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TOP246YN-TL Datasheet(PDF) 26 Page - Power Integrations, Inc. |
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TOP246YN-TL Datasheet(HTML) 26 Page - Power Integrations, Inc. |
26 / 52 page ![]() TOP242-250 M 12/04 26 Function TOPSwitch-II TOPSwitch-GX Figures TOPSwitch-GX Advantages Soft-Start N/A* 10 ms • Limits peak current and voltage component stresses during start- up • Eliminates external components used for soft-start in most applications • Reduces or eliminates output overshoot External Current Limit N/A* Programmable 100% to 30% of default current limit 11,20,21, 24,25,27, 28,34,35, 38,39 • Smaller transformer • Higher efficiency • Allows power limiting (constant overload power independent of line voltage) • Allows use of larger device for lower losses, higher efficiency and smaller heatsink DC MAX 67% 78% 7 • Smaller input cap (wider dynamic range) • Higher power capability (when used with RCD clamp for large V OR) • Allows use of Schottky secondary rectifier diode for up to 15 V output for high efficiency Line Feed-Forward with DC MAX Reduction N/A* 78% to 38% 7,11,17, 26,27,28, 31,40 • Rejects line ripple Line OV Shutdown N/A* Single resistor programmable 11,17,19, 26,27,28 31,33,40 • Increases voltage withstand capability against line surge Line UV Detection N/A* Single resistor programmable 11,17,18, 26,27,28, 31,32,40 • Prevents auto-restart glitches during power down Switching Frequency 100 kHz ±10% 132 kHz ±6% 13,15 • Smaller transformer • Below start of conducted EMI limits Table 4. Comparison Between TOPSwitch-II and TOPSwitch-GX (continued on next page). *Not available Key Application Considerations TOPSwitch-II vs. TOPSwitch-GX Table 4 compares the features and performance differences between TOPSwitch-GX and TOPSwitch-II. Many of the new features eliminate the need for additional discrete components. Other features increase the robustness of design, allowing cost savings in the transformer and other power components. |
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