UST-12/250-D12-C Murata Power Solutions Inc, UST-12/250-D12-C Datasheet - Page 3

• Manufacturer Part Number: UST-12/250-D12-C
• Description: DC/DC Converters & Regulators 3W 12V to 12V 250mA
• Manufacturer: Murata Power Solutions Inc
• Series: USTr

Specifications of UST-12/250-D12-C

• Output Power: 3 W
• Input Voltage Range: 9 V to 18 V
• Input Voltage (nominal): 12 V
• Number Of Outputs: 1
• Output Voltage (channel 1): 12 V
• Output Current (channel 1): 250 mA
• Isolation Voltage: 1 KV
• Package / Case Size: SIP
• Product: Isolated
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: UST-12/250-D12-C

Performance/Functional Specifi cations
Typical @ T
Input Voltage Range:
Input Current
Input Filter Type ➁
Reverse-Polarity Protection
V
Temperature Coeffi cient
Ripple/Noise (20MHz BW) ➁
Line/Load Regulation
Effi ciency
Isolation Voltage ➂
Short Circuit Protection: ➃
Transient Response (50% load step)
Switching Frequency:
Operating Temperature
Storage Temperature
Dimensions
Case Material
Pin Material
Weight
➀ These power converters require a minimum 10% loading to maintain specifi ed regulation.
➁ Application-specifi c internal input/output fi ltering can be recommended for quantity orders
➂ Devices can be screened for quantity orders or modifi ed for higher guaranteed isolation
➃ The current limit inception point is dependent on the input voltage. Therefore, it is possible
OUT
"D5" Models
"D12" Models
"D48" Models
"D5" Models
"D12" and "D48" Models
"D48" Models
"D5" and "D12" Models
(Ambient, no derating)
Operation under no-load conditions will not damage these devices; however, they may not
meet all listed specifi cations.
and perhaps added internally upon request. Contact DATEL Applications Engineering for
details.
voltages. Contact DATEL Applications Engineering for details.
to draw current beyond the rated capacity. Users should fully characterize their load condi-
tions.
Accuracy (50% load)
A
= +25°C under nominal line voltage and full-load conditions, unless noted.
Dynamic Characteristics
Environmental
Physical
Output
Input
4.5-9 Volts (5V nominal)
9-18 Volts (12V nominal)
200kHz
170kHz
18-72 Volts (48V nominal)
See Ordering Guide
Pi
Yes (Instantaneous, 2A maximum)
±1%, maximum
±0.02% per °C
See Ordering Guide
See Ordering Guide
See Ordering Guide
1000Vdc, minimum
Power-limiting technique, auto-recovery
Hiccup technique, auto-recovery
200µsec to ±1.5% of fi nal value
–40 to +75°C
–40 to +100°C
1.25" x 0.8" x 0.45" (31.8 x 20.3 x 11.4mm)
Diallyl phthalate, UL94V-0-rated
Gold-plated copper alloy w/nickel underplate
0.5 ounces (14.2 grams)
www.murata-ps.com
➀
Floating Outputs
Since these are isolated DC/DC converters, their outputs are "fl oating."
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
specifi cations without the use of external input/output capacitors. In criti-
cal 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.
In critical, space-sensitive applications, DATEL may be able to tailor the in-
ternal input/output fi ltering of these units to meet your specifi c requirements.
Contact our Applications Engineering Group for additional details.
Input Voltage:
Input Reverse-Polarity Protection
Output Overvoltage Protection
Output Current
Storage Temperature
Lead Temperature (soldering, 10 sec.)
These are stress ratings. Exposure of devices to greater than any of these conditions
may adversely affect long-term reliability. Proper operation under conditions other than
those listed in the Performance/Functional Specifi cations Table is not implied.
T E C H N I C A L N O T E S
To Reduce Input Ripple
To Reduce Output Ripple
"D5" Models
"D12" Models
"D48" Models
"D5" Models
"D12" Models
"D48" Models
5V Outputs
12/15V Outputs
3W, Single Output DC/DC Converters
Absolute Maximum Ratings
47µF, 15V
10µF, 35V
4.7µF, 100V
47µF, 10V, Low ESR
22µF, 20V, Low ESR
03 Dec 2009 MDC_UST_3W_B02 Page 3 of 4
12 Volts
20 Volts
80 Volts
Current must be <2A. Brief duration
only. Fusing recommended.
None
Maximum current and short-circuit
duration are model dependent. "D12"
and "D48" models can withstand
sustained output short circuits.
–55 to +100°C
+280°C
UST Models
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