ZHCSLY9A October 2020 – December 2020 LM7310
PRODUCTION DATA
- 1 特性
- 2 应用
- 3 说明
- 4 Revision History
- 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 Input Reverse Polarity Protection
- 7.3.2 Undervoltage Protection (UVLO & UVP)
- 7.3.3 Overvoltage Lockout (OVLO)
- 7.3.4 Inrush Current control and Fast-trip
- 7.3.5 Analog Load Current Monitor Output
- 7.3.6 Reverse Current Protection
- 7.3.7 Overtemperature Protection (OTP)
- 7.3.8 Fault Response
- 7.3.9 Power Good Indication (PG)
- 7.4 Device Functional Modes
- 8 Application and Implementation
- 9 Power Supply Recommendations
- 10Layout
- 11Device and Documentation Support
- 12Mechanical, Packaging, and Orderable Information
7.3.4.2 Fast-Trip During Steady State
During certain system faults, the current through the device can increase very rapidly. In such events, the device provides fast-trip response with a fixed threshold (IFT) during steady state. Once the current exceeds IFT, the HFET is turned off completely within tFT. Thereafter, the device remains latched-off until it's power cycled or re-enabled by toggling the EN/UVLO pin.
Figure 7-4 LM73100 Fast-Trip ResponseThe LM73100 fast-trip response is active only during steady state and offers one level of fast response to severe overcurrents of transient nature. However, for systems which may experience persistent faults such as short-circuits or overloads, it's recommended to use an additional level of overcurrent protection in series for safety.