ISOLATED DC/DC CONVERTERS 48 Vdc Input 28 Vdc /18 A Output 0RFB-F0T280 RoHS Compliant Rev.E Isolated Output Over-Voltage Latch Off Fixed Frequency (300 kHz) SCP/OCP Hiccup Mode High Efficiency Isolation Remote On/Off High Power Density Auxiliary Bias Power Over Temperature Protection Lockout Inverter Operation Good (Power Good) Low Cost Input Over-Voltage Lockout Heatsink for Extended Operation (Option) Input Under-Voltage Lockout Basic Isolation Parallel Operation Using Forced Current Sharing (Option) Description The 0RFB-F0T280 is an isolated dc/dc converter that operates from a nominal 48 Vdc source. These units will provide up to 504 W of output power from a nominal 48 Vdc input. This unit is designed to be highly efficient and low cost. Features include remote on/off, over current protection, input under-voltage and over-voltage lockout. This converter is provided in an industry standard full brick package. Part Selection Output Voltage Input Voltage Max. Output Current Max. Output Power Typical Efficiency Model Number 28 Vdc 48 Vdc 18 A 504 W 91% 0RFB-F0T280 Notes: 1. Add “G” suffix at the end of the model number to indicate Tray Packaging. 2. All part numbers above indicate RoHS 6. Change the second letter "R" to "7" for RoHS 5 part numbers. Absolute Maximum Ratings Min Typ Max Input Voltage Parameter -0.3 V - 80 V Remote On/Off -10 mA - 5 mA - - 1500 V Ambient Temperature -40 C - 100 C Storage Temperature -55 C - 125 C I/O isolation voltage Notes It's the temperature of baseplate. Note: All specifications are typical at 25 C unless otherwise stated. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com ISOLATED DC/DC CONVERTERS 48 Vdc Input 28 Vdc /18 A Output Input Specifications Parameter Input Voltage Min 36 V Typ 48 V Max 76 V Input Current (no load) - 60 mA 100 mA Input Current (full load) - - 16.2 A Remote Off Input Current - 25 mA 40 mA Input Reflected Ripple Current (pk-pk) - 30 mA - Input Reflected Ripple Current (rms) - 10 mA - I t Inrush Current Transient - - 1A s Turn-on Voltage Threshold 33 V 34.5 V 35.5 V Turn-off Voltage Threshold 31 V 32 V 34 V Input Over Voltage Lockout 76 V 78 V 80 V 2 Notes With simulated source impedance of 15 uH, 5 Hz to 20 MHz; use 2* 220 uF/100 V electrolytic capacitor with ESR = 1 ohm max at 200 kHz 2 Notes: 1. Should place at least 2*220uF/100V electrolytic capacitor directly adjacent to the input pin of the module. 2. All specifications are typical at nominal input, full load at 25 C unless otherwise stated Output Specifications Parameter Min Typ Max 27.72 V 28.00 V 28.28 V Load Regulation - - 100 mV Line Regulation Regulation Over Temperature (-40deg.C-85deg.C) Output Current Range - - 56 mV - - 300 mV Output Voltage Set Point 0A - 18 A 16.8 V - 32.2 V Output DC Current Limit 19 A 21.5 A 24 A Ripple and Noise (rms) - - 100 mV Ripple and Noise (pk-pk) - - 310 mV 90 mS 120 mS 150 mS - 0% 2% 220 uF - 5000 uF Output Voltage Trim Range Turn on Time Overshoot at Turn on Output Capacitance Notes Vin=48 V, full load. Should short Vout(+) to Sense(+) and Vout(-) to Sense(-) Pin. Over all load, line and temperature conditions with a 1µF ceramic capacitor and 220uF low ESR aluminum capacitor output. Transient Response 50% ~ 75% Max Load 75% ~ 50% Max Load Overshoot - 800 mV 1200 mV - 500 uS 800 uS Overshoot - 800 mV 1200 mV Settling Time - 500 uS 800 uS Settling Time VO=28 V di/dt=0.1A/us, Vin=48 Vdc, with a 1 µF ceramic capacitor and a 220 uF low ESR aluminum load capacitor at output, Ta=25 °C. Note: All specifications are typical at nominal input, full load at 25 C unless otherwise stated. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com ISOLATED DC/DC CONVERTERS 48 Vdc Input 28 Vdc /18 A Output General Specifications Parameter Efficiency Switching Frequency Isolation Capacitance Min Typ Max 88% 91% - - 300 kHz - Notes Vin=48 V, full load - 1500 pF - 10 M Ohm - - Input to Output - - 1500 V Input to Case - - 1500 V - - 500 V 7V - 10 V - - 35 V Isolation Resistance Output to Case Auxiliary Output Voltage 1 IOG Pin Max Applied Voltage 2 Remote Sense compensation -2 V Over Temperature Protection - 110 ℃ 125 ℃ 33 V - 35.8 V Over Voltage Protection 3 2V MTBF Calculated Per Bell Core SR-332 (Vin=48 V, Io=normal , Ta = 25 C) TBD Dimensions Inches millimeters Weight 4.60 x 2.40 x 0.50 116.8 x 61.0 x 12.70 - 150 g - Notes: 1. Aux pin source current <=20 mA, ground for the AUX terminal is -S terminal. 2. The signal is low when inverter is normally operating and HIGH when inverter stops or operating abnormally, maximum sink current is 5 mA. 3. The Over Voltage Protection point is the steady point and the Trim can not connect to +sense directly. When doing OVP Test, suggest connect a resistance larger than 100K Ohm between them. 4. All specifications are typical at 25 C unless otherwise stated. Control Specifications Parameter Min Typ Max 1 mA - 5 mA -10 mA - 0 mA Notes Remote On/Off The Converter ON The Converter Off Isink Note: +ON/OFF, -ON/OFF terminal, Isolation withstand voltage to input or output or baseplate: 500 Vdc. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com ISOLATED DC/DC CONVERTERS 48 Vdc Input 28 Vdc /18 A Output Output Trim Equations 1. Equations for calculating the trim resistor are shown below. The Trim Down resistor should be connected between the Trim pin and Sense(-) pin. The Trim Up resistor should be connected between the Trim pin and the Sense(+) pin. Only one of the resistors should be used for any given application. Sense(+) 600 Rtrimdown 6 k delta Module Trim Rtrimdown Sense(-) (100 delta) Vo 6 600 Rtrimup 6 k delta Sense(+) Rtrimup Module Trim Sense(-) Notes: delta Vo _ req Vo 100 % Vo Vo_req=Desired(trimmed) output voltage[V], Output voltage Vo=28 V 2. Output Voltage Adjustement by applying external voltage. Vout=Trim Terminal Voltage X Nominal Output Volgage. Efficiency Data EFFICIENCY 95.0% 90.0% 36 V 48 V 76 V 85.0% 80.0% 75.0% 70.0% 1.80 4.50 9.00 13.50 18.0 OUTPUT CURRENT(A) Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com ISOLATED DC/DC CONVERTERS 48 Vdc Input 28 Vdc /18 A Output Thermal Derating Curves Vin=36 V Vin=48 V Vin=76 V Notes: 1. All with maximum temperature of baseplate derated to 100℃ 2. Custom need to add extended heatsink to keep the baseplate temperature. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com ISOLATED DC/DC CONVERTERS 48 Vdc Input 28 Vdc /18 A Output Ripple and Noise Waveforms 36 Vdc input, 28 Vdc/18 A output 48 Vdc input, 28 Vdc/18 A output 76 Vdc input, 28 Vdc/18 A output Note: Ripple and noise at full load, with a 220 uF low ESR aluminum capacitor at output, and Ta=25 deg C. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com ISOLATED DC/DC CONVERTERS 48 Vdc Input 28 Vdc /18 A Output Transient Response Waveforms Vout=28 V, 50% to 75% Load Transients Vout=28 V, 75% to 50% Load Transients Note: Transient Response at di/dt=0.1 A/us, Vin=48 Vdc, Ta=25°C, with a 1 µF ceramic capacitor and 220 µF low ESR aluminum capacitor at output. Mechanical Outline Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com ISOLATED DC/DC CONVERTERS 48 Vdc Input 28 Vdc /18 A Output Mechanical Outline (continued) Pin Connections Pin Function Pin Size 1 Vin(-) 0.079’’ 2 Vin(+) 0.079’’ 3 On/Off(-) 0.039’’ 4 On/Off(+) 0.039’’ 5 Vout(+) 0.079’’ 6 Vout(+) 0.079’’ 7 Vout(+) 0.079’’ 8 Vout(-) 0.079’’ 9 Vout(-) 0.079’’ 10 Vout(-) 0.079’’ 11 SENSE(-) 0.039’’ 12 SENSE(+) 0.039’’ 13 TRIM 0.039’’ 14 PC 0.039’’ 15 IOG 0.039’’ 16 AUX 0.039’’ RoHS Compliance Complies with the European Directive 2002/95/EC, calling for the elimination of lead and other hazardous substances from electronic products. 2009 Bel Fuse Inc. Specifications subject to change without notice. 032509 CORPORATE FAR EAST EUROPE Bel Fuse Inc. 206 Van Vorst Street Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com Bel Fuse Ltd. 8F/ 8 Luk Hop Street San Po Kong Kowloon, Hong Kong Tel 852-2328-5515 Fax 852-2352-3706 www.belfuse.com Bel Fuse Europe Ltd. Preston Technology Management Centre Marsh Lane, Suite G7, Preston Lancashire, PR1 8UD, U.K. Tel 44-1772-556601 Fax 44-1772-888366 www.belfuse.com