Table of Contents

Introduction.....................................................................................................................................................1

Typical PoE Application...........................................................................................................................1

PoE Manager Features........................................................................................................................... 2

Chipset Features.....................................................................................................................................2

Applications.............................................................................................................................................2

1.

Functional Descriptions...........................................................................................................................5

1.1.

Digital Block Module.....................................................................................................................5

1.2.

PD Detection Generator............................................................................................................... 5

1.3.

Classification Generator............................................................................................................... 5

1.4.

Current Limiter..............................................................................................................................6

1.5.

Main Power MOSFET.................................................................................................................. 6

1.6.

10-Bit ADC................................................................................................................................... 6

1.7.

Power on Reset............................................................................................................................6

1.8.

Voltage Regulator.........................................................................................................................6

1.9.

Oscillator...................................................................................................................................... 6

1.10. SPI Communication......................................................................................................................6

2.

Electrical Specifications.......................................................................................................................... 7

2.1.

Absolute Maximum Ratings..........................................................................................................7

2.2.

Recommended Operating Conditions.......................................................................................... 7

2.3.

Immunity.......................................................................................................................................7

2.4.

Device Electrical Specifications....................................................................................................8

2.5.

Port Real-Time Protection............................................................................................................ 8

2.6.

Port Current Monitoring................................................................................................................ 9

2.7.

Port Voltage Monitoring.............................................................................................................. 10

2.8.

Main Voltage Monitoring.............................................................................................................10

2.9.

Temperature Monitoring............................................................................................................. 10

2.10. Digital Interface...........................................................................................................................11

2.11. Detection.................................................................................................................................... 11

2.12. Classification.............................................................................................................................. 12

3.

Pins....................................................................................................................................................... 13

3.1.

Pin Diagrams..............................................................................................................................13

3.2.

Pin Descriptions......................................................................................................................... 14

4.

Application Information..........................................................................................................................16

4.1.

Connection Check...................................................................................................................... 16

4.2.

PD Detection.............................................................................................................................. 16

4.3.

Legacy Detection........................................................................................................................16

4.4.

Classification.............................................................................................................................. 16

4.5.

Port Start-Up.............................................................................................................................. 16

4.6.

Over-Load Detection and Port Shut-Down.................................................................................17

4.7.

Disconnect Detection................................................................................................................. 17

4.8.

IC Thermal Monitoring................................................................................................................17

4.9.

Over-Temperature Protection..................................................................................................... 17

PD69208T4/PD69204T4/PD69208M

Datasheet

DS00003428C-page 3