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PD77728 Datasheet(PDF) 13 Page - Microchip Technology

Part # PD77728
Description  8-Port PoE PSE Manager
PDF  44 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

PD77728 Datasheet(HTML) 13 Page - Microchip Technology

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PD77728
Electrical Specifications
 Data Sheet
© 2024 Microchip Technology Inc. and its subsidiaries
DS00003920E - 13
3.4
Electrical Characteristics
If not specified under conditions, the minimum and maximum ratings listed in the following table
apply to the entire specified operating ratings of the device. Typical values stated are either by
design or by production testing at 25 °C ambient.
The following tables list the electrical characteristics of the device.
Table 3-5. Current and Power Consumption
Parameter
Symbol
Conditions
Min.
Typ.
Max.
Units
VMAIN current
IMAIN
Power on Reset (POR) threshold exceeded.
VMAIN > 12V
—
—
1.5
mA
VMAIN< POR threshold
0V < VMAIN ≤ 8V
VDD and VDDA not present
IC is non-operational
—
—
100
µA
VDD rail + VDDA rail current
IVDD + IVDDA
VMAIN = 55V, VDD = VDDA = 3.6V
—
—
30
mA
Table 3-6. Port Characteristics
Parameter
Symbol
Conditions
Min.
Typ.
Max.
Units
Port supported
continuous
current
IPORT_CONT
•
Single-Signature PD
•
VMAIN = 52V, port not in current limit
•
Class 8 with PCLASS_PD = 99.7W
•
Maximum unbalance
1.185
—
—
A
Power
dissipation
PDISS
All ports 4P Class 8 power (90W)
VMAIN = 52V VDD = VDDA = 3.3V
—
—
2.0
W
Total channel
resistance
RCH_ON
TA = 25 °C,
—
0.160
—
Ω
Port resistance RCH_OFF
RPORT connected, TJ = 25 °C
VPORT < 30V
50
60
70
kΩ
RPORT disconnected, TJ = 25 °C
—
1.8
—
MΩ
VPORT leakage
ILEAKAGE
VPORT_NEGx to AGND
—
—
5
µA
Port
capacitance
CPSE
Required: External X7R port capacitance
(typical capacitor values)
47
100
220
nF
CPD
Supported PD capacitance for IEEE
® 802.3bt
compliant detection
50
—
150
nF
Supported PD capacitance, non-compliant PD
detection
0.05
—
12.8
µF
Supported PD capacitance, inrush phase, IEEE®
802.3bt compliant
5
—
180
µF
Supported PD capacitance, inrush phase, not
IEEE® 802.3bt compliant
—
—
432
µF
Supported
output power
PPORT4P
2 ports power, connected to a single-signature
PD, VMAIN = 52V
—
—
100
W



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