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General Configuration and Description
5 General Configuration and Description
5.1 Physical Access
Table 2 lists the TPS2379EVM connector functionality, Table 3 describes the test point availability and
Table 4 describes the jumper functionality.
Table 2. Connector Functionality
Connector Label Description
Power over ethernet (POE) input. Connect to power sourcing equipment (PSE) power and data
J1 PWR+DATA
source.
J2 DATA Ethernet data pass through. Connect to downstream ethernet device.
Output connector to load. Connect pin #4 (VDD) to positive input and pin #1 (RTN) to low side of
J4 J4 load. Pin #2 (CDB) can be used to inhibit the converter while the TPS2379 output is ramping up. Pin
#3 (T2P) can be used to notify the load of when high power source is present.
D1 (RED) T2P T2P (type 2 PSE) LED. When ON this indicates that a type 2 PSE is detected.
D2 (GREEN) ON TPS2379 Output Powered.
Table 3. Test Points
Test Point Color Label Description
TP6 WHT GATE Gate output to external MOSFET
TP3 RED PAIR12 Data pair from pins 1 and 2 of J1
TP4 ORG PAIR36 Data pair from pins 3 and 6 of J1
TP5 RED PAIR45 Spare pair from pins 4 and 5 of J1
TP7 ORG PAIR78 Spare pair from pins 7 and 8 of J1
TP1 RED VDD High side output from bridge
TP2 WHT T2P Type 2 PSE output from TPS2379
TP9 BLK RTN Switched low side from TPS2379
TP8 WHT CDB Converter disable output from TPS2379
TP11 BLK VSS Low side output from bridge
TP10 SM EGND Earth or chassis ground point
TP12 BLK ESNS External MOSFET current sense point
Table 4. Jumpers
Jumper Label Description
J3 J4 LED bias jumper. Install to furnish LED bias for T2P and ON LED’s
J5 J5 Switched output return bypass jumper.
This jumper can be used to switch in alternate non-standard detection resistors. When
J6 XDEN the shunt is removed, the standard 24.9kΩ is used and when the shunt is installed, the
detection resistance is ~12.5kΩ
This jumper can be used to switch in alternate non-standard classification resistors.
J7 XCLS When the shunt is removed, the standard class 4 63.4Ω (40mA) resistor is used and
when the shunt is installed, the classification resistance is ~37.4Ω (68mA).
5
SLVU687March 2012 TPS2379 EVM User’s Guide
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