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TOP232G Datasheet(PDF) 19 Page - Power Integrations, Inc. |
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TOP232G Datasheet(HTML) 19 Page - Power Integrations, Inc. |
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19 / 36 page  TOP232-234 B 7/01 19 Key Application Considerations TOPSwitch-FX vs. TOPSwitch-ll Table 3 compares the features and performance differences between TOPSwitch-FX and TOPSwitch-II. Many of the new features eliminate the need for costly discrete component. Other features increase the robustness of design allowing cost savings in the transformer and other power components. *Not available Table 3. Comparison Between TOPSwitch-II and TOPSwitch-FX. (continued on next page) Function TOPSwitch-II TOPSwitch-FX Figures 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 • Minimizes output overshoot External Current Limit N/A* Programmable 8, 17, • Smaller transformer 100% to 40% of 18, 21, • Higher efficiency default current 22 • Allows tighter power limit limit during output overload conditions DC MAX 67% 78% 4 • 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 N/A* 78% to 38% 4, 8, 14, • Rejects line ripple DC MAX Reduction 23 • Increases transient and surge voltage withstand capability Line OV Shutdown N/A* Single resistor 8, 14, • Increases voltage withstand cap- programmable 16, 23 ability against line surge Line UV Detection N/A* Single resistor 5, 8, 14, • Prevents auto-restart glitches programmable 15, 23 during power down Switching Frequency 100 kHz ±10% 132 kHz ±7% 10 • Smaller transformer • Fundamental below 150 kHz for conducted EMI Switching Frequency N/A* 66 kHz ±7% 11, 12 • Lower losses when using RC and Option (TO-220 only) RCD snubber for noise reduction in video applications • Allows for higher efficiency in standby mode • Lower EMI (second harmonic below 150 kHz) Frequency Jitter N/A* ±4 kHz@132 kHz 6, 28 • Reduces conducted EMI ±2 kHz@66 kHz Cycle Skipping N/A* At DC MIN (1.5%) 4 • Zero load regulation without dummy load • Low power consumption at no load |
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Similar Description - TOP232G |
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