DFC10 SERIES
SINGLE OUTPUT
DESCRIPTION
The DFC10 Series provides power converter 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 the
most rigorous needs in an industry standard case size. The
220KHz 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.
FEATURES
• High Power Density, up to
11 Watts per Cubic Inch (0.67 watts per cm
3
)
• Efficiencies to 83% (Lower for 3.3V)
• Low Input to Output Capacitance
• 700V Isolation(1544V for 48V Converters)
• Continuous Overcurrent Protection
• 3.3Volt Output Available
• Five-Side Shielded Copper Case
• Extended Input Range (2:1)
BOTTOM VIEW
2.02
(51.31)
0.300
(7.62)
0.000
0.200
(5.08)
0.500
(12.70)
0.61
(15.5)
0.61
(15.5)
0.000
1
2
5
3
SIDE VIEW
0.040 (1.02)
DIA TYP
1.02
(25.91)
0.800
(20.32)
Mechanical tolerances unless otherwise noted:
X.XX dimensions: ±0.020 inches
X.XXX dimensions: ±0.005 inches
NOTES
(1)
All parameters measured at Tc = 25°C, nominal input voltage and full rated load unless otherwise noted.
Refer to the Technical Reference Section for the definition of terms, measurement circuits and other
information.
The Case is tied to the -Input 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.
(2)
(3)
(4)
Rev. 04/2000
1
0.42
(10.67)
0.3
(7.62)
0.000
DFC10 SERIES – SINGLE OUTPUT
NOTES
(1)
All parameters measured at Tc = 25°C, nominal input voltage and full rated load unless otherwise noted.
Refer to the Technical Reference Section for the definition of terms, measurement circuits and other
information.
Noise is measured per Technical Reference Section. Measurement bandwidth is 0-20 MHz for peak-peak
measurements, 10 kHz to 1 MHz for RMS measurements. Output noise is measured with a 0.01µF /
100V ceramic capacitor in parallel with a 1µf / 35V Tantalum capacitor, 1 inch from the output pins to
simulate standard PCB decoupling capacitance.
Short term stability is specified after a 30 minute warmup at full load, constant line and recording the
drift over a 24 hour period.
The input ripple rejection is specified for DC to 120 Hz ripple with a modulation amplitude of 1% of Vin.
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.
Negative Outputs
A negative output voltage may be obtained by connecting the +OUT
to circuit ground and connecting -OUT as the negative output.
(2)
(3)
(4)
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
2
DFC10 SERIES – SINGLE OUTPUT
DFC10 SERIES BLOCK DIAGRAM
ISOLATION TRANSFORMER
OUTPUT POWER DERATING
10
3
+
+ OUTPUT
8
POWER OUTPUT
+ INPUT
1
– INPUT
2
LOW
NOISE
FILTER
CURRENT
MODE
PWM
5
- OUTPUT
6
+
–
ISO AMP
4
2
SHIELDED COPPER CASE
LOW TC
BANDGAP
REFERENCE
0
50
60
70
80
90
AMBIENT TEMPERATURE
100
Typical Performance: (Tc=25°C, Vin=Nom VDC, Rated Load)
Data for 12 Volt Input Models
12 VOLT INPUT CURRENT Vs. LINE INPUT VOLTAGE
1.5
85
LINE =
9VDC
12 VOLT EFFICIENCY Vs. LOAD
12 VOLT EFFICIENCY Vs. LINE INPUT VOLTAGE
85
50% FULL LOAD
84
INPUT CURRENT (AMPS)
1.0
EFFICIENCY (%)
EFFICIENCY (%)
100% LOAD
80
83
82
81
80
100% FULL LOAD
75
LINE =
12VDC
70
LINE =
18VDC
0.5
50% LOAD
0.0
4
6
8
10
12
14
16
18
65
0
10
20
30
40
50
60
70
80
90 100
9
10
11
12
13
14
15
16
17
18
LINE INPUT (VOLTS)
LOAD (%)
LINE INPUT (VOLTS)
Data for 24 Volt Input Models
24 VOLT INPUT CURRENT Vs. LINE INPUT VOLTAGE
0.8
90
85
0.6
LINE =
18VDC
24 VOLT EFFICIENCY Vs. LOAD
24 VOLT EFFICIENCY Vs. LINE INPUT VOLTAGE
88
100% FULL LOAD
INPUT CURRENT (AMPS)
EFFICIENCY (%)
100% LOAD
80
75
70
65
0.4
50% LOAD
0.2
EFFICIENCY (%)
86
84
50% FULL LOAD
82
LINE =
24VDC
LINE =
36VDC
0
10
20
30
40
50
60
70
80
90 100
0.0
4
8
12
16
20
24
28
32
36
60
80
18
20
22
24
26
28
30
32
34
36
LINE INPUT (VOLTS)
LOAD (%)
LINE INPUT (VOLTS)
Data for 48 Volt Input Models
48 VOLT INPUT CURRENT Vs. LINE INPUT VOLTAGE
0.4
85
80
100% LOAD
0.2
50% LOAD
0.1
LINE =
36VDC
48 VOLT EFFICIENCY Vs. LOAD
48 VOLT EFFICIENCY Vs. LINE INPUT VOLTAGE
85
100% FULL LOAD
INPUT CURRENT (AMPS)
EFFICIENCY (%)
EFFICIENCY (%)
0.3
75
70
65
60
80
50% FULL LOAD
75
55 LINE =
48VDC
50
45
LINE =
72VDC
0
10
20
30
40
50
60
70
80
90 100
0.0
5
15
25
35
45
55
65
75
40
70
35
40
45
50
55
60
65
70
75
LINE INPUT (VOLTS)
LOAD (%)
LINE INPUT (VOLTS)
NUCLEAR AND MEDICAL APPLICATIONS Power-One products are not authorized for use as critical components in life support systems, equipment used in hazardous environments,
or nuclear control systems without the express written consent of the President of Power-One, Inc.
TECHNICAL REVISIONS The appearance of products, including safety agency certifications pictured on labels, may change depending on the date manufactured. Specifications are
subject to change without notice.
3
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