PQ48015QNA25 Datasheet, PDF (1/13 Pages) SynQor Worldwide Headquarters – High Efficiency, No Heatsink, Isolated DC/DC Converter

Technical Specification
Quarter
Brick
48Vin 1.5Vout 25A
High Efficiency, No Heatsink, Isolated DC/DC Converter
The PQ48015QNA25 PowerQor™ quarter-brick
converter is a next-generation, board-mountable,
isolated, fixed switching frequency dc/dc
converter that uses synchronous rectification to
achieve extremely high conversion efficiency. The
power dissipated by the converter is so low that a
heatsink is not required, which saves cost, weight,
height, and application effort. All of the power and
control components are mounted to the multi-layer PCB
substrate with high-yield surface mount technology.
Since the PowerQor converter has no explicit
thermal connections, it is extremely reliable.
Operational Features
• Ultra-high efficiency, 81% at full rated load current
• Delivers up to 25 amps of output current with mini-
mal derating - no heatsink required
• Wide input voltage range: 35V – 75V meets or
exceeds all 48V bus standards
• Fixed frequency switching provides predictable EMI
performance
• No minimum load requirement means no preload
resistors required
Mechanical Features
• Industry standard pin-out configuration (pin for pin
compatible with Lucent QHW series)
• Industry standard size: 1.45” x 2.3”
• Total height less than 0.40”, permits better airflow
and smaller card pitch
• Total weight: 34 grams (1.2 oz.), lower mass great-
ly reduces vibration and shock problems
Safety Features
• 2000V, 10 MΩ input-to-output isolation provides
input/output ground separation
• UL 1950 recognized (US & Canada), basic insula-
tion rating
• TUV certified to EN60950
Product # PQ48015QNA25
Phone [phone]
PQ48015QNA25 Module
Protection Features
• Input under-voltage lockout disables converter at
low input voltage conditions
• Output current limit and short circuit protection
protects converter from excessive load current or
short circuits
• Output over-voltage protection protects load from
damaging voltages
• Thermal shutdown protects converter from abnor-
mal environmental conditions
Control Features
• On/Off control referenced to input side (positive
and negative logic options are available)
• Remote sense for the output voltage compensates
for output distribution drops
• Output voltage trim: +10%/-20%, permits custom
voltages and voltage margining
Safety Features (cont.)
• Meets 72/23/EEC and 93/68/EEC directives
which facilitates CE Marking in user’s end product
• Board and plastic components meet 94V-0 flamma-
bility requirements
Doc.# 005-2QN451D_C
9/4/01
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