TWR A-Series
POWER ELECTRONICS DIVISION
20W, Triple Output DC/DC Converters
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.
FEATURES
PRODUCT OVERVIEW
n cost! Highly reliable!
Low
n 20 Watts output power
Full
Each unit’s primary +5V output can source any current 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 fulfill any number of different requirements.
As members of C&D’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-onpcb construction methods, and highly repeatable automatic-assembly techniques. Their superior durability
n
Power "user-allocated" among outputs
n
Proven SMT-on-pcb construction
n tested; HALT tested; EMC tested
Qual
n
Output voltages: +5V/±12V or +5V/±15V
n
Ultra-wide input voltage ranges: 9-36V or 18-75V
n
Designed to meet UL1950/EN60950.
BASIC insulation (all 48VIN models)
n mark available (75V input models)
CE
n
Small packages, 2" x 2" x 0.45"
Fully
n isolated, 1500Vdc guaranteed
n
Guaranteed efficiencies to 82%
n to +100°C operating temperature
–40
n
Modifications and customs for OEM’s
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
±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.
SIMPLIFIED SCHEMATIC
+5V
+V IN
(1)
(6)
–12V (–15V)
– V IN
(8)
(2)
ON /O FF
CONTROL
+12V (+15V)
(5)
PWM
CONTROLLER
(4)
COMMON
(7)
OPTO
ISOLAT ION
ERROR
AMPLIFIER
For full details go to
www.cd4power.com/rohs
www.cd4power.com
DC/DC CONVERTERS
MDC_TWR20W.A03 Page of 8
