|---|---|---|
| 100 mV
Can be tied to ground |
Slow decay | Mixed decay: 30% fast |
| 300 mV, 15 kΩ to GND | Mixed decay: 30% fast | Mixed decay: 30% fast |
| 1.0 V, 45 kΩ to GND | Mixed decay: 60% fast | Mixed decay: 60% fast |
| 2.9 V
Can be tied to DVDD |
Slow decay | Slow decay |
Increasing and decreasing current are defined in Figure 17. For the slow/mixed decay mode, the decay mode is set as slow during increasing current steps and mixed decay during decreasing current steps. In full-step mode, the decreasing steps decay mode is always used.
Figure 17. Definition of Increasing and Decreasing Steps