Load Drive Device Adjacent Output Terminals Signal Interference

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Solution Overview

Problem

Load drive devices face challenges in minimizing signal interference and optimizing wiring design due to the need for efficient power supply and signal routing across multiple channels, particularly in vehicle-mounted applications.

Innovation Solution

A load drive device with a pair of output terminals in each channel, where the terminals are arranged adjacent to each other, and additional terminals are placed between output and external connection terminals to manage signal interference and wiring complexity, incorporating a control circuit for state control and data storage to manage channel operations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If output terminals are arranged adjacent to each other in multiple channels, then wiring design is simplified and routing becomes easier, but signal interference between channels increases

Engineering Contradiction:

Improvewiring designVSAvoidsignal interference

Core Design Contradiction:

Ease of manufactureVSObject-affected harmful factors

Solution Approach 1:

The patent introduces separate terminals as intermediary elements positioned between output terminals of different channels. These separate terminals act as mediators that physically separate the high-current output paths, reducing electromagnetic coupling and signal interference between adjacent channels while maintaining the overall compact terminal arrangement for easy wiring.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Object-affected harmful factors

If separate terminals are arranged between output terminals of different channels, then signal interference is reduced, but device complexity increases

Engineering Contradiction:

Improvesignal interferenceVSAvoidterminal arrangement

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The patent segments the terminal arrangement into distinct groups: output terminals for each channel, separate terminals positioned between channels, external connection terminals, and power supply terminals. This segmentation allows each group to serve its specific function while maintaining an organized, systematic layout that reduces complexity despite the increased number of terminal elements.

Inventive Principle:

Principle #1Segmentation

3Productivity

If multiple terminal groups are provided on the same surface, then wiring efficiency is improved, but risk of short circuit damage increases

Engineering Contradiction:

Improvewiring efficiencyVSAvoidshort circuit protection

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent applies local quality by providing different terminal types (output terminals, separate terminals, external connection terminals, power supply terminals) in specific localized positions on the housing surface. Each terminal group has optimized local characteristics for its function, and the spatial distribution creates natural isolation zones that reduce short circuit risk while maintaining wiring efficiency.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS11392102B2Load drive device, semiconductor device, load drive system and vehicle

Publication Date: 2022.07.19 ROHM CO LTD

AI summary

A driver IC (100) includes a pair of output terminals in each of a plurality of channels and in each of the channels, power is supplied from the pair of output terminals (OUT1 and OUT2, OUT3 and OUT4, OUT5 and OUT6 or OUT7 and OUT8) to a load (M1, M2, M3 or M4). In each of the channels, the pair of output terminals are adjacent to each other.