Product # PQ48120HGA12

Phone 1-888-567-9596

Doc.# 005-2HG412C Rev. B

9/8/04

Page 6

Half

Half

Brick

Brick

Performance Curves

48Vin 12Vout 12.5A

0

1

2

3

4

5

6

7

8

9

10

11

12

0

2540

5570

85

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)

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 10 amp load current (120W)

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. Top Trace: Vout (5V/div). Bottom Trace:

ON/OFF input (5V/div)

Figure 10: Turn-on transient at zero load (10 ms/div).

Top Trace: Vout (5V/div)

Bottom Trace: ON/OFF input (5V/div)

of Iout(max); dI/dt = 0.1A/µs). Load cap: 15µF, 450 m

and 1µF ceramic capacitor. Top trace: Vout (500mV/div), Bottom trace: Iout (5A/div).

of Iout(max): dI/dt = 5A/µs). Load cap: 480µF, 15 m

1µF ceramic capacitor. Top trace: Vout (500mV/div), Bottom trace: Iout (5A/div).