Datasheet

General Configuration and Description

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Table 2. Connector Functionality

Connector Label Description

J7 ADAPTER External adapter input. J10 (low side) and J11 (high side) can select whether the adapter

is at the PD controller input (VDD to VSS) or at the converter input (VDD1 to RTN). J8 is

used to select PPD or APD function. J9 along with J8 set to PPD can select the PPD1 or

PPD2 function.

J1 VOUT Output voltage connector.

J4 DATA + PoE POWER Ethernet power input connector. Contains Ethernet transformer and cable terminations

J5 DATA PORT Ethernet data port connector

J6 EGND Earth GND connection

Table 3. Test Points

Test Point Color Label Description

TP2, TP16, TP17 BLK GND Secondary-side (output) grounds (GND)

TP4 RED VC DC/DC converter bias supply

TP5 ORG DRAIN Drain terminal of the primary-side switching MOSFET

TP9 BLK VSS POE input, low side

TP10, TP14 BLK RTN DC/DC converter return

TP12 ORG LOOP Can be used with TP11 for overall feedback loop measurements.

TP11 RED VOUT DC/DC converter output voltage.

TP13 WHT CTL Control loop input to the pulse width modulator

TP8 WHT RCS DC/DC converter primary-side switching MOSFET current sense (before external

slope comp resistor).

TP3 RED VB Bias voltage regulator

TP7 WHT GATE Gate drive for the primary-side switching MOSFET

TP6 WHT GAT2 Gate drive for the primary-side active clamp MOSFET

TP1 RED PVDD1 Transformer primary high side.

TP15 WHT T2P Type 2 PSE output from TPS23756

TP19 RED P78 Pair 7, 8

TP20 ORG P12 Pair 1, 2

TP18 ORG P45 Pair 4, 5

TP21 RED P36 Pair 3, 6

D11 GRN T2P Type 2 PSE indicator. Remove the shunt on J3 to inhibit the T2P indicator.

D12 RED POWER ON Output power indicator. Remove the shunt on J2 to inhibit the output power

indicator.

CL1 NA CL1 CL1 provides a connection between VDD and VDD1, shorting out D25. Removing

the short at CL1 allows certain power source priority schemes to be evaluated.

TPS23756EVM SLVU329A–September 2009–Revised March 2010

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