ISOLATED DC/DC CONVERTERS 48 Vdc Input 3.3 Vdc /12 A Output VRYB-40T03x • • • • • • RoHS Compliant • • • • • • Isolated High Efficiency High Power Density Fixed Frequency (400 kHz) Low Cost Input Under-Voltage Lockout Rev.A Output Over-Voltage Shutdown OCP/SCP Over Temperature Protection Remote On/Off Output Voltage Trim Positive/Negative Remote Sense Description The VRYB-40T03x is isolated dc/dc converter that operates from a nominal 48 Vdc source. This unit will provide up to 40 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 and under-voltage lockout. This converter is provided in an industry SIP package. Part Selection Output Voltage Input Voltage Max. Output Current Max. Output Power Typical Efficiency Model Number Active High Model Number Active Low 3.3 Vdc 36 Vdc - 75 Vdc 12 A 40 W 89% VRYB-40T033 VRYB-40T03L 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 Parameter Input Voltage (continuous) Remote On/Off I/O Isolation Voltage Ambient Temperature Storage Temperature Min Typ Max -0.3 V -0.3 V -40 °C -55 °C - 80 V 18 V 1500 V 85 °C 125 °C Notes Input Specifications Parameter Min 36 V Typ 48 V Max 75 V Input Current (full load) - - 1.5 A Input Current (no load) - 40 mA 60 mA Remote Off Input Current - 8 mA 15 mA Input Reflected Ripple Current (rms) - 4 mA 8 mA Input Reflected Ripple Current (pk-pk) - 25 mA 50 mA - 0.01 A s 0.02 A s Input Voltage 2 I t Inrush Current Transient 2 Notes Tested with simulated source impedance of 10 uH, 5 Hz to 20 MHz; use a 100 uF/100 V electrolytic capacitor with ESR = 1 ohm max. at 200 kHz at 25 °C. 2 Turn-on Voltage Threshold 32 V 34 V 35 V Turn-off Voltage Threshold 30 V 32 V 33 V 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 3.3 Vdc /12 A Output Output Specifications Parameter Output Voltage Set Point Min 3.250 V Typ 3.300 V Max 3.350 V Output Voltage Regulation (Load) - ±6 mV ±12 mV Output Voltage Regulation (Line) - ±2 mV ±5 mV Regulation Over Temperature (-40 deg.C - 85 deg.C) - ±20 mV ±40 mV Output Current 0A - 12 A Current Limit Threshold 14 A 18 A 21 A Ripple and Noise (pk-pk) - 40 mV 80 mV Ripple and Noise (rms) - 7 mV 15 mV Short Circuit Surge Transient - 3A s 5A s Turn on Time - - 40 mS Overshoot at Turn On - 0% 5% 220 uF - 10000 uF 25% - 50% Max Load 120 mV 160 mV Settling Time 100 uS 150 uS - 120 mV 160 mV - 100 uS 150 uS Output Capacitance 2 Notes Vin=48 V, Io=50%Load 0-20 MHz BW, with a 1 uF ceramic capacitor and a 220 uF tantalum capacitor at the output. 2 Transient Response 50% - 25% Max Load Vo=3.3 V Settling Time di/dt=0.1 A/us, Vin=48 Vdc, Ta=25°C, with a 1 µF ceramic capacitor and a 220 uF Tantalum capacitor at the output. Note: All specifications are typical at 25 °C unless otherwise stated. General Specifications Parameter Min 86% Typ 89% Max - Switching Frequency 360 kHz 400 kHz 440 kHz Isolation capacitance - 1000 pF - Output Voltage Trim Range - 80% 110% Remote Sense Compensation - - 10% - 125 °C - 115% 140% - Efficiency Over Temperature Protection Over Voltage Protection MTBF Notes Vin=48 V, full load The total voltage increased by trim and remote sense should not exceed 10%Vo. Calculated Per Bell Core SR-332 (Vin=48 V, Vo=3.3 V, Io=9.6 A, Ta = 25 °C) TBD Dimensions Inches (L × W × H) Millimeters (L × W × H) Weight 2.0 x 0.5 x 0.348 50.80 x 12.70 x 8.84 - 10.5 g - 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 3.3 Vdc /12 A Output Control Specifications Parameter Remote On/Off Signal Low (Unit On) Signal High (Unit Off) Signal Low (Unit Off) Signal High (Unit On) Active Low Active High Min Typ Max -0.3 V - 0.8 V Notes VRYB-40T03L. The remote on/off pin open, Unit off. 2.4 V - 18 V -0.3 V - 0.8 V 2.4 V - 18 V 0 mA - 0.75 mA Current Sink VRYB-40T033. The remote on/off pin open, Unit on. Output Trim Equations Equations for calculating the trim resistor are shown below. The Trim Down resistor should be connected between the Trim pin and GND pin. The Trim Up resistor should be connected between the Trim pin and the Vout pin. Only one of the resistors should be used for any given application. 511 Rtrimdown = − 10.22[kΩ] delta Vout Module Trim GND Rtrimup = (100 + delta) ⋅ Vo ⋅ 5.11 − 626 − 10.22[kΩ] 1.225 ⋅ delta Note: (Vo _ req − Vo ) × 100 [% ] delta = Rtrimdown Vout Module Trim Rtrimup GND Vo Vo_req=Desired (trimmed) output voltage [V] Output voltage Vo=3.308 V 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 3.3 Vdc /12 A Output Efficiency Data EFFICIENCY CURVE 90% 86% EFFICIENCY 82% 36V 48V 75V 78% 74% 70% 66% 62% 58% 54% 50% 2.00 4.00 6.00 8.00 10.00 12.00 OUTPUT CURRENT (A) VRYB-40T03x Thermal Derating Curve VRYB-40T03x 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 3.3 Vdc /12 A Output Transient Response Waveforms Vout=3.3 V 50% to 25% Load Transients Vout=3.3 V 25% to 50% Load Transients Note: Transient Response at Vin=48 V, di/dt=0.1 A/uS, with external 220 uF tantalum capacitor and 1 uF ceramic capacitor at the output, Ta=25 deg C. Ripple and Noise Waveform . Note: Ripple and noise at full load, 48 Vdc input, 3.3 Vdc/12 A output and Ta=25 deg C, and with a 1uF ceramic capacitor and a 220 uF tantalum capacitor at the output. 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 3.3 Vdc /12 A Output Mechanical Outline Pin Connections Pin Function 1 Vin(+) 2 On/Off 3 Vin(-) 4 Sense(-) 5 Vout(-) 6 Vout(-) 7 Trim 8 Vout(+) 9 Vout(+) 10 Sense(+ ) RoHS Compliance Complies with the European Directive 2002/95/EC, calling for the elimination of lead and other hazardous substances from electronic products. ©2007 Bel Fuse Inc. Specifications subject to change without notice. 081007 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