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
8.2.2.1 Distinguishing of Different Fault Modes
Some applications require that open load, short to battery, and short to GND can be distinguished from each other. This requires two steps:
- In the on-state, for the current-sense version device (version B), on-state open load and short to battery are recognized as an extremely-low voltage level on the current-sense pin, whereas short to GND is reported as a pulled-up voltage VCS,h. Therefore, the user can find a short to GND (see Figure 46).
- If reported as an on-state open-load or short-to-battery fault in the first step, turn off the input signal. In the off-state, with an external pulldown resistor, open load and short to battery can be easily distinguished. When the output pulls down, the short to battery is still reported as an off-state fault condition, whereas the open load is ignored.
Figure 46. Step 1: Short-to-GND Detection in the On-State 
Figure 47. Step 2: Short-to-Battery Detection in the Off-State