Product # PQ48025HGA40

Phone 1-888-567-9596

Doc.# 005-2HG425C Rev. C

12/03/02

Page 6

Half

Half

Brick

Brick

Performance Curves

48Vin 2.5Vout 40A

0

5

10

15

20

25

30

35

40

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).

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)

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

1µF ceramic capacitor. Top trace: Vout (100mV/div), Bottom trace: Iout (10A/div).

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

1µF ceramic capacitor. Top trace: Vout (200mV/div), Bottom trace: Iout (10A/div).