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................................................................................................................ 9

2.8.

Main Voltage Monitoring...............................................................................................................9

2.9.

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

2.10. Digital Interface.......................................................................................................................... 10

2.11. Detection.................................................................................................................................... 10

2.12. Classification.............................................................................................................................. 11

3.

Pins....................................................................................................................................................... 12

3.1.

Pin Diagrams..............................................................................................................................12

3.2.

Pin Descriptions......................................................................................................................... 13

4.

Application Information..........................................................................................................................15

4.1.

PD Detection.............................................................................................................................. 15

4.2.

Legacy Detection........................................................................................................................15

4.3.

Classification.............................................................................................................................. 15

4.4.

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

4.5.

Over-Load Detection and Port Shut-Down.................................................................................16

4.6.

Disconnect Detection................................................................................................................. 16

4.7.

IC Thermal Monitoring................................................................................................................16

4.8.

Over-Temperature Protection..................................................................................................... 16

4.9.

VMAIN Out-of-Range Protection.................................................................................................. 16

PD39208

Datasheet

DS00003555B-page 3