Temperature-Feedback Charging Circuit for Transistor Heat Control
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Solution Overview
Problem
Existing power supply units, such as those described in JP-A-2018-072498, fail to accelerate charging of loads due to shunting output current into a different load side, leading to inefficiencies in transistor heat management and charging speed.
Innovation Solution
A circuit device with a control circuit that adjusts transistor current based on detected temperature, reducing current when temperatures exceed a threshold to prevent overheating and increasing current when temperatures are lower to optimize charging and discharging efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the output current of the first power supply is shunted into a different load side, then heat generation of the field effect transistor is reduced, but charging speed of the load to which the first voltage is supplied is decreased
Solution Approach 1:
The patent implements dynamic control of transistor current based on real-time temperature detection. The control circuit adjusts the current flowing through the field effect transistor according to detected temperature values, optimizing both heat management and charging speed by adapting operational parameters to current thermal conditions rather than using a fixed current shunting approach
Solution Approach 2:
The patent changes the operational parameters of the field effect transistor dynamically by adjusting current levels based on temperature thresholds. When temperature exceeds predetermined thresholds, the control circuit modifies the transistor's current conduction characteristics, thereby controlling heat generation while maintaining efficient charging operation
2Speed
If transistor current is increased to accelerate charging, then charging speed is improved, but heat generation of the transistor increases
Solution Approach 1:
The patent employs a feedback control mechanism where the temperature sensor circuit continuously monitors the field effect transistor temperature and feeds this information back to the control circuit. Based on this feedback, the control circuit dynamically adjusts the transistor current to maintain optimal charging speed while preventing excessive heat generation, resolving the contradiction between speed and temperature
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively protects transistors from overheating while allowing for maximum charging and discharging capacity within safe temperature ranges, ensuring efficient power delivery to loads.
Implementation Method 1
a temperature sensor circuit that detects a temperature of the transistor
Implementation Method 2
a transistor that charges a load to which a power supply voltage is supplied
Data Source
AI summary
A circuit device includes a control circuit configured to control a transistor current based on a detected temperature. The detected temperature is a temperature detected by a temperature sensor circuit that detects a temperature of a transistor. The transistor charges a load to which a power supply voltage is supplied. The transistor current is a current flowing through the transistor during charging. The control circuit reduces the transistor current when the detected temperature is higher than a first threshold value, and increases the transistor current when the detected temperature is lower than a second threshold value lower than the first threshold value.