Description
PQ3225 Ferrite High Frequency Power Transformer
PQ3225 ferrite high frequency power transformer serves as the core energy conversion component for half-bridge switching power supplies.
Switching power supplies adopt multiple circuit topologies, among which the half-bridge circuit is widely applied. During operation, two switching transistors work alternately to generate 100kHz high-frequency pulse signals. The PQ3225 transformer converts these pulses into alternating output current; the output voltage can be precisely customized by adjusting the turn ratio of primary and secondary windings.
A standard half-bridge power circuit consists of three types of high-frequency transformers: main power transformer, drive transformer and auxiliary standby transformer. Each category follows standardized core dimension specifications:
- Main transformer: For power supplies over 200W, the core height shall not be less than 35mm
- Auxiliary transformer: A 16mm core diameter meets the demand for equipment below 300W
Our PQ3225 model supports customized power output to match various half-bridge power equipment. We provide full customization services including winding turns, pin arrangement and 130℃/180℃ heat-resistant enameled wire to fit your PCB circuit design.
Dimension
| Type | Structure type | Dimension(mm) | Pin Row1(mm) | Pin Row2(mm) | Row Pitch | OD Pin(mm) | Note | ||||
| A | B | C | Pin | Pin Pitch | Pin | Pin Pitch | |||||
| PQ20-001 | Vertival | 23 | 23 | 18.5 | 6 | 3.8/5.0 | 8 | 3.8/5.0 | 20.5 | ∅0.6 | |
| PQ20-002 | Vertival | 21 | 21 | 21 | 6 | 3.5/4.3 | 6 | 3.5/4.3 | 19 | ∅0.7 | |
| PQ20-003 | Vertival | 23 | 23 | 22.5 | 6 | 3.8/5.0 | 8 | 3.8/5.0 | 20.5 | ∅0.6 | |
| PQ20-004 | Vertival | 21 | 21 | 21 | 6 | 3.5/4.3 | 6 | 3.5/4.3 | 19 | ∅0.7 | |
| PQ26-001 | Vertival | 27 | 29.5 | 21 | 6 | 3.8/7.7 | 6 | 3.8/7.7 | 25.5 | ∅0.7 | |
| PQ26-002 | Vertival | 27 | 37 | 21 | 6 | 4.5 | 6 | 4.5 | 32.5 | ∅0.8 | |
| PQ26-003 | Vertival | 27 | 29.5 | 23 | 6 | 3.8/7.5 | 6 | 3.8/7.5 | 25.4 | ∅0.6 | |
| PQ26-004 | Vertival | 27 | 29.5 | 26 | 6 | 3.8/7.5 | 6 | 3.8/7.5 | 25.4 | ∅0.7 | |
| PQ32-001 | Vertival | 33 | 34 | 21 | 6 | 5.0/7.5 | 6 | 5.0/7.5 | 30 | ∅0.8 | |
| PQ32-002 | Vertival | 33 | 34 | 27 | 6 | 5.0/7.5 | 6 | 5.0/7.5 | 30 | ∅0.8 | |
| PQ32-003 | Vertival | 33 | 34 | 32 | 6 | 5.0/7.5 | 6 | 5.0/7.5 | 30 | ∅0.8 | |
| PQ35-001 | Vertival | 35 | 39 | 38 | 6 | 5.0/10 | 6 | 5.0/10 | 35.5 | ∅0.9 | |
| PQ40-001 | Vertival | 40 | 44 | 44 | 6 | 5.0/15 | 6 | 5.0/15 | 38 | ∅0.9 | |
| PQ50-001 | Vertival | 51 | 51 | 55 | 6 | 7.4/12.3 | 6.0 | 7.4/12.3 | 45.7 | ∅1.2 | |
PQ3225 High Frequency Transformer Specifications
| Parameter | Technical Data |
|---|---|
| Model | PQ3225 High Frequency Transformer |
| Operating Frequency | 10kHz ~ 200kHz |
| Output Power | Fully Customized |
| Operating Temperature | -40℃ ~ +125℃ |
| Storage Temperature | -25℃ ~ +85℃ |
| Storage Humidity | 30% ~ 95% RH |
Core Characteristics of PQ3225 High Frequency Transformer
1. Balanced Current Distribution
Our PQ3225 high frequency transformer adopts multiple parallel secondary windings coupled to one shared primary winding. Neglecting excitation current, the ampere-turns generated by each secondary winding match those of the primary winding perfectly.
This balanced current characteristic brings obvious advantages for parallel rectifier circuits: it delivers uniform winding current without extra balancing resistors or auxiliary matching components, simplifying your circuit design.
2. High Current Density
The PQ3225 series features excellent temperature rise control. Thanks to reliable thermal stability, it supports high current density within a compact ferrite core housing, saving valuable PCB layout space for power supply equipment.
3. High Energy Conversion Efficiency
By precise control of leakage inductance, PQ3225 transformers achieve fast switching speed and extremely low cross-conduction loss. The energy transmission loss between primary and secondary windings is minimized, realizing high overall operating efficiency for switching power supplies.
4. High Power Density
Compact core size and superior heat dissipation enable PQ3225 transformers to be densely assembled alongside semiconductors and inductors on PCBs for high power density designs. This model supports up to 30A current output per module for industrial power equipment.
5. Low Manufacturing Cost
PQ3225 transformers consist of a small number of standard low-cost raw components, paired with streamlined assembly processes. This structure effectively cuts down total production cost for mass purchasing.
6. Cut Down Costs of Peripheral Matching Components
Thanks to its low leakage inductance and minimal switching loss, this transformer greatly lessens electrical stress on its connected peripheral components.
As a result, you can adopt cheaper components with lower power ratings for the peripheral circuit, effectively reducing the overall BOM cost of your power supply system.
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