Technical Specification
Quarter
Brick
48Vin 2.5Vout 40A
40 Amp, No Heatsink, Isolated DC/DC Converter
The PQ60025QTA40 PowerQor™ Tera 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.
The Tera series offers the maximum useable output cur-
rent for any standard “quarter-brick” module.
PQ60025QTA40 Module
Operational Features
• Ultra-high efficiency, 91% at 20 amp load, 88% at
40 amp load current
• Delivers up to 40 amps of output current with mini-
mal derating - no heatsink required
• Wide input voltage range: 35V – 75V, with 100V
100ms input voltage transient withstand
• Fixed frequency switching provides predictable EMI
performance
• No minimum load requirement means no preload
resistors required
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
Mechanical Features
• Industry standard quarter-brick pin-out configuration
• Industry standard size: 1.45” x 2.3”
• Total height less than 0.43”, permits better airflow
and smaller card pitch
• Total weight: 42 grams (1.5 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/cUL 60950 recognized (US & Canada), basic
insulation rating
• TUV certified to EN60950
• Meets 72/23/EEC and 93/68/EEC directives
which facilitates CE Marking in user’s end product
• Board and plastic components meet UL94V-0 flam-
mability requirements
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 permits custom voltages and
voltage margining
Product # PQ60025QTA40
Phone 1-888-567-9596
Doc.# 005-2QT625C Rev. B
3/6/03
Page 1
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