A Series
1 5 - 2 0 W, D UA L O U T P U T D C / D C C O N V E RT E R S
Performance/Functional Specifications
Typical @ T
A
= +25°C under nominal line voltage and full-load conditions, unless noted.
➀
Input
Input Voltage Range:
D5A Models
D12A Models
D48A Models
Input Current
Input Filter Type
➁
Overvoltage Shutdown:
D5A Models
D12A Models
D48A Models
Reverse-Polarity Protection
On/Off (Sync.) Control
(Pin 4)
➂
V
OUT
Accuracy
(50% load):
±5V Outputs
±9/12/15V Outputs
Temperature Coefficient
Ripple/Noise
(20MHz BW)
➁
Line/Load Regulation
Efficiency
Isolation Voltage
➃
Isolation Capacitance
Current Limiting
Overvoltage Protection
Transient Response
(50% load step)
Switching Frequency
Operating Temperature
(ambient):
Without Derating
With Derating
Storage Temperature
Flammability
Dimensions
Shielding
Case Connection:
D5A and D12A Models
D48A Models
Case Material
4.7-7.5 Volts (5V nominal)
9-36 Volts (24V nominal)
18-75 Volts (48V nominal)
See Ordering Guide
Pi
10 Volts
40 Volts
80 Volts
Yes (Instantaneous, 10A maximum)
TTL high = off, low (or open) = on
Input Voltage:
D5A Models
D12A Models
D48A Models
Absolute Maximum Ratings
12 Volts
44 Volts
88 Volts
Current must be <10A. Brief
duration only. Fusing recommended.
6.8 Volts, limited duration
15 Volts, limited duration
18 Volts, limited duration
Current limited. Max. current and
short-circuit duration are model
dependent.
–40 to +105°C
+300°C
Input Reverse-Polarity Protection
Output Overvoltage Protection
±5V Outputs
±12V Outputs
±15V Outputs
Output Current
Output
±1.5%, maximum
±1%, maximum
±0.02% per °C
See Ordering Guide
See Ordering Guide
See Ordering Guide
1500Vdc, minimum
550pF
Auto-recovery
Zener/transorb clamps, magnetic feedback
Storage Temperature
Lead Temperature
(soldering, 10 sec.)
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." Any
BWR model may be configured to produce an output of 10V, 24V or 30V
(for
±
5V,
±
12V or
±
15V models, respectively) by applying the load across
the +Output and –Output pins (pins 5 and 7), with either output grounded.
The Common pin (pin 6) should be left open. Minimum 20% loading is
recommended under these conditions. The total output voltage span may be
externally trimmed as described below.
Filtering and Noise Reduction
All A-Series BWR 15-20 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. Output capac-
itors should be connected between their respective output pin (pin 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 in the tables
below. In many applications, using values greater than those listed will yield
better results.
To Reduce Input Ripple
D5A Models
D12A Models
D48A Models
To Reduce Output Ripple
±5V Outputs
±9/12/15V Outputs
47µF, 16V
20µF, 50V
20µF, 100V
47µF, 10V, Low ESR
22µF, 20V, Low ESR
Dynamic Characteristics
200µsec max. to ±1.5% of final value
165kHz (±15kHz)
Environmental
–40 to +50/55/60°C (Model dependent)
to +100°C (See Derating Curves)
–40 to +105°C
UL 94V-0
Physical
2" x 2" x 0.45" (51 x 51 x 11.4mm)
5-sided
Pin 2 (–V
IN
)
Pin 1 (+V
IN
)
Corrosion resistant steel with
non-conductive, epoxy-based, black
enamel finish and plastic baseplate
Gold-plated copper alloy
2.7 ounces (75.6 grams)
Pin Material
Weight
➀
These converters require a minimum 20% loading on each output 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 C&D Applications Engineering for details.
➂
Applying a voltage to the Control pin when no input power is applied to the converter can
cause permanent damage to the converter.
➃
"D48A" models have BASIC, "D5A" and "D12A" models have Functional insulation.
Devices can be screened or modified for higher guaranteed isolation voltages.
Contact C&D Applications Engineering for details.
In critical, space-sensitive applications, C&D may be able to tailor the internal
input/output filtering of these units to meet your specific requirements. Con-
tact our Applications Engineering Group for additional details.
www.cd4power.com
3
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