Performance Curves
Brick
60
50
40
Iout (A)
30
20
10
0
0
25
40
55
o
Half
48Vin 2.5Vout 60A
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
0 LFM (0 m/s)
70
85
Ambient Air Temperature ( C)
Figure 7:
Maximum output power derating curves vs. ambient air tem-
perature for airflow rates of 0 LFM through 400 LFM with air flowing
from input to output (nominal input voltage).
Figure 8:
Thermal plot of converter at 48 amp load current with 55
°
C
air flowing at the rate of 200 LFM. Air is flowing across the converter
from input to output (nominal input voltage).
Figure 9:
Turn-on transient at full load (resistive load) (10 ms/div).
Top Trace: Vout (1V/div)
Bottom Trace: ON/OFF input (5V/div)
Figure 10:
Turn-on transient at zero load (10 ms/div).
Top Trace: Vout (1V/div)
Bottom Trace: ON/OFF input (5V/div)
Figure 11
:
Output voltage response to step-change in load current (50%-75%-50%
of Iout(max); dI/dt = 0.1A/µs). Load cap: 15µF, 450 m
Ω
ESR tantalum capacitor and
1µF ceramic capacitor. Top trace: Vout (100mV/div), Bottom trace: Iout (20A/div).
Product # PQ48025HTA60
Phone 1-888-567-9596
Figure 12
:
Output voltage response to step-change in load current (50%-75%-50%
of Iout(max): dI/dt = 5A/µs). Load cap: 480µF, 15 m
Ω
ESR tantalum capacitor and
1µF ceramic capacitor. Top trace: Vout (200mV/div), Bottom trace: Iout (20A/div).
Doc.# 005-2HT425F Rev. Q
11/19/02
Page 6
Semiconductor junction temperature is
within 1°C of surface temperature
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