IEEE 802.3af/at PD Front End IC

Microsemi Proprietary and Confidential. PD70100/PD70200 Datasheet Revision 3.0

10

4.2.4

Mark

Table 6 • Mark

Parameter

Symbol

Min

Typ

Max

Units

Test Conditions/Comment

Mark, Working Voltage Range

VMARK

4.9

10.1

V

When voltage decreases

Measured between V to VPN

PP

IN

Mark Current

IMARK

0.25

4

mA

Chip current

4.2.5

Isolation Switch

Table 7 • Isolation Switch

Parameter

Symbol

Min

Typ

Max

Units

Test Conditions/Comment

Isolation Switch MOSFET Switches

from Off to ILIM-LOW

VSW-START

36

42

V

Isolation Switch MOSFET Switched

Off

VSW-OFF

30.5

34.5

V

Startup Current Limit, ILIM

ILIM-LOW

105

240

325

mA

VPN to VPN

Threshold Voltage

IN

OUT

for I

to I

Switchover

LIM- LOW

LIM-HIGH

VDIFF

0.7

V

When VPN to VPN

≤ V

IN

OUT

DIFF

, Isolating switch switches

over from I

to I

.

LIM-LOW

LIM-HIGH

Over Current Protection Current

Limit

OCP

1500

1800

2000

mA

Continuous Operation Load

Current (PD70100)

ILOAD

350

450

mA

Isolating switch at ILIM-HIGH

Continuous Operation Load

Current (PD70200)

600

1123

Continuous Operation Total RDSON

SW-RDSON

0.6

Ω

Total resistance between

VPN and VPN

Isolating

IN

OUT

switch at ILIM-HIGH

4.2.6

DC/DC Capacitor Discharger

Table 8 • DC/DC Capacitor Discharger

Parameter

Symbol

Min

Typ

Max

Units

Test Conditions

/Comment

DC/DC Input Capacitance

220

µF

For reference only

Guaranteed by design

(not tested in

production)

Discharge Current

22.8

32

50

mA

7.0V ≤ V to VPN

≤

PP

OUT

30 V

Full Discharge Time for Full Discharge of Input

Capacitance

TDSC

500

ms

V < UVLO threshold

PP

Guaranteed by design

(not tested in

production)