PD69101 datasheet(12/30 Pages) MICROCHIP

12 / 30 page

Table 2-5. LED0 and LED1 Drivers

Parameter

Symbol

Typical

Maximum

Unit

Current sink

ISINK (from VMAIN to

AGND)

2.1

Dynamic Characteristics

The PD69101 device utilizes three current level thresholds (IMIN, ICUT, and ILIM) and three timers (TMIN, TCUT, and

TLIM).

• Loads that consume ILIM current for more than TLIM are labeled as short circuit state and shut down.

• Loads that dissipate more than ICUT for longer than TCUT are labeled as overloads and are shut down.

• If output power is below IMIN for more than TMIN, the PD is labeled as no load and is shut down.

Automatic recovery from overload and no load conditions is attempted every TOVLREC periods (typically one

second). Output power is limited to ILIM, which is a maximum peak current allowed at the port.

Table 2-6. IEEE 802.3 af Mode Parameters

Parameter

Symbol Conditions

Minimum Typical Maximum Unit

Automatic recovery from no

load shutdown

—

TUDLREC value, measured from port

shutdown point (can be modified

through control port)

—

sec

Cutoff timer accuracy

—

Typical accuracy of Tcut

—

Inrush current

IInrsh

For t = 50 ms, Cload = 180 μF (max)

400

—

450

Output current operating

range

IPORT

Continuous operation after startup

period

—

375

Output power available

operating range

PPORT

Continuous operation after startup

period, at port output

0.57

—

15.4

Off-mode current

IMIN1

Must disconnect for T greater than

TUVL

—

IMIN1

May or may not disconnect when T is

greater than TUVL

7.5

PD power maintenance

request drop-out time limit

TPMDO

Buffer period to handle transitions

300

—

400

Over-load current detection

range

ICUT

Time limited to TOVL

350

—

400

Over-load time limit

TOVL

—

Turn-on rise time

TRISE

From 10% to 90% of Vport (specified

for PD load consisting of 100 μF

capacitor in parallel to 200 Ω)

—

μs

Turn-off time

TOFF

From VPORT to 2.8 VDC

—

500

Time maintain power

signature

TMPS

DC modulation time for DC

disconnect

—

PD69101

Electrical Specifications

and its subsidiaries

Datasheet

DS00004280A-page 12

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