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DPA424 Datasheet(PDF) 13 Page - Power Integrations, Inc. |
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DPA424 Datasheet(HTML) 13 Page - Power Integrations, Inc. |
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13 / 36 page  DPA423-426 13 K 1/04 Figure 15. Externally Set Current Limit. Figure 16. Current Limit Reduction with Line Voltage. X PI-2836-011904 DC Input Voltage + - D S C R IL For RIL = 12 kΩ ILIMIT = 64% See Figure 34 for other resistor values (RIL) For RIL = 25 kΩ ILIMIT = 34% CONTROL X PI-2854-050602 DC Input Voltage + - D S C 363 kΩ R LS 4.2 kΩ R IL 100% @ 36 VDC 64% @ 72 VDC ILIMIT = ILIMIT = CONTROL Figure 17. Active-on (Fail Safe) Remote ON/OFF. Figure 18. Active-off Remote ON/OFF. Maximum Duty Cycle will be reduced. Figure 19. Active-on Remote ON/OFF with Externally Set Current Limit. Figure 20. Active-off Remote ON/OFF with Externally Set Current Limit. X ON/OFF 47 kΩ PI-2856-072602 DC Input Voltage + - D S C R IL Q R For RIL = 12 kΩ ILIMIT = 64% For RIL = 25 kΩ ILIMIT = 34% QR can be an optocoupler output or can be replaced by a MOSFET or manual switch. CONTROL PI-2857-050602 DC Input Voltage + - D S C CONTROL L 47 kΩ Q R R MC 37.4 kΩ QR can be an optocoupler output or can be replaced by a manual switch. ON/OFF X R IL For RIL = 12 kΩ ILIMIT = 64% For RIL = 25 kΩ ILIMIT = 34% PI-2855-050602 DC Input Voltage + - D S C CONTROL L 47 kΩ Q R R MC 37.4 kΩ QR can be an optocoupler output or can be replaced by a manual switch. ON/OFF X PI-2625-040501 DC Input Voltage + - D S C ON/OFF 47 KΩ QR can be an optocoupler output or can be replaced by a manual switch. Q R CONTROL Typical Uses of LINE-SENSE (L) and EXTERNAL CURRENT LIMIT (X) Pins (cont.) |
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