NCP1219PRINTGEVB
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27
TEST PROCEDURE FOR THE NCP1219PRINTGEVB EVALUATION BOARD
Required Equipment
(*Equivalent test equipment may be submitted.)
•
*Chroma 61604 AC Power Source
•
*Chroma 66202 Digital Power Meter
•
*Agilent 34401A Multimeter
•
*Chroma 6314 Electronic Load with *Chroma 63102
Module
•
*Agilent E3649A DC Power Supply
Test Procedure
1. Set multimeter M1 to measure current.
2. Connect input terminal “I” of multimeter M1 to
pin 3 of connector J5.
3. Connect the input terminal “LO” of multimeter
M1 to the positive terminal of the electronic load.
4. Connect the negative terminal of the electronic
load to pin 2 of connector J5.
5. Set multimeter M2 to measure voltage.
6. Connect the input terminal “HI” of multimeter M2
to pin 3 of connector J5.
7. Connect the input terminal “LO” of multimeter
M2 to pin 2 of connector J5.
8. Connect the positive terminal of the dc power
supply to pin 1 of connector J5.
9. Connect the negative terminal of the dc power
supply to pin 2 of connector J5.
10. Connect the ac power source and power analyzer
to connector J1 as shown in Figure 44.
11. Set the current compliance limit on the ac source
to 4 A.
12. Set the ac source to 115 Vac / 60 Hz.
13. Set the electronic load to the lowest current range
setting.
14. Set the electronic load to 70 mA.
15. Set the dc power supply connected to pin1 of J5 to
0 V.
16.
High voltages are present on the primary side
of the converter during testing. Use Caution.
17. Turn the dc source on.
18. Turn the ac source on.
19. Set the power analyzer to integrate power for 5
minutes and start the integration cycle.
20. Measure V
OUT(standby)
using the corresponding
multimeter. Record the results in Table 5. Verify it
is within the limits of Table 4.
21. Measure and the integrated P
IN(standby)
. For some
power analyzers it may be necessary to convert to
P
IN
from W*h using the equation:
P
IN
+
W
h
5
minutes
60
minutes
1
hour
+
(
W
h
)
12
Record the results in Table 5. Verify it is within the
limits of Table 4.
22. Repeat steps 19 through 21 for a line voltage of
230 Vac / 50 Hz.
23. Set the ac power source to 115 Vac / 60 Hz.
24. Set the electronic load to 1.25 A.
25. Set the dc power supply to 5 V.
26. Perform a 5 minute burn in at the line and load
conditions given in steps 23 and 24.
27. Measure and the output voltage (V
OUT
) using the
corresponding multimeter. Record the results in
Table 6. Verify it is within the limits of Table 4.
28. Measure the output current (I
OUT
) using the
corresponding multimeter. Record the results in
Table 6.
29. Measure the input power (P
IN
) using the power
analyzer. Record the results in Table 6.
30. Calculate the efficiency (
h
) using the equation
h
+
I
OUT
V
OUT
P
IN
100%
Record the results in Table 6.
31. Repeat steps 27 - 30 for all ac source and
electronic load settings (0.01 A, 0.3125 A,
0.625 A, 0.9375 A, 1.25 A, 2.00 A) specified in
Table 3.
32. Calculate the average efficiency (
h
avg
) using the
equation:
h
avg
+
h
25%
)
h
50%
)
h
75%
)
h
100%
4
where
h
25%
,
h
50%
,
h
75%
and
h
100%
are the
efficiencies calculated for the 25%, 50%, 75% and
100% load conditions given in Table 3.
Record the results in Table 6. Verify it is within
the limits of Table 4.
33. Turn off the ac source.
34. Turn off the dc source.
35. Disconnect the ac source.
36. Disconnect the dc source.
37. Disconnect the electronic load.
38. Disconnect both multimeters.
39. End of test.
