ZHCSMM1C April 2023 – February 2024 TPS274C65
PRODUCTION DATA
- 1
- 1 特性
- 2 应用
- 3 说明
- 4 Device Comparison Table
- 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 Pin Diagrams
- 8.3.2 SPI Mode Operation
- 8.3.3 Programmable Current Limit
- 8.3.4 DO_EN Feature
- 8.3.5
Protection Mechanisms
- 8.3.5.1 Overcurrent Protection
- 8.3.5.2 Short Circuit Protection
- 8.3.5.3 Inductive-Load Switching-Off Clamp
- 8.3.5.4 Inductive Load Demagnetization
- 8.3.5.5 Thermal Shutdown
- 8.3.5.6 Undervoltage protection on VS
- 8.3.5.7 Undervoltage Lockout on Low Voltage Supply (VDD_UVLO)
- 8.3.5.8 Power-Up and Power-Down Behavior
- 8.3.5.9 Reverse Current Blocking
- 8.3.6 Diagnostic Mechanisms
- 8.3.7 LED Driver
- 8.4 Device Functional Modes
- 8.5 TPS274C65BS Available Registers List
- 8.6 TPS274C65 Registers
- 9 Application and Implementation
- 10Device and Documentation Support
- 11Revision History
- 12Mechanical, Packaging, and Orderable Information
8.3.5.1 Overcurrent Protection
When IOUT reaches the current limit threshold, ICL, the device will register an overcurrent fault and begin regulating the current at the set limit. When any switch is in the FAULT state it will be indicated on the FLT pin. This protects the system against overload cases where the load attempts to draw more than it's max rated current, so the TPS274C65 can recognize and limit current or shut off during these cases. In the case of a slow overload with the device channel enabled for a while, the current limit levels are as shown in Figure 8-19.
Figure 8-19 Overload Response
Figure 8-20 Overcurrent BehaviorFor more details on the current limiting functionality, please see Programmable Current Limit.