ZHCSDD8D October 2014 – December 2019 TPS1H100-Q1
PRODUCTION DATA.
- 1 特性
- 2 应用
- 3 说明
- 4 修订历史记录
- 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 Accurate Current Sense
- 7.3.2 Programmable Current Limit
- 7.3.3 Inductive-Load Switching-Off Clamp
- 7.3.4
Full Protections and Diagnostics
- 7.3.4.1 Short-to-GND and Overload Detection
- 7.3.4.2 Open-Load Detection
- 7.3.4.3 Short-to-Battery Detection
- 7.3.4.4 Reverse-Polarity Detection
- 7.3.4.5 Thermal Protection Behavior
- 7.3.4.6 UVLO Protection
- 7.3.4.7 Loss of GND Protection
- 7.3.4.8 Loss of Power Supply Protection
- 7.3.4.9 Reverse Current Protection
- 7.3.4.10 Protection for MCU I/Os
- 7.3.5 Diagnostic Enable Function
- 7.4 Device Functional Modes
- 8 Application and Implementation
- 9 Power Supply Recommendations
- 10Layout
- 11器件和文档支持
- 12机械、封装和可订购信息
8.2.2 Detailed Design Procedure
The RCS, VCS linear region is from 0 to 4 V. To keep the 2-A nominal current in the 0- to 3-V range, calculate the RCS as in Equation 11. To achieve better current sense accuracy, a 1% accuracy or better resistor is preferred.
Equation 11. 
RCL, VCL,th is the current-limit internal threshold, 1.233 V. To set the programmable current limit value at 5 A, calculate the RCL as in Equation 12.
Equation 12. 
TI recommends RSER = 10 kΩ for 5-V MCU.
TI recommends a 1-kΩ resistor and 200-V, 0.2-A diode for the GND network.