Q48T30018 DC-DC Converter Data Sheet
36-75 VDC Input; 1.8 VDC @ 30A Output
The Q48T30018 through-hole mounted DC-DC converter
offers unprecedented performance in the industry-standard
quarter brick format. This is accomplished through the use of
patent pending circuit and packaging techniques to achieve
ultra-high efficiency, excellent thermal performance and a
very low body profile.
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In telecommunications applications theQFamily 30 A con-
verters provide thermal performance that far exceeds all
quarter bricks and is comparable even to existing half-bricks.
Low body profile and the preclusion of heat sinks minimize
airflow shadowing, thus enhancing cooling for downstream
devices. The use of 100% surface-mount technologies for
assembly, coupled with Power-One’s advanced electric and
thermal circuitry and packaging, results in a product with ex-
tremely high quality and reliability.
Q48T30018 Converter
Features
35
30
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RoHS lead-free solder and lead-solder-exempted
products are available
Delivers up to 30 A
Higher current capability at 70ºC than existing quarter
brick and 30 A half brick converters
High efficiency: 84% @ 30 A, 85.5% @ 15 A
Start-up into pre-biased output
No minimum load required
No heat sink required
Low profile: 0.28” [7.2 mm]
Low weight: 1 oz [28 g] typical
Industry-standard footprint: 1.45” x 2.30”
Industry-standard pinout
Meets Basic Insulation Requirements of EN60950
Withstands 100 V input transient for 100 ms
On-board LC input filter
Fixed-frequency operation
Fully protected
Remote output sense
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500 LFM (2.5 m/s)
15
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
10
100 LFM (0.5 m/s)
30 LFM (0.15 m/s)
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90
Ambient Temperature [°C]
Fig. 1: Available load current vs. ambient air temperature and air-
flow rates for Q48T30018 converter mounted vertically with air flow-
ing from pin 3 to pin 1, MOSFET temperature ≤ 120°C, Vin = 54 V.
Output voltage trim range: +10%/-20%
Trim resistor via industry-standard equations
High reliability: MTBF 2.6 million hours, calculated per
Telcordia TR-332, Method I Case 1
Positive or negative logic ON/OFF option
UL 60950 recognized in U.S. & Canada, and DEMKO
certified per IEC/EN 60950
Applications
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Telecommunications
Data communications
Wireless
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Servers
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Meets conducted emissions requirements of FCC
Class B and EN55022 Class B with external filter
All materials meet UL94, V-0 flammability rating
JUN 02, 2003 revised to NOV 20, 2006
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