Texas Instruments TPS53128, Руководство пользователя

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5 Test Setup
5.1 Equipment
5.1.1 Voltage Source
The input voltage source (V
IN
) is a 0-V to 25-V variable DC source capable of supplying 3.0 A
DC
minimum.
5.1.2 Meters
A1: 0 A
DC
to 5 A
DC
, ammeter
V1: V
IN
, 0-V to 25-V voltmeter
V2: V
OUT1
, 0-V to 2-V voltmeter
V3: V
OUT2
, 0-V to 2-V voltmeter
5.1.3 Loads
LOAD1 – One output load is an electronic load set for constant current mode capable of 0 A
DC
to 4 A
DC
at 1.05
V
DC
.
LOAD2 – The other output load is an electronic load set for constant current mode capable of 0 A
DC
to 4 A
DC
at
1.8 V
DC
.
5.1.4 Oscilloscope and Probe
The oscilloscope, analog or digital, must be set for AC-coupled measurement with 20-MHz bandwidth limiting.
Use 20-mV/division vertical resolution and 1.0-µse /division horizontal resolution for the output ripple voltage
test.
Oscilloscope probes with exposed conductive ground barrels are recommended.
5.1.5 Recommended Wire Gauge
V
IN
to J3 – The connection between the source voltage VIN and J1 of TPS53128EVM-620 can carry as much as
2 A
DC
. The minimum recommended wire size is AWG #16 with the total length of wire less than two feet (1-foot
input, 1-foot return).
J1 to LOAD1 and J2 to LOAD2 – The connection between J1 and LOAD1 and J2 and LOAD2 of
TPS53128EVM-620 can carry as much as 4 A
DC
each. The minimum recommended wire size is AWG #14
with the total length of wire less than two feet (1-foot input, 1-foot return).
5.1.6 Other Test Equipment
FAN – The TPS53128EVM-620 evaluation module includes components that can get hot to touch. Because this
EVM is not enclosed to allow probing of circuit nodes, a small fan capable of 200lfm–400 lfm is recommended to
reduce component temperatures when operating.
5.2 Recommended Setup
Figure 5-1 shows the recommended test setup to evaluate the TPS53128EVM-620. Working at an ESD
workstation, make sure that any wrist straps, bootstraps, or mats are connected referencing the user to earth
ground before power is applied to the EVM. Electrostatic smock and safety glasses also are recommended.
Test Setup www.ti.com
8 TPS53128 Buck Controller Evaluation Module User's Guide SLVU433A – FEBRUARY 2011 – REVISED JANUARY 2022
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