Test Procedure for the
NTMFS4854NSGEVB Evaluation Board
Equipment List:
•
VIN DC Power Supply with Voltage Sense Lines – Capable of supplying 2 V / 12 A
•
VDD DC Power Supply – Capable of supplying 5 V / 2 A
•
Constant Current Electronic Load – Capable of supplying 10 A continuous current
•
Digital Voltage Meters – Capable of measuring 0 – 2 V DC
•
Digital Current Meter – Capable of measuring 0 – 10 A DC
•
VMEAS Precision Digital Voltage Meter – Capable of measuring down to 0.1 mV
IMPORTANT! REMOVE THE JUMPER CONNECTION BETWEEN EN AND GND PRIOR TO TESTING.
01/29/2012
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Evaluation Board Test Procedure
1.0 Basic Function Test (No Load Applied)
1.
Make sure all power is off.
2.
Connect the evaluation board as shown in Figure 1 below.
3.
Apply 5.0 V to VDD. Measure the VDD voltage using a digital voltage meter, connected at the evaluation
board terminals. Adjust the VDD power supply as needed to obtain 5.0 V ± 1% at the evaluation board
terminals.
4.
Apply 1.5 V to VIN. Measure the VIN voltage using a digital voltage meter, connected at the evaluation
board terminals. Adjust the VIN power supply as needed to obtain 1.5 V ± 1% at the evaluation board
terminals.
5.
Measure VOUT using a digital voltage meter, connected at the evaluation board terminals. Verify that
VOUT is 1.5 V ± 1%.
6.
Turn off the VIN power supply, followed by the VDD power supply.
Digital
Meter
VIN Power Supply
1.500 V
-Vs
-
0.00 A
+
+Vs
Digital
Meter
V
-
+
V
Evaluation Board
VIN
Digital
Meter
VDD Power
Supply
+
+
-
GND
-
GND
EN
GND VDD
V
5.000 V
+
VOUT
GND
GND
VMEAS
-
Figure 1. Evaluation Board Setup for Basic Function Test
01/29/2012
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2.0 ENABLE Function Test (No Load Applied)
1.
Make sure all power is off.
2.
Connect the evaluation board as shown in Figure 2 below (except for the jumper in blue).
3.
Apply 5.0 V to VDD. Measure the VDD voltage using a digital voltage meter, connected at the evaluation
board terminals. Adjust the VDD power supply as needed to obtain 5.0 V ± 1% at the evaluation board
terminals.
4.
Apply 1.5 V to VIN. Measure the VIN voltage using a digital voltage meter, connected at the evaluation
board terminals. Adjust the VIN power supply as needed to obtain 1.5 V ± 1% at the evaluation board
terminals.
5.
Measure VOUT using a digital voltage meter, connected at the evaluation board terminals. Verify that
VOUT is 1.5 V ± 1%.
6.
Attach the jumper connecting EN and GND, as shown in blue in Figure 2.
7.
Measure VOUT using a digital voltage meter, connected at the evaluation board terminals. Verify that
VOUT drops to 0 V ± 1%.
8.
Remove the jumper between EN and GND.
9.
Measure VOUT using a digital voltage meter, connected at the evaluation board terminals. Verify that
VOUT returns to 1.5 V ± 1%.
10. Turn off the VIN power supply, followed by the VDD power supply.
Figure 2. Evaluation Board Setup for ENABLE Function Test
01/29/2012
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3.0 Board Function Test with a 5 Amp Load Applied
1.
Make sure all power is off.
2.
Connect the evaluation board as shown in Figure 3 below.
3.
Apply 5.0 V to VDD. Measure the VDD voltage using a digital voltage meter, connected at the evaluation
board terminals. Adjust the VDD power supply as needed to obtain 5.0 V ± 1% at the evaluation board
terminals.
4.
Apply 1.5 V to VIN. Measure the VIN voltage using a digital voltage meter, connected at the evaluation
board terminals. Adjust the VIN power supply as needed to obtain 1.5 V ± 1% at the evaluation board
terminals.
5.
Apply a constant current electronic load of 5 A to VOUT. Adjust the electronic load as needed to obtain
5.0 A ± 1% on the digital current meter.
6.
Measure VMEAS using the precision digital voltage meter, connected at the evaluation board terminals.
7.
Verify that VMEAS is 376 mV ± 8%.
8.
Turn off the electronic load.
9.
Turn off the VIN power supply, followed by the VDD power supply.
Figure 3. Evaluation Board Setup for 5 A Load Function Test
01/29/2012
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