Boost Regulator Dynamic Regulation Band Control
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Solution Overview
Problem
Conventional boost regulators face inefficiencies when operating at low current levels of flash LEDs, leading to poor voltage headroom and increased output ripple, as they rely on fixed regulation band sizes that do not adapt to changing load conditions.
Innovation Solution
The implementation of a boost regulator system with a dynamic regulation band control circuit that adjusts the size of the regulation band based on the current level of the light emitting element, ensuring adaptive headroom control and reduced output ripple across varying current loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed regulation band size is used in the boost regulator, then the device complexity is reduced, but the efficiency deteriorates at low current levels and the output ripple increases
Solution Approach 1:
The regulation band size is made dynamic rather than fixed. The regulation band control circuit adjusts the size of the regulation band based on the current level of the light emitting element, allowing the boost regulator to adapt to varying load conditions and maintain high efficiency at both high and low current levels.
Solution Approach 2:
The patent changes the parameter of regulation band size based on operating conditions. By monitoring the current level of the light emitting element and adjusting the regulation band size accordingly, the system optimizes its performance across different current levels, preventing efficiency deterioration at low current while maintaining stability at high current.
2Device complexity
If a fixed regulation band size is used in the boost regulator, then the device complexity is reduced, but the output ripple increases at low current levels
Solution Approach 1:
The regulation band size is dynamically adjusted based on the current level of the light emitting element. At low current levels, the regulation band size is increased to provide better noise immunity and reduce output ripple, while at high current levels, a smaller regulation band size is used to maintain fast transient response.
Solution Approach 2:
The patent changes the regulation band size parameter in response to varying current levels. This dynamic parameter adjustment allows the system to minimize output ripple at low current levels while maintaining overall system performance across the full operating range.
3Object-generated harmful factors
If the regulation band size is increased to reduce output ripple, then the noise immunity is improved, but the transient response becomes slower
Solution Approach 1:
The regulation band size is made dynamic and is adjusted based on the current level of the light emitting element. This allows the system to have a large regulation band size at low current levels for reduced output ripple and noise immunity, while switching to a smaller regulation band size at high current levels for faster transient response.
Solution Approach 2:
The patent changes the regulation band size parameter according to operating conditions. By monitoring the current level and adjusting the regulation band size accordingly, the system optimizes the trade-off between noise immunity (larger band) and transient response (smaller band) for different operating scenarios.
Data Source
AI summary
Boost regulators with dynamic regulation band are disclosed. In certain configurations, a boost regulator system includes a field effect transistor (FET) current source having a gate controlled by a current level control signal, a source that receives a regulator output voltage, and a drain that outputs a current. The boost regulator system further includes a boost regulator that generates the regulator output voltage based on a reference voltage. The boost regulator includes a headroom detection circuit electrically coupled to the drain of the FET current source and operable to generate a headroom signal indicating a detected voltage headroom of the FET current source. The boost regulator further includes a regulator control circuit that controls a voltage level of the reference voltage based on the headroom signal, and that controls a size of a regulation band of the boost regulator based on the current level control signal.