ZHCSK76 September 2019 LM74202-Q1
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 Parameter Measurement Information
-
8 Detailed Description
- 8.1 Overview
- 8.2 Functional Block Diagram
- 8.3
Feature Description
- 8.3.1 Undervoltage Lockout (UVLO)
- 8.3.2 Overvoltage Protection (OVP)
- 8.3.3 Reverse Battery Protection
- 8.3.4 Hot Plug-In and In-Rush Current Control
- 8.3.5 Overload and Short Circuit Protection
- 8.4 Device Functional Modes
-
9 Application and Implementation
- 9.1 Application Information
- 9.2
Typical Application
- 9.2.1 Design Requirements
- 9.2.2 Detailed Design Procedure
- 9.2.3 Application Curves
- 10Power Supply Recommendations
- 11Layout
- 12器件和文檔支持
- 13機械、封裝和可訂購信息
8.3.3 Reverse Battery Protection
To protect the electronic systems from reverse battery voltage due to miswiring, often a power component like a schottky diode is added in series with the supply line as shown in Figure 25. These additional discretes result in a lossy and bulky protection solution. The LM74202-Q1 devices feature fully integrated reverse input supply protection and does not need an additional diode. These devices can withstand a reverse voltage of –40 V without damage. Figure 26 illustrates the reverse input polarity protection functionality.
Figure 25. Reverse Battery Protection Circuits - Discrete vs LM74202-Q1 
Figure 26. Reverse Input Supply Protection at –40 V