Texas Instruments TPS54380EVM-001, User Manual

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Input/Output Connections
2-2
2.1 Input/Output Connections
The TPS54380EVM-001 has the following three input/output connectors: V
I
J1, V
O
I/O J2 and V
O
Core J3. A diagram showing the connection points is
shown in Figure 2–1. A power supply capable of supplying 5 A is connected
to J1 through a pair of 20 AWG wires. The load is connected to J2 through a
pair of 16 AWG wires. The maximum load current capability should be 3 A.
Wire lengths are minimized to reduce losses in the wires. Test point TP6
provides a place to easily connect an oscilloscope voltage probe to monitor the
output voltage. The TPS54380 is intended to be used as a point of load
regulator. In typical applications it is usually located close to the input voltage
source. When using the TPS54380EVM–001 with an external power supply
as the source for V
I
, an additional bulk capacitor may be required, depending
upon the output impedance of the source and length of the hook-up wires. The
test results presented were obtained using a 470
µ
F, 16-V additional input
capacitor. Alternately, C1 may be populated with an input filter capacitor.
Connection is shown for no load on the I/O voltage output. The I/O voltage may
be supply up to 1.5 A into an external load.
Figure 2–1. Connection Diagram
CH1
Oscilloscope
3–6V, 5 A
Voltmeter
– +
–
+
Load
+
–
0 – 3A
Ch2
Voltmeter
Power Supply
Capacitor
Optional Input
S1
ON
OFF
TP1
J1
TP2
GND VIN
3.3 V FIRST 1.8 V FIRST