Introduction
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2
SLVUB75A – August 2017 – Revised September 2017
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TPS2372-4EVM-006 Evaluation Module
1
Introduction
The TPS2372-4EVM-006 allows reference circuitry evaluation of the TPS2372-4. It contains input and
output power connectors and an array of on-board test points for circuit evaluation.
1.1
Features
The TPS2372-4EVM-006 features include:
•
High-power PoE
•
Selectable classification
•
Adjustable auto MPS
•
Gigabit Ethernet pass-through interface
1.2
Applications
The TPS2372-4EVM-006 can be used in the following applications:
•
Power-over-Ethernet (PoE) lighting
•
Internet of Things (IoT)
•
PoE modules
2
Electrical Specifications
Table 1
lists the EVM electrical specifications.
Table 1. TPS2372-4EVM-006 Electrical and Performance Specifications at 25°C
Parameter
Test Conditions
Min
Typ
Max
Unit
Power Interface
Input voltage
Applied to the power pins of connectors
J2 or J4
0
57
V
Input UVLO, PoE input J1
Rising input voltage
36
V
Falling input voltage
30
V
Detection voltage
At device terminals
3
10
V
Classification voltage
At device terminals
10
23
V
Classification current
RclassA = 63.4
Ω
38
42
mA
RclassB = 90.9
Ω
26.5
29.3
mA
Inrush current-limit
275
395
mA
Operating current-limit
1.9
2.5
A
Adatper voltage
42.5
57
V
3
Description
The TPS2372-4EVM-006 enables full evaluation of the TPS2372-4 device, see the schematic in
Figure 1
.
Ethernet power is applied from J1 and is dropped to the FET bridge rectifier. At the output of the FET
bridge is the EMI/EMC filter and transient protection for the TPS2372-4.
Input power can also be applied at J3 from a DC source when power at J1 is not present.
The TPS2372-4 (U1) PD controller is shown in
Figure 1
. R23 provides the detection signature. To the right
of U2 is the switched side of the PD controller. The TPS2372-4 RTN pin provides inrush limited turn on
and the charge of the bulk capacitor C11.