Parallel Switching Circuit Without External Negative Power Supply
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Solution Overview
Problem
Existing semiconductor technologies require a separate external negative power supply, which is expensive and occupies significant space.
Innovation Solution
A semiconductor apparatus with a first and second switching element connected in parallel, driven by a drive circuit using the GND terminal potential, and a resistor or coil connected between the switching elements to raise the gate voltage without an external negative power supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If an external negative power supply is provided to maintain negative power supply, then the gate voltage of the switching element can be raised, but the cost and space requirements increase
Solution Approach 1:
The patent merges the negative power supply function into the existing power supply circuit by connecting the emitter of the first switching element to the negative terminal of the power supply. This eliminates the need for a separate external negative power supply while maintaining the required negative emitter potential for raising gate voltage.
Solution Approach 2:
The power supply circuit is designed to serve multiple functions: it provides both the main power supply voltage and the negative emitter potential simultaneously. The single power supply unit performs dual roles, eliminating the need for dedicated negative power supply equipment.
2Power
If an external negative power supply is provided to maintain negative power supply, then the gate voltage of the switching element can be raised, but the cost increases
Solution Approach 1:
The patent merges the negative power supply function into the existing power supply circuit by connecting the emitter of the first switching element to the negative terminal of the power supply. This eliminates the need for a separate external negative power supply while maintaining the required negative emitter potential for raising gate voltage.
Solution Approach 2:
The power supply circuit is designed to serve multiple functions: it provides both the main power supply voltage and the negative emitter potential simultaneously. The single power supply unit performs dual roles, eliminating the need for dedicated negative power supply equipment.
3Power
If an external negative power supply is provided to maintain negative power supply, then the gate voltage of the switching element can be raised, but the space requirements increase
Solution Approach 1:
The patent merges the negative power supply function into the existing power supply circuit by connecting the emitter of the first switching element to the negative terminal of the power supply. This eliminates the need for a separate external negative power supply while maintaining the required negative emitter potential for raising gate voltage.
Solution Approach 2:
The power supply circuit is designed to serve multiple functions: it provides both the main power supply voltage and the negative emitter potential simultaneously. The single power supply unit performs dual roles, eliminating the need for dedicated negative power supply equipment.
Data Source
AI summary
According to the present disclosure, a semiconductor apparatus comprises a first switching element including a high voltage terminal, a low voltage terminal, and a control terminal; a second switching element being connected in parallel to the first switching element and including a high voltage terminal, a low voltage terminal, and a control terminal; a drive circuit that drives the first switching element and the second switching element, by supplying a control signal based on potential of a GND terminal, to the control terminal of the first switching element and the control terminal of the second switching element; and a resistor connected between the low voltage terminal of the first switching element and the low voltage terminal of the second switching element. The GND terminal of the drive circuit is connected between the low voltage terminal of the second switching element and the resistor.