UWR Models
6-10W, SINGLE OUTPUT DC/DC CONVERTERS
3
Input Voltage:
"D5A" Models 10 Volts
"D12A" Models 22 Volts
"D24E" Models 44 Volts
"D48A and D48E" Models 80 Volts
Input Reverse-Polarity Protection Current must be <6A. Brief
duration only. Fusing recommended.
Output Overvoltage Protection
5/5.2V Outputs 6.8 Volts, limited duration
12V Outputs 15 Volts, limited duration
15V Outputs 18 Volts, limited duration
Output Current Current limited.
Max. current and
short-circuit duration model
dependent.
Storage Temperature –40 to +105°C
Lead Temperature (soldering, 10 sec.) +300°C
These are stress ratings. Exposure of devices to any of these conditions may adversely
affect long-term reliability. Proper operation under conditions other than those listed in the
Performance/Functional Specifications Table is not implied.
Absolute Maximum Ratings
TECHNICAL NOTES
➀
These power converters require a minimum 10% loading to maintain specified regulation.
Operation under no-load conditions will not damage these devices; however they may not
meet all listed specifications.
➁
Application-specific input/output filtering can be recommended and perhaps added
internally upon request. Contact DA TEL Applications Engineering for details.
➂
Devices can be screened or modified for higher guaranteed isolation voltages.
Contact DA TEL Applications Engineering for details .
➃
Except for 3.3V devices which have no protection.
Performance/Functional Specifications
T ypical @ TA = +25°C under nominal line voltage and full-load conditions, unless noted.
➀
Input
Input Voltage Range:
"D5A" Models 4.7-7.25 Volts (5V nominal)
"D12A" Models 9-18 Volts (12V nominal)
"D24E" Models 18-36Volts (24V nominal
"D48A" Models 18-72 Volts (48V nominal)
"D48E" Models 36-72 Volts (48V nominal)
Input Current See Ordering Guide
Input Filter Type
➁
Pi
Overvoltage Shutdown:
"D5A" Models None
"D12A" Models 20 Volts
"D24E" Models 40 Volts
"D48A and D48E" Models 76 Volts
Reverse-Polarity Protection Y es (Instantaneous , 6A maximum)
Output
VOUT Accuracy (50% load) ±1%, maximum
Temperature Coefficient ±0.02% per °C
Ripple/Noise (20MHz BW)
➁
See Ordering Guide
Line/Load Regulation See Ordering Guide
Efficiency See Ordering Guide
Isolation V oltage
➂
1500Vdc, guaranteed
Isolation Capacitance 250pF
Current Limiting Auto-recovery
Overvoltage Protection
➃
Zener/transorb clamp, magnetic feedback
Dynamic Characteristics
Transient Response (50% load step) 200µsec max. to ±1.5% of final value
Switching Frequency 165kHz (±15kHz)
Environmental
Operating Temperature (Ambient):
Without Derating –40 to +60/65/70°C (Model dependent)
With Derating to +100°C (See Derating Curves)
Storage Temperature –40 to +105°C
Physical
Dimensions 2" x 1" x 0.375" (51 x 25 x 9.5mm)
Shielding 5-sided
Case Connection:
"D5A, D12A and D24E" Models Pin 2 (–V
IN)
"D48A and D48E" Models Pin 1 (+VIN)
Case Material Corrosion resistant steel with
non-conductive, epoxy-based, black
enamel finish and plastic baseplate
Pin Material Brass, solder coated
Weight 1.3 ounces (37 grams)
Floating Outputs
Since these are isolated DC/DC converters, their outputs are "floating."
Designers will usually use the output Common (pin 5) as the ground/return of
the load circuit. Y ou can, howe ver , use the +Output (pin 3) as ground/return to
effectively re verse the output polarity .
Filtering and Noise Reduction
All A-Series UWR 6-10 Watt DC/DC Converters achieve their rated ripple and
noise specifications without the use of external input/output capacitors. In
critical applications, input/output ripple and 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 in the tables below . In many applications, using values g reater than those
listed will yield better results.
T o Reduce Input Ripple
"D5A" Models 47µF, 10V
"D12A and D24E" Models 20µF, 50V
"D48A and D48E" Models 10µF , 100V
T o Reduce Output Ripple
5/5.2V Outputs 47µF , 10V , Low ESR
12/15V Outputs 22µF, 20V , Low ESR
In critical, space-sensitive applications, DATEL may be able to tailor the internal
input/output filtering of these units to meet your specific requirements. Contact
our Applications Engineering Group for additional details.