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MDC_TWR20W.A03 Page of 8
TWR A-Series
20W, Triple Output DC/DC Converters
P O W E R E L E C T R O N I C S D I V I S I O N
D C / D C C O N V E R T E R S
www.cd4power.com
FEATURES
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Low cost! Highly reliable!
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Full 20 Watts output power
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Power "user-allocated" among outputs
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Proven SMT-on-pcb construction
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Qual tested; HALT tested; EMC tested
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Output voltages: +5V/±2V or +5V/±5V
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Ultra-wide input voltage ranges: 9-36V or 8-75V
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Designed to meet UL950/EN60950.
BASIC insulation (all 48VIN models)
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CE mark available (75V input models)
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Small packages, 2" x 2" x 0.45"
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Fully isolated, 500Vdc guaranteed
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Guaranteed efficiencies to 82%
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–40 to +00°C operating temperature
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Modifications and customs for OEM’s
Each unit’s primary +5V output can source any cur-
rent up to 3 Amps (primary power = 5W); while its
auxiliary ±2/5V outputs can source currents up to
±500mA (auxiliary power = 2/5W). 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 fulfill any number of different require-
ments.
As members of C&D’s new A-Series, the 20W triples
exhibit both low cost and outstanding long-term reli-
ability. Their design combines straightforward circuit
topologies, the newest components, proven SMT-on-
pcb construction methods, and highly repeatable auto-
matic-assembly techniques. Their superior durability
is substantiated by a rigorous in-house qualification
program that includes HALT (Highly Accelerated Life
Testing).
Each device has a +5V primary output and either
±2V or ±5V auxiliary outputs. "D2A" models
achieve fully rated performance with inputs ranging
from 9 to 36 Volts. "D48A" models operate over an
input range of 8-75 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.
SIMPLIFIED SCHEMATIC
PRODUCT OVERVIEW
Among the three families of triple-output DC/DC converters in C&D’s
A-Series, the 20W 2" x 2" devices are distinguished by their unique
"power-sharing" architecture. This feature enables devices to deliver
the full 20 Watts of output power under a variety of output-loading
conditions.
OPTO
ISOLAT ION
+5V
–12V (–15V)
ERROR
AMPLIFIER
PWM
CONTROLLER
+V
(1)
(2)
(4)
(5)
(6)
(7)
(8)
IN
–VIN
+12V (+15V)
COMMON
ON /O FF
CONTROL
For full details go to
www.cd4power.com/rohs