GENERAL APPLICATION INFORMATION
Premier Magnetics Off-Line Switch Mode Transformers have been designed for use with Power Integrations, Inc. TOPXXX series of off-line PWM switching regulators in the Flyback Buck-Boost circuit configuration. This conversion topology can provide isolated multiple outputs with efficiencies up to 90%. Premiers Switching Transformers have been optimized to provide maximum power throughput.
The TOPXXX series from Power Integrations, Inc. are self contained upto 132KHz controlled PWM switching regulators. This series contains all necessary functions for an off-line switched mode control DC power source. These switching regulators provide a very simple solution to off-line designs. The inductors and transformer used with the PWR-TOPXXX are critical to the performance of the circuit. They define the overall efficiency, output power and overall physical size.
Below is a universal input high precision 15V @ 2 Amps (30 watt) application circuit utilizing Power Integrations PWR TOP226 switching regulator in the flyback buck-boost configuration. The component values listed are intended for reference purposes only. The soft start capacitor Css is optional depending on the specific application. Simpler topology is possible depending on the line/load regulation required.

* Designed for Use with Power Integrations ICs.
* Design Engineering Support Available.
* Designed to Meet UL1950/IEC950 Safety Standards.
* Multiple Configurations.