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5
Test Setup
5.1
Test Equipment
Voltage Source: Input DC source, the input voltage source (VIN) shall be a 0-V to 15-V variable DC
source capable of 10 A
Multimeters: Five Multimeters
1. Volt meter, V1, 0 V
2. Volt meter, V2, 0 V
3. Volt meter, V3, 0 V
4. Current meter, A1, 0 A
voltmeter and a 1-mV/A shunt)
5. Current meter, A2, 0 A
voltmeter and a 1-mV/A shunt)
Output Load: Loads, LOAD1 shall be an Electronic Constant Current Mode Load capable of 0 A
A
at 1.2 V. LOAD2 shall be an Electronic Constant Current Mode Load capable of 0 A
DC
V.
Oscilloscope: A digital or analog oscilloscope can be used to measure the ripple voltage on VOUT. The
oscilloscope should be set for 20-MHz bandwidth, AC coupled. Test points TP3 and TP4 can be used to
measure VOUT1 and test points TP13 and TP14 can be used to measure VOUT2. Use the tip and barrel
method shown in
Figure 3
result from using the probe's ground lead.
Recommended Wire Gauge:
•
VIN to J1: The connection from VIN to the J1 connector of the EVM can carry as much as 5 A
wire gauge shall be 18 AWG minimum and no longer than two feet for each connection, VIN+ to J1+,
and VIN- to J1-.
•
J2 to LOAD1: The connection from J2 of the EVM to LOAD1 can carry as much as 10 A
gauge shall be 14 AWG minimum and no longer than two feet for each connection, J2+ to LOAD1+,
and LOAD1- to J2-.
•
J3 to LOAD2: The connection from J3 of the EVM to LOAD2 can carry as much as 10 A
gauge shall be 14 AWG minimum and no longer than two feet for each connection, J3+ to LOAD2+,
and LOAD2- to J3-.
5.2
Recommended Test Setup
Shown in
Figure 2
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 should also be worn.
SLUU506 – June 2011
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. Connect VIN to J1 as shown in
DC
to 5 V
.
DC
DC
to 5 V
.
DC
DC
to 15 V
.
DC
DC
to 10 A
. (Optional: to improve current measurement use a 0-mV to 100-mV
DC
DC
to 10 A
. (Optional: to improve current measurement use a 0-mV to 100-mV
DC
DC
to avoid inducing additional noise due to the large ground loop area that would
is the basic test set up recommended to evaluate the TPS40322EVM-679.
Copyright © 2011, Texas Instruments Incorporated
Figure
2.
Dual Output Synchronous Buck Converter
Test Setup
to 10
DC
to 10 A
at 1.8
DC
DC
. The
DC
. The wire
DC
. The wire
DC
5
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