Switched Capacitor Converter Voltage Regulation for Battery Shutdown Prevention
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Solution Overview
Problem
Existing power supply conversion structures in electronic devices fail to ensure stable and reliable operation, especially in harsh environments or low battery voltage conditions, leading to issues like black screens and shutdowns, and are often large and costly, contradicting the trend of miniaturization and efficiency.
Innovation Solution
A power supply conversion structure comprising a switched capacitor converter and a voltage regulating module, controlled by a controller, which converts battery voltage into a higher output voltage when the load voltage drops below a threshold, ensuring stable operation and reducing the number of switches for a compact and cost-effective design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional power supply conversion structure is used, then the device can operate in normal conditions, but it fails to maintain stable operation in harsh environments or low voltage conditions, leading to black screens and shutdowns
Solution Approach 1:
The power supply conversion structure dynamically adjusts its conversion ratio based on real-time voltage conditions. When the battery voltage drops below a threshold or harsh conditions are detected, the system automatically switches to a higher conversion ratio mode, enabling it to maintain stable output voltage despite varying input conditions and load demands.
Solution Approach 2:
The system changes the conversion ratio parameter from a fixed value to a variable that can be adjusted between different ratios. This allows the power supply to adapt its electrical parameters to match the demanding conditions, ensuring reliable operation across a wide range of battery voltages and environmental conditions.
2Reliability
If traditional voltage regulation methods are used, then the design can be simple, but the output voltage cannot be increased above the battery voltage to prevent shutdowns
Solution Approach 1:
The voltage regulating module dynamically adjusts its operation based on the detected voltage conditions. When shutdown risk is detected, the system activates a mode that generates output voltage higher than the battery voltage, transforming a static regulation system into a dynamic one that can actively prevent shutdowns by boosting voltage when needed.
Solution Approach 2:
The controller proactively detects when battery voltage is approaching critical levels and preemptively adjusts the conversion ratio to maintain adequate output voltage. This preliminary action prevents the voltage from dropping to shutdown levels in the first place, maintaining stable operation before the crisis occurs.
3Reliability
If existing power supply conversion structures are used, then the design can be straightforward, but the size and cost are large, contradicting miniaturization and efficiency trends
Solution Approach 1:
The switched capacitor converter is designed to perform multiple functions: it can operate at different conversion ratios, function as both a voltage regulator and a power management device, and adapt to various battery voltages. This multi-functionality eliminates the need for separate circuits for different voltage conditions, reducing overall device size and component count while maintaining reliable operation.
Solution Approach 2:
The patent combines the voltage conversion and regulation functions into a single integrated switched capacitor converter structure. By merging these functions and using a controller that manages multiple operating modes within one device, the system achieves reliable operation across different conditions without requiring multiple separate components, thus reducing size and cost.
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 effectively maintains stable voltage to the load, preventing device shutdowns and improving user experience, while reducing size and cost by cooperative operation of the switched capacitor converter and voltage regulating module.
Implementation Method 1
a switched capacitor converter which comprises at least one switch, a power supply output terminal, and a first output terminal, wherein the switched capacitor converter is configured to convert a voltage of a battery connected to the power supply output terminal of the switched capacitor converter into a first voltage
Implementation Method 2
a voltage regulating module which comprises at least one switch, an input terminal, and an output terminal, wherein the input terminal of the voltage regulating module is connected to the first output terminal of the switched capacitor converter and is configured to receive the first voltage and converting the first voltage into a second voltage
Data Source
AI summary
A power supply conversion structure and an electronic device including the same are provided. By providing a voltage regulating module connected to a switched capacitor converter, the voltage regulating module receives a first voltage of the switched capacitor converter and converts the first voltage into a second voltage, and the second voltage is higher than a voltage of a current battery, so that in the use process of the electronic device, if a voltage output to a load of the electronic device is reduced below a threshold voltage, the voltage output to the load of the electronic device is boosted to be higher than the voltage of the current battery, thus avoiding bad customer experience such as black screen and even shutdown of the electronic device. As the switched capacitor converter and the voltage regulating module operate cooperatively, the number of switches can be reduced.