ZHCSER7C October 2015 – November 2018 DRV8885
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
- 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(shù)據(jù) (封裝 | 引腳)
散熱焊盤機械數(shù)據(jù) (封裝 | 引腳)
訂購信息
7.3.6 Decay Modes
The DRV8885 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 the chart below. 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