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FOR 20W 0 2 e the t s i e S r e , h W NEW e d " 2 x " 2 2" 2" devices DESIGNS n e h i g in t is d t o e ic ri v p l e s - a are u r e p distinguished o d v b by e y rt t their rs e h e i r unique
www.murata-ps.com
Typical unit
FEATURES
TWR A-Series
20W, Triple Output DC-DC Converters
NOT RECOMMENDED
Among the three families of triple-output DC/DC converters in MPS’s
A-Series, u s
“power-sharing ” architecture. This feature enables devices to deliver
the full 20 Watts of output power under a variety of output-loading
conditions.
PRODUCT OVERVIEW
?
?
? Low cost! Highly reliable!
? Full 20 Watts output power
?
?
? Power “user-allocated” among outputs
? Proven SMT-on-pcb construction
?
?
? Qual tested; HALT tested; EMC tested
? Output voltages: +5V/±12V or +5V/±15V
?
?
? Ultra-wide input voltage ranges: 9-36V or 18-75V
? Designed to meet UL1950/EN60950.
BASIC insulation (all 48VIN models)
CE
?
?
?
? ? mark available (75V input models)
? Small packages, 2" x 2" x 0.45"
? Fully isolated, 1500Vdc guaranteed
? Guaranteed ef?ciencies to 82%
?
?
? –40 to +100°C operating temperature
? Modi?cations and customs for OEM’s
Each unit’s primary +5V output can source any cur-
rent up to 3 Amps (primary power = 15W); while its
auxiliary ±12/15V outputs can source currents up to
±500mA (auxiliary power = 12/15W). Devices deliver
any combination of primary plus auxiliary power as
long as the total output power does not exceed 20
Watts. This feature enables designers to select a
single device to ful?ll any number of different require-
ments.
As members of MPS’s new A-Series, the 20W triples
exhibit both low cost and outstanding long-term
reliability. Their design combines straightforward
circuit topologies, the newest components, proven
SMT-on-pcb construction methods, and highly repeat-
able automatic-assembly techniques. Their superior
SIMPLIFIED SCHEMATIC
+V IN
(1)
– V IN
(2)
durability is substantiated by a rigorous in-house
quali?cation program that includes HALT (Highly
Accelerated Life Testing).
Each device has a +5V primary output and either
±12V or ±15V auxiliary outputs. “D12A” models
achieve fully rated performance with inputs ranging
from 9 to 36 Volts. “D48A” models operate over an
input range of 18-75 Volts.
These full-featured triples have non-latching output
current limiting, input overvoltage shutdown, input
reverse-polarity protection, and output overvoltage
clamping to protect both the power converters and
their loads.
+5V
(6)
–12V (–15V)
(8)
+12V (+15V)
ON /O FF
CONTROL
PWM
CONTROLLER
(5)
(4)
COMMON
(7)
OPTO
ISOLAT ION
ERROR
AMPLIFIER
For full details go to
www.murata-ps.com/rohs
www.murata-ps.com/support
MDC_TWR20W.E02 Page 1 of 8
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