Product # PQ60025QTA40

Phone 1-888-567-9596

Doc.# 005-2QT625C Rev. B

3/6/03

Page 6

Performance Curves

48Vin 2.5Vout 40A

Quarter

Quarter

Brick

Brick

0

5

10

15

20

25

30

35

40

0

25

4055

7085

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

lengthwise from output to input (nominal input voltage).

air flowing at the rate of 200 LFM. Air is flowing lengthwise from out-

put to input (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)

50% of Iout(max); dI/dt = 0.1A/µs). Load cap: 10µF, 100 m

itor and 1µF ceramic capacitor. Ch 1: Vout (100mV/div), Ch 2: Iout (10A/div).

50% of Iout(max): dI/dt = 1A/µs). Load cap: 470µF, 30 m

capacitor and 1µF ceramic cap. Ch 1: Vout (100mV/div), Ch 2: Iout (10A/div).

Semiconductor junction temperature is

within 1

°C of surface temperature