Discrete DC-DC Converter Circuit for Cost Reduction
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Solution Overview
Problem
Conventional DC-DC converting circuits for converting high DC voltages to low DC voltages are costly due to the use of high precision, expensive integrated circuits, and require additional components for noise and interference compensation.
Innovation Solution
A DC-DC converting circuit utilizing a transistor-based regulating circuit with a bleeder circuit and a load, where the transistor's emitter is connected to the input terminal, the base is connected to a voltage-controlling terminal, and the collector is connected to the output terminal via the bleeder circuit, allowing for stable voltage conversion using discrete components like resistors, capacitors, and diodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a three-terminal regulator is used for DC-DC conversion, then voltage conversion precision is improved, but circuit cost increases
Solution Approach 1:
The patent divides the voltage regulation function into multiple discrete components: a transistor for voltage control, a bleeder circuit for voltage division, and capacitors for frequency compensation. This segmentation replaces the integrated three-terminal regulator with individual components that can be selected based on cost and performance requirements, resolving the contradiction between precision and cost.
Solution Approach 2:
The patent creates a functional copy of the three-terminal regulator using discrete components. The transistor-based regulating circuit replicates the voltage regulation function, while the bleeder circuit with resistors R1 and R2 copies the voltage division function, achieving similar performance at lower cost.
2Measurement precision
If a three-terminal regulator is used for DC-DC conversion, then voltage conversion precision is improved, but device complexity increases
Solution Approach 1:
The patent extracts the essential functions of the three-terminal regulator (voltage control, voltage division, and frequency compensation) and implements them separately using simple discrete components. This extraction simplifies the overall circuit by removing the complex integrated circuit while maintaining the necessary functions through straightforward component arrangements.
Solution Approach 2:
The patent replaces the expensive, complex integrated circuit with inexpensive, simple discrete components such as transistors, resistors, and capacitors. These individual components are easier to manufacture, replace, and troubleshoot, reducing both initial cost and long-term maintenance complexity.
3Stability of the object's composition
If additional capacitors are added for frequency compensation, then output stability is improved, but device complexity increases
Solution Approach 1:
The patent incorporates frequency compensation capacitors (C1 and C2) as standard part of the circuit design from the beginning. By pre-configuring these capacitors with appropriate values, the circuit is designed to be inherently stable without requiring complex additional compensation networks, thus achieving stability while maintaining simplicity.
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 provides a cost-effective and simple configuration for converting high DC voltages to low DC voltages while maintaining a stable output voltage, reducing the overall circuit cost and complexity.
Implementation Method 1
The regulating circuit includes a transistor, and the transistor includes a base, an emitter, and a collector. The emitter is connected to the input terminal, the base is connected to the voltage-controlling terminal, and the collector is connected to the output terminal via the bleeder circuit.
Implementation Method 2
the bleeder circuit is configured to supply a stable divided voltage to the output terminal for output
Data Source
AI summary
An exemplary DC-DC converting circuit (2) includes an input terminal (20), a regulating circuit (21), a bleeder circuit (23), an output terminal (25), a voltage-controlling terminal (26), and a load (24). The input terminal, the regulating circuit, the bleeder circuit, and the output terminal are connected in series. The output terminal is grounded via the load. The voltage-controlling terminal is configured to supply a controlling voltage that controls the regulating circuit, and the bleeder circuit is configured to supply a stable divided voltage to the output terminal for output.