Rainbow-electronics MAX5940B Uživatelský manuál stáhnout pdf (Strana 10)

MAX5940A/MAX5940B

IEEE 802.3af PD Interface Controller

For Power-Over-Ethernet

10 ______________________________________________________________________________________

R1*

60V

68nF

UVLO

GND

GATE

RCLASS

PGOOD

DC-DC CONVERTER

PHY

GND

-48V

RJ-45

POWER-OVER

SPAIR PAIRS

GND

-48V

R2*

*R1 AND R2 ARE OPTIONAL AND WHEN USED, THEY MUST TOTAL 25.5kΩ AND REPLACE THE 25.5kΩ RESISTOR.

GND

V+

REG

OUT

GATE

DISC

25.5kΩ

SS_SHDN

MAX5014

MAX5940B

POWER-OVER

SIGNAL PAIRS

LOAD

REG

Typical Application Circuits

Application Circuit 1

Figure 4. PD with Power-Over-Ethernet (Power is Provided by Either the Signal Pairs or the Spare Pairs)

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Rainbow-electronics MAX5940B Uživatelský manuál Strana 10