Texas Instruments TPS51125AEVM, Руководство пользователя

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4 Test Setup and Results
4.1 Test Setup
Connect the test equipment and TPS51125AEVM board as shown in Figure 4-1 .
Electronic
Load1
Electronic
Load2
DMM1
DMM2
12V/10A
Power Supply
DMM3
+
_
+
_
+
_
DMM4
Oscilloscope
CH1
CH2
Oscilloscope
+
_
VO2_GND
VO2
CN2
VO1
VO1_GND
VBAT_GND
VBAT
TP1
CN1
HPA557
TPS51125AEVM
+
_
+
_
_
+
1M W
Electronic
Load1
Electronic
Load2
DMM1
DMM2
12V/10A
Power Supply
DMM3
+
_
+
_
+
_
DMM4
Oscilloscope
CH1
CH2
Oscilloscope
+
_
VO2_GND
VO2
CN2
VO1
VO1_GND
VBAT_GND
VBAT
TP1
CN1
HPA557
TPS51125AEVM
VO2_GND
VO2
CN2
VO1
VO1_GND
VBAT_GND
VBAT
TP1
CN1
HPA557
TPS51125AEVM
+
_
+
_
_
+
1M W
Figure 4-1. Equipment Setup for TPS51125AEVM Board
4.2 Test Procedure
1. Ensure the switches SW1 (ENTRIP1), SW2 (ENTRIP2), and SW3 (EN0) are in the “OFF” position.
2. Ensure the shunt jumper for JP1 is set to 5-pin to 6-pin (Med1), and the shunt jumper for JP2 is set 3-pin to
4-pin (Auto-skip).
3. Apply appropriate VBAT voltage to VBAT and VBAT_GND terminals.
4. Turn on SW3 (EN0), and both VREG5 (5V-LDO) and VREG3 (3.3V-LDO) start up.
5. When SW3 stays on, VREF (2V-REF) is enabled.
6. When SW3 stays on and turn on SW1 (ENTRIP1), CH1-output starts up.
7. When SW3 stays on and turn on SW2 (ENTRIP2), CH2-output starts up.
4.3 Start-Up Performance
Figure 4-2. 5-V Start-Up Waveforms
Figure 4-3. 3.3-V Start-Up Waveforms
Test Setup and Results www.ti.com
4 TPS51125A Buck Controller Evaluation Module User's Guide SLUU408A – FEBRUARY 2010 – REVISED JANUARY 2022
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