Texas Instruments TPS54225, Руководство пользователя

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Table 2-1. Connection and Test Points
Reference Designator Function
J1 V
IN
(see Table 1-1 for V
IN
range)
J2 V
OUT
, 1.05 V at 2 A maximum
JP1 EN control. Connect EN to OFF to disable, connect EN to ON to enable.
TP1 V
IN
test point at V
IN
connector
TP2 GND test point at V
IN
TP3 EN test point
TP4 V
CC
test point
TP5 Analog ground test point
TP6 Switch node test point
TP7 Power good test point
TP8 Output voltage test point
TP9 Ground test point at output connector
2.2 Start-Up Procedure
1. Make sure the jumper at JP1 (Enable control) is set from EN to OFF.
2. Apply appropriate VIN voltage to VIN and PGND terminals at J1.
3. Move the jumper at JP1 (Enable control) to cover EN and ON. The EVM will enable the output voltage.
2.3 Efficiency
Figure 2-1 shows the efficiency for the TPS54225EVM-538 at an ambient temperature of 25°C.
0
10
20
30
40
50
60
70
80
90
100
0.001 0.01 0.1 1 10
5 V
12 V
Efficiency-%
V = 1.05 V
O
I - Output Current - A
O
Figure 2-1. TPS54225EVM-538 Efficiency
Test Setup and Results www.ti.com
4 TPS54225 Step-Down Converter Evaluation Module User's Guide SLVU337A – NOVEMBER 2009 – REVISED OCTOBER 2021
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