ZHCSLA3A May 2020 – December 2020 LM7481-Q1
PRODUCTION DATA
- 1 特性
- 2 应用
- 3 说明
- 4 Revision History
- 5 Pin Configuration and Functions
- 6 Specifications
- 7 Parameter Measurement Information
- 8 Detailed Description
-
9 Application and Implementation
- 9.1 Application Information
- 9.2
Typical 12-V Reverse Battery Protection Application
- 9.2.1 Design Requirements for 12-V Battery Protection
- 9.2.2 Automotive Reverse Battery Protection
- 9.2.3 Input Transient Protection: ISO 7637-2 Pulse 1
- 9.2.4 AC Super Imposed Input Rectification: ISO 16750-2 and LV124 E-06
- 9.2.5 Input Micro-Short Protection: LV124 E-10
- 9.2.6 Detailed Design Procedure
- 9.2.7 MOSFET Selection: Blocking MOSFET Q1
- 9.2.8 MOSFET Selection: Hot-Swap MOSFET Q2
- 9.2.9 TVS selection
- 9.2.10 Application Curves
- 9.3 Do's and Don'ts
- 10Power Supply Recommendations
- 11Layout
- 12Device and Documentation Support
- 13Mechanical, Packaging, and Orderable Information
8.3.3 Over Voltage Protection and Battery Voltage sensing (VSNS, SW, OV)
Connect a resistor ladder as shown in Figure 8-5 for Over Voltage threshold programming.
Figure 8-5 Programming Over Voltage Threshold and Battery SensingA disconnect switch is integrated between VSNS and SW pins. This switch is turned OFF when EN/UVLO pin is pulled low. This helps to reduce the leakage current through the resistor divider network during system shutdown state (IGN_OFF state).