Premier Magnetics, Inc. Off-Line Switch Mode Transformer TSD-1135

The TSD-1135 Off-Line Switch Mode Transformer from Premier Magnetics, Inc. is specifically 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 at up to 120 mA. The TSD-1135 is built 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 designed for universal input voltage from 85 to 265 Vac and offers line regulation of 1% and load regulation of 3%. The transformer is optimized for high efficiency, achieving up to 90% in power throughput, making it suitable for applications requiring isolated multiple outputs. Its compact design and compliance with UL and IEC standards make it a reliable choice for engineers looking for a switching transformer in their power supply designs.