The power transformer TOP 257 12-4 is used to convert electrical energy, to the galvanic isolation of electrical circuits. The application of these transformers is the network sources of secondary power based on integrated circuit TOP257 of the ТОРSwitch series manufactured by Power Integration company.
SPECIFICATION
| 220V±15% | |
| 12V | |
| 4A | |
| 133kHz | |
| -10 ... +85°С |
| Characteristics | Unit of measurement | Value | Note |
| Inductance of the primary winding | mH | 251… 307 | * |
| Turns ratio | p.u. | 8,5 … 8,7 (I/II) 14,15 … 14,5 (I/III) |
* |
| Output power, max | W | 48 | |
| Electric strength of insulation | kV | 3 | |
| Electric resistance of insulation | MΩ | 100 |
The values marked in the table with "*" for modifications of the product (for power supplies with other input and output parameters) may differ from those listed.
In agreement with the customer modifications of the transformer TOP 257 12-4 for power supplies with other input and output parameters (within the output power of 50 W) can be made.
Also, products can be supplied with the engineering documentation in the required amount.
Drawing
The transformer is made on the basis of Е25/13/7 core with a horizontal coil former and 10 pins.
Electrical schematic
