Rainbow-electronics MAX5965B Manual do Utilizador descarregar pdf (Página 46)

MAX5965A/MAX5965B

High-Power, Quad, Monolithic, PSE Controllers

for Power over Ethernet

46 ______________________________________________________________________________________

MAX5965A

MAX5965B

-48V

GATE_

INTERNAL PULLDOWN

(MANUAL MODE)

100Ω

-48VRTN

FDT3612

100V, 120mΩ

SOT-223

SENSE_

OUT_

OFF

DET_

SDAIN

SDAOUT

SCL

DGND

OSC_IN

AUTO

MIDSPAN

AGND

INTERNAL PULLDOWN

(SIGNAL MODE)

0.5Ω

1N4448

1kΩ

1 OF 4 CHANNELS

1.8V TO 5V,

(REF TO DGND)

INT

RESET

3kΩ

180Ω

OPTIONAL BUFFER

INTERNAL

50kΩ PULLUP

4.7kΩ

1kΩ

1N4002

HPCL063L

OPTIONAL BUFFER

HPCL063L

VCCRTN

(3.3V)

SCL

SDA

SERIAL INTERFACE

3kΩ

ISOLATION

0.47μF

100V

SHD_

SINE WAVE

100Hz ±10%

PEAK AMPLITUDE 2.2V ±0.1V

VALLEY AMPLITUDE 0.2V ±0.1V

SMBJ

58CA

0.1μF 2.2MΩ

-48VOUT

0.1μF

75Ω

75Ω 75Ω

75Ω

1000pF

250VAC

RX1+

RX1-

TX1+

TX1-

RXT1

TXCT1

RD1+

RD1-

TD1+*

*USE HALO TG111-HRPE40NY OR

PULSE HX6015NL FOR HIGH POWER

TD1-

PHY

1/2 OF

H2005A

RJ–45

CONNECTOR

Applications Information

Figure 13. PoE System Block Diagram

1 2 ... 41 42 43 44 45 46 47 48 49 50 51 52

MAX5965A/MAX5965B 1

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