35-75V

1.8V

25A

PQ60018EKx25

Product # PQ60018EKx25

Phone 1-888-567-9596

www.synqor.com

Doc.# 005-0005113 Rev. B

06/12/09

Page 8

Input:

Output:

Current:

Part No.:

35-75V

1.8V

25A

PQ60018EKx25

Technical Specification

0

5

10

15

20

25

30

25

40

55

70

85

Ambient Air Temperature (ºC)

400 LFM (2.0 m/s)

300 LFM (1.5 m/s)

200 LFM (1.0 m/s)

100 LFM (0.5 m/s)

PQ60018EKx Figures

Figure 7: Maximum output power derating curves vs. ambient air temperature

for airflow rates of 100LFM through 400LFM with air flowing across the

converter from input to output (nominal input voltage/open frame).

Figure 8: Thermal plot of converter at 22.6A load current (40.68W) with 55°C

air flowing at the rate of 200LFM. Air is flowing across the converter from

input to output (nominal input voltage/open frame).

Figure 9: Turn-on transient at full load (resistive load) (10ms/div). Load

cap: 10uF, 100mΩ ESR tantalum capacitor and 1uF ceramic capacitor. Input

voltage pre-applied. Ch 1: Vout (500mV/div), Ch 2: ON/OFF input (5V/div).

Figure 10: Turn-on transient at zero load (10ms/div). Load cap: 10µF, 100mΩ

ESR tantalum capacitor and 1µF ceramic capacitor. Ch 1: Vout (500mV/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: 15µF tantalum cap and 1µF

ceramic cap. Ch 1: Vout (200mV/div), Ch 2: Iout (10A/div).

Figure 12: Output voltage response to step-change in load current (50%-75%-

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

and 1µF ceramic cap. Ch 1: Vout (200mV/div), Ch 2: Iout (10A/div).