Texas Instruments TPS54110EVM-044, Руководство пользователя, Страница: 13 / 28

Input/Output Connections
2-2
2.1 Input/Output Connections
The TPS54110EVM−44 has the following two input/output connectors: V
I
(J1),
and V
O
(J2). A diagram showing the connection points is shown in Figure 2−1.
A power supply capable of supplying 3 A should be connected to J1 through
a pair of 20 awg wires. The load should be connected to J2 through a pair of
20 awg wires. The maximum load current capability should be 1.5 A. Wire
lengths should be minimized to reduce losses in the wires. Test point TP5
provides a place to easily connect an oscilloscope voltage probe to monitor the
output voltage. The TPS54110 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 TPS54110EVM−044 with an external power supply
as the source for V
I
, an additional bulk capacitor may be required, depending
on the output impedance of the source and length of the hook-up wires. The
test results presented are obtained using a 470-
µ
F, 16-V additional input
capacitor. Alternately, C1 can be populated with an input filter capacitor.
Figure 2−1. Connection Diagram
CH1
Oscilloscope
3−6 V, 3 A
− +
Optional Input
Capacitor
−
+
Load
+
−
0 − 1.5A
Ch2
Voltmeter
Voltmeter