Performance Curves
Non-Isolated
SMT Converter
9.6 - 14.4Vin 16A
16
14
12
I
out
(A)
10
8
6
4
2
0
0
25
40
55
o
Heavy CU board
Typ Install, 6-Layer, 2 oz. (71um) CU board
300 LFM (1.5 m/s) free air
100 LFM (0.5 m/s) free air
70
85
Ambient Air Temperature ( C)
Semiconductor junction temperature is
within 1°C of surface temperature
Figure 7:
Maximum output power derating curves for
1.8Vo, 2.5Vo
units under various thermal conditions and nominal input voltage. See
Thermal Considerations section for more details.
Figure 8:
Thermal plot of
1.8Vo, 2.5Vo
converters at nominal Vin and
16 amp load current mounted on a 70
°
C, 6-Layer, 2 oz. copper board
(typical installation).
16
14
12
I
out
(A)
10
8
6
4
2
0
0
25
40
55
o
Heavy CU board
Typ Install, 6-Layer, 2 oz. (71um) CU board
300 LFM (1.5 m/s) free air
100 LFM (0.5 m/s) free air
70
85
Ambient Air Temperature ( C)
Semiconductor junction temperature is
within 1°C of surface temperature
Figure 9:
Maximum output power derating curves for
3.3Vo, 5.0Vo
units under various thermal conditions and nominal input voltage. See
Thermal Considerations section for more details.
Figure 10:
Thermal plot of
3.3Vo
converter (16 amp load) and
5.0Vo
converter (14.6 amp load). Both at nominal Vin and mounted on a 70
°
C,
6-Layer, 2 oz. copper board (typical installation).
5.0Vout
5.0Vout
3.3Vout
2.5Vout
1.8Vout
1.5Vout
1.2Vout
0.9Vout
3.3Vout
2.5Vout
1.8Vout
1.5Vout
1.2Vout
0.9Vout
Figure 11:
Turn-on transient at full load (resistive load) (400
µ
s/div).
Ch 1: ON/OFF input (5V/div)
Ch 2-8: Vout (1V/div)
Product # NQ12T50SMA16
Phone 1-888-567-9596
Figure 12:
Turn-on transient at zero load (400
µ
s/div).
Ch 1: ON/OFF input (5V/div)
Ch 2-8: Vout (1V/div)
Doc.# 005-2NS12TE Rev. A
5/28/04
Page 7
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