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
8.2.2.2 Current Regulation
In a stepper motor, the full-scale current (IFS) is the maximum current driven through either winding. This quantity will depend on the RREF resistor and the TRQ setting. During stepping, IFS defines the current chopping threshold (ITRIP) for the maximum current step.
Equation 5. 
Note that IFS must also follow Equation 6 in order to avoid saturating the motor. VM is the motor supply voltage, and RL is the motor winding resistance.
Equation 6. 