Texas Instruments Evaluation Module for TPS2554 TPS2554EVM-010 TPS2554EVM-010 Datenbogen
Produktcode
TPS2554EVM-010
General Configuration and Description
3
General Configuration and Description
3.1
Physical Access
lists the TPS2554/5EVM connector functionality, and
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).
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
). 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,
the variation of ILIM. For exact variation of ILIM, see the TPS2554/TPS2555 data sheet,
.
IOS = 48000 / R
ILIMx
= 2 A
R
ILIMx
= 48000 / IOS = 48000 / 2 = 24000
Ω
Choose R
ILIMx
= 23.7 k
Ω
IOS = 48000 / 23700 = 2.03 A
3.3
Test Setup
shows a typical test setup for TPS2554/5EVM.
4
TPS2554 and TPS2555 Evaluation Module
SLVU462
–
June 2011
Copyright
©
2011, Texas Instruments Incorporated