Test Setup and Results
4
SNVU602 – May 2019
Copyright © 2019, Texas Instruments Incorporated
TPS54240EVM-VSON Regulator Evaluation Module
Table 2. TPS54240EVM-VSON Performance Specification Summary
SPECIFICATION
TEST CONDITIONS
MIN
TYP
MAX
UNIT
V
IN
voltage range
7
12
24
V
Output voltage set point
3.3
V
Output current range
V
IN
= 10 V to 20 V
0
2.5
A
Load regulation
V
IN
= 12 V, I
OUT
= 0.001 A to 2.5 A
±0.06%
Load transient response
I
OUT
= 0.5 A to 2.5 A
Voltage change
–30
mV
Recovery time
1
ms
I
OUT
= 2.5 A to 0.5 A
Voltage change
40
mV
Recovery time
1
ms
Loop bandwidth
V
IN
= 12 V, I
OUT
= 2.5 A
36.9
kHz
Phase margin
V
IN
= 12 V , I
OUT
=2.5 A
64
°
Input ripple voltage
I
OUT
= 2.5 A
320
mVpp
Output ripple voltage
I
OUT
= 2.5 A
20
mVpp
Slow start time
3
ms
Operating frequency
500
kHz
Peak efficiency
TPS54240EVM-VSON, V
IN
= 12 V, I
OUT
= 0.7 A
87.7%
CCM/DCM boundary
V
IN
= 12 V
0.4
A
Eco-mode™ threshold
V
IN
= 12 V
45
mA
2
Test Setup and Results
This section describes how to properly connect, set up, and use the TPS54240EVM-VSON evaluation
module. The section also includes test results typical for the evaluation module and covers efficiency,
output voltage regulation, load transients, loop response, output ripple, input ripple, and start-up.
2.1
Input/Output Connections
The TPS54240EVM-VSON is provided with input/output connectors and test points as shown in
.
See
for the location of the connectors. A power supply capable of supplying 2.5 A must be
connected to J1 and J3 through a pair of 20 AWG wires. The load must be connected to J2 and J3
through a pair of 20 AWG wires. The maximum load current capability must be 2.5 A. Wire lengths must
be minimized to reduce losses in the wires. Test-point TP1 provides a place to monitor the V
IN
input
voltages with TP3 providing a convenient ground reference. TP2 is used to monitor the output voltage with
TP4 as the ground reference.