Datasheet

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Network
Analyzer
Isolation
Transformer
LOAD1
1.8V @
10A
-
+
FAN
TP17
TEXAS INSTRUMENTS
TPS40193EVM-001
12V to 1.8V @ 10A
HPA238
J2
V2
-
+
TP16
TP15
Pre-Bias
See Tip and Barrel
Measurement for
Vout ripple
+
-
-
+
V1
+
-
A1
-
+
V
VIN
TP7 TP9 TP10 TP8
TP12 TP11 TP13 TP14
GND LDRVSW HDRV
CH1 GND CH2 GND
TP2
TP1
Oscilloscope
1MW, AC
20mV / div
20MHz
J1
Dis
TP6
COMP
TP5
TP4
TP3
External Source
GND
PGOOD
En
JP 1
5.3 Start-up/Shutdown Procedure
5.4 Output Ripple Voltage Measurement Procedure
Test Setup
Figure 4. TPS40193EVM-001 Control Loop Measurement Setup
Follow these steps to start up and shut down the TPS40193EVM-001.
Step 1. Increase V
IN
from 0V to 12V
DC
.
Step 2. Vary LOAD1 from 0A
DC
to 10A
DC
.
Step 3. Vary V
IN
from 8.0V
DC
to 14V
DC
.
Step 4. Decrease V
IN
to 0V
DC
.
Step 5. Decrease LOAD1 to 0A.
Follow these steps to measure the output ripple voltage on the TPS40193EVM-001.
Step 1. Increase V
IN
from 0V to 12V
DC
.
Step 2. Adjust LOAD1 to desired load between 0A
DC
and 10A
DC
.
Step 3. Adjust V
IN
to desired load between 8.0V
DC
and 14V
DC
.
Step 4. Connect oscilloscope probe to TP15 and TP16 as shown in Figure 3 .
Step 5. Measure output ripple.
Step 6. Decrease V
IN
to 0V
DC
.
Step 7. Decrease LOAD1 to 0A.
Using the TPS40193EVM-001 10 SLUU274 – May 2007
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