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Q24T25033 DC-DC Converter Data Sheet
18-36 VDC Input; 3.3 VDC @ 25A Output
Description
The Q24T25033 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.
In telecommunications applications the Q ?? Family 25 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-
Features
Q24T25033 Converter
tremely high quality and reliability.
30
25
20
15
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
10 300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
5 30 LFM (0.15 m/s)
0
20 30 40 50 60 70 80 90
Ambient Temperature [°C]
Fig. 1: Available load current vs. ambient air tem-
perature and airflow rates for Q24T25033 conver-
ter mounted vertically with air flowing from pin 3 to
pin 1, MOSFET temperature ? 120 ? C, Vin = 27 V.
Applications
? Telecommunications
? Data communications
? Wireless
? Servers
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RoHS lead-free solder and lead-solder-exempted
products are available
Delivers up to 25 A
Higher current capability at 70 oC than existing
quarter-brick and half-brick converters
High efficiency: 88.5% @ 25 A, 88.5% @ 12.5 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
On-board LC input filter
Fixed-frequency operation
Fully protected
Remote output sense
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
Meets conducted emissions requirements of FCC
Class B and EN55022 Class B with external filter
All materials meet UL94, V-0 flammability rating
MCD10223 Rev. 1.0, 02-Sep-10
Page 1 of 14
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