UST-12-250-D12 데이터 시트보기 (PDF) - DATEL Data Acquisition products
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UST-12-250-D12 Datasheet PDF : 4 Pages
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3W, SINGLE OUTPUT DC/DC CONVERTERS
UST Models
Performance/Functional Specifications
Typical @ TA = +25°C under nominal line voltage and full-load conditions, unless noted. ➀
Input
Input Voltage Range:
"D5" Models
"D12" Models
"D48" Models
4.5-9 Volts (5V nominal)
9-18 Volts (12V nominal)
18-72 Volts (48V nominal)
Input Current
See Ordering Guide
Input Filter Type ➁
Pi
Reverse-Polarity Protection
Yes (Instantaneous, 2A 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 Voltage ➂
1000Vdc, minimum
Current Limiting:
"D5" Models
"D12" and "D48" Models
Power-limiting technique, auto-recovery
Hiccup technique, auto-recovery
Dynamic Characteristics
Transient Response (50% load step) 200µsec to ±1.5% of final value
Switching Frequency:
"D48" Models
"D5" and "D12" Models
200kHz
170kHz
Environmental
Operating Temperature
(Ambient, no derating)
–40 to +75°C
Storage Temperature
–40 to +100°C
Physical
Dimensions
1.25" x 0.8" x 0.45" (31.8 x 20.3 x 11.4mm)
Case Material
Diallyl phthalate, UL94V-0-rated
Pin Material
Brass, solder coated
Weight
0.5 ounces (14.2 grams)
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 internal input/output filtering can be recommended and perhaps added
internally upon request. Contact DATEL Applications Engineering for details.
➂ Devices can be screened or modified for higher guaranteed isolation voltages.
Contact DATEL Applications Engineering for details.
Absolute Maximum Ratings
Input Voltage:
"D5" Models
"D12" Models
"D48" Models
Input Reverse-Polarity Protection
Output Overvoltage Protection
Output Current
Storage Temperature
Lead Temperature (soldering, 10 sec.)
12 Volts
20 Volts
80 Volts
Current must be <2A. Brief duration
only. Fusing recommended.
None
Current limited. Max. current and
short-circuit duration are model
dependent. "D12" and "D48" models
can withstand sustained output short
circuits.
–40 to +100°C
+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.
TECHNICAL NOTES
Floating Outputs
Since these are isolated DC/DC converters, their outputs are "floating."
Users may ground either the Common (pins 5 and 7) for normal usage or
the positive side (+Output, pins 6 and 8) to effectively reverse the output
polarity.
Filtering and Noise Reduction
All UST 3 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
greater than those listed will yield better results.
To Reduce Input Ripple
"D5" Models
"D12" Models
"D48" Models
47µF, 15V
10µF, 35V
4.7µF, 100V
To Reduce Output Ripple
5V Outputs
12/15V Outputs
47µF, 10V, Low ESR
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 require-
ments. Contact our Applications Engineering Group for additional details.
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