PQ3220 Inverter home appliance control board Single-phase high-frequency transformer
PQ3220
PQ3220 Ferrite transformer is made with pq type ferrite core and a dedicated frame, specifically designed for small and medium power switching power supplies.
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PQ3220 high-frequency transformer is designed primarily to balance efficiency and temperature rise during high-frequency operation, and serves as a key component in devices such as power adapters and chargers.
Product parameters
| Frequency characteristic | High‑frequency | Cooling form | Liquid/oil‑immersed |
| Number of power phases | Multiphase | Cooling method | Oil‑immersed self‑cooled |
| Winding type | Three‑winding | Appearance and Structure | Vertical type |
| Moisture‑proof methods | Open‑ended | Brand | CXWON |
| Moisture‑proof methods | Sealed type | Core shape | PQ type |
| Inductance | 300uH±10% | Pins | 6+6P |
Main transformer models：
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Core advantages of PQ transformer
1. PQ core structure provides excellent magnetic shielding, reduces stray flux interference to nearby PCB components and simplifies EMC debugging.
2. Large effective core cross‑section delivers great heat dissipation, low full‑load temperature rise for continuous‑running hundred‑watt‑level flyback power supplies.
3. Well‑controlled leakage inductance, suppresses switching voltage spike and reduces component stress.
4. Horizontal DIP through‑hole package with low profile height, suitable for height‑limited power units and compatible with automatic insertion assembly.
5. Sufficient creepage distance on bobbin. Reinforced insulation can be realized with triple‑insulated wire to meet industrial safety standards.
6. Widely‑used standard power core with stable supply chain. Custom turns ratio, pin assignment and insulation level available for industrial, energy‑storage auxiliary power and high‑power adapters.
PQ transformer real-shot details：
Typical application scenarios
Flowchart
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FAQ
Q: PQ3220 vs EQ30，what are the main differences?
A: PQ3220 is horizontal pot‑type core with better magnetic shielding, lower stray flux and higher power rating, but larger PCB footprint and low profile. EQ30 is vertical type with smaller PCB footprint but higher body height and lower power capacity.
A: PQ3220 is horizontal pot‑type core with better magnetic shielding, lower stray flux and higher power rating, but larger PCB footprint and low profile. EQ30 is vertical type with smaller PCB footprint but higher body height and lower power capacity.
Q: What is the weakness of PQ3220 package?
A: Horizontal package occupies large PCB footprint. Not recommended for low‑power products with limited PCB space.
Q: What power range can PQ3220 cover?
A: Typical power range 80‑220W. Actual power depends on operating frequency, core material and temperature‑rise limit. Better heat dissipation brings higher output power.
Q: What factors will affect PQ3220 leakage inductance?
A: Leakage inductance is mainly determined by winding process, winding arrangement and primary‑secondary isolation distance. Sandwich winding method can effectively reduce leakage inductance with higher winding cost.
Q: What is the main difference between PQ3220 and PQ2625?
A: PQ3220 has larger core cross‑section and higher power capacity. PQ2625 is more compact for power below 80W. Choose PQ3220 for high‑power requirement, PQ2625 for limited‑space projects.
