Texas Instruments 3A, 12V Input, Dual 5V and 3.3V Output Non-Synchronous SWIFT (tm) Buck Converter Evaluation Module TPS TPS55386EVM-363 Datenbogen
Produktcode
TPS55386EVM-363
4.1.6
Other
4.2
Equipment Setup
4.2.1
Procedure
Test Set UP
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The power connection between J2 of HPA241 and LOAD1 can carry as much as 2Adc. The minimum
recommended wire size is AWG #18, with the total length of wire less than 2 feet (1 foot output, 1 foot
return).
recommended wire size is AWG #18, with the total length of wire less than 2 feet (1 foot output, 1 foot
return).
J3 to LOAD2
The power connection between J3 of HPA241 and LOAD2 can carry as much as 2Adc. The minimum
recommended wire size is AWG #18, with the total length of wire less than 2 feet (1 foot output, 1 foot
return).
The power connection between J3 of HPA241 and LOAD2 can carry as much as 2Adc. The minimum
recommended wire size is AWG #18, with the total length of wire less than 2 feet (1 foot 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.
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.
Shown in
is the basic test set up recommended to evaluate the TPS55386EVM-363. Note that
although the return for J1, J2 and JP3 are the same system ground, the connections should remain
separate as shown in
separate as shown in
1. 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.
safety glasses should also be worn.
2. Prior to connecting the DC input source, V
IN
, it is advisable to limit the source current from V
IN
to 5.0A
maximum. Make sure V
IN
is initially set to 0V and connected as shown in
3. Connect the ammeter A1 (0-5A range) between V
IN
and J1 as shown in
.
4. Connect voltmeter V1 to TP1 and TP2 as shown in
5. Connect LOAD1 to J2 as shown in
. Set LOAD1 to constant current mode to sink 0Adc before
V
IN
is applied.
6. Connect voltmeter, V2 across TP3 and TP4 as shown in
7. Connect LOAD2 to J3 as shown in
. Set LOAD2 to constant current mode to sink 0Adc before
V
IN
is applied.
8. Connect voltmeter, V3 across TP18 and TP19 as shown in
.
9. Place Fan as shown in
and turn on, making sure air is flowing across the EVM.
Using the TPS55386EVM-363 A 12V Input, 5.0V & 3.3V Output, 3A Non-Synchronous Buck Converter
8
SLVU273 – September 2008