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UWR Series
Single Output, High Reliability, 2" x 2", 14-20 Watt, DC/DC Converters
Performance/Functional Speci?cations
Typical @ T A = +25°C under nominal line voltage and full-load conditions, unless noted. ?
Input Voltage Range:
Input
Absolute Maximum Ratings
D5A Models
4.7-7.5 Volts (5V nominal)
Input Voltage:
D12A Models
D48A/D48E Models
Input Current
Input Filter Type
Overvoltage Shutdown:
D5A Models
D12A Models
D48A and /D48E Models
Reverse-Polarity Protection
On/Off (Sync.) Control (Pin 4) ?
V OUT Accuracy (50% load)
Temperature Coef?cient
9-36 Volts (24V nominal)
18-75/36-72 Volts (48V nominal)
See Ordering Guide
Pi (C-type for D5A models)
10 Volts
40 Volts
80 Volts
Yes (Instantaneous, 10A maximum)
TTL high = off, low (or open) = on
Output
±1%, maximum
±0.02% per °C
"D5A" Models
"D12A" Models
"D48A" and "D48E" Models
Input Reverse-Polarity Protection
Output Overvoltage Protection:
3.3V Outputs
5V/5.2V Outputs
12V Outputs
15V Outputs
Output Current
Storage Temperature
Lead Temperature
11 Volts
44 Volts
88 Volts
Current must be <10A. Brief
duration only. Fusing recommended.
No protection
6.8 Volts, limited duration
15 Volts, limited duration
18 Volts, limited duration
Current limited. Max. current and
short-circuit duration are model
dependent
–40 to +105°C
See soldering guidelines
Ripple/Noise (20MHz BW)
Line/Load Regulation
Ef?ciency
Isolation Voltage ?
Isolation Capacitance
Current Limiting
Overvoltage Protection
See Ordering Guide
See Ordering Guide
See Ordering Guide
1500Vdc guaranteed
550pF
Auto-recovery
Zener/transorb clamp, magnetic feedback
Dynamic Characteristics
These are stress ratings. Exposure of devices in excess of these conditions may
adversely affect long-term reliability. Proper operation under conditions other than those
listed in the Performance/Functional Speci?cations Table is not implied.
TECHNICAL NOTES
Floating Outputs
Transient Response (50% load step)
Switching Frequency
200μsec max. to ±1.5% of ?nal value
165kHz (±15kHz)
Since these are isolated DC/DC converters, their outputs are "?oating."
Users may ground either the Common (pin 7) for normal usage or the posi-
Environmental
tive side (+Output, pin 6) to effectively reverse the output polarity.
Operating Temperature (Ambient) :
Without Derating
With Derating
Storage Temperature
Flammability
Dimensions
Shielding
Case Connection:
D5A, D12A Models
D48A, D48E Models
–40 to +40/50/55/65°C (Model dependent)
to +100°C (See Derating Curves)
-40 to +105°C
UL94V-0
Physical
2" x 2" x 0.45" (51 x 51 x 11.4mm)
5-sided
Pin 2 (–V IN )
Pin 1 (+V IN )
Filtering and Noise Reduction
All A-Series UWR 14-20 Watt DC/DC Converters achieve their rated ripple
and noise speci?cations without the use of external input/output capaci-
tors. In critical applications, input/output noise may be further reduced by
installing electrolytic capacitors across the input terminals and/or low-ESR
tantalum or electrolytic capacitors across the output terminals. The caps
should be located as close to the power converters as possible. Typical
values are listed below. In many applications, using values greater than
those listed will yield better results.
To Reduce Input Ripple
Case Material
Pin Material
Weight
Corrosion resistant steel with
non-conductive, epoxy-based, black
enamel ?nish and plastic baseplate
RoHS: Gold-plated copper alloy
Non-RoHS: Tin over copper alloy
2.7 ounces (76.5 grams)
D5A Models
D12A Models
D48A Models
To Reduce Output Ripple
3.3V Outputs
47μF, 16V
20μF, 50V
20-50μF, 100V
100μF, 6V, Low ESR
? These converters require a minimum 10% loading to maintain speci?ed regulation. Operation
under no-load conditions will not damage these devices; however they may not meet all listed
5V/5.2V Outputs
12/15V Outputs
47μF, 10V, Low ESR
22μF, 20V, Low ESR
speci?cations.
? Applying a voltage to the Control pin when no input power is applied to the converter can
cause permanent damage to the converter. TTL Logic High of +3.3V to +5V max will disable
the converter.
? "D48A" models have BASIC, all other models have Functional insulation. Devices can be
screened or modi?ed for higher guaranteed isolation voltages. Contact DATEL Applications
Engineering for details.
www.murata-ps.com/support
MDC_UWR14-20 Series.F02 Page 3 of 6
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