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DFC6 SERIES
SINGLE OUTPUT
DESCRIPTION Designed for digital, ECL, and analog application, the DFC6 Series will provide up to 6 watts in an industry standard package. Ultra-wide range input voltage allows operation from battery power as well as system power. The output is electrically isolated, thereby allowing the output to be configured as a positive or negative output voltage. Fully isolated and filtered outputs permit usage in sensitive and low noise circuits. The 100KHz operating frequency of the DFC6 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. FEATURES * Ultra-Wide 3.5 to 16 Volt Input Range * Input Filtered * 6 Watts of Output Power * Efficiencies to 77% * 700V Isolation * Low Input to Output Capacitance * Ultra-Wide Input Range (4:1)
BOTTOM VIEW 2.00 (50.80) 0.300 (7.62) 0.000 0.200 (5.08) 0.500 (12.70) 0.60 (15.2) 0.60 (15.2) 0.000 1 2 4 3
SIDE VIEW .040 (1.02) DIA 4 PLACES
1.00 (25.40)
0.3 (7.62)
0.80 (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=25C, 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 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 dissipated. Reduced output power available with 3.5V input. Full power is available above 4.6V input. See input voltage derating curve for more information
(2)
(3) (4)
Rev. 04/2000
1
0.45 (11.43)
0.000
DFC6 SERIES - SINGLE OUTPUT
NOTES
(1) All parameters measured at Tc=25C, 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. (2) Reduced output power available at 3.5V input. Full output power is available above 4.6V input. See input voltage derating curve for more information. (3) 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 1F/35V Tantalum capacitor located 1" away from the converter to simulate PCB standard decoupling. (4) Short term stability is specified after a 30 minute warmup at full load, constant line and recording the drift over a 24 hour period. (5) No minimum load required for operation. Dynamic regulation may degrade when run with less than 5% load.
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. Output Power The available output power of the DFC6 Series is reduced when operating below 4.6 volts. See Input Voltage Derating curve. Below 4.6 volts the output power is linearly derated from 100% at 4.6 volts to 50% at 3.5 volts. Negative Outputs A negative output voltage may be obtained by connecting the +OUT to circuit ground and connecting -OUT as the negative output.
DFC6 SERIES APPLICATION NOTES: External Capacitance Requirements No external capacitance is required for operation of the DFC6 Series. To meet the reflected ripple requirements of the converter, an input impedance of less than 0.15 Ohms from DC to 200KHz is required. 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. External output capacitance is not
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DFC6 SERIES - SINGLE OUTPUT
DFC6 SERIES BLOCK DIAGRAM
SHIELDED ISOLATION TRANSFORMER
OUTPUT POWER DERATING 6
3 +
+ OUTPUT
5 POWER OUTPUT
4 3
+ INPUT
1 +
- INPUT
2
CURRENT MODE PWM
4
- OUTPUT
+ -
ISO AMP
2
1 0 40
NONCONDUCTIVE PLASTIC CASE
LOW TC BANDGAP REFERENCE
50 60 70 80 AMBIENT TEMPERATURE
90
Typical Performance: (Tc=25C, Vin=Nom VDC, Rated Load)
EFFICIENCY Vs. LOAD
80 LINE = 5VDC 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 50% LOAD 0 10 20 30 40 50 60 70 80 90 100 0.0 0 2 4 6 8 10 12 14 16 100% LOAD
INPUT CURRENT Vs. INPUT VOLTAGE OUTPUT IMPEDENCE (OHMS)
10
OUTPUT IMPEDENCE Vs. FREQUENCY
INPUT CURRENT (AMPS)
EFFICIENCY (%)
75
12/15 VOLT OUTPUT 1
70
.1 5 VOLT OUTPUT .01 10
65
LINE = 16VDC
60
100
1000
10000
100000
1000000
LOAD (%)
LINE INPUT (VOLTS)
FREQUENCY (Hz)
EFFICIENCY Vs. LINE INPUT VOLTAGE RMS INPUT CURRENT (AMPS)
85 1.0 0.8
RMS INPUT CURRENT Vs. LINE INPUT
100% LOAD 120
INPUT VOLTAGE DERATING
EFFICIENCY (%)
80 50% FULL LOAD 75 100% FULL LOAD 70
75% LOAD 0.6 50% LOAD 0.4 0.2 0.0 3 5 7 9 11 13 15 17
% AVAILABLE POWER
100 80 60 40 20 0 3.50
65 4 6 8 10 12 14 16
3.75
4.00
4.25
4.50
4.75
5.00
LINE INPUT (VOLTS)
LINE INPUT (VDC)
LINE INPUT (VDC)
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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.
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