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DFC25 SERIES
TRIPLE OUTPUT
DESCRIPTION The DFC25 Series DC/DC converter provides three output voltages from a single 12, 24, or 48 volt nominal input for industrial and datacom equipment. Available output power ranges up to 25 watts. Excellent noise performance is attained via an aluminum case, toroidal magnetics, and double shielded transformers. Common mode and differential mode input filtering are integral to the design. Selected models provide 1544 volts isolation from input to output. The input and output sections of the DFC25 Series are protected from overvoltage transients via internal circuitry. Same voltage single output units of the DFC25 family may be connected in parallel to achieve additional output current.
Selection Chart - Up to 25 Watts Output Power
Model
DFC25E24T5/12 DFC25E24T5/15 DFC25E48T3.3/12 DFC25E48T5/12
FEATURES * Up to 25 Watts with Triple Outputs * +3.3V or +5V Main Outputs * Remote ON/OFF * Common and Differential Mode Input Filters * Main Output Trim * Efficiencies to 81% * Operation from -25C up to 85C * 700/1544V Isolation * Two Year Warranty * UL/CSA/TUV
BOTTOM VIEW SIDE VIEW 0.040 (1.02) DIA 6 PLACES 6 5
Input Range VDC Min Max
18 18 36 36 36 36 72 72
Output VDC Nominal
+5.0, 12 +5.0, 15 +3.3, 12 +5.0, 12
Output mA MAX
+5000, 1000 +5000, 800 +5000, 1000 +5000, 1000
2.50 (63.5) 2.75 (70.0) 9 8 7
3.00 (76.2)
General Specifications (1)
All Models Isolation (3) Isolation Voltage Input to Output 12V, 24V Input 48V Input 10A Leakage Input to Output Capacitance Remote ON/OFF ON Logic Level or Pin Open Off Logic Level or Tie to -Input Converter Idle Current Output Trim Function Input Resistance Programming Range Environmental Case Operating Range (2) Case Functional Range Storage Range Thermal Impedance General MTBF (Calculated) Unit Weight TYP TYP 1,000,000 2.6/71 Hours oz/gm MIN MAX MIN MAX MIN MAX TYP -25 +60 -40 +105 -45 +105 10 C C C C/Watt TYP MIN 40 10 k % MIN MAX TYP 2.5 0.7 10 Volts Volts mA Units
0.25 (6.3) 0.00 1 2 4
1.65 (42.0)
0.85 (21.6)
1.25 (31.8)
2.05 (52.1)
0.000
TYP
700
pF PIN CONNECTIONS PIN NUMBER PIN OUT 1 -INPUT 2 +INPUT 3 N/C 4 ON/OFF 5 TRIM 6 +3.3V OR +5V 7 COMMON 8 +12V OR +15V 9 -12V OR -15V
0.00
0.45 (11.4)
NOTE: All pins are 0.040" diameter brass with tin plating. Mechanical tolerances unless otherwise noted: X.XX dimensions: 0.020 inches X.XXX dimensions: 0.005 inches
NOTES (1) All parameters measured at 25C, nominal input voltage, and full rated load unless otherwise noted. (2) Derate linearly to 0 Watts at 105C ambient. Operation to +70C ambient with externally supplied forced air cooling, 100LFM. (3) Case is tied to -Input, Pin 1.
Rev. 04/2000
1
0.43 (11.0)
Volts
0.38 (9.65)
MIN MIN
700 1544
DFC25 SERIES - TRIPLE OUTPUT
Input Parameters (1)
Model Reflected Ripple (2) Input Current Full Load No Load Inrush Current (5) Efficiency Switching Frequency Maximum Input Overvoltage, 100ms Maximum Turn-on Time, 1% Output Error TYP TYP TYP MAX TYP TYP MAX TYP DFC25E24T5/12 230 1563 10 50 80 150 45 10 DFC25E24T5/15 230 1563 10 50 80 150 45 10 DFC25E48T3.3/12 150 890 10 50 78 150 85 10 DFC25E48T5/12 150 781 10 50 80 150 85 10 Units mAPP
mA APK % kHz VDC mS
Output Parameters (1)
Model Output (8) Output Voltage Output Voltage Accuracy MIN TYP MAX MIN MAX TYP TYP TYP TYP TYP TYP TYP TYP TYP DFC25EXXT3.3/XX V1 3.3 3.27 3.30 3.33 0.5 5.0 1.0 0.2 3.0 2 <0.05 <0.1 >40 75 100 DFC25EXXT5/XX V1 5 5.05 5.10 5.15 0.5 5.0 1.0 0.2 3.0 2 <0.05 <0.1 >40 75 100 DFC25EXXTX/12 V2,V3 12 11.88 12.00 12.12 0.0 1.0 8.0 3.0 8.0 2 <0.05 <0.1 >40 120 300 DFC25EXXTX/15 V2,V3 15 14.85 15.00 15.15 0.0 0.8 8.0 3.0 8.0 2 <0.05 <0.1 >40 150 300 VDC VDC Units
Rated Load Range Load Regulation 25% Load - Max Load Line Regulation Vin = Min-Max VDC Cross Regulation 25% Load - Max Load (6) Transient Response 25% Load Step (7) Short Term Stability (3) Long Term Stability Input Ripple Rejection (4) Noise, Peak - Peak (2) Temperature Coefficient Short Circuit Protection from +OUT to -OUT
A % % % % %/24Hrs %/kHrs dB mVPP ppm/C
Continuous Current Limit Protection on 3.3V or 5V outputs, Momentary Current Limit Protection on 12V or 15V outputs
DFC25 SERIES APPLICATION NOTES: External Capacitance Requirements A low ESR external capacitance is required for operation of the DFC25 Series. For maximum performance, it is recommended that the DFC25 Series uses a capacitor of sufficient ripple current capacity connected across the input pins, especially if a capacitive input source is farther than 1" from the converter. To meet the reflected ripple requirements of the converter, an input impedance of less than 0.09 Ohms at 200 kHz is required. External output capacitance is not required for operation, however it is recommended that 1F to 10F of Tantalum and 0.001 to 0.1F ceramic capacitance be selected for each output to reduce system noise. Additional output capacitance may be added for increased filtering, but should not exceed 400F. Remote ON/OFF Operation The remote ON/OFF pin may be left floating if this function is not used. It is recommended to drive this pin with TTL compatible circuitry. When the ON/OFF pin is pulled low with respect to the -INPUT, the converter is placed in a low power drain state. The input capacitors are kept fully charged in the OFF mode. For proper operation, this input may be driven from a logic gate directly. The ON/OFF pin should never be pulled more than 0.3 volts below -INPUT or have a voltage greater than +6 volts applied.
NOTES (1) All All parameters measured at Tc=25C, nominal input voltage and full rated load unless otherwise noted. (2) Measurement bandwidth is 0-20 MHz for peak-peak measurements, 10 kHz to 1 MHz for RMS measurements. Output noise is measured with a 0.01F/100V ceramic capacitor in parallel with a 1F/35V Tantalum capacitor, 1 inch from the output pins to simulate standard PCB decoupling capacitance. (3) Short term stability is specified after a 30 minute warm-up at full load, constant line and recording the drift over a 24 hour period. (4) The transient response is specified as the time required to settle from a 50 to 75% step load change (rise time of step = 2Sec) to a 1% error band. (5) Per ETSI-300-132 (6) Change to main channel output for a 25% to 100% change on dual outputs or change on dual channel outputs due to a 25% to 100% change on the main channel output. (7) Recovery to within 1% in less than 1 millisecond after transient has been applied. (8) V3 is defined as the minus, or negative output. Values in the chart are shown as positive for V2, and can be assumed negative for V3.
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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