Texas Instruments TPS54386 Evaluation Module TPS54386EVM TPS54386EVM Datenbogen
Produktcode
TPS54386EVM
www.ti.com
4
4 Test Set Up
4.1
Equipment
4.1.1
Voltage Source
4.1.2
Meters
4.1.3
Loads
4.1.4
Oscilloscope
4.1.5
Recommended Wire Gauge
4.1.6
Other
4 Test Set Up
VIN: The input voltage source (VIN) should be a 0-15 V variable dc source capable of 5 A
DC
. Connect VIN
to J1 as shown in
.
•
A1: 0-3 A
DC
, ammeter
•
V1: VIN, 0-15 V voltmeter
•
V2: VOUT1 0-6 V voltmeter
•
V3: VOUT2 0-4 V voltmeter
LOAD1: The Output1 Load (LOAD1) should be an electronic constant current mode load capable of 0-2
A
A
DC
at 5.0 V
LOAD2: The Output2 Load (LOAD2) should be an electronic constant current mode load capable of 0-2
A
A
DC
at 3.3 V
Oscilloscope: A digital or analog oscilloscope can be used to measure the ripple voltage on VOUT. The
oscilloscope should be set for 1-M
oscilloscope should be set for 1-M
Ω
impedance, 20-MHz bandwidth, ac coupling, 1-
µ
s/division horizontal
resolution, 10-mV/division vertical resolution for taking output ripple measurements. TP3 and TP4 or TP18
and TP19 can be used to measure the output ripple voltages by placing the oscilloscope probe tip through
TP3 or TP18 and holding the ground barrel to TP4 or TP19 as shown in
and TP19 can be used to measure the output ripple voltages by placing the oscilloscope probe tip through
TP3 or TP18 and holding the ground barrel to TP4 or TP19 as shown in
. For a hands free
approach, the loop in TP4 or TP19 can be cut and opened to cradle the probe barrel. Using a leaded
ground connection may induce additional noise due to the large ground loop area.
ground connection may induce additional noise due to the large ground loop area.
VIN to J1: The connection between the source voltage, VIN and J1 of HPA241 can carry as much as 5
A
A
DC
. The minimum recommended wire size is AWG #16 with the total length of wire less than 4 feet (2
feet input, 2 feet return).
J2 to LOAD1: The power connection between J2 of HPA241 and LOAD1 can carry as much as 2 A
DC
.
The minimum recommended wire size is AWG #18, with the total length of wire less than 2 feet (1 foot
output, 1 foot return).
output, 1 foot return).
J3 to LOAD2: The power connection between J3 of HPA241 and LOAD2 can carry as much as 2 A
DC
.
The minimum recommended wire size is AWG #18, with the total length of wire less than 2 feet (1 foot
output, 1 foot return).
output, 1 foot return).
Fan: This evaluation module includes components that can get hot to the touch, because this EVM is not
enclosed to allow probing of circuit nodes, a small fan capable of 200-400 lfm is recommended to reduce
component surface temperatures to prevent user injury. The EVM should not be left unattended while
powered. The EVM should not be probed while the fan is not running.
enclosed to allow probing of circuit nodes, a small fan capable of 200-400 lfm is recommended to reduce
component surface temperatures to prevent user injury. The EVM should not be left unattended while
powered. The EVM should not be probed while the fan is not running.
A 12-V Input, 5.0-V and 3.3-V Output, 2-A Non-Synchronous Buck Converter
8
SLUU286 – March 2008