Datasheet

FEATURES
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Standard quarter-brick package/pinout
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Outputs from 1.5 to 48V up to 125W
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Low profile 0.42" height
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24 and 48Vdc nominal inputs
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Fully isolated, 2250Vdc (BASIC) insulation
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Designed for RoHS-6 compliance
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Output overvoltage/short-circuit protected
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On/Off control, trim and sense functions
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High efficiency to 92%
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Protected against temp. and voltage limits
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Designed to meet UL/IEC/EN60950-1 safety
approvals
Typical unit
For efficient, fully isolated DC power in the small-
est space, Murata Power Solutions' UVQ series
quarter bricks offer output voltages from 1.5
to 48Volts with currents up to 40 Amps. UVQs
operate over a wide temperature range (up to
+70°C at 200 lfm airflow) at full-rated power. The
optional mounting baseplate extends this to all
practical temperature ranges at full power.
UVQs achieve these impressive specifications
while delivering excellent electrical performance.
Overall noise is 35mVp-p (3.3V models) with fast
step response (down to 50µsec). These convert-
ers offer high stability even with no load and
tight output regulation. The unit is fully protected
against input over and undervoltage, output over-
current and short circuit. An on-board temperature
sensor shuts down the converter if thermal limits
are reached. Protection uses the “hiccup” (auto
restart) method.
A convenient remote On/Off control input oper-
ates by external digital logic, relay or transistor
input. To compensate for longer wiring and to
retain output voltage accuracy at the load, UVQs
include a Sense input to dynamically correct for
ohmic losses. A trim input may be connected to a
user’s adjustment potentiometer or trim resis-
tors for output voltage calibration closer than the
standard accuracy.
UVQs include industry-standard safety certifica-
tions and BASIC I/O insulation provides 2250 Volt
input/output isolation. Radiation emission testing
is performed to widely-accepted EMC standards.
The UVQs may be considered as higher perfor-
mance replacements for some Murata Power
Solutions USQ models.
PRODUCT OVERVIEW
–V IN
(3)
+V
IN
(1)
OPTO
ISOLATION
PWM
CONTROLLER
REFERENCE &
ERROR AMP
INPUT UNDERVOLTAGE, INPUT
OVERVOLTAGE, AND OUTPUT
OVERVOLTAGE COMPARATORS
* Can be ordered with positive (standard) or negative (optional) polarity.
REMOTE
ON/OFF
CONTROL*
(2)
+SENSE
(7)
–SENSE
(5)
+V
OUT
(8)
V
OUT
TRIM
(6)
–V
OUT
(4)
SWITCH
CONTROL
Baseplate
(9)
Optional
Figure 1. Simplified Schematic
Typical configuration — some models use a different topology
MDC_UVQ Models.F04 Page 1 of 25
UVQ Series
Low Profile, Isolated Quarter Brick
2.5–40 Amp DC-DC Converters
www.murata-ps.com
www.murata-ps.com/suppor t
For full details go to
www.murata-ps.com/rohs