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| DFC15 SERIES SINGLE OUTPUT DESCRIPTION The DFC15 Series of DC/DC converters are designed to provide a wide range of PCB power solutions. The converter features dual output filters for low noise. Trim and remote ON/OFF features give flexibility to designs. The output of the converter is electrically isolated, thereby allowing the output to be configured as a positive or negative output voltage. The ultra-wide input range, from 20 to 60 volts, allows use in many industrial and communication applications. Selection Chart Model DFC15U48S5 DFC15U48S12 DFC15U48S15 Input Range VDC Min 20 20 20 Max 60 60 60 Output VDC 5 12 15 Output mA 3000 1250 1000 BOTTOM VIEW 2.02 (51.31) SIDE VIEW 0.040 (1.02) DIA 6 PLACES FEATURES * Up to 15 Watts Output Power * Efficiencies to 83% * Very Low OFF Current * 700V Isolation * Dual Stage Output filter * -40C to +90C Operation * Ultra-Wide Range Input (3:1) * Remote ON/OFF and TRIM General Specifications (1) All Models ON/OFF Function (2) OFF Logic Level or Pin Open OFF Logic Level Input Resistance Converter Idle Current ON/OFF Pin Low Isolation (3) Isolation Voltage Input to Output 10 A Leakage Input to Output Capacitance Output Trim Function Input Resistance Open Circuit Voltage Environmental Case Operating Range, Tc No Derating Storage Range Thermal Impedance (5) General MTBF (Calculated) Unit Weight Chassis Mounting Kit 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 ON/OFF pin is the Open Collector TTL, CMOS, and relay compatible. The input to this pin is referenced to Pin 2 (-Input) and is protected to +75VDC. The Case is tied to Pin 3, +Input pin. The case thermal impedance is specified as the case temperature rise over ambient per package watt dissipated. Units MIN MAX TYP TYP 8.0 2.0 100 <1 VDC VDC Kohms mA 0.700 (17.78) 0.600 (15.24) 0.400 (10.16) 0.300 (7.62) 0.000 0.100 (2.54) 0.31 (7.9) 0.11 (2.8) 0.000 5 1 2 6 1.62 (41.15) 3 7 0.3 (7.62) 1.800 (45.72) MIN TYP 70 0 300 VDC pF Mechanical tolerances unless otherwise noted: X.XX dimensions: 0.020 inches X.XXX dimensions: 0.005 inches TYP MIN MIN MAX MIN MAX TYP TYP TYP 20 5 -40 90 -55 105 10 800,000 2/57 CM2A1 Kohms % C C C/Watt HRS oz/gm Pin 1 2 3 4 5 6 7 Function +INPUT -INPUT ON/OFF NO PIN +OUT -OUT TRIM For the Most Up-To-Date Information www.power-one.com 24 Hours/Day--7 Days/Week (2) (3) (4) Rev. 04/2000 1 0.55 (13.97) 0.000 DFC15 SERIES - SINGLE OUTPUT Input Parameters (1) Model Voltage Range Input Current Full Load No Load MIN TYP MAX TYP TYP TYP TYP MAX TYP 5 DFC15U48S5 DFC15U48S12 20.0 48.0 60.0 915 4 82 120 75 10 DFC15U48S15 Units VDC 905 4 83 mA % kHz VDC ms Efficiency Switching Frequency Maximum Input Overvoltage, 100ms No Damage Turn-on Time, 1% Output Error 950 2 79 Output Parameters (1) Model Output Voltage Rated Load (3) Voltage Range 100% Load Load Regulation 25-100% Full Load Line Regulation Vin = Min-Max VDC Short Term Stability (4) Long Term Stability Input Ripple Rejection (5) Noise, 0-20MHz bw (2) RMS Noise Temperature Coefficient Short Circuit Protection +OUT to -OUT 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. Noise is measured per Technical Reference Section. Measurement bandwidth is 0-20 MHz. RMS noise is measured over a 0.01-1 MHz bandwidth. To simulate standard PCB decoupling practices, output noise is measured with a 1F/35V tantalum capacitor located 1 inch away from the converter. Minimum load required for rated regulation only. Dynamic response may degrade if run at less than 25% full load. Short term stability is specified after a 30 minute warm-up at full load, and with constant line, load and ambient conditions. The input ripple rejection is specified for DC to 120Hz ripple with a modulation amplitude of 1% Vin. DFC15U48S5 MIN MAX MIN TYP MAX TYP MAX TYP MAX TYP TYP TYP TYP TYP TYP MAX 75 3 5 0 3000 4.95 5.00 5.05 0.5 0.75 0.1 0.15 DFC15U48S12 12 0 1250 11.90 12.00 12.10 0.1 0.2 0.01 0.1 < 0.02 < 0.05 > 60 60 2 50 150 Continuous Current Limit DFC15U48S15 15 0 1000 14.90 15.00 15.10 0.1 0.2 0.01 0.1 Units VDC mA VDC % % %/24Hrs %/kHrs dB 60 2 mVPP mVrms ppm/C DFC15 SERIES APPLICATION NOTES: External Capacitance Requirements No external capacitance is required for operation of the DFC15 Series. However, for maximum performance, it is recommended that the DFC15 Series use a capacitor of sufficient ripple current capacity connected across the input pins 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 0.05 Ohms from DC to 200KHz is required. 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. (continued) 2 (2) (3) (4) (5) DFC15 SERIES - SINGLE OUTPUT DFC15 SERIES BLOCK DIAGRAM SHIELDED ISOLATION TRANSFORMER OUTPUT POWER DERATING 15 5 + + + OUTPUT POWER OUTPUT 10 + INPUT 1 - INPUT 2 CURRENT MODE PWM 6 - OUTPUT + ON/OFF 7 TRIM 5 3 ISOLATED FEEDBACK - FIVE SIDED SHIELDED COPPER CASE LOW TC BANDGAP REFERENCE 0 40 60 70 80 50 AMBIENT TEMPERATURE 90 APPLICATION NOTES (cont'd): 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 an open collector arrangement or a relay contact. When the ON/OFF pin is pulled low with respect to the -INPUT, the converter is placed in a low power drain state. Do not drive this input from a logic gate directly; there is a 100K internal pull-up resistor to a 9 volt source. Output TRIM The TRIM pin may be used to adjust the output 5% from the nominal setting. This function allows adjustment for voltage drops in the system wiring, as well 5.2 volt outputs for ECL applications. Figure 1 shows the proper connections to use this function. A trimpot value of 10K should be used for 5 volt outputs. A trimpot value of 20K should be used for 12 and 15 volt outputs. If the TRIM function is not required the pin may be left floating. +OUT 5 TRIM 7 -OUT 6 USING TRIMPOT 10K LOAD +OUT 5 TRIM DOWN TRIM 7 -OUT 6 Typical Performance: (Tc=25C, Vin=Nom VDC, Rated Load) EFFICIENCY Vs. LINE INPUT VOLTAGE 85 50% FULL LOAD 85 90 LINE = 20VDC EFFICIENCY Vs. LOAD EFFICIENCY (%) EFFICIENCY (%) 82 100% FULL LOAD 80 80 75 70 65 LINE = 48VDC 77 75 20 60 25 30 35 40 45 50 55 60 0 LINE = 60VDC 10 20 30 40 50 60 70 80 90 100 LINE INPUT (VOLTS) LOAD (%) INPUT RIPPLE Vs. LINE INPUT REFLECTED RMS RIPPLE (AMPS) 1.00 1.2 INPUT CURRENT Vs. INPUT VOLTAGE INPUT CURRENT (AMPS) 100% FULL LOAD 0.80 75% FULL LOAD 0.60 50% FULL LOAD 0.40 1.0 0.8 0.6 100% LOAD 0.4 0.2 50% LOAD 0.0 0 10 20 30 40 50 60 0.20 20 25 30 35 40 45 50 55 60 LINE INPUT (VOLTS) LINE INPUT (VOLTS) OUTPUT VOLTAGE Vs. OUTPUT LOAD 120 OUTPUT VOLTAGE (%) 100 80 60 40 20 0 0 20 40 60 80 100 120 140 160 180 LOAD TRIM UP Figure 1. USING FIXED RESISTORS OUTPUT LOAD (%) 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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