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TOP242-250 Datasheet(PDF) 27 Page - Power Integrations, Inc. |
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TOP242-250 Datasheet(HTML) 27 Page - Power Integrations, Inc. |
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27 / 52 page  TOP242-250 27 M 12/04 Function TOPSwitch-II TOPSwitch-GX Figures TOPSwitch-GX Advantages Switching Frequency Option (Y, R and F Packages) N/A* 66 kHz ±7% 14,15 • Lower losses when using RC and 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 ±2 kHz @ 66 kHz 9,46 • Reduces conducted EMI Frequency Reduction N/A* At a duty cycle below 10% 7 • Zero load regulation without dummy load • Low power consumption at no-load Remote ON/OFF N/A* Single transistor or optocoupler interface or manual switch 11,22,23, 24,25,26, 27,29,36, 37,38,39, 40 • Fast ON/OFF (cycle-by-cycle) • Active-on or active-off control • Low consumption in remote off state • Active-on control for fail-safe • Eliminates expensive in-line on/off switch • Allows processor controlled turn on/off • Permits shutdown/wake-up of peripherals via LAN or parallel port Synchronization N/A* Single transistor or optocoupler interface • Synchronization to external lower frequency signal • Starts new switching cycle on demand Thermal Shutdown 125 °C min. Latched Hysteretic 130 °C min. shutdown (with 75 °C hysteresis) • Automatic recovery from thermal fault • Large hysteresis prevents circuit board overheating Current Limit Tolerance ±10% (@ 25 °C) -8% (0 °C to 100 °C) ±7% (@ 25 °C) -4% Typical (0 °C to 100 °C)** • 10% Higher power capability due to tighter tolerance DRAIN Creepage at Package DIP 0.037” / 0.94 mm 0.137” / 3.48 mm • Greater immunity to arcing as a result of build-up of dust, debris and other contaminants SMD 0.037” / 0.94 mm 0.137” / 3.48 mm TO-220 0.046” / 1.17 mm 0.068” / 1.73 mm DRAIN Creepage at PCB for Y, R and F Packages 0.045” / 1.14 mm (R and F Package N/A*) 0.113” / 2.87 mm (performed leads) • Performed leads accommodate large creepage for PCB layout • Easier to meet Safety (UL/VDE) Table 4 (cont). Comparison Between TOPSwitch-II and TOPSwitch-GX. *Not available **Current limit set to internal maximum |
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