Datasheet
Network
Analyzer
Isolation
Transformer
LOAD1
5.0V@
2A
FAN
V2
See TipandBarrel
Measurementfor
Voutripple
V1
A1
VIN
Oscilloscope
1M
20mV/
div
20MHz
Ω, AC
LOAD2
3.3V@
2A
V3
_
+
_
+
_
+
_
+
+
_
+
+
_
4.3 Start Up / Shut Down Procedure
4.4 Output Ripple Voltage Measurement Procedure
Test Set UP
www.ti.com
Figure 4. Control Loop Measurement Setup
1. Increase V
IN
from 0V to 12Vdc
2. Vary LOAD1 from 0 – 3Adc
3. Vary LOAD2 from 0 – 3Adc
4. Vary V
IN
from 9.6Vdc to 13.2Vdc
5. Decrease V
IN
to 0Vdc
6. Decrease LOAD1 to 0A
7. Decrease LOAD2 to 0A
See Section 5.4 for more information on measuring output ripple.
1. Increase V
IN
from 0V to 12Vdc
2. Adjust LOAD1 to desired load between 0Adc and 3Adc
3. Adjust LOAD2 to desired load between 0Adc and 3Adc
4. Adjust V
IN
to desired load between 9.6Vdc and 13.2Vdc
10 Using the TPS55386EVM-363 A 12V Input, 5.0V & 3.3V Output, 3A Non-Synchronous Buck Converter SLVU273 – September 2008
Submit Documentation Feedback