PQ60033EGX20 Datasheet, PDF (6/13 Pages) SynQor Worldwide Headquarters – Fixed frequency switching provides predictable EMI performance

Technical Specification
20
18
16
14
12
10
8
400 LFM (2.0 m/s)
6
300 LFM (1.5 m/s)
4
200 LFM (1.0 m/s)
2
100 LFM (0.5 m/s)
50 LFM (0.25 m/s)
0
0
25
40
55
70
85
Ambient Air Temperature (^oC)
Figure 7: Maximum output power-derating curves vs. ambient air temperature
for airflow rates of 50 LFM through 400 LFM with air flowing from input to
output (nominal input voltage).
Input: 35-75 V
Output: 3.3 V
Current: 20 A
Package: Eighth-brick
Semiconductor junction temperature is
within 1°C of surface temperature
Figure 8: Thermal plot of converter at 17 amp load current (57W) 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). Input
voltage pre-applied. Ch 1: Vout (1V/div). Ch 2: ON/OFF input (5V/div)
Figure 10: Turn-on transient at zero load (10 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 cap
and 1µF ceramic cap. Ch 1: Vout (100mV/div), Ch 2: Iout (5A/div).
Figure 12: Output voltage response to step-change in load current (50%-75%-
50% of Iout(max): dI/dt = 5A/µs). Load cap: 470µF, 30 mΩ ESR tantalum cap
and 1µF ceramic cap. Ch 1: Vout (100mV/div), Ch 2: Iout (5A/div).
Product # PQ60033EGx20
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www.synqor.com
Doc.# 005-0005349 Rev. A
09/23/09
Page 6