Datasheet

General Configuration and Description

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3 General Configuration and Description

3.1 Physical Access

Table 1 lists the TPS2554/5EVM connector functionality, and Table 2 describes the test point availability.

Table 1. User Interface

Connector Label Description

J1 VIN Input connector

J2 VOUT Output connector

J3 J3 Input voltage jumper. Shunt can be removed to measure input current.

J4 J4 Output voltage jumper. Shunt can be removed to measure output current.

J5 EN Enable jumper. Leave open to enable TPS2554 and install shunt to enable TPS2555.

J6 ILIM_SEL Current limit select. Install shunt to select ILIM0 (2.4 A nominal), and remove shunt to

select ILIM1 (1.2 A nominal).

D1 (RED) FLT Fault LED

Table 2. Test Points

Test Point Color Label Description

TP3 RED IN Power switch input (IC side of J3 shunt)

TP4 BLK GND Power switch input ground

TP1 WHT FLT Fault pin output

TP2 RED VOUT Power switch output

TP5 BLK GND Power switch output ground

TP6 WHT EN Enable pin input

3.2 Current-Limit Setpoint

R4 and R5 configure the current-limit setpoint for ILIM0 and ILIM1, respectively (see J6 in Table 1). ILIM0

or ILIM1 setpoint can be adjusted using the following example by substituting R4 or R5 for R

ILIMx

. In this

example IOS = 2 A.

The following example is an approximation only and does not take into account the resistor tolerance or

the variation of ILIM. For exact variation of ILIM, see the TPS2554/TPS2555 data sheet, SLVSAM0.

IOS = 48000 / R

ILIMx

= 2 A

ILIMx

= 48000 / IOS = 48000 / 2 = 24000 Ω

Choose R

ILIMx

= 23.7 kΩ

IOS = 48000 / 23700 = 2.03 A

3.3 Test Setup

Figure 2 shows a typical test setup for TPS2554/5EVM.

TPS2554 and TPS2555 Evaluation Module SLVU462– June 2011

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