PQ60480QTA03 Datasheet, PDF (6/13 Pages) SynQor Worldwide Headquarters – Quarter-brick DC/DC Converter

Technical Specification
Input: 35-75 V
Output: 48 V
Current: 3 A (144W)
Package: Quarter-brick
3.5
3.0
2.5
2.0
1.5
1.0
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
0.5
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
0.0
25
40
55
70
85
Ambient Air Temperature (°C)
Figure 7: Maximum output power derating curves vs. ambient air tem-
perature for airflow rates of 100 LFM through 400 LFM with air flow-
ing from pin 1 to pin 3 (nominal input voltage).
Semiconductor junction temperature is
within 1°C of surface temperature
Figure 8: Thermal plot of converter at 3 amp load current (144W) with
55°C air flowing at the rate of 200 LFM. Air is flowing from pin 3 to
pin 1 (nominal input voltage).
Figure 9: Turn-on transient at full rated load (resistive load) (20
ms/div) Input voltage pre-applied. Ch 1: Vout (20V/div). Ch 2:
ON/OFF input (5V/div)
Figure 10: Turn-on transient at zero load current (5 ms/div).
Ch 1: Vout (20V/div)
Ch 2: ON/OFF input (5V/div)
12
10
8
6
Figure 11: Output voltage response to step-change in load current (50%-75%-
50% of Iout(max); dI/dt = 0.1A/µ s). Load cap: 10µ F, 100 mW ESR tantalum
capacitor and 1µ F ceramic capacitor. Ch 1: Vout (2V/div), Ch 2: Iout (2A/div).
4
100% Load
2
50% Load
0% Load
0
40.0 39.5 39.0 38.5 38.0 37.5 37.0 36.6 36.0 35.5 35.0
Input Voltage (V)
Figure 12: Percentage of output voltage trim-up that can be achieved at
various input voltages from Vin 35V-40V and output loads of 0%, 50%
and full load.
Product # PQ60480QTA03
Phone [phone]
www.synqor.com
Doc.# 005-2QT648C Rev. A 9/4/07
Page 6