ZHCSG01C February 2017 – August 2018 DRV8320 , DRV8320R , DRV8323 , DRV8323R
PRODUCTION DATA.
- 1 特性
- 2 應用
- 3 說明
- 4 修訂歷史記錄
- 5 Device Comparison Table
- 6 Pin Configuration and Functions
- 7 Specifications
-
8 Detailed Description
- 8.1 Overview
- 8.2 Functional Block Diagram
- 8.3
Feature Description
- 8.3.1 Three Phase Smart Gate Drivers
- 8.3.2 DVDD Linear Voltage Regulator
- 8.3.3 Pin Diagrams
- 8.3.4 Low-Side Current Sense Amplifiers (DRV8323 and DRV8323R Only)
- 8.3.5 Step-Down Buck Regulator
- 8.3.6 Gate Driver Protective Circuits
- 8.4 Device Functional Modes
- 8.5 Programming
- 8.6
Register Maps
- Table 1. DRV832xS and DRV832xRS Register Map
- 8.6.1 Status Registers
- 8.6.2 Control Registers
-
9 Application and Implementation
- 9.1 Application Information
- 9.2
Typical Application
- 9.2.1
Primary Application
- 9.2.1.1 Design Requirements
- 9.2.1.2 Detailed Design Procedure
- 9.2.1.3 Application Curves
- 9.2.2 Alternative Application
- 9.2.1
Primary Application
- 10Power Supply Recommendations
- 11Layout
- 12器件和文檔支持
- 13機械、封裝和可訂購信息
9.2.2.2.1 Sense Amplifier Unidirectional Configuration
The sense amplifiers are configured to be unidirectional through the registers on SPI devices by writing a 0 to the VREF_DIV bit.
The sense amplifier gain and sense resistor values are selected based on the target current range, VREF, power rating of the sense resistor, and operating temperature range. In unidirectional operation of the sense amplifier, use Equation 24 to calculate the approximate value of the dynamic range at the output.
Use Equation 25 to calculate the approximate value of the selected sense resistor.
where
From Equation 24 and Equation 25, select a target gain setting based on the power rating of a target sense resistor.