Premier Magnetics, Inc. Off-Line Switch Mode Transformer TSD-1305

The TSD-1305 Off-Line Switch Mode Transformer from Premier Magnetics, Inc. is designed for use with Power Integrations' PWR-TOP209PFI PWM switching regulator in flyback buck-boost configurations. It features a primary inductance of 10 mH at a frequency of 100 kHz and a turn ratio of 1:23.43 for the secondary to primary winding. The transformer supports a DC hot rail voltage range of 98 to 375 Vdc and provides a secondary output voltage of 5 Vdc at 10-50 mA, along with a bias output of 15 Vdc capable of delivering up to 120 mA. The TSD-1305 is constructed to meet reinforced insulation standards, with a dielectric strength of 3000 Vrms between primary and secondary windings and 600 Vrms between primary and bias. It is optimized for high efficiency, with the potential to achieve up to 90% efficiency in power throughput. The transformer is suitable for applications requiring isolated multiple outputs and is designed to meet stringent creepage requirements. This product is ideal for engineers looking for a reliable transformer solution in off-line power supply designs.