Aerosol Power Supply Circuit Layout for Receptacle Surge Protection
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Solution Overview
Problem
Existing power supply units for aerosol generation devices face challenges in safely connecting protective components to multiple terminals in a receptacle, leading to instability and increased cost and size.
Innovation Solution
A power supply unit for aerosol generation devices that includes a power supply, heater connector, controller, charging IC, receptacle, and protective components on both power supply and data lines, with more protective components on the power supply line to stabilize operation while preventing cost and size increases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If protective components are connected to multiple terminals in the receptacle, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple protective functions into a single integrated protective component connected to the VBUS terminal. This component provides overvoltage protection, overcurrent protection, and reverse polarity protection simultaneously, rather than using separate components for each function. The protective component includes a P-channel MOSFET, resistors, and capacitors arranged to deliver multiple protection mechanisms through one unified structure.
Solution Approach 2:
The protective component serves multiple protective functions across different terminals. The single protective component connected to VBUS protects not only the power supply line but also indirectly protects the data terminals (D+, D-) from power-related disturbances. This multi-functional approach allows one component to safeguard the entire receptacle system against various power anomalies.
2Reliability
If protective components are added to the power supply unit, then reliability is improved, but cost increases
Solution Approach 1:
The patent reduces component count by merging multiple protective functions into a single protective component. Instead of using separate components for overvoltage protection, overcurrent protection, and reverse polarity protection, the invention integrates these functions into one component connected to the VBUS terminal, thereby reducing assembly steps and material costs.
Solution Approach 2:
The protective component acts as an intermediary between the external power supply and the internal circuitry. It mediates power flow by controlling the P-channel MOSFET to allow safe charging current while blocking harmful disturbances. This intermediary approach protects expensive internal components (battery, charging IC, controller) from power-related failures without requiring protection on every individual terminal.
3Reliability
If protective components are added to the power supply unit, then reliability is improved, but the size of the device increases
Solution Approach 1:
The patent consolidates multiple protective components into a single integrated protective unit, reducing the total volume occupied by protective elements. The P-channel MOSFET, resistors, and capacitors are arranged in a compact configuration within one protective component structure, minimizing space requirements compared to distributed protective components across multiple terminals.
Solution Approach 2:
The protective component is designed with a nested structure where smaller components (resistors, capacitors) are integrated within or around the main P-channel MOSFET housing. This nesting arrangement allows the protective functions to be packed into a compact footprint that does not significantly increase the overall device volume.
Data Source
AI summary
A power supply unit of an aerosol generation device includes: a power supply; a heater connector to which a heater is connected; a controller configured to control supply of power from the power supply to the heater connector, a charging IC including an input terminal and a charging terminal connected to the power supply and configured to convert power input to the input terminal and output the power from the charging terminal; a receptacle including a power supply terminal and a data terminal and electrically connected to an external power supply; a power supply line connecting the power supply terminal and the input terminal; a data line connecting the data terminal and the controller; first protective components on the power supply line; and a second protective component on the data line. The number of the first protective components is larger than the number of the second protective component.