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General Configuration and Description

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3 General Configuration and Description

3.1 Physical Access

Table 1 lists the TPS2540EVM-623 connector functionality, Table 2 describes the test point availability

and Table 3 describes the jumper functionality.

Table 1. Connector Functionality

Connector Label Description

J1 AUX Auxiliary high current input connector.

J2 USB INPUT USB input port.

J3A (UPPER) Primary charging port (with data).

J3B (LOWER) Auxiliary charging port (no data).

D1 (RED) FAULT Fault LED

D2 (GREEN) VOUT-ON USB Output Powered

S1 S1 Mode switch used in conjunction with Table 4

Table 2. Test Points

Test Point Color Label Description

TP3 RED IN Power bus input.

TP4 RED VOUT Power bus output.

TP5 SM TP3 Power bus GND.

TP1 WHT DP-OUT Data+ out

TP2 WHT DM-OUT Data- out

TP6 SM TP5 Power bus GND

TP7

(1)

ORG DP-IN Data+ in

TP8

(1)

ORG DM-IN Data- in

(1)

TP7 and TP8 are isolated from U1 DP_IN (U1-11) and DM_IN (U1-10) respectively with 1MΩ resistors to minimize degradation

of high speed signal quality. Static voltage measurements of U1 DP_IN or DM_IN through TP7 and TP8 will be affected by the

loading of the test instrument and 1MΩ resistors.

Table 3. Jumpers

Jumper Label Description

JP1 VIN Power bus input. Install shunt to allow charger source to power TPS2540/1 and downstream circuitry.

JP2 VOUT Power bus output. Install shunt to allow charger source to power downstream devices.

JP3 CTL3 CTL3. See MODE truth table

JP4 CTL2 CTL2. See MODE truth table

JP5 CTL1 CTL1. See MODE truth table

JP6 EN TPS2540/40A/41/41A Enable select. Install shunt to disable TPS2540/40A/41/41A (also discharges the output capacitor for

TPS2541/41A).

JP7 ILIM ILIM select. Install shunt to select ILIM0 (2.43A typical ILIM). Remove shunt to select ILIM1 (1.21A typical ILIM).

The CTL pins configure the device mode. Setting S1 to the CDP position (open) is equivalent to setting

the CTL pins to the state in the last row of Table 4. Setting S1 to the DIS/SDP/DCP position allows the

remaining rows to be configured.

Table 4. TPS2540/40A Mode Truth Table

CTL1 (JP5) CTL2 (JP4) CTL3 (JP3) Mode

0 0 0 OUT discharge, power switch OFF

0 X 1 Dedicated Charging Port, Auto-detect

X 1 0 Standard Downstream Port, USB 2.0 Mode

1 0 0 Dedicated Charging Port, BC Specification 1.1 only

TPS2540EVM-623: Evaluation Module for TPS2540/40A and TPS2541/41A SLVU401B– September 2010– Revised August 2011

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