Aerosol Heater Power Supply Circuit Using Transistor Feedback Charging
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Solution Overview
Problem
The existing power supply units for aerosol generation devices have a large circuit scale due to the use of separate charging integrated circuits, which increases complexity and reduces efficiency.
Innovation Solution
A power supply unit with an internal power supply, a connector for an external power supply, a controller, and a dropper-type transistor that adjusts power supply through feedback control, eliminating the need for a separate charging integrated circuit by using a Schottky diode and a circuit board with ground and current detection circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate charging integrated circuit is used to control power supplied from the external power supply to the internal power supply, then the charging control function is improved, but the circuit scale increases
Solution Approach 1:
The patent merges the charging control function into the existing controller that already controls the heater operation. The controller integrates both the heating control and charging control functions, eliminating the need for a separate charging integrated circuit. This is achieved by having the controller manage power flow from the external power supply to the internal power supply through the existing power supply path, thereby reducing circuit scale while maintaining reliable charging control.
2Device complexity
If the circuit scale is reduced by eliminating separate charging integrated circuit, then device complexity is improved, but control precision may worsen
Solution Approach 1:
The controller is designed to perform multiple functions: it controls both the heater operation and the charging process. By making the controller universal and multi-functional, the patent maintains precise control over power supply operations without requiring additional dedicated circuits. The controller adjusts power supply parameters based on the operational state, ensuring precise control is preserved despite the reduction in circuit complexity.
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 configuration reduces the circuit scale, improves efficiency, and enhances safety by allowing for precise control of power supply to the aerosol generation device's heater, while maintaining effective charging and discharging operations.
Implementation Method 1
The controller performs feedback control on a voltage of a gate of the first transistor based on a current or a voltage supplied from the first transistor, thereby adjusting power supplied from the external power supply to the internal power supply.
Implementation Method 2
A Schottky diode is used in the power supply unit, where an anode of the Schottky diode is connected to the drain of the first transistor, and a cathode of the Schottky diode is connected to the source of the first transistor.
Data Source
AI summary
A power supply unit for an aerosol generation device is provided. The power supply unit includes an internal power supply configured to hold power supplied to a heater configured to heat an aerosol source, a connector connectable to an external power supply, a controller configured to control power supply from the internal power supply to the heater, and a first transistor positioned on a first power supply path between the connector and a positive electrode of the internal power supply. A current from the connector is supplied to a source of the first transistor. A current from a drain of the first transistor is supplied to the positive electrode of the internal power supply. The controller controls a voltage of a gate of the first transistor to adjust power supplied from the external power supply to the internal power supply.