Application Of Transformers in Switching Power Supplies

Application of Transformers in Switching Power Supplies

1. Core Functions of Transformers in Switching Power Supplies

Switching power supply relies on high-frequency on-off of MOS tubes to adjust output voltage, and high-frequency transformer is the key carrier for energy transfer.

Voltage conversion: Step up or step down high-frequency alternating current to obtain stable DC voltage matched with terminal equipment.
Electrical isolation: Isolate the high-voltage input terminal and low-voltage output terminal to prevent electric leakage and enhance user safety.
Impedance matching: Match the impedance of the primary side circuit and secondary side circuit to reduce power loss and improve energy utilization efficiency.

2. Main Application Scenarios

(1)Consumer electronic switching power supply

Mobile phone chargers, laptop adapters, monitor power boxes all adopt small high-frequency transformers. These mini transformers feature small size, low heat generation and strong anti-interference, adapting to portable power supply needs.

(2)Industrial switching power supply

Industrial control power supply, equipment drive power supply, PLC power module use high-power insulated transformers. They bear long-time continuous operation, resist high temperature and voltage fluctuation, ensure stable operation of automation equipment.

(3)New energy & LED drive power

LED street light drivers, solar small power supply, monitoring power adapters need customized transformers. They adapt to wide input voltage range, restrain current ripple, extend the service life of lamps and monitoring devices.

news-2000-1500

3. Key Parameter Requirements for Matching

Enterprises need to select transformers according to clear switching power indicators:

• Input & output voltage range

• Rated power (within 15kW for most conventional models)

• Operating frequency of switching circuit

• Overall installation size and heat dissipation environment

• Withstand voltage insulation level

4. Hensiron Customization Advantage

Hensiron Electronics focuses on R&D and production of switching power transformers and inductors. We provide targeted customization according to customer power supply schemes:

Optimize winding structure to lower temperature rise and solve overheating problems of power supply;
Strictly control withstand voltage performance to avoid breakdown risk during long-term operation;
Adjust size and pin layout according to customer PCB drawings, convenient for assembly;
Support small-batch trial production and mass delivery for European and American customers.

5. Summary

The performance of the transformer directly determines the stability, efficiency and safety of the entire switching power supply. With the upgrading of power supply miniaturization and high efficiency, customized high-frequency transformers become the mainstream choice. Hensiron provides one-stop transformer matching solutions for all types of switching power supply manufacturers.

Yvette Pan