®
DFC10 SERIES
DUAL OUTPUT
DESCRIPTION
The dual output DFC10 Series provides power solutions to meet
commercial and industrial requirements. With power densities
above 11 watts per cubic inch (0.67 watts per cm
3
), overcurrent
protection, and five sided shielded case, the DFC10 meets rigorous
needs in an industry standard case size. The 120KHz operating
frequency of the DFC10 Series allows an increased power density
while including adequate heat sinking and input/output filtering.
This eliminates the need for external components in most
applications. Full overload protection is provided by pulse-by-pulse
current limiting on models with 48V input.
Selection Chart
Model
DFC10U24D5
DFC10U24D12
DFC10U24D15
DFC10U48D5
DFC10U48D12
DFC10U48D15
Input Range
VDC
Min
9
9
9
18
18
18
Max
36
36
36
72
72
72
VDC
±5
±12
±15
±5
±12
±15
Output
mA
±850
±400
±320
±800
±415
±330
Power
W
9
10
10
8
10
10
0.300
(7.62)
0.000
0.100
(2.54)
0.200
(5.08)
0.500
(12.70)
0.61
(15.5)
1
4
2
5
FEATURES
•
High Power Density, up to 11 Watts per Cubic Inch
•
Efficiencies to 79%
•
Fully Isolated, Fully Filtered Design
•
Greater than 700V Isolation
•
Overcurrent Protection
•
Five-Side Shielded Copper Case
•
Ultra Wide Range Input (4:1)
BOTTOM VIEW
2.02
(51.31)
3
SIDE VIEW
0.040 (1.02)
DIA TYP
1.02
(25.91)
0.800
(20.32)
General Specifications (1)
All Models
ON/OFF Function
OFF Logic Level
or Tie Pin to -Input
Open Circuit Voltage
Input Resistance
Converter Idle Current
ON/OFF Pin Low
Isolation (2)
Isolation Voltage
Input to Output
10
µ
A Leakage
Input to Output
Capacitance
Enviromental
Case Operating Range, Tc
Case Functional Range (3)
Storage Range
General
MTBF (Calculated)
Thermal Impedance (4)
Unit Weight
Mounting Options
Chassis Mounting Kit 24V
Chassis Mounting Kit 48V
MAX
TYP
TYP
TYP
<0.4
1.4
2
6
VDC
VDC
Kohms
mA
Units
Mechanical tolerances unless otherwise noted:
X.XX dimensions:
±0.03
inches
X.XXX dimensions:
±0.005
inches
Pin
1
2
3
4
5
Function
+ INPUT
- INPUT
+ OUTPUT
COMMON
- OUTPUT
MIN
TYP
700
350
-40
85
-50
100
-55
105
800,000
16
1.2/34
CM2B2
CM2A2
VDC
pF
NOTES
MIN
MAX
MIN
MAX
MIN
MAX
TYP
TYP
TYP
(1)
°C
°C
°C
(4)
(2)
(3)
HRS
° C/Watt
oz/gm
All parameters measured at Tc = 25°C, nominal input voltage and full rated load unless otherwise noted.
Refer to the DC/DC Technical Reference Section for the definition of terms, measurement circuits and
other information.
Case is tied to the COMMON output pin.
The functional temperature range is intended to give an additional data point for use in evaluating this
power supply. At the low functional temperature the power supply will function with no side effects,
however, sustained operation at the high functional temperature will reduce expected operational life.
The data sheet specifications are not guaranteed beyond the case operating range.
The case thermal impedance is specified as the case temperature rise over ambient per package watt
dissipated.
36
0.42
(10.67)
0.61
(15.5)
0.000
0.3
(7.62)
0.000
(800) 678-9445 • FAX: (805) 388-0476
DFC10 SERIES DUAL OUTPUT
Input Parameters
(1)
Model
Voltage Range
Input Current Full Load
No Load
Efficiency
Switching Frequency
Maximum Input
Overvoltage,
100ms Maximum
Turn-on Time,
1% Output Error
MIN
MAX
TYP
TYP
TYP
TYP
MAX
TYP
DFC10U24D5
DFC10U24D12
9
36
510
15
78
100
45
20
DFC10U24D15
DFC10U48D5
DFC10U48D12
18
72
265
4
78
120
85
DFC10U48D15
Units
VDC
260
4
79
mA
%
kHz
VDC
ms
450
10
79
510
15
78
210
2
79
Output Parameters
(1)
Model
Output Voltage
Output Voltage
Accuracy
Rated Load Range (3)
Load Regulation (4)
25% Max load to
Max Load
Cross Regulation (5)
Line Regulation
Short Term Stability (6)
Long Term Stability
Noise, Peak - Peak (2)
RMS Noise
Temperature
Coefficient
Short Circuit Protection
NOTES
(1)
All parameters measured at Tc = 25°C, nominal input voltage and full rated load unless otherwise
noted. Refer to the DC/DC Technical Reference Section for the definition of terms, measurement
circuits and other information.
Noise is measured per DC/DC Technical Reference Section. Measurement bandwidth is 0-20 MHz.
RMS noise is measured over a 0.01-1 MHz bandwidth. To simulate standard PCB decoupling
practices, output noise is measured with a 10µf tantalum and 0.01µF ceramic capacitor located 1 inch
away from the converter.
The converter may be safely operated at any load from zero to the full rating. Dynamic response of
the converter may degrade if the converter is operated with less than 25% output load.
Load regulation is defined for loading/unloading both outputs simultaneously. Load range is 25 to
100%.
Cross regulation is defined for loading/unloading one output while the other output is kept
at full load. Load range is 25 to 100%.
Short term stability is specified after a 30 minute warmup at full load, constant line and
recording the drift over a 24 hour period.
DFC10U24D5
MIN
TYP
MAX
MIN
MAX
TYP
MAX
TYP
TYP
MAX
TYP
TYP
TYP
TYP
TYP
MAX
±5
±
4.95
±
5.00
±
5.05
0
±
850
0.1
0.5
3
0.1
0.7
DFC10U24D12
±
12
±
11.90
±
12.00
±
12.10
0
±
400
0.1
0.5
3
0.1
0.3
< 0.01
< 0.1
DFC10U24D15
±
15
±
14.90
±
15.00
±
15.10
0
±
320
0.1
0.5
3
0.1
0.3
DFC10U48D5
±5
±
4.95
±
5.00
±
5.05
0
±
800
0.3
1.0
3
0.3
0.75
DFC10U48D12
±
12
±
11.90
±
12.00
±
12.10
0
±
415
0.2
1.0
3
0.1
0.5
< 0.01
< 0.1
DFC10U48D15
±
15
±
14.90
±
15.00
±
15.10
0
±
330
0.2
1.0
3
0.1
0.5
Units
VDC
VDC
mA
%
%
%
%/24Hrs
%/kHrs
mV
PP
mV
rms
ppm/
°C
100
35
50
250
Short Term Current Limit
Pulse by Pulse Current Limit
DFC10 SERIES APPLICATION NOTES:
External Capacitance Requirements
No external capacitance is required for operation of the DFC10
Series. If a capacitive input source is farther than 1” from the
converter, an additional capacitor may be required at the input
pins for proper operation. This input capacitor should have an
ESR greater than 0.25 ohms. Input capacitors with an ESR less
than 0.25 ohms may cause peaking of the input filter and actually
degrade circuit performance.
External output capacitance is not required for operation, however
it is recommended that 1 F to 10 F of tantalum and 0.001 to
0.1 F ceramic capacitance be selected for reduced system noise.
Additional output capacitance may be added for increased
filtering, but should not exceed 400 F.
A
(2)
(3)
(4)
(5)
(6)
37
®
DFC10 SERIES DUAL OUTPUT
DFC10 SERIES BLOCK DIAGRAM
SHIELDED ISOLATION TRANSFORMER
OUTPUT POWER DERATING
10
+
+
+ INPUT
3
+ OUTPUT
4
CMN
5
– OUTPUT
POWER OUTPUT
1
8
– INPUT
2
CURRENT
MODE
PWM
+
–
6
FIVE SIDED SHIELDED COPPER CASE
LOW DRIFT
BANDGAP REFERENCE
50
60
70
80
90
AMBIENT TEMPERATURE
100
24 Volt Input
INPUT CURRENT (AMPS)
INPUT CURRENT Vs. INPUT VOLTAGE
2.5
2.0
EFFICIENCY Vs. LOAD
85
LINE = 9VDC
80
EFFICIENCY (%)
Typical Performance:
(Tc=25°C, Vin=Nom VDC,
Rated Load)
75
70
65
60
LINE = 24VDC
LINE = 36VDC
0
10
20
30
40
50
60
70
80
90 100
1.5
1.0
0.5
50% LOAD
0.0
0
5
10
15
20
25
30
35
40
100% LOAD
55
LINE INPUT (VOLTS)
LOAD (%)
EFFICIENCY Vs. LINE INPUT VOLTAGE
RMS INPUT CURRENT Vs. LINE INPUT
RMS INPUT CURRENT (AMPS)
1.0
100% LOAD
0.8
0.6
75% LOAD
0.4
50% LOAD
0.2
0.0
8
12
16
20
24
28
32
36
90
85
EFFICIENCY (%)
50% FULL LOAD
80
75
70
65
60
8
12
16
20
24
28
32
36
100% FULL LOAD
LINE INPUT (VOLTS)
INPUT CURRENT Vs. INPUT VOLTAGE
LINE INPUT (VDC)
EFFICIENCY Vs. LOAD
90
48 Volt Input
Typical Performance:
(Tc=25°C, Vin=Nom VDC,
Rated Load)
INPUT CURRENT (AMPS)
1.0
0.8
EFFICIENCY (%)
85
LINE = 18VDC
LINE = 48VDC
0.6
100% LOAD
0.4
0.2
50% LOAD
0.0
0
10
20
30
40
50
60
70
80
80
75
LINE = 72VDC
70
0
10
20
30
40
50
60
70
80
90 100
LINE INPUT (VOLTS)
EFFICIENCY Vs. LINE INPUT VOLTAGE
90
LOAD (%)
RMS INPUT CURRENT Vs. LINE INPUT
RMS INPUT CURRENT (AMPS)
0.8
100% LOAD
0.6
75% LOAD
0.4
50% LOAD
0.2
EFFICIENCY (%)
85
50% FULL LOAD
80
100% FULL LOAD
75
70
15
25
35
45
55
65
75
0.0
15
25
35
45
55
65
75
LINE INPUT (VOLTS)
LINE INPUT (VOLTS)
38
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