The Q48T25020 DC-DC Converter is a high-performance, through-hole mounted converter with a 36-75 VDC input and offers a 2.0 VDC, 25A output. It is notable for its efficiency, thermal performance, and reduced body profile. Utilizing patented circuit and packaging techniques, it delivers efficiency and robust thermal performance, comparable to half-brick converters, mainly designed for telecommunications applications. The converter’s low profile aids in enhanced cooling for adjacent components by minimizing airflow shadowing.
Features
The Q48T25020 Converter is RoHS compliant, reflecting the use of lead-free solder and exemption for lead use in certain products. It supports a high output of up to 25A and maintains higher current capability, even at 70°C, without the requirement of heat sinks. Efficiency is high at 85.5% across both 25A and 12.5A loads. Notably, the converter is operable without a minimum load and can start up with a pre-biased output.
Physical characteristics include a low profile at just 0.28 inches (7.2 mm), and a light weight of approximately 1 oz (28 g). It adheres to an industry-standard footprint of 1.45″ x 2.30″ and pinout. The product meets the Basic Insulation Requirements of EN60950 and can withstand a 100 V input transient for 100 ms. The build consists entirely of surface-mount components, bolstering reliability and quality.
Regarding its operational features, the Q48T25020 offers fixed-frequency operation and is fully protected with onboard LC input filters. It provides remote output sense and an adjustable output voltage trim range of +10%/−20%. Another key benefit is the high reliability, with a Mean Time Between Failures (MTBF) of 2.6 million hours, as calculated according to Telcordia TR-332.
Certifications and Compliance
Its certifications include UL 60950 recognition in the United States and Canada, and DEMKO certification according to IEC/EN 60950. The converter also complies with the conducted emissions requirements of FCC Class B and EN55022 Class B, provided an external filter is used. All materials utilized in the converter are flame retardant with an UL94, V-0 rating.
Applications
The Q48T25020 Converter is suited for several critical technological applications, including telecommunications, data communications, wireless infrastructure, and servers, making it a versatile component in various industrial settings.
Performance Graph
A performance graph is provided (Fig: 1) illustrating the load current capabilities relative to ambient air temperature and airflow rates when the converter is mounted vertically. This visual indicates the MOSFET temperature must remain below 120°C, with an input voltage of 54 V.
The data sheet was last revised on November 20, 2006, indicating the most current information available for the Q48T25020 Converter as of that date.
Manual:
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