Switching Mode Power Supply with Bi-Direction Buck and Boost Control
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Solution Overview
Problem
In DSL or ADSL applications and solid state drive or hard disk drive systems, the use of multiple storage capacitors in parallel to manage energy during power shutdown increases system cost, and existing charge pump and LDO circuit combinations result in complex systems with high power loss and reduced efficiency due to the need for many switches and inefficient energy release.
Innovation Solution
A switching mode power supply with an inductor, storage capacitor, boost controller, and buck controller that operates in boost or buck mode based on input signal thresholds, using a single power stage with two switches to manage energy storage and release efficiently, reducing the need for additional switches and minimizing power loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If multiple storage capacitors coupled in parallel are used to store energy, then the energy storage capability is improved, but the system cost increases
Solution Approach 1:
The patent combines the energy storage function with the voltage regulation function into a single integrated circuit architecture. The storage capacitor serves dual purposes: storing energy for power shutdown support and regulating output voltage during normal operation, eliminating the need for separate energy storage components and reducing system cost.
Solution Approach 2:
The switching mode power supply circuit performs multiple functions using the same components: voltage boosting, voltage regulation, energy storage, and power failure protection. The controller manages different operating modes (boost mode, regulation mode, and power failure mode) using the same hardware architecture, making the system highly versatile and cost-effective.
2Power
If a charge pump is used to pump input signal to higher voltage, then the voltage boosting capability is improved, but the system complexity increases due to many switches
Solution Approach 1:
The patent merges the voltage boosting function with the voltage regulation function into a single integrated switching mode power supply circuit. The same inductor, switches, and controller used for boosting also perform regulation during normal operation, eliminating the need for separate charge pump circuits and reducing overall system complexity.
Solution Approach 2:
The controller dynamically switches between different operating modes based on system conditions: boost mode when voltage needs to be increased, regulation mode during normal operation, and power failure mode when input power is lost. This dynamic adaptation allows the system to maintain optimal performance across varying conditions without requiring multiple dedicated circuits.
3Power
If LDO circuit is used to release stored energy, then the energy release function is improved, but the power loss increases and system efficiency decreases
Solution Approach 1:
The patent replaces the linear LDO regulation mechanism with a switching mode power supply architecture. Instead of using a linear regulator that dissipates excess voltage as heat, the system uses synchronous rectification with MOSFET switches and an inductor to transfer energy efficiently, reducing power loss and improving overall system efficiency.
Solution Approach 2:
The switching mode power supply operates by periodically switching the MOSFETs on and off, transferring energy in discrete packets through the inductor. This periodic switching action allows for efficient energy transfer and regulation without the continuous power dissipation characteristic of LDO circuits, significantly reducing power loss during energy release.
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
This solution allows for efficient energy management with reduced system complexity and cost by regulating the power stage to achieve any desired storage voltage with lower power loss and increased efficiency compared to conventional techniques.
Implementation Method 1
an inductor having a first terminal and a second terminal, wherein the first terminal is coupled to the input port to receive the input signal
Implementation Method 2
a storage capacitor coupled between the storage port and ground to store energy
Data Source
AI summary
The present disclosure discloses a switching mode power supply with bi-direction buck and boost control. The switching mode power supply enters boost mode when an input signal is higher than a preset threshold to pump the input signal to a higher level; and the switching mode power supply enters buck mode when the input signal breaks down to release the stored energy.