Open frame type switching power supply is one of the SMPS format. This format switching power supplies will be used inside the product.

When designing an AC-DC bare board regulated power supply, the following points should be noted:

1. It is necessary to confirm the size of the dimensions. Because these types of power supplies are used inside the product, the assembly space is limited.

2. Determine the fixing method and size of the power supply, as well as the connection method of input and output. This type of power supply usually requires a specific connection method that matches the product.

3. Input Voltage Range: Ensure the power supply can handle the expected AC input voltage range, considering variations and fluctuations in the mains supply.

4. Rectification and Filtering: Select appropriate rectifier diodes and capacitors for efficient AC to DC conversion and filtering to reduce ripple voltage.

5. Transformer Design: Choose the right transformer based on the power requirements, voltage ratios, and frequency characteristics.

6. Switching Components: Select suitable switching transistors or integrated circuits (ICs) for the power conversion stage, considering their voltage and current ratings.

7. Feedback Control: Implement an accurate feedback control mechanism to maintain a stable output voltage under different load conditions.

8. Heat Dissipation: Provide adequate heat sinks or cooling measures to dissipate heat generated by the power components and prevent overheating.

9. PCB Layout: Arrange components on the printed circuit board (PCB) carefully to minimize noise, interference, and parasitic effects. Pay attention to high-current paths and grounding.

10. Safety Standards: Comply with relevant safety standards and regulations to ensure the power supply is safe for use and does not pose electrical hazards.

11. EMI/EMC Considerations: Take measures to minimize electromagnetic interference (EMI) and ensure electromagnetic compatibility (EMC) with other devices.

12. Component Quality: Use high-quality components to enhance the reliability and longevity of the power supply.

These are some of the key considerations in the design of an AC-DC open frame switching power supply to achieve a reliable and efficient power conversion solution as well as suitable for the special applications.