Aerosol Power Supply PCB Layout for High-Voltage Isolation
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Solution Overview
Problem
The existing power supply units for aerosol generating devices face challenges in effectively mounting electronic components on circuit boards, leading to inadequate durability and functionality.
Innovation Solution
A power supply unit design that includes a first circuit board with a power supply connector and step-up IC, and a second circuit board with electronic components, where the power supply connector and step-up IC are mounted on the first circuit board, separated from the second circuit board, to improve component mounting and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple circuit boards are used to accommodate various electronic components, then the functionality of the aerosol generating device is improved, but the reliability deteriorates due to increased complexity and potential failure points
Solution Approach 1:
The power supply unit is divided into two separate circuit boards: a first circuit board for power supply components and a second circuit board for control components. This segmentation isolates high-voltage power circuits from low-voltage control circuits, preventing interference and reducing failure propagation between systems while maintaining comprehensive functionality.
Solution Approach 2:
The step-up IC and power supply connector are extracted from the control circuit board and placed on a dedicated power supply circuit board. This extraction removes potential sources of electrical interference and failure from the sensitive control system, thereby improving overall reliability while preserving power conversion functionality.
2Device complexity
If the power supply connector and step-up IC are mounted on the same circuit board as control components, then device complexity is reduced, but harmful factors increase due to potential electrical interference and failure risk
Solution Approach 1:
The circuit board is segmented into two distinct boards: the first circuit board hosts the power supply connector and step-up IC for high-voltage power conversion, while the second circuit board accommodates control components. This physical segmentation eliminates electrical interference between high-voltage and low-voltage circuits while maintaining a relatively simple overall device structure.
Solution Approach 2:
The step-up IC and power supply connector are taken out from the control circuit board and mounted on a separate first circuit board. This extraction removes harmful high-voltage electrical fields and potential failure modes from the sensitive control system, reducing electrical interference without significantly increasing device complexity.
3Reliability
If high-voltage components are isolated on a separate circuit board, then reliability is improved, but manufacturing complexity increases
Solution Approach 1:
The power supply unit is segmented into two circuit boards with clearly defined functional zones. The first circuit board contains only power supply components (connector and step-up IC), while the second contains control components. This segmentation simplifies the manufacturing process by allowing separate assembly and testing of power and control sections before final integration, reducing overall manufacturing complexity despite improved reliability.
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 design enhances the durability of the power supply unit by isolating high-voltage components and reducing the risk of component failure, while allowing for miniaturization and cost reduction of the aerosol generating device.
Implementation Method 1
a step-up IC configured to step up a voltage supplied from the power supply and output the stepped-up voltage to the heater
Implementation Method 2
a heater configured to heat an aerosol source by consuming a power supplied from the power supply
Data Source
AI summary
A power supply unit for an aerosol generating device, the power supply unit: a power supply; a power supply connector to which the power supply is connected; a heater connector to which a heater configured to heat an aerosol source by consuming a power supplied from the power supply is connected; a controller configured to control a supply of a power from the power supply to the heater; a first circuit board on which an electronic component is mounted; a second circuit board on which an electronic component is mounted and which is separated from the first circuit board; and a step-up IC configured to step up a voltage supplied from the power supply and output the stepped-up voltage to the heater. The power supply connector and the step-up IC are not mounted on the second circuit board, but are mounted on the first circuit board.