Single Output UCQ Models
Low-Profile, Quarter Brick, 8.3-40 Amp
Isolated DC/DC Converters
Typical units
FEATURES
PRODUCT OVERVIEW
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For applications requiring improved electrical and
thermal performance at reduced cost, consider
DATEL’s new UCQ series “quarter brick” DC/DC
power converters. These compact units measure
just 1.45" x 2.3" x 0.4" (36.8 x 60.9 x 10.2 mm)
and fit the industry-standard footprint.
The UCQ’s feature full isolation to 2250Vdc
meeting BASIC insulation requirements of
Standard quarter-brick package/pinout
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Low cost; Low profile, 0.4" (10.2mm)
UL/EN/IEC 60950-1. Input filters reduce propa-
gated switching noise back to input sources. Also
included is a remote On/Off switch control (with
positive or negative polarity), output trim adjustable
over nominal and output sense functions to reduce
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24V or 48V nominal input
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Outputs: 1.2V to 12V
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Interleaved synchronous-rectifier topology
• Ultra high efficiency
• No output reverse conduction
Available outputs range between 1.2V @ 30 Amps
to 12V @ 8.3 Amps and accept a wide input range. power lead losses. Extensive protection items
The UCQ’s interleaved, synchronous-rectifier
topology offers high efficiency (up to 93%), tight
line and load regulation, low noise and fast step
response. A single-board optimized open-frame
design contributes to impressive thermal opera-
tion. UCQ’s will operate up to +70°C and 100 LFM
airflow with no derating.
avoid damage from out of limit voltages, currents
and temperatures. Protection faults automatically
recover using the hiccup technique. Besides safety
testing to 60950-1, certifications for the UCQ
include application for EMC compliance (to FCC
class B), qualification testing (including HALT) and
CE marking.
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Outstanding thermal performance
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On/off control, trim & sense functions
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Fully isolated, 2250Vdc (BASIC)
Output overvoltage protection
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Fully I/O protected; Thermal shutdown
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Designed to meet UL/EN/IEC60950-1
safety approvals
+SENSE
(7)
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Qual/HALT/EMI tested
+VOUT
(8)
+VIN
(3)
SWITCH
CONTROL
–VOUT
(4)
–VIN
(1)
–SENSE
(5)
PWM
OPTO
REFERENCE &
CONTROLLER
ISOLATION
ERROR AMP
VOUT
TRIM
(6)
INPUT UNDERVOLTAGE, INPUT
OVERVOLTAGE, AND OUTPUT
OVERVOLTAGE COMPARATORS
* Can be ordered with positive (standard) or negative (optional) polarity.
REMOTE
ON/OFF
CONTROL*
(2)
Typical topology may vary between units.
Figure 1. Simplified Schematic
For full details go to
www.murata-ps.com/rohs
www.murata-ps.com
Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000
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