Performance Curves
Brick
Quarter
24V 15V
6.7A
out
in
7
6
5
4
3
2
1
0
Semiconductor junction temperature is
within 1 C of surface temperature
°
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)
0
25
40
55
70
85
Vin = 24V
Ambient Air Temperature (oC)
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 pin 1 to pin 3 (nominal input voltage).
Figure 8: Thermal plot of converter at 4.4 amp load current with 55°C
air flowing at the rate of 200 LFM. Air is flowing across the converter
from pin 1 to pin 3 (nominal input voltage).
Figure 9: Turn-on transient at full load (resistive load) (2 ms/div).
Ch1: Vout (5V/div)
Figure 10: Turn-on transient at zero load (2 ms/div).
Ch1: Vout (5V/div)
Ch2: ON/OFF input (5V/div)
Ch2: ON/OFF input (5V/div)
Figure 11: Output voltage response to step-change in load current (50%-75%-50%
Figure 12: Output voltage response to step-change in load current (50%-75%-
of Iout(max); dI/dt = 0.1A/
µ
s). Load cap: 10
µ
F, 100 m
Ω
ESR tantalum capacitor
50% of Iout(max): dI/dt = 5A/µs). Load cap: 470µF, 30 mΩ ESR tantalum capaci-
and 1µF ceramic capacitor. Ch1: Vout (500mV/div), Ch2: Iout (5A/div).
tor and 1
µ
F ceramic capacitor. Ch1: Vout (500mV/div), Ch2: Iout (5A/div).
Product # PQ24150QGA07
Phone 1-888-567-9596
Doc.# 005-2QG215D_A
3/1/02
Page 5
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