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TWR A-Series
12-15W, Triple Output DC-DC Converters
Performance/Functional Speci?cations
Typical @ T A = +25°C under nominal line voltage and full-load conditions, unless noted. ?
Input
Absolute Maximum Ratings
Input Voltage Range
Input Current
Input Filter Type ?
Reverse-Polarity Protection
Output
V OUT Accuracy (50% loads):
+5V Output
±12V or ±15V Outputs
Temperature Coef?cient
Ripple/Noise (20MHz BW) ?
Line/Load Regulation
Ef?ciency
18-72 Volts (48V nominal)
See Ordering Guide
Pi
Yes (Instantaneous, 6A maximum)
±1%
±3%
±0.02% per °C
See Ordering Guide
See Ordering Guide
See Ordering Guide
Input Voltage:
Input Reverse-Polarity Protection
Output Overvoltage Protection
+5V Output
±12V Outputs
±15V Outputs
Output Current
short-circuit duration are model
dependent
Storage Temperature
Lead Temperature (soldering, 10 sec.)
80 Volts
Current must be <6A. Brief
duration only. Fusing recommended.
6.8 Volts, limited duration
±13 Volts, limited duration
±16 Volts, limited duration
Current limited. Max. current and
–40 to +105°C
+300°C
Isolation Voltage ?
Isolation Capacitance
Current Limiting
Overvoltage Protection
Dynamic Characteristics
1500Vdc, minimum
680pF (1500pF for TWR-5/1000-15/250-D48A )
Auto-recovery
Zener/transorb clamps, magnetic feedback
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 Speci?cations Table is not implied.
Transient Response (50% load step) 200μsec max. to ±2% of ?nal value
T E C H N I C A L
N O T E S
Switching Frequency
Environmental
Operating Temperature (ambient):
165kHz (±15kHz)
Filtering and Noise Reduction
Without Derating
With Derating
Storage Temperature
Physical
Dimensions
Shielding
Case Connection
Case Material
–40 to +50-70°C (Model dependent)
to +100°C (See Derating Curve)
–40 to +105°C
2" x 2" x 0.45" (51 x 51 x 11.4mm)
5-sided
Pin 1 (+V IN )
Corrosion resistant steel with non-conductive,
epoxy-based, black enamel ?nish and plastic
baseplate
All TWR A-Series 12-15 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 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.
Output capacitors should be connected between their respective output pin
(pin 5, 6 or 8) and Common (pin 7) as shown in Figure 2. 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.
Pin Material
Weight
Gold plate copper alloy with nickel underplate
2.6 ounces (74 grams)
To Reduce Input Ripple
10μF, 100V
To Reduce Output Ripple
+5V Output
±12/15V Outputs
47μF, 10V, Low ESR
22μF, 20V, Low ESR
? These power converters require a minimum 10% loading on their primary output and a
minimum 20% loading on their auxiliary outputs to maintain speci?ed regulation. Opera-
tion under no-load conditions will not damage these devices; however they may not meet
all listed speci?cations.
? Application-speci?c internal input/output ?ltering can be recommended and perhaps
added internally upon request. Contact Murato Power Solutions Applications Engineering
for details.
? Devices can be screened or modi?ed for higher guaranteed isolation voltages.
In critical, space-sensitive applications, Murata Power Solutions may be
able to tailor the internal input/output ?ltering of these units to meet your
speci?c requirements. Contact our Applications Engineering Group for
additional details.
Contact Murato Power Solutions Applications Engineering for details.
www.murata-ps.com/support
MDC_TWR12-15.C02 Page 3 of 5
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