Semiconductor Switch Voltage Regulation for Power Short Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing semiconductor switch technologies fail to detect power short conditions effectively, particularly in the context of power distribution systems, where the semiconductor switch device is proposed related to a semiconductor switch device that cuts off the power supply and performs a protective operation when an abnormality occurs between a power supply and a load device using power supplied from the power supply via a wiring harness.
Innovation Solution
A semiconductor switch device with a main switch, driver, controller, power short detector, and diagnostic circuit that detects and diagnoses power short conditions effectively, particularly in the context of power distribution systems, where the driver outputs a lower voltage to maintain the main switch in a constant voltage regulation state during power short detection, allowing detection without interrupting the power supply to the load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the driver outputs normal operation voltage to the main switch, then the main switch operates normally with full power transmission, but power short detection cannot be performed without interrupting power supply
Solution Approach 1:
The driver dynamically changes its output voltage level based on the operational phase: during normal operation it outputs full voltage for complete power transmission, while during power short detection it outputs a reduced voltage level that maintains the main switch in a constant voltage regulation state. This dynamic voltage adjustment enables the system to perform detection functions without interrupting power supply to the load.
Solution Approach 2:
The driver changes the voltage parameter of its output signal to achieve different operational modes. By outputting a voltage lower than normal operation voltage during power short detection, the main switch enters a constant voltage regulation state where the output voltage becomes independent of the driver's input voltage variations, enabling safe detection while maintaining power supply.
2Reliability
If the main switch is turned off completely for power short detection, then power short can be detected by measuring voltage difference, but power supply to the load is interrupted
Solution Approach 1:
Instead of completely turning off the main switch for detection, the driver outputs a reduced voltage that partially activates the main switch to operate in a constant voltage regulation state. This partial action is sufficient to enable power short detection through voltage difference measurement while avoiding complete power interruption to the load.
3Adaptability or versatility
If the driver outputs variable voltage during detection, then power short detection flexibility is improved, but the main switch may not maintain stable voltage regulation state
Solution Approach 1:
The driver changes its output voltage parameter to a specific reduced level that triggers the main switch into a constant voltage regulation state. Once in this state, the output voltage becomes stable and independent of further driver voltage variations, thus maintaining both detection flexibility and voltage regulation stability simultaneously.
Data Source
AI summary
A semiconductor switch device according to one or more embodiments may include a main switch that switches power supplied from a power supply, a driver that outputs a voltage lower than that of normal operation so that the main switch is in a constant voltage regulation state in case of a power short detection operation, a controller that controls a normal operation or a power short detection operation of the driver, a power short detector that detects if an output voltage has a sufficient potential difference with respect to a power supply voltage in the case of the power short detection operation, and a diagnostic circuit that diagnoses the power short and outputs a diagnostic result in response to detecting that the output voltage does not have a sufficient potential difference with respect to the power supply voltage in the case of the power short detection operation of the driver.