Copyright © 2016

Microsemi

Page 18

Rev. 1.4, July 2017

CPG

– PoE BU

One Enterprise Aliso Viejo, CA 92656 USA

PD70211

PD Controller with Switching Regulator for

AF/AT/UPOE/HDBaseT/4-pair PoE Applications

Symbol

Parameter

Conditions

Min

Typ

Max

Units

RSG_HI

Drive resistance when

SG is high

10

Ω

RSG_LO

Drive resistance when

SG is low

10

Ω

tDEAD

Deadtime

PG low to SG high or PG

high to SG low

60

110

190

ns

Logic Levels on VINS and ENABLE

VHI

Input high threshold

2

V

VLO

Input low threshold

0.8

V

Thermal Protection

TSD

Thermal shutdown

(rising)

157

°C

THYST

Thermal shutdown

hysteresis

15

30

°C

Thermal Protection

PD70211 is protected from excessive internal temperatures that may occur during various operating

procedures. Two temperature sensors are located on the chip, monitoring the temperatures of the

following:

 Isolating Switch (pass-FET)

 Classification Current Sink

Each of the over temperature sensor activates a protection mechanism that will disconnect the Isolation

(pass) FET or the classification circuit respectively. This protects the device from being permanently

damaged or even from long-term degradation.