Multi-output Switching Regulator with Switchable Capacitor Nodes

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Solution Overview

Problem

Existing multi-output switching regulators face challenges in providing different output voltages and optimizing capacitor specifications, leading to increased costs due to stringent capacitor requirements.

Innovation Solution

A multi-output switching regulator design that allows for various connections of output capacitors to different nodes or ground, enabling flexible voltage configurations and reducing the need for high-specification capacitors by allowing switchable connections between input, output, and ground nodes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If output capacitors are connected in conventional fixed configurations, then the circuit structure is simple, but the flexibility in providing different output voltages is limited and capacitor specification requirements increase

Engineering Contradiction:
Improveflexibility in providing different output voltagesVSAvoidcapacitor connection configuration
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent applies the dynamics principle by making the capacitor connections switchable rather than fixed. Switches are introduced to allow the capacitors to be dynamically reconfigured between different nodes (input node, output nodes, or ground) based on the desired output voltage configuration. This enables the system to adapt to different voltage requirements while maintaining a manageable circuit structure through controlled switching.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The patent implements universality by designing the capacitor connection system to serve multiple functions. The same capacitors can be connected to different nodes depending on the switching state, allowing them to function in various roles: as output capacitors, as input capacitors, or as ground references. This multi-functionality reduces the need for separate capacitors for different voltage configurations and lowers overall component specification requirements.

Inventive Principle:
Principle #6Universality (Multi-functionality)

2Reliability

If high-specification capacitors are used to meet stringent requirements, then output voltage stability is improved, but cost increases

Engineering Contradiction:
Improveoutput voltage stabilityVSAvoidcost
Core Design Contradiction:
ReliabilityVSEase of manufacture

Solution Approach 1:

By enabling dynamic reconfiguration of capacitor connections, the system can optimize capacitor utilization based on operating conditions. The switches allow capacitors to be connected to the most appropriate nodes for each output voltage requirement, ensuring stable output voltages are achieved through optimal connection rather than requiring over-specified capacitors. This reduces the need for expensive high-specification capacitors while maintaining reliability.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The patent changes the connection parameters (which nodes the capacitors are connected to) rather than changing the capacitor specifications themselves. By adjusting the switching states to connect capacitors to different nodes (input, output, or ground), the system achieves the desired output voltage stability through parameter adjustment rather than requiring capacitors with higher voltage ratings or stricter tolerance specifications, thereby reducing cost.

Inventive Principle:
Principle #35Parameter changes

3Adaptability or versatility

If multiple fixed output voltages are provided, then the regulator meets specific application requirements, but the device complexity and capacitor specification requirements increase

Engineering Contradiction:
Improvemultiple output voltage capabilityVSAvoidcapacitor connection structure
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent uses dynamic switching to provide multiple output voltage capabilities. Instead of requiring separate fixed capacitor connections for each voltage level, the system uses switches to dynamically reconfigure the same capacitors into different connection patterns. This allows multiple output voltages to be achieved through controlled switching of a single capacitor network, reducing overall device complexity compared to having separate capacitor sets for each voltage level.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The capacitor connection system is designed with multi-functionality to serve multiple output voltage requirements. The same capacitors can be switched to connect to different nodes depending on which output voltage is needed, making the capacitor network universal rather than dedicated to a single function. This reduces the total number of capacitors required and simplifies the overall device structure while maintaining the ability to provide multiple output voltages.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Data Source

PatentUS8106531B2Multi-output switching regulator and control method therefor
Publication Date: 2012.01.31 RICHTEK TECH
  • US8106531B2 patent drawing
  • US8106531B2 patent drawing
  • US8106531B2 patent drawing

AI summary

The present invention discloses a multi-output switching regulator, comprising: a single-input-multiple-output voltage converter converting an input voltage to a first output voltage at a first node and a second output voltage at a second node; an input capacitor connected with the input voltage at an input node; a first output capacitor having two ends, one of which is connected with the first node; and a second output capacitor having two ends, one of which is connected with the second node; wherein the other end of the first output capacitor is connected to ground, the input node or the second node, and the other end of the second output capacitor is connected to ground, the input node or the first node.