Overview
The Q48T30025 is a through-hole mounted, ultra-high efficiency DC-DC converter in a quarter brick format designed by Power-One. It boasts significant advancements in circuit design and packaging, leading to an industry-leading thermal performance and a low profile structure, primarily catering to telecommunications applications. RoHS compliant, it operates without the need for a heat sink, minimizing airflow impact and thereby enhancing cooling for downstream devices.
Features
Notable features of the Q48T30025 converter include its capacity to deliver up to 30A output current with an efficiency of up to 87.5% at 15A. It is operational without a minimum load and is designed to start up into a pre-biased output. Furthermore, the unit retains a high reliability with a calculated MTBF of 2.6 million hours. Its small size, low weight, and compatibility with industry-standard footprints and pinouts make it a versatile choice for various applications.
Protection and Compliance
Fully protected, the converter features remote output sense, output voltage trim ranging from +10% to -20%, and is designed to meet the basic insulation requirements of EN60950. It withstands input transients up to 100V for 100 ms, and is recognized by safety standards including UL 60950 in the U.S. and Canada. Moreover, it meets FCC Class B and EN55022 Class B emissions requirements with an additional external filter.
Applications
Its primary applications include telecommunications, data communications, wireless infrastructure, and servers. The chart on the first page illustrates the relation between available current versus ambient air temperature and airflow, providing a guideline for performance expectations in different thermal conditions.
Electrical Specifications
Operating within an input voltage range of 36-75VDC, the converter is designed for a typical 48VDC input. It exhibits robustness with absolute maximum ratings stretching up to 80VDC for input voltage and operating temperatures ranging from -55 to 125 degrees Celsius. The detailed specifications table lists parameters such as input characteristics, output current range, isolation features, and feature characteristics including switching frequency, output voltage trim range, over-temperature shutdown, and ON/OFF control logic.
Additional Notes
The product documentation details that the output voltage can be adjusted up to 10% via either sense leads or trim function. Nonetheless, total output voltage adjustment should not exceed 10% of Vout(NOM) to ensure the proper functioning of the over-voltage protection circuitry.
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