35-75V

12V

4A

PQ60120EKx04

Product # PQ60120EKx04

Phone 1-888-567-9596

www.synqor.com

Doc.# 005-0005190 Rev. A

07/13/09

Page 8

Input:

Output:

Current:

Part No.:

35-75V

12V

4A

PQ60120EKx04

Technical Specification

0

1

2

3

4

5

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)

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

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

converter from input to output (nominal input voltage).

Figure 8: Thermal plot of converter 4A load current (48 W) with 55°C 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). Load

cap: 15µF tantalum capacitor and 1uF ceramic cap. Input voltage pre-

applied. Ch 1: Vout (5V/div). Ch 2: ON/OFF input (5 V/div).

Figure 10: : Turn-on transient at zero load (10 ms/div). Load cap: 15µF

tantalum capacitor and 1uF ceramic cap. Ch 1: Vout (5V/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 (500mV/div), Ch 2: Iout (2A/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, 30 mΩ ESR

tantalum cap and 1µF ceramic cap. Ch 1: Vout (500mV/div), Ch 2: Iout

(2A/div).

Semiconductor junction temperature is

within 1°C of surface temperature