Technical
S pecification
PQ60018QTA40
48V in
Input
1.8Vout
Output
40Amp
Current
2000Vdc
Isolation
Quar ter-brick
DC/DC Conver ter
The PQ60018QTA40 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 applica -
tion effort. All of the power and control components are mount -
ed to the multi-layer PCB substrate with high-yield surface mount
technology. Since the PowerQor converter has no explicit ther -
mal interfaces, it is extremely reliable. The Tera series offers the
maximum useable output current for any standard “quarter-
brick” module. RoHS 5/6 compliant (see page 12 ).
Operational Features
• Ultra-high efficiency, 90% at half load, >86% full load
• Delivers up to 40 amps of output current with minimal
derating - no heatsink required
• Wide input voltage range: 35V – 75V, with 100V
100ms input voltage transient capability
• Fixed frequency switching provides predictable EMI per-
formance
• No minimum load requirement means no preload resis-
tors required
PQ60018QTA40 Module
Pr otection Features
• Input under-voltage lockout disables converter at low
input voltage conditions
• Output current limit and short circuit protection protects
converter and load from permanent damage and conse-
quent hazardous conditions
• Active back bias limit prevents damage to converter
from external load induced pre-bias
• Output over-voltage protection protects load from dam-
aging voltages
• Thermal shutdown protects converter from abnormal
environmental conditions
Mechanical Features
• Industry standard quarter-brick pin-out configuration
• Industry standard size: 1.45” x 2.3” (36.8x58.4mm)
• Total height less than 0.43” (10.9mm), permits better
airflow and smaller card pitch
• Total weight: 1.5 oz. (42 grams)
• Flanged pins designed to permit surface mount solder-
ing (avoid wave solder) using FPiP technique
Safety Features
• 2000V, 30 MΩ input-to-output isolation provides
input/output ground separation
• UL/cUL 60950 recognized (US & Canada), basic insu-
lation 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 flammabil-
ity requirements
Contr ol 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 # PQ60018QTA40
Phone 1-888-567-9596
Doc.# 005-2QT618C Rev. C
09/08/05
Page 1
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