PQ 3225 Transformer 90w Power

Description

PQ 3225 90W Power High frequency transformer is the most important part of switching power supply. There are many topological structures in switching power supplies. For example, a half-bridge power conversion circuit. When working, two switching transistors are turned on in turn to generate a high-frequency pulse wave of 100kHz, which is then transformed through a high-frequency transformer to output alternating current. The ratio of the turns of each winding coil of the high-frequency transformer is determined How much is the output voltage. The most conspicuous of a typical half-bridge transformer circuit are three high-frequency transformers: the main transformer, the drive transformer, and the auxiliary transformer (standby transformer). Each transformer has its own measurement standards in national regulations, such as the main transformer. As long as it is a power supply above 200W, its core diameter (height) must not be less than 35mm. As for the auxiliary transformer, the core diameter of 16mm is sufficient when the power supply does not exceed 300W.

 

The Dimension  Of Bobbin:

 

Specification:

PQ  high frequency transformer performance

1. Operating frequency: 10khz-200khz

2. Output power: customized 

3. Operating temperature: -40℃ to +125℃

4. Storage temperature: -25℃ to +85℃

5. Storage humidity: 30 to 95%

The characteristics:

(1) current distribution

A typical high frequency transformer has a number of parallel windings.Each secondary winding is coupled to the same primary winding.Therefore, the ampere-turns generated by the secondary winding current are equal to the ampere-turns generated by the primary winding (ignoring the excitation current).This characteristic is particularly useful for parallel rectifier circuits.Winding current distribution is equal, in parallel rectifier circuit does not need the equal resistance or other components.

(2) high current density

High frequency transformers have excellent temperature rise characteristics.Because of these characteristics, it can achieve high current density in very small packages.

(3) efficiency

By adjusting the leakage inductance so that it can have a very fast switching time, very low cross loss, it can achieve very high efficiency.The transmission loss between the secondary side winding and the primary side winding is very small.

(4) high power density

Because of the small size of the high-frequency transformer element, it has excellent temperature dissipation characteristics, so it can be closely packaged with the related semiconductor devices and inductors to achieve high power density.It has a current density of up to 30A/ module.

(5) low cost

The whole high frequency transformer is made up of a small number of related cheap components, plus the assembly is very convenient, so the cost of the transformer is very low.

(6) save the cost of components connected to it

Because of its small leakage inductance and low switching loss, the stress applied to the components connected to it is reduced.Therefore, the components connected to it can use components with lower cost and lower power quota.