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