Single-Chip Vcc Control Circuit for LED Gate Drivers
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Solution Overview
Problem
In high-breakdown-voltage gate driver systems, particularly in LED systems, managing the power supply (Vcc) independently from the drive circuit is challenging, and integrating both on a single chip to reduce board space requires a stable and efficient Vcc supply.
Innovation Solution
A control circuit is designed with a drive circuit, a charging circuit for generating startup current, and a Vcc control circuit, all integrated on a single chip, utilizing two floating terminals for insulation and feedback to ensure stable Vcc supply, reducing board space and component count.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the drive circuit and Vcc supply circuit are provided on separate chips, then system management becomes difficult and board space increases, but integrating them on one chip requires ensuring stable Vcc supply
Solution Approach 1:
The patent integrates the drive circuit and Vcc supply circuit onto a single chip, combining previously separate functions into one unified device. This merging reduces board space while incorporating specific design features (floating terminals, insulation structures) to maintain Vcc supply stability during integration.
2Area of stationary object
If the drive circuit and Vcc supply circuit are integrated on one chip, then board space is reduced, but the Vcc supply stability becomes challenging to maintain
Solution Approach 1:
The patent segments the integrated chip into distinct functional regions: a drive circuit region and a Vcc supply circuit region. These segments are electrically isolated using insulation structures and connected through controlled interfaces (floating terminals), allowing independent optimization of each circuit while maintaining overall system stability.
Solution Approach 2:
The patent introduces floating terminals as intermediary elements between the drive circuit and Vcc supply circuit. These terminals provide controlled electrical connections while maintaining insulation where needed, acting as mediators that enable circuit interaction without compromising stability or requiring complex direct coupling.
3Ease of operation
If Vcc is controlled independently from the drive circuit, then system management becomes difficult, but integrating control functions increases chip complexity
Solution Approach 1:
The patent creates a unified control device that performs multiple functions: drive signal generation, Vcc supply control, and system management all within a single chip. The Vcc supply circuit is designed to work seamlessly with the drive circuit, providing universal control capabilities that simplify system management while consolidating functions rather than increasing complexity.
Data Source
AI summary
A control circuit of the present invention includes a drive circuit for outputting a gate drive signal, a charging circuit for generating a charging current when the drive circuit is started up, and a Vcc control circuit for, upon receiving an output from the charging circuit, outputting a control signal for supplying Vcc for the drive circuit, wherein the drive circuit, the charging circuit, and the Vcc control circuit are provided in one chip.