• 20 WATTS MAXIMUM OUTPUT POWER • 2:1 WIDE INPUT VOLTAGE RANGE • INTERNATIONAL SAFETY STANDARD APPROVAL • SIX-SIDED CONTINUOUS SHIELD • HIGH EFFICIENCY UP TO 88% • SMD TYPE 1.95” X 1.19” X 0.38” PACKAGE • FIXED SWITCHING FREQUENCY • PATENT The SDC20 series offer 20 watts of output power from a 1.95 x 1.19 x 0.38 inch SMD type package. The SDC20 series with 2:1 wide input voltage of 36-75VDC and features 1600VDC of isolation, short-circuit and over-voltage protection, as well as six sided shielding. All models are particularly suited to telecommunications, industrial, mobile telecom and test equipment applications. CE MARK T E C H N I C A L S P E C I F I C AT I O N All specifications are typical at nominal input, full load and 25ºC otherwise noted GENERAL SPECIFICATIONS OUTPUT SPECIFICATIONS Output power Voltage accuracy 20 Watts, max. Full load and nominal Vin ± 1% Voltage adjustability ± 10% Minimum load Line regulation 0% LL to HL at Full Load ± 0.2% Efficiency See table Isolation voltage 1600VDC, min. Isolation resistance 10 ohms, min. 9 Isolation capacitance 500pF, max. Switching frequency 300KHz, typ. Design meet standard ± 0.5% Load regulation 10% to 100% FL Ripple and noise 20MHz bandwidth (Measured with 0.1uF/50V MLCC) See table ±0.02% / ºC, max. Temperature coefficient Transient response recovery time 25% load step change Over voltage Zener diode clamp 2.0V output 3.3V output 5V output 12V output 15V output Over load protection % of FL at nominal input Short circuit protection 300uS 3.9VDC 3.9VDC 6.2VDC 15VDC 18VDC 150%, max. Hiccup, automatics recovery INPUT SPECIFICATIONS Input voltage range 48V nominal input Input voltage lockout DC-DC ON DC-DC OFF Input filter Input surge voltage 100mS max Input reflected ripple 36 – 75VDC 36VDC 33VDC L-C type IEC60950, UL1950, EN60950 Potting material Epoxy (UL94-V0) 1.95 X 1.19 X 0.38 Inch (49.5 X 30.2 X 9.7 mm) Dimensions Weight 32.5g (1.15oz) MTBF (Note 3) 1.632 x 10 hrs 6 ENVIRONMENTAL SPECIFICATIONS Operating ambient temperature -40ºC ~ +85ºC (with derating) Maximum case temperature +100ºC Storage temperature range Thermal impedance -55ºC ~ +105ºC Nature convection 14ºC/Watt Thermal shock MIL-STD-810F Vibration MIL-STD-810F Relative humidity 5% to 95% RH EMC CHARACTERISTICS (Note 4) Conducted emissions EN55022 Class A 48V input 100VDC Radiated emissions EN55022 Class A Nominal Vin and full load 25mAp-p ESD EN61000-4-2 Perf. Criteria B Radiated immunity EN61000-4-3 Perf. Criteria A Fast transient EN61000-4-4 Perf. Criteria B Surge EN61000-4-5 Perf. Criteria B Conducted immunity EN61000-4-6 Perf. Criteria A Start up time Nominal Vin and Power up 25mS, typ. (Note 1) constant resistive load Remote ON/OFF 25mS, typ. Remote ON/OFF (Note 2) DC-DC ON Open or 3.5V < Vr < 12V DC-DC OFF Short or 0V < Vr < 1.2V Remote off input current Nominal Vin 2.5mA Page 1 of 3 Issued Date：2008/05/21 Model Number Input Range Output Voltage Output Current RIPPLE & NOISE (5) Input Current (6) Eff (7) (%) Capacitor(8) Load max SDC20-48S2P0 SDC20-48S3P3 SDC20-48S05 SDC20-48S12 SDC20-48S15 36 – 75 VDC 36 – 75 VDC 36 – 75 VDC 36 – 75 VDC 36 – 75 VDC 2.0 VDC 3.3 VDC 5.0 VDC 12.0 VDC 15.0 VDC 4000mA 4000mA 4000mA 1670mA 1330mA 50mV 50mV 75mV 75mV 75mV 214mA 344mA 490mA 497mA 495mA 82 84 89 88 88 17000uF 10300uF 6800uF 1200uF 750uF Note 0.382 (9.7) 12 0.06(1.52) 1.95(49.5) 7 0.01(0.25) 0.07(1.8) 0.068(1.75) TOP VIEW 1.88(47.8) 1 6 1. All dimensions in Inches (mm) Tolerance: X.XX±0.02 (X.X±0.5) 2. Pin pitch tolerance ±0.014(0.35) 0.55(14.0) 0.12(3.2) 1.45(36.8) BOTTOM VIEW 12 0.11(2.8) DIA 0.05(1.27) X2 0.787(20.0) 0.13(3.3) 1.39(35.3) 1 0.10(2.54) 0.32(8.2) 0.80(20.3) 0.52(13.3) 0.063(1.6) Dip Hole Required for guide 2 place. 1.20(30.5) 1.32(33.6) 1.60(40.6) 1.52(38.7) 1.81(46.0) 1.72(43.8) SDC20-48S05 Derating Curve DIP PIN CONNECTION PIN DEFINE PIN DEFINE 1 2 3 4 5 6 + OUTPUT - OUTPUT NC TRIM NC NC 12 11 10 9 8 7 + INPUT - INPUT NC SYNC ON-OFF CTRL NC OUTPUT POWER (%) 5 6 7 8 1.19(30.2) 2 3 4 Please add an external filter at converter input terminals when measuring input reflected ripple, as figure 1. L: Simulated source impedance of 12μH C: Nippon chemi-con KMF series, 220μF/100V. The ON/OFF control pin voltage is referenced to –Vin BELLCORE TR-NWT-000332. Case I: 50%. Stress, Temperature at 40ºC. (Ground fixed and controlled environment) An external filter capacitor is required for EMC testing. The capacitor should be capable of handing 1A ripple current for 48V models. Power mate suggest: Nippon chemi-con KMF series, 220μF/100V, ESR 90mΩ. Test condition: nominal input and full load. Maximum value at nominal input voltage and full load. Typical value at nominal input voltage and full load. Test by minimum Vin and constant resistive load. 0.47 (12.1) 1 100 75 50 Nature convection 25 0 -40 -25 -10 0 50 60 70 80 90 100 AMBIENT TEMPERATURE (ºC) Page 2 of 3 Issued Date：2008/05/21 Converter 2 + + Vin 4 3 - Vin Sync - Application of synchronization 1. The unit is capable of external synchronization from an independent time base with a switching rate between 330KHz and 360KHz 2. The amplitude of the synchronizing pulse train is TTL compatible 3. The duty cycle of the CLK should be 20% high and 80% low 4. Synchronization is referenced to negative input (-Vin) Converter 2 + 4 3 CLK CLK Signal 80% Sync - ON/OFF Control applicati Converter 2 + + Vin 1 2N7000 3 - Vin CTR - ON/OFF Control 20% Page 3 of 3 Issued Date：2008/05/21