Product # PQ48060QGA17

Phone 1-888-567-9596

Doc.# 005-2QG460D Rev. E

8/16/02

Page 6

Performance Curves

48Vin 6.0Vout 17A

0

2

4

6

8

10

12

14

16

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)

Quarter

Quarter

Brick

Brick

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).

Figure 8: Thermal plot of converter at 13 amp load current (79W) with

verter from input to output (nominal input voltage).

Figure 9: Turn-on transient at full load (resistive load) (2 ms/div).

Ch 1: Vout (2V/div)

Ch 2: ON/OFF input (5V/div)

Figure 10: Turn-on transient at zero load (2 ms/div).

Ch 1: Vout (2V/div)

Ch 2: ON/OFF input (5V/div)

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

and 1µF ceramic capacitor. Ch 1: Vout (200mV/div), Ch 2: Iout (5A/div).

50% of Iout(max): dI/dt = 5A/µs). Load cap: 470µF, 30 m

capacitor and 1µF ceramic cap. Ch 1: Vout (200mV/div), Ch 2: Iout (5A/div).

Semiconductor junction temperature is

within 1

°C of surface temperature