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LT4321 Datasheet(PDF) 5 Page - Linear Technology |
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LT4321 Datasheet(HTML) 5 Page - Linear Technology |
5 / 12 page LT4321 5 4321f For more information www.linear.com/LT4321 pin FuncTions IN12: Data Pair Input 1. In a PoE system, IN12 connects to the center tap of the transformer connected to pins 1 and 2 on an RJ45 connector. IN36: Data Pair Input 2. In a PoE system, IN36 connects to the center tap of the transformer connected to pins 3 and 6 on an RJ45 connector. IN45: Spare Pair Input 1. In a PoE system, IN45 connects to the center tap of the transformer connected to pins 4 and 5 on an RJ45 connector. IN78: Spare Pair Input 2. In a PoE system, IN78 connects to the center tap of the transformer connected to pins 7 and 8 on an RJ45 connector. TG12: Top-Side Gate Driver Output. TG12 pin pulls high with respect to IN12 when IN12 is greater than OUTP and IN36 is less than OUTN. TG36: Top-Side Gate Driver Output. TG36 pin pulls high with respect to IN36 when IN36 is greater than OUTP and IN12 is less than OUTN. TG45: Top-Side Gate Driver Output. TG45 pin pulls high with respect to IN45 when IN45 is greater than OUTP and IN78 is less than OUTN. TG78: Top-Side Gate Driver Output. TG78 pin pulls high with respect to IN78 when IN78 is greater than OUTP and IN45 is less than OUTN. BG12: Bottom-Side Gate Driver Output. BG12 pin pulls highwithrespecttoOUTNwhenIN36isgreaterthanOUTP and IN12 is less than OUTN. BG36: Bottom-Side Gate Driver Output. BG36 pin pulls highwithrespecttoOUTNwhenIN12isgreaterthanOUTP and IN36 is less than OUTN. BG45: Bottom-Side Gate Driver Output. BG45 pin pulls highwithrespecttoOUTNwhenIN78isgreaterthanOUTP and IN45 is less than OUTN. BG78: Bottom-Side Gate Driver Output. BG78 pin pulls highwithrespecttoOUTNwhenIN45isgreaterthanOUTP and IN78 is less than OUTN. EN: Enable, Active Low. Pull down to OUTN to enable ideal diode bridge mode. EN is internally pulled up to VENOC. Tie to OUTP if the application circuit uses the EN pin to enable ideal bridge mode. EN: Enable, Active High. Pull up to enable ideal diode bridge mode. EN is internally pulled down to OUTN. Tie to OUTN if the application circuit uses the EN pin to enable ideal bridge mode. OUTP: Positive Output Voltage. OUTP is the rectified voltage from which the LT4321 draws power. OUTN: Negative Output Voltage. OUTN is the negative rectified voltage. EXPOSED PAD: The exposed pad must be electrically connected to the OUTN pin. |
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