Driving Circuit Shunt Module for Power Management Heat Reduction
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Solution Overview
Problem
Large display panels with higher resolutions and refresh rates lead to increased power consumption, resulting in high operating temperatures that risk failure and shorten the service life of power management integrated chips in driving circuits.
Innovation Solution
A driving circuit design that includes a Schottky diode-based shunt module to divert current away from the second transistor, reducing heat generation and the risk of high-temperature failure, and incorporates a filter and feedback module to manage voltage and adjust control signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If synchronous rectification architecture with two transistors is adopted to reduce cost, then cost is reduced, but switching loss increases and heat generation increases
Solution Approach 1:
A body-diode-based current loop is introduced as an intermediary path to shunt current away from the second transistor during heavy load conditions. This current loop includes a body diode connected between the first node and ground terminal, providing an alternative current path that reduces the current burden on the second transistor and thereby reduces switching loss and heat generation while maintaining the cost-effective synchronous rectification architecture
2Ease of manufacture
If synchronous rectification architecture with two transistors is adopted to reduce cost, then cost is reduced, but heat generation increases
Solution Approach 1:
A body-diode-based current loop is introduced as an intermediary path to shunt current away from the second transistor during heavy load conditions. This current loop includes a body diode connected between the first node and ground terminal, providing an alternative current path that reduces the current burden on the second transistor and thereby reduces switching loss and heat generation while maintaining the cost-effective synchronous rectification architecture
3Manufacturing precision
If higher resolution and refresh rate are implemented to improve display quality, then display quality is improved, but power consumption increases
Solution Approach 1:
A feedback module is introduced to detect the output voltage at the second voltage terminal and generate feedback signals to adjust the control signals of the first and second transistors. This feedback mechanism ensures stable voltage regulation under varying load conditions, preventing excessive current flow and reducing power loss in the power management integrated chip, thereby maintaining display quality while optimizing power consumption
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 reduces heat generation and the risk of high-temperature failure, thereby increasing the service life of power management integrated chips in driving circuits.
Implementation Method 1
the shunt module includes a diode, and a positive terminal of the diode is electrically connected to the ground terminal, and a negative terminal of the diode is electrically connected to the first node; the diode is a Schottky diode
Implementation Method 2
an inductor, and a first terminal of which is electrically connected to the first node, and a second terminal of the inductor is electrically connected to a second voltage terminal
Implementation Method 3
the filter module includes a first capacitor and a second capacitor; a first terminal of the first capacitor is electrically connected to the first voltage terminal, and a second terminal of the first capacitor is electrically connected to the ground terminal
Data Source
AI summary
A driving circuit is provided and includes a first transistor electrically connected to a first control terminal, a first voltage terminal and a first node; and a second transistor electrically connected to a second control terminal, the first node and a ground terminal; and an inductor, a first terminal thereof is electrically connected to the first node, and a second terminal thereof is electrically connected to a second voltage terminal; and a shunt module electrically connected to the first node and the ground terminal, and the shunt module is configured to provide a current loop to shunt a current flowing through the second transistor.