Single Output UCQ Models
www.murata-ps.com
Low-Profile, Quarter Brick, 8.3-40 Amp
Isolated DC/DC Converters
Typical units
FEATURES
PRODUCT OVERVIEW
ꢀ
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
ꢀ
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
ꢀ
24V or 48V nominal input
ꢀ
Outputs: 1.2V to 15V
ꢀ
Interleaved synchronous-rectifier topology
• Ultra high efficiency
• No output reverse conduction
Available outputs range between 1.2V @ 30 Amps
to 15V @ 6.7 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 in-
clude application for EMC compliance (to EN55022/
CISPR22 with filter), qualification testing.
ꢀ
Outstanding thermal performance
ꢀ
On/off control, trim & sense functions
ꢀ
Fully isolated, 2250Vdc (BASIC)
Output overvoltage protection
ꢀ
Fully I/O protected; Thermal shutdown
ꢀ
Designed to meet UL/EN/IEC60950-1
safety approvals
+SENSE
(7)
+VOUT
(8)
+VIN
(3)
SWITCH
CONTROL
–VOUT
(4)
–VIN
(1)
–SENSE
(5)
PWM
CONTROLLER
OPTO
ISOLATION
REFERENCE &
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)
Figure 1. Simplified Schematic
For full details go to
www.murata-ps.com/rohs
Typical topology may vary between units.
www.murata-ps.com/support
MDC_UCQ Models.B20 Page 1 of 24