UHE Series
P O W E R E L E C T R O N I C S D I V I S I O N
Isolated, High Efficiency, ꢀ.6" x 2" 2-ꢀ0 Amp, ꢀ2-30 Watt DC/DC's
Housed in smaller, ꢀ.6" x 2" x 0.40" (4ꢀ x 5ꢀ x ꢀ0.2mm) packages
carrying the standard 2" x 2" pinout, C&D's new UHE Series DC/
DC Converters deliver more current/power (up to ꢀ0A/30W) than
currently available from either package size.
FEATURES
PRODUCT OVERVIEW
nꢀThe most IOUT/POUT in this format
nꢀLower priced than bricks
The UHE ꢀ2-30W Series of high-efficiency, isolated
DC/DC's provide output power ranging from ꢀ0
Amps @ ꢀ.2V to 2 Amps @ ꢀ5V. Offering both
2:ꢀ and 4:ꢀ input voltage ranges, UHE's meet VIN
requirements from 9 to 75 Volts.
shortcomings–output reverse conduction.
All devices feature full I/O fault protection including:
input overvoltage and undervoltage shutdown,
precise output overvoltage protection (a rarity on
low-voltage outputs), output current limiting, short-
circuit protection, and thermal shutdown.
nꢀSmall ꢀ.6" x 2" x 0.4" plastic package with
standard 2" x 2" pinout
nꢀOutput configurations:
ꢀ.2/ꢀ.5/ꢀ.8/2.5VOUT @ ꢀ0 Amps
3.3/5VOUT @ 25 Watts
Taking full advantage of the synchronous-recti-
fier, forward topology, UHE's boast outstanding
efficiency (some models exceed 9ꢀ%) enabling
full-power operation to ambient temperatures as
high as +60°C, without air flow. Assembled using
fully automated, SMT-on-pcb techniques, UHE's
provide stable no-load operation, excellent line
( 0.ꢀ%) and load ( 0.ꢀ5%) regulation, quick step
response (200µsec), and low output ripple/noise
(50-ꢀ00mVp-p). Additionally, the UHE's unique
output design eliminates one of the topology's few
All UHE models incorporate a VOUT Trim function and
an On/Off Control pin (positive or negative polarity).
Low-voltage models (ꢀ.2V to 5V) offer optional
sense pins facilitating either remote load regula-
tion or current sharing for true N+ꢀ redundancy.
All models are certified to the BASIC insulation
requirements of UL/EN60950, and 48VIN (75V max.)
models carry the CE mark. Selected models are
RoHS compliant (Reduction of Hazardous Sub-
stances).
5/ꢀ2/ꢀ5VOUT @ 30 Watts
nꢀFive input ranges from 9-75 Volts
nꢀEfficiencies as high as 9ꢀ.5%
nꢀStable no-load operation
nꢀOptional Sense pins for low VOUT
nꢀThermal shutdown, I/O protected
nꢀꢀ500 Vdc I/O BASIC Insulation
nꢀUL/EN60950 certified; CE marked for Q48
models
SIMPLIFIED SCHEMATIC
+INPUT
(1)
+OUTPUT
(6)
nꢀRoHS compliant
SWITCH
CONTROL
+SENSE
(5)
–OUTPUT
(7)
OPTO
ISOLATION
–SENSE
(8)
THERMAL
SHUTDOWN
*
–INPUT
(2)
OVERVOLTAGE
COMPARATOR
PWM
CONTROLLER
OPTO
ISOLATION
REFERENCE &
ERROR AMP
V
OUT TRIM
(9)
UVLO & OVLO
COMPARATORS
ON/OFF
CONTROL
(4)
Optional comparator feedback. Contact DATEL.
Sense pins are optional on ꢀ.2-5VOUT models ("R" suffix).
*One phase of two is shown.
Typical topography is shown.
For full details go to
www.cd4power.com/rohs
DC/DC CONVERTERS
MDC_UHE_A01 Page ꢀ of ꢀ4
www.cd4power.com