ISOLATED DC/DC CONVERTERS 24 Vdc Input 8 Vdc / 5 A Output xRSB-50R08x • 1/16 Brick RoHS Compliant • Isolated Rev.A Input Under Voltage Lockout • Fixed Frequency (600 kHz) • Output Over Voltage Shutdown • High Efficiency • OCP/SCP • High Power Density • Over Temperature Protection • Low Cost • Remote On/Off (option) • Output Voltage Trim • Positive/Negative Remote Sense • Basic Insulation • Through Hole and SMT (option) Description The xRSB-50R08x series are isolated dc/dc converters that operate from a nominal 24 Vdc source. These units will provide up to 40 W of output power from a nominal 24 Vdc input. These units are designed to be highly efficient and low cost. Features include remote on/off, over current protection and under voltage lockout. These converters are provided in an industry standard sixteenth brick package. Part Selection Output Voltage 8V Input Voltage 18 V - 36 V Max. Output Current 5A Max. Output Power 40 W Typical Efficiency 90% Model Number Active Low xRSB-50R08L Model Number Active High xRSB-50R080 Notes: 1. Add “G” suffix at the end of the model number to indicate Tray Packaging. Replace”x” with “S” to indicate SMT package, or “0” to indicate through hole package. 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 -0.3 V -0.3 V - Typ - -40 °C -55 °C Max 40 V 18 V 1500 V Notes 85 °C 125 °C Input Specifications Parameter Input Voltage Input Current (full load) Input Current (no load) Remote Off Input Current Min 18 V - Typ 24 V 80 mA 1 mA Max 36 V 3.5 A 160 mA 3 mA Input Reflected Ripple Current (pk-pk) - 20 mA 50 mA Input Reflected Ripple Current (rms) - 3 mA 7 mA 2 2 Notes Tested with simulated source impedance of 15 uH, 5 Hz to 20 MHz; use a 100 uF/100 V electrolytic capacitor with ESR=1 ohm max at 200 kHz at the input. 2 I t Inrush Current Transient - 0.01 A s 0.02 A s Turn On Voltage Threshold Turn Off Voltage Threshold - 17 V 16 V - 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 24 Vdc Input 8 Vdc / 5 A Output 1/16 Brick Output Specifications Parameter Min Typ Max 7.88 V 8V 8.12 V Line Regulation - ±5 mV ±10 mV Load Regulation - ±5 mV ±10 mV Regulation Over Temperature(-40 °C to +85 °C) - ±20 mV ±35 mV Output Current 0A - 5A Current Limit Threshold 6A 7.5 A Output Voltage Set Point 2 9A 2 Short Circuit Surge Transient - 0.5 A s 1A s Ripple and Noise (rms) - 10 mV 20 mV Ripple and Noise (pk-pk) - 40 mV 75 mV Turn on Time - 24 mS 50 mS Overshoot at Turn on - 0% 5% 100 uF - 680 uF Overshoot - 150 mV 250 mV Settling Time - 120 uS 250 uS Overshoot - 150 mV 250 mV Settling Time - 120 uS 250 uS Output Capacitance Notes Vin=24 V; Io=50% load Tested at 0-20 MHz BW, with a 1 uF ceramic capacitor and a 10 uF Tantalum capacitor at the output. Transient Response 25% ~ 50% Max Load 50% ~ 25% Max Load Vo=8 V Test conditions: di/dt = 0.1 A/uS, Vin=24 V, with a 1 uF ceramic capacitor and a 10 uF Tantalum capacitor at the output. Note: All specifications are typical at nominal input, full load at 25 °C unless otherwise stated. General Specifications Parameter Efficiency Switching Frequency Isolation Capacitance Min 87% Typ 90% Max - 540 kHz 600 kHz 660 kHz - 3900 pF - Output Voltage Trim Range 90% Vo - 110% Vo Over Temperature Protection 120 °C - 140 °C - 130% Vo 140% Vo Over Voltage Protection MTBF TBD Notes Vin=24 V; Io=Io, max; full load Test conditions: Vin=24 V, full load and short the feedback optocoupler. Calculated Per Bell Core SR-332 (IO = Nominal; Ta = 25 °C) Dimensions Inches (L × W × H) Millimeters (L × W × H) Dimensions Inches (L × W × H) Millimeters (L × W × H) Weight - 1.3 x 0.9 x 0.334 33.0 x 22.9 x 8.49 SMT Package 1.3 x 0.9 x 0.378 33.0 x 22.9 x 9.60 Through Hole Package 13 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 24 Vdc Input 8 Vdc / 5 A Output 1/16 Brick Control Specifications Parameter Min Typ Max -0.3 V - 0.8 V 2.95 V - 18 V -0.3 V - 0.8 V 2.95 V - 18 V 0 mA - 1 mA Notes Remote On/Off Signal Low (Unit On) Signal High (Unit Off) Signal Low (Unit Off) Signal High (Unit On) Active Low Active High Current Sink - When Remote On/Off pin is open, for active low option, unit is off; for active high option, unit is 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 Ground pin. The Trim Up resistor should be connected between the Trim pin and the Vout. Only one of the resistors should be used for any given application. Vout Rtrimdown = Rtrimup = 511 − 10.22[kΩ] delta (100 + delta) ⋅ Vo ⋅ 5.11 − 626 − 10.22[kΩ] 1.225 ⋅ delta Module Trim GND Rtrimdown Vout Module Trim GND Note： delta = (Vo _ req − Vo ) × 100 [% ] Vo Vo_req=Desired (trimmed) output voltage[V] Output voltage Vo=8.003 V Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com Rtrimup ISOLATED DC/DC CONVERTERS 24 Vdc Input 8 Vdc / 5 A Output 1/16 Brick Efficiency Data 90% EFFICIENCY 85% 80% 18V 24V 36V 75% 70% 65% 60% 55% 50% 0.5A 1.25A 2.5A 3.75A 5A OUTPUT CURRENT (A) Thermal Derating Curve 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 24 Vdc Input 8 Vdc / 5 A Output 1/16 Brick Ripple and Noise Waveform 24 Vdc input, 1.2 V output Note: Ripple and noise at full load, with a 1uF ceramic cap and a 100 uF Tantalum cap at output, Ta=25 deg C. Transient Response Waveforms Vout=8.0 V 50% to 25% Load Transients Vout=8.0 V 25% to 50% Load Transients Note: Transient Response at Vin=48 V, di/dt=0.1A/uS, external 100 uF Tantalum cap and 1uF Ceramic cap, 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 24 Vdc Input 8 Vdc / 5 A Output 1/16 Brick Mechanical Outline SMT Package Pin Connections Pin Function 1 Vin (+) 2 Remote On/Off 3 Vin (-) 4 Vout- 5 Remote Sense (-) 6 Trim 7 Remote Sense (+) 8 Vout (+) 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 24 Vdc Input 8 Vdc / 5 A Output 1/16 Brick Through Hole Package Pin Connections Pin 1 2 3 4 5 6 7 8 Function Vin (+) Remote On/Off Vin (-) VoutRemote Sense (-) Trim Remote Sense (+) Vout (+) 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. 012907 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