LLC resonant EQ series transformer ultra‑thin power adapter
EQ30
The magnetic core of the EQ transformer is of vertical/horizontal direct-insertion structure. It has a large heat dissipation area and low leakage inductance.
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EQ30 high‑frequency flyback transformer with manganese‑zinc ferrite EQ30 core and vertical through‑hole bobbin. Featuring large core cross‑sectional area, good heat dissipation performance and low leakage inductance, it operates at 50‑150 kHz and is suitable for medium‑to‑high‑power switching power supplies. It is widely applied in industrial control power supplies, LED drivers and household appliance power supplies. Customization of winding turns and pin layout is available, and reinforced insulation can be achieved to meet safety compliance requirements.
Product parameters
| Frequency characteristic | High‑frequency | Number of power phases | Single‑phase |
| Rated Power | 20-150W | Cooling method | Oil‑immersed air‑cooled |
| Moisture‑proofing methods | Open‑ended | Cooling form | Liquid/oil‑immersed |
| Winding form | Auto-coupling | Appearance and Structure | Vertical |
| Efficiency (η) | 90% | Core shape | EQ type |
| Brand | CXWON | Inductance | 560uH±7% |
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Core advantages of EQ transformer
1. Excellent heat dissipation. Large center‑leg cross‑section brings low temperature rise under full‑load for long‑term continuous operation.
2. Low leakage inductance. Optimized core & winding structure reduces voltage spike and simplifies EMC debugging.
3. Strong power handling capacity, well‑suited for medium‑power flyback SMPS.
4. Standard vertical DIP through‑hole package, compatible with automatic PCB insertion and mass production.
5. Sufficient creepage distance on bobbin, supports reinforced insulation to meet safety requirements.
6. Highly customizable: winding turns, pin assignment and insulation level for LED drivers, industrial and household power supplies.
EQ transformer real-shot details：
Typical application scenarios
Flowchart
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FAQ
Q: What applications is EQ30 transformer suitable for?
A: EQ30 is medium‑power flyback high‑frequency transformer for tens‑of‑watts SMPS. Widely used in LED drivers, industrial power supplies, small home appliances and adapters.
A: EQ30 is medium‑power flyback high‑frequency transformer for tens‑of‑watts SMPS. Widely used in LED drivers, industrial power supplies, small home appliances and adapters.
Q: What is the operating frequency range of EQ30?
A: Typical operating frequency 50‑150kHz, adjustable based on core material and winding design.
Q: What topology does EQ30 apply to?
A: Mainly designed for flyback topology. It can also be customized for forward topology.
Q: Can EQ30 meet reinforced insulation safety requirement?
A: Yes. EQ30 bobbin reserves sufficient creepage distance. With insulating tape and triple‑insulated wire, reinforced insulation can be achieved for safety standards.
Q: What is the disadvantage of EQ30 structure?
A: Vertical package has relatively high body height, not recommended for ultra‑thin equipment with strict height limitation.
