PQ60033QTA35 Datasheet, PDF (6/13 Pages) SynQor Worldwide Headquarters – 35 Amp, No Heatsink, Isolated DC/DC Converter

35
30
25
20
15
400 LFM (2.0 m/s)
10
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
5
100 LFM (0.5 m/s)
0 LFM (0 m/s)
0
0
25
40
55
70
85
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
lengthwise from input to output (nominal input voltage).
Performance Curves
Quarter
Brick
48Vin 3.3Vout 35A
Semiconductor junction temperature is
within 1°C of surface temperature
Figure 8: Thermal plot of converter at 32 amp load current with 55°C
air flowing at the rate of 200 LFM. Air is flowing lengthwise from
input to output (nominal input voltage).
Figure 9: Turn-on transient at full rated load (resistive load) (2 ms/div)
Ch 1: Vout (1V/div)
Ch 2: ON/OFF input (5V/div)
Figure 10: Turn-on transient at zero load current (2 ms/div).
Ch 1: Vout (1V/div)
Ch 2: 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: 10µF, 100 mΩ ESR tantalum capac-
itor and 1µF ceramic capacitor. Ch 1: Vout (100mV/div), Ch 2: Iout (10A/div).
Product # PQ60033QTA35
Phone [phone]
Figure 12: Output voltage response to step-change in load current (50%-75%-
50% of Iout(max): dI/dt = 1A/µs). Load cap: 470µF, 30 mΩ ESR tantalum
capacitor and 1µF ceramic cap. Ch 1: Vout (100mV/div), Ch 2: Iout (10A/div).
Doc.# 005-2QT633C Rev. C
3/6/03
Page 6