Feature of audio transformer
1) Export power range from 0.5W -- 50W
2) High efficiency and low temperature rising
3) High frequency
4) Great power densities
5) Serious technology
6) Effective insulation
audio transformer type and size (example)
| P/N | Bobbin | Shape Size | P/N | Bobbin | Shape Size | |
| RM4 | (3+3PIN)2S | 12.6/10.8/10 | EI10 | 4+4PIN | 2.50/8.00 | |
| RM14 | 6+6PIN | 42/41.5/30.1 | EI40 | 6+6PIN | 5.00/22.50 | |
| P/N | Bobbin | Shape Size | EE08 | 2+2PIN | 5.00/6.75 | |
| EFD15 | 4+4PIN | 3.75/13.80 | EE55 | 7+7PIN | 5.00/39.40 | |
| EFD40 | 8+8PIN | 5.00/35.00 | ER28 | 6+6PIN | 5.00/17.50 | |
| EPC13 | (5+5PIN)4S | 2.50/10.50 | ER42 | 8+8PIN | 5.00/35.00 | |
| EPC46.5 | (9+9PIN) | 5.00/35.00 | EE12.6 | SMD(10PIN) | 2.50/17.70 | |
| PQ2016 | 6+8PIN | 2.50/3.80/20 | EE19 | SMD(10PIN) | 2.50/14.30 | |
| PQ4040 | 6+6PIN | 5./15.20/38 | EEL18 | SMD(10PIN) | 23.30/50.40 | |
| EL16 | 4+6PIN | 2.70/3.50/12 | EEL22 | SMD(3PIN) | 12.50/14.40 | |
| EEL19 | 4+6PIN | 2.70/3.50/12 | EFD12 | SMD(8PIN) | 3.00/20.00 | |
| ETD29 | 6+6PIN | 5.00/25.80 | EFD30 | SMD(11PIN) | 3./8.05/44 | |
| ETD59 | 13+13PIN | 5.08/20.80 | EPC13 | SMD(10PIN) | 2.50/19.60 | |
| EF12 | 5+5PIN | 2.50/10.20 | EPC25 | SMD(12PIN) | 3.75/29.70 | |
| EF30 | 6+6PIN | 5.00/25.00 | ER11.5 | SMD(10PIN) | 2.00/12.00 | |
| EF25 | 5+5PIN | 5.00/20.00 | ER14.5 | SMD(10PIN) | 2.50/16.00 |
audio transformer
Specification limit of audio transformer cores
| Low Power Loss Mn-Zn Ferrites Series | ||||||||
| Material Characteristics | Unit | R2.5K | R2.3K | R3K | R2K | |||
| Initial Permeability | 2500 ±25% | 2300 ±25% | 3000 ±25% | 2000 ±25% | ||||
| Bs Saturation Magnetic Flux Density @ H=1194A/m | 23℃ | mT | 510 | 510 | 470 | 400 | ||
| 100℃ | mT | 400 | 390 | 370 | 300 | |||
| Br Remanence Fulx Density | 23℃ | mT | 117 | 95 | 120 | 130 | ||
| 100℃ | mT | — | — | 85 | 60 | |||
| Hc Effective Coercivity | 23℃ | A/m | 12 | 14.3 | 12 | 18 | ||
| 100℃ | A/m | — | — | 7 | 10 | |||
| Tanδ/μi Relative Loss Factor@f=100KHZ | ×10-6 | — | — | — | ||||
| Tc Curie Temperature | ℃ | >220 | >220 | >190 | >220 | |||
| ρ Electrical Resistivity | Ω.m | 10 | 6.5 | 3 | 6.4 | |||
| d Density | Kg/m3 | 4.8 | 4.8 | 4.8 | 4.7 | |||
| Pc Power Loss | 25KHZ 200mT pcv | 25℃ | KW/m3 | 130 | 110 | 160 | ||
| 60℃ | 90 | 75 | — | |||||
| 100℃ | 100 | 70 | 160 | |||||
| 100KHZ 200mT pcv | 25℃ | KW/m3 | 700 | 600 | — | 750 | ||
| 60℃ | 500 | 500 | — | |||||
| 100℃ | 600 | 410 | — | 850 | ||||
| 120℃ | — | 500 | — | |||||
| 300KHZ 100mT pcv | 25℃ | KW/m3 | 660 | — | — | |||
| 60℃ | — | — | — | |||||
| 100℃ | 430 | — | — | |||||
| 120℃ | — | — | — | |||||
| 500KHZ 50mT pcv | 25℃ | KW/m3 | — | — | — | 220 | ||
| 60℃ | — | — | — | |||||
| 100℃ | — | — | — | 250 | ||||
| 120℃ | — | — | — | |||||
Application of audio transformer
Game machiines,Copy machine,Vcrs.
Printers,Terminals,TV sets,Microcomputer equipments.
Power Module,Switch Power and Adapter.
Telephone Communication Control equipments.
Chargers for Tablets, Mobile phone,Electric Toys .
UPS,DVD,VCD Players,Audio and Vedio equipments.
ET28 Product Descriptions
Common mode filter has small discrete capacitors,low ripple factor,small inductance deviation, small impedance deviation,high output current, high harmonic suppression of strong features.
Widely used in color televisions, computers, monitors, player, chargers and other electronic equipment and instruments.
Common specification
| Type | Specification | Power | Working frequency |
| ET Type Filter | ET35 | ±1% | 50-400KHz |
| ET29 | ±1% | 50-400KHz | |
| ET28 | ±1% | 50-400KHz | |
| ET24 | ±1% | 50-400KHz | |
| ET20 | ±1% | 50-400KHz | |
| UI,UU,UF Type Filter | UI100 | ±2% | 50-400KHz |
| UI93 | ±2% | 50-400KHz | |
| UI67 | ±2% | 50-400KHz | |
| UF33 | ±2% | 50-400KHz | |
| UF25 | ±2% | 50-400KHz | |
| UF20 | ±2% | 50-400KHz | |
| UYF16 | ±2% | 50-400KHz | |
| UU10.5 | ±2% | 50-400KHz |
Application of bobbin and ferrite core
| Series | Feature | |
| EE Core | Applied in the switching power supply,main power transformer | |
| EF Core | Applied in the switching power supply,main power transformer | |
| EFD Core | Auxiliary powr transformer,main power transformer,choke coils | |
| EPC Core | Auxiliary powr transformer,main power transformer | |
| PQ Core | Applied in the linear filter,choke,pulse transformer,drive transformer | |
| UU Core | Varieties of switching power supply transformer,choke coils ect. | |
| EC/EER/ER Core | Applied in the linear filter ,current tranformer,smoothing choke coil,drive transformer, switching power transformers and chokes | |
| RM Core | Filters, inductors and transformers for telecommunication other electronic equipment | |
| POT Core | Filters for telecommunication equipment,and various kinds of inductors and transformers | |
| DR Core | Choke coils, Peaking coils, Linearity coils, Alarm coils, Power choke coils, Fixed choke coils, Filtering coils,etc; | |
| EI Core | Various kinds of transformers and chokes | |
| Ring core | Choke coils, Peaking coils, Linearity coils, Alarm coils, various types of filters, inductors and chokes. | |
ElectricalCharacteristics:
1.Operating Temperature range:-20 to+45
2.Storage temperature:-40 to70
3.Switching frequency:1KHz to200KHz
4.Withstanding voltage:1500/3750VAC for 1minute between primary andsecondary
5.Insulation resistance:500VDC 100MΩmiin. betweenprimary&secondary.
Primary advantage
1.Customers requirements are welcome.
2. custom-made transformer as your design specification
3.We have experienced engineers, every one has more than 20 years experience.
4.Every goods must be test three times before shipped to ensure no unqualified products
Application scope:
electronic ballast,compact fluorescent lamp ,Television receiver,radio cassette player,
PC power supply,Monitor,audio, VCD,DVD,UPS,the electronic apparatus,
the noise rejection on the electronic transformer,Induction cooker,etc
Packaging & Delivery
