PD Protocol Fill Light Power Supply Circuit with Buck-Boost Stabilization
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Solution Overview
Problem
High-power fill lights have poor mobility due to their bulkiness and requirement for high voltage power supply, limiting their compatibility with mobile power devices that typically only support the PD protocol with 5V/12W power supply parameters.
Innovation Solution
A power supply circuit for high-power fill lights that includes a TYPE-C interface module, a PD induction module with a protocol control chip, and a Buck-Boost switching power supply module to stabilize voltage and enable compatibility with external power supply devices using the PD protocol, allowing for high voltage output above 12V and improved adaptability to varying input voltages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a high-power fill light uses a very large power adapter and DC head for power supply, then the power supply capability is sufficient, but the mobility becomes poor and the device becomes bulky
Solution Approach 1:
The patent changes the voltage parameter from traditional low voltage (5V) to high voltage (above 12V) to enable high-power operation with smaller power supply devices. The Buck-Boost circuit dynamically adjusts voltage parameters to match both the power bank output and fill light requirements, resolving the contradiction between power capability and mobility.
Solution Approach 2:
The fill light is designed with universal compatibility for both PD protocol power banks and traditional DC power adapters. The power supply circuit can accept multiple input types and convert them to the required operating voltage, making the device universally applicable while maintaining high mobility.
2Stability of the object's composition
If the power supply circuit has high requirements on input voltage with a narrow stabilized range, then the voltage stability is ensured, but the adaptability to different mobile power supply devices becomes limited
Solution Approach 1:
The patent employs a dynamic Buck-Boost switching power supply circuit that can adaptively adjust its operating mode. When input voltage is lower than output voltage, it operates in Boost mode; when input voltage is higher, it operates in Buck mode. This dynamic adaptation enables wide input voltage range compatibility while maintaining stable output voltage.
Solution Approach 2:
The power supply circuit changes its operating parameters dynamically based on input voltage conditions. The switching tube Q1 is controlled by the PD induction module to adjust duty cycle and timing, enabling the circuit to stabilize output voltage across a wide range of input voltages from different power sources.
3Power
If the PD protocol power supply device outputs high voltage above 12V, then the power supply requirements are met, but the compatibility with standard PD protocol devices becomes challenging
Solution Approach 1:
The PD induction module acts as an intermediary between the PD power bank and the fill light circuit. It communicates with the PD power bank to negotiate and enable high-voltage output mode, then controls the switching tube Q1 to regulate the voltage appropriately for the fill light, bridging the gap between standard PD protocol and high-power requirements.
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 enhances the mobility of high-power fill lights by enabling them to be powered by a wider range of mobile devices, including those with PD protocol, while ensuring stable and adaptable voltage supply, thus improving their usability in various settings.
Implementation Method 1
a voltage stabilization module, said voltage stabilization module is a Buck-Boost switching power supply module
Data Source
AI summary
The present disclosure discloses a fill light and a power supply circuit thereof, said power supply circuit is electrically connected to an external power supply device with PD protocol, and comprises a TYPE-C interface module, a PD induction module, a switching tube Q1 as well as a voltage stabilization module, said voltage stabilization module is a Buck-Boost switching power supply module, the input of said voltage stabilization module is connected with the drain of said switching tube Q1. The technical solution uses the PD induction module to disguise the fill light to be presented as an electric equipment for supporting PD protocol, so that the external power supply device with PD protocol can output high voltage above 12V, while using the Buck-Boost switching power module as the voltage stabilization module of this technical solution to improve the adaptability of the power circuit to the input voltage amplitude.