Datasheet

Performance/Functional Specifi cations
Typical @ TA = +25°C under nominal line voltage and full-load conditions, unless noted. ➀
Input
Input Voltage Ranges:
Undervoltage Shutdown ("D24A") 12.25 Volts (typical)
"D5A" Models 4.7-7 Volts (5V nominal)
"D12A" Models 9-18 Volts (12V nominal)
"D24A" Models 18-36 Volts (24V nominal)
"D48A" Models 36-72 Volts (48V nominal)
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Input Filter Type
Pi
Reverse-Polarity Protection Yes (Instantaneous, 6A maximum)
Output
VOUT Accuracy (50% loads):
+5V Output ±0.5%
±12V or ±15V Outputs ±3%
Temperature Coefficient ±0.02% per °C
Ripple/Noise (20MHz BW)
See Ordering Guide
Line/Load Regulation See Ordering Guide
Efficiency See Ordering Guide
Isolation Voltage
1500Vdc, minimum
Isolation Capacitance 300pF
Current Limiting Auto-recovery
Overvoltage Protection Zener/transorb clamps, magnetic feedback
Dynamic Characteristics
Transient Response (50% load step) 200µsec max. to ±2% of final value
Switching Frequency 175kHz
Environmental
Operating Temperature (Ambient):
Without Derating –40 to +60/70°C (Model dependent)
With Derating to +100°C (See Derating Curve)
Storage Temperature –40 to +105°C
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Physical
Dimensions 2" x 1" x 0.375" (51 x 25 x 9.5mm)
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Case Connection Pin 2 (–V
IN)
Case Material Corrosion resistant steel with
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These power converters require a minimum 10% loading on their primary output and a
minimum 20% loading on their auxiliary outputs to maintain specified regulation. Operation
under no-load conditions will not damage these devices; however they may not meet all
listed specifications.
Application-specific internal input/output filtering can be recommended or perhaps added
internally upon request. Contact DATEL Applications Engineering for details.
Devices can be screened or modified for higher guaranteed isolation voltages.
Contact DATEL Applications Engineering for details.
On "D48A" models, the case is connected to pin 1 (+V
IN).
Input Voltage:
"D5A" Models 10 Volts
"D12A" Models 22 Volts
"D24A" Models 44 Volts
"D48A" Models 80 Volts
Input Reverse-Polarity Protection Current must be <6A. Brief
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Output Overvoltage Protection
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±12V Outputs ±13 Volts, limited duration
±15V Outputs ±16 Volts, limited duration
Output Current Current limited.
Max. current and
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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 aect long-term reliability. Proper operation under conditions other
than those listed in the Performance/Functional Specications Table is not
implied.
Absolute Maximum Ratings
TECHNICAL NOTES
Filtering and Noise Reduction
All A-Series TWR 8-11 Watt DC/DC Converters achieve their rated ripple and
noise specifi cations 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. Output capaci-
tors should be connected between their respective output pin (pin 4, 5 or 7)
and Common (pin 6) 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.
To Reduce Input Ripple
"D5A" Models 47μF, 10V
"D12A" Models 20μF, 25V
"D24A" Models 20μF, 50V
"D48A" Models 10μF, 100V
To Reduce Output Ripple
+5V Output 47μF, 10V, Low ESR
±12/15V Outputs 22μF, 20V, Low ESR
In critical, space-sensitive applications, Murata Power Solutions may be able
to tailor the internal input/output fi ltering of these units to meet your specifi c
requirements. Contact our Applications Engineering Group for additional details.
TWR Models
High-Reliability,
2" x 1", 8-11 W, Triple Output DC/DC Converters
MDC_TWR8-11W.D03 Page 3 of 5
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