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TOP250RN-TL Datasheet(PDF) 15 Page - Power Integrations, Inc. |
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TOP250RN-TL Datasheet(HTML) 15 Page - Power Integrations, Inc. |
15 / 52 page TOP242-250 15 M 12/04 Typical Uses of LINE-SENSE (L) and EXTERNAL CURRENT LIMIT (X) Pins X F PI-2617-050100 DC Input Voltage + - D C S D S C CONTROL L C L X S F D PI-2618-081403 DC Input Voltage + - D S C CONTROL L 2 M Ω RLS VUV = IUV x RLS VOV = IOV x RLS For RLS = 2 MΩ VUV = 100 VDC VOV = 450 VDC DCMAX@100 VDC = 78% DCMAX@375 VDC = 38% PI-2510-040501 DC Input Voltage + - D M S C VUV = RLS x IUV For Value Shown VUV = 100 VDC RLS 6.2 V 2 M Ω 22 k Ω CONTROL PI-2620-040501 DC Input Voltage + - D S C CONTROL L 2 M Ω 30 k Ω RLS 1N4148 VOV = IOV x RLS For Values Shown VOV = 450 VDC X PI-2623-092303 DC Input Voltage + - D S C RIL For RIL = 12 kΩ ILIMIT = 69% See Figure 54b for other resistor values (RIL) For RIL = 25 kΩ ILIMIT = 43% CONTROL X PI-2624-040501 DC Input Voltage + - D S C 2.5 M Ω RLS 6 k Ω RIL 100% @ 100 VDC 63% @ 300 VDC ILIMIT = ILIMIT = CONTROL Figure 16. Three Terminal Operation (LINE-SENSE and EXTERNAL CURRENT LIMIT Features Disabled. FREQUENCY Pin Tied to SOURCE or CONTROL Pin). Figure 17. Line-Sensing for Under-Voltage, Overvoltage and Line Feed-Forward. Figure 20. Externally Set Current Limit. Figure 21. Current Limit Reduction with Line Voltage. Figure 18. Line-Sensing for Under-Voltage Only (Overvoltage Disabled). Figure 19. Linse-Sensing for Overvoltage Only (Under-Voltage Disabled). Maximum Duty Cycle Reduced at Low Line and Further Reduction with Increasing Line Voltage. |
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