ncp1091 ON Semiconductor, ncp1091 Datasheet
ncp1091
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ncp1091 Summary of contents
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... NCP1091 offers a programmable under−voltage while the NCP1092 provide an auxiliary pin for applications supporting auxiliary supplies. The NCP1090, NCP1091 and NCP1092 are fabricated in a robust high voltage process and integrates a rugged vertical N−channel DMOS suitable for the most demanding environments and capable of withstanding harsh environments such as hot swap and cable ESD events ...
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... Figure 1. NCP1090/91/92 Functional Block Diagram INTERNAL SUPPLY & VOLTAGE REFERENCE VPORT MONITOR (AUX supply priority) HOT SWAP SWITCH POWER GOOD INDICATOR LIMIT BLOCKS http://onsemi.com 2 THERMAL SHUTDOWN UVLO EXTERNAL UVLO SELECTION NCP1091 only IEEE Interface Shutdown AUX NCP1092 only PGOOD RTN ...
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... Pairs DB1 DB2 Spare Pairs Figure 2. Typical Application Circuit using the NCP1090 RJ−45 Data DB1 Pairs DB2 Spare Pairs Figure 3. Typical Application Circuit using the NCP1091 with External UVLO Setting VPORTP Rdet DET Rclass CLASS NCP1090 Rinrush INRUSH NC VPORTN VPORTP Rdet ...
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... Table 1. PIN DESCRIPTION Pin No. NCP1090 NCP1091 Name INRUSH 1 1 CLASS 2 2 DET 3 3 VPORTN 4 4 RTN 5 5 PGOOD − UVLO − 7 AUX − − VPORTP 8 8 Operating Conditions Table 2. ABSOLUTE MAXIMUM RATINGS Symbol Parameter VPORTP Input power supply RTN ...
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... Default turn on voltage Vuvlo_off Default turn off voltage Vhyst_int UVLO internal hysteresis Uvlo_filter UVLO On / Off filter time UVLO − EXTERNAL SETTING – NCP1091 ONLY Vuvlo_pr UVLO external programming range Vuvlo_on2 External UVLO turn on voltage Vhyst_off2 External UVLO turn off voltage Uvlo_ipd UVLO internal pull down current AUXILIARY SUPPLY SETTING – ...
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Table 3. OPERATING CONDITIONS Symbol Parameter PASS−SWITCH AND CURRENT LIMITING Ron Pass−switch Rds−on I_inrush Inrush current with Rinrush = 178 kW I_ilim Operating current limit with Rinrush = 178 kW POWER GOOD INDICATOR Vds_pgood_on RTN−VPORTN threshold voltage required for power ...
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... The NCP1091 offers a fixed or adjustable Vuvlo_on threshold depending if the UVLO pin is used or not. In Figure 5, the UVLO pin is strapped to ground and the Vuvlo_on threshold is defined by the internal level ...
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... Uvlon_on level The external UVLO hysteresis on the NCP1091 is about 15 percent typical. Inrush and Operational Current Limitations Both inrush and operational current limit are defined by an external Rinrush resistor connected between INRUSH and VPORTN ...
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VPORTP Rdet DET Rclass CLASS Rinrush INRUSH VPORTN Auxiliary Supply To support application connected to non−PoE enabled networks and minimize the bill of materials, the NCP1093 supports drawing power from an external supply and allows simplified designs with PoE or ...
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... VAUX (+) VPORTP Rdet DET Rclass CLASS Rinrush INRUSH AUX VPORTN VAUX (−) Figure 10. PoE Supply Dominant PD Interface Company or Product Inquiries For more information about ON Semiconductor’s Power over Ethernet http://www.onsemi.com. http://onsemi.com 10 D1 PGOOD To DC−DC Converter NCP1092 RTN products ...
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PACKAGE DIMENSIONS SOIC−8 CASE 751AZ−01 ISSUE O http://onsemi.com 11 ...
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... Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. PUBLICATION ORDERING INFORMATION LITERATURE FULFILLMENT: Literature Distribution Center for ON Semiconductor P.O. Box 5163, Denver, Colorado 80217 USA Phone: 303−675−2175 or 800−344−3860 Toll Free USA/Canada Fax: 303− ...