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| DFC25 SERIES SINGLE OUTPUT DESCRIPTION The DFC25 Series DC/DC converter provides tightly regulated output voltages for industrial and datacom applications from 12, 24, or 48 Volt inputs. Available output power ranges from 24.75 to 30 watts. Excellent noise performance is attained via an aluminum case, toroidal magnetics, and double shielded transformers. Common mode and differential mode input filtering is integral to the design. Selected models provide 1544 volts isolation from the input to output. The input and output sections of the DFC25 Series are protected from overvoltage transients via internal circuitry. Same voltage models of the DFC25 family may be connected in parallel to achieve additional output current. Selection Chart Model DFC25E12S3.3 DFC25E24S5 DFC25E48S5 DFC25E48S12 FEATURES * Up to 30 Watts Output Power * Remote ON/OFF * Common and Differential Mode Input Filters * +3.3, +5V, or +12V Outputs * Remote Voltage Sense * Efficiencies to 81% * Operation from -25C 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 9 18 36 36 18 36 72 72 Output VDC Nominal 3.3 5 5 12 Output mA MAX 7500 6000 6000 2500 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 PIN CONNECTIONS PIN NUMBER PIN OUT 1 -INPUT 2 +INPUT 3 N/C 4 ON/OFF 5 TRIM 6 +OUTPUT 7 -OUTPUT 8 N/C 9 N/C 0.25 (6.3) 0.00 1 Units 2 4 MIN MIN TYP 700 1544 700 Volts 1.65 (42.0) 0.85 (21.6) 1.25 (31.8) 0.38 (9.65) 2.05 (52.1) 0.000 pF 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) DFC25 SERIES - SINGLE OUTPUT Input Parameters (1) Model Reflected Ripple (2) Input Current Full Load No Load Inrush Current (4) Efficiency Switching Frequency Maximum Input Overvoltage, 100ms Maximum Turn-on Time, 1% Output Error TYP TYP TYP MAX TYP TYP MAX TYP DFC25E12S3.3 330 2870 100 50 72 150 24 10 DFC25E24S5 230 1563 10 50 80 150 45 10 DFC25E48S5 150 781 10 50 80 150 85 10 DFC25E48S12 150 762 10 50 82 150 85 10 Units mAPP mA APK % kHz VDC ms Output Parameters (1) Model Output Voltage Output Voltage Accuracy MIN TYP MAX MIN MAX TYP TYP TYP TYP TYP TYP TYP TYP DFC25E12S3.3 3.3 3.26 3.30 3.33 0.75 7.50 1 0.2 2 <0.05 <0.1 >40 75 100 DFC25E24S5 5 5.05 5.10 5.15 0.60 6.00 1 0.2 2 <0.05 <0.1 >40 75 100 DFC25E48S5 5 5.05 5.10 5.15 0.60 6.00 1 0.2 2 <0.05 <0.1 >40 75 100 DFC25E48S12 12 11.90 12.00 12.10 0.25 2.50 1 0.2 2 <0.05 <0.1 >40 75 100 Units VDC VDC A % % % %/24Hrs %/kHrs dB mVPP ppm/C Rated Load Range Load Regulation 10% Load - Max Load Line Regulation Vin = Min-Max VDC Transient Response 25% Load Step (5) Short Term Stability (3) Long Term Stability Input Ripple Rejection Noise, Peak - Peak (2) Temperature Coefficient Short Circuit Protection from +OUT to -OUT Continuous, Current Limit Protection 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 use 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 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 he drift over a 24 hour period. (4) Per ETSI-300-132 (5) Recovery to within 1% in less than 1 millisecond after transient has been applied. 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. 2 |
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