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ISOLATED DC/DC CONVERTERS
24 Vdc/48 Vdc Input 1.2 Vdc - 12 Vdc / 18 A - 3.5 A Outputs, 1/16 Brick
XRSB-40U Series
* * * * * * * * Isolated Fixed Frequency High Efficiency High Power Density Low Cost Output Voltage Trim Basic Insulation
RoHS Compliant
* * * * * * * *
Rev.A
Input Under Voltage Lockout Output Over Voltage Shutdown OCP/SCP Over Temperature Protection Wide Input Voltage Positive/Negative Remote Sense Through Hole and SMT(Option) Input Over Voltage Protection
Remote On/Off Logic (Option)
Description
The XRSB-40U series are isolated dc/dc converters that operate from a nominal 24 Vdc or 48 Vdc source. These units will provide up to 40 W of output power from an 18 Vdc - 75 Vdc wide input range. 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 1.2 Vdc 1.5 Vdc 1.8 Vdc 2.5 Vdc 3.3 Vdc 5.0 Vdc 12 Vdc Input Voltage 18 Vdc - 75 Vdc 18 Vdc - 75 Vdc 18 Vdc - 75 Vdc 18 Vdc - 75 Vdc 18 Vdc - 75 Vdc 18 Vdc - 75 Vdc 18 Vdc - 75 Vdc Max. Output Current 18 A 16 A 14 A 12 A 10 A 8A 3.5 A Max. Output Power 22 W 24 W 25 W 30 W 33 W 40 W 42 W Typical Efficiency 82% 84% 85% 86% 87.5% 87% 85% Model Number Active Low XRSB-40UV2L XRSB-40UV5L XRSB-40UV8L XRSB-40U02L XRSB-40U03L XRSB-40U05L XRSB-40U12L Model Number Active High XRSB-40UV20 XRSB-40UV50 XRSB-40UV80 XRSB-40U025 XRSB-40U033 XRSB-40U050 XRSB-40U120
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 -40 C -55 C Typ Max 80 V 18 V 1500 V 85 C 125 C Notes
Input Specifications
Parameter Input Voltage Input Current (full load) Vo=1.2 V - 1.8 V Vo=2.5 V - 3.3 V Vo=5.0 V - 12 V Min 18 V Typ 48 V Max 75 V 2.5 A 3.0 A 3.5 A Notes
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/48 Vdc Input 1.2 Vdc - 12 Vdc / 18 A - 3.5 A Outputs, 1/16 Brick
Input Specifications (continued)
Parameter Input Current (no load) Remote Off Input Current Input Reflected Ripple Current (pk-pk) Input Reflected Ripple Current (rms) I2t Inrush Current Transient Turn On Voltage Threshold Turn Off Voltage Threshold Min 16.6 V 16.2 V Typ 60 mA 1 mA 20 mA 3 mA 0.01 A2s 17.2 V 16.8 V Max 120 mA 3 mA 50 mA 7 mA 0.02 A2s 17.8 V 17.4 V 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. Notes
Note: All specifications are typical at nominal input, full load at 25 C unless otherwise stated.
Output Specifications
Parameter Output Voltage Set Point Vo=1.2 V Vo=1.5 V Vo=1.8 V Vo=2.5 V Vo=3.3 V Vo=5.0 V Vo=12 V Line Regulation Vo=1.2 V - 1.8 V Vo=2.5 V Vo=3.3 V Vo=5.0 V Vo=12 V Load Regulation Vo=1.2 - 2.5 V Vo=3.3 - 5.0 V Vo=12 V Regulation Over Temperature(-40 C to +85 C) Vo=1.2 V Vo=1.5 - 1.8 V Vo=2.5 - 3.3 V Vo=5.0 V Vo=12 V Output Current Vo=1.2 V Vo=1.5 V Vo=1.8 V Vo=2.5 V Vo=3.3 V Vo=5.0 V Vo=12 V Short Circuit Surge Transient 0A 0A 0A 0A 0A 0A 0A Min 1.182 V 1.478 V 1.773 V 2.463 V 3.250 V 4.925 V 11.750 V Typ 1.2 V 1.5 V 1.8 V 2.5 V 3.3 V 5.0 V 12 V 0.5 mV 1.0 mV 3.0 mV 4.0 mV 6.0 mV 3 mV 4 mV 9 mV 4 mV 6 mV 9 mV 15 mV 20 mV 0.5 A s
2
Max 1.218 V 1.523 V 1.827 V 2.538 V 3.350 V 5.075 V 12.250 V 3 mV 4 mV 8 mV 9 mV 15 mV 5 mV 9 mV 18 mV 9 mV 14 mV 16 mV 30 mV 35 mV 18 A 16 A 14 A 12 A 10 A 8A 3.5 A 1A s
2
Notes
Test conditions: Vin=48 V; Io=50% load
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/48 Vdc Input 1.2 Vdc - 12 Vdc / 18 A - 3.5 A Outputs, 1/16 Brick
Output Specifications (continued)
Parameter Current Limit Threshold Vo=1.2 V Vo=1.5 V Vo=1.8 V Vo=2.5 V Vo=3.3 V Vo=5.0 V Vo=12 V Ripple and Noise (rms) Vo=1.2 V - 1.8 V Vo=2.5 V Vo=3.3 V Vo=5.0 V Vo=12 V Ripple and Noise (pk-pk) Vo=1.2 V - 1.8 V Vo=2.5 V Vo=3.3 V Vo=5.0 V Vo=12 V Turn on Time Overshoot at Turn on Output Capacitance Vo=1.2 V Vo=1.5 V Vo=1.8 V Vo=2.5 V Vo=3.3 V Vo=5.0 V Vo=12 V Transient Response Overshoot 25% ~ 50% Max Load Settling Time Overshoot 50% ~ 25% Max Load Settling Time Overshoot 25% ~ 50% Max Load Settling Time Overshoot 50% ~ 25% Max Load Settling Time Overshoot 25% ~ 50% Max Load Settling Time Overshoot 50% ~ 25% Max Load Settling Time Overshoot 25% ~ 50% Max Load Settling Time Overshoot 50% ~ 25% Max Load Settling Time Overshoot 25% ~ 50% Max Load Settling Time Overshoot 50% ~ 25% Max Load Settling Time 470 uF 470 uF 470 uF 470 uF 330 uF 150 uF 10 uF 40 mV 45 mV 55 mV 70 mV 90 mV 25 mS 0% 60 mV 80 uS 60 mV 80 uS 60 mV 80 uS 60 mV 80 uS 180 mV 80 uS 180 mV 80 uS 250 mV 100 uS 250 mV 100 uS 400 mV 150 uS 400 mV 150 uS 70 mV 80 mV 90 mV 120 mV 180 mV 50 mS 5% 15000 uF 10000 uF 10000 uF 5600 uF 4700 uF 2200 uF 220 uF 110 mV 150 uS 110 mV 150 uS 110 mV 150 uS 110 mV 150 uS 250 mV 150 uS 250 mV 150 uS 350 mV 200 uS 350 mV 200 uS 650 mV 300 uS 650 mV 300 uS 6 mV 10 mV 12 mV 25 mV 30 mV 12 mV 20 mV 25 mV 50 mV 55 mV Tested at 0-20 MHz BW, with a 1 uF ceramic capacitor and a 10 uF Tantalum capacitor at the output. Min 21 A 19 A 17 A 14 A 11 A 8.8 A 4.2 A Typ 25 A 22 A 20 A 17 A 14 A 10 A 5A Max 29 A 26 A 23 A 20 A 16 A 12.5 A 6A Notes
Recommend to use AVX TPS series Tantalum capacitor as min capacitor.
Vo=1.2 V
Vo=1.5 -1.8 V
Vo=2.5 -3.3 V
Test conditions: di/dt = 0.1 A/uS, Vin=48 V, with a 1 uF ceramic capacioor and a Min Capacitance of Tantalum capacitor at the output
Vo=5.0 V
Vo=12 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/48 Vdc Input 1.2 Vdc - 12 Vdc / 18 A - 3.5 A Outputs, 1/16 Brick
General Specifications
Parameter Efficiency Vo=1.2 V Vo=1.5 V Vo=1.8 V Vo=2.5 V Vo=3.3 V Vo=5.0 V Vo=12 V Switching Frequency Vo=1.2 V -12 V Vo=1.8 V Isolation Capacitance Over Temperature Protection Output Voltage Trim Range Over Voltage Protection MTBF 78% 79% 81% 83% 85% 85% 83% 450 kHz 500 kHz 90% Vo 82% 84% 85% 86% 87.5% 87% 85% 500 kHz 550 kHz 3900 pF 125 C 130% Vo TBD 1.3 x 0.9 x 0.446 33.0 x 22.9 x 11.34 1.3 x 0.9 x 0.460 33.0 x 22.9 x 11.39 14 g 550 kHz 600 kHz 110% Vo 160% Vo Test conditions: Vin=48 V, full load and short the feedback optocoupler. Calculated Per Bell Core SR-332 (IO = Nominal; Ta = 25 C) SRSB-40Uxxx Min Typ Max Notes
Vin=48 V, full load
Dimensions Inches (L x W x H) Millimeters (L x W x H) Weight
0RSB-40Uxxx
Note: All specifications are typical at 25 C unless otherwise stated.
Control Specifications
Parameter Remote On/Off Signal Low (Unit On) Signal High (Unit Off) Signal Low (Unit Off) Signal High (Unit On) Current Sink Active High Active Low -0.3 V 2.4 V -0.3 V 2.4 V 0 mA 0.8 V 18 V 0.8 V 18 V 1 mA When Remote On/Off pin is open, for active low option, unit is off; for active high option, unit is on Min Typ Max Notes
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/48 Vdc Input 1.2 Vdc - 12 Vdc / 18 A - 3.5 A Outputs, 1/16 Brick
Output Trim Equations
Equations for calculating the trim resistor are shown below (Unit: k). 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.
1) Trim Equations for Vo=1.2 V
Vo
Rtrimdown =
511 - 10.22 delta
Module
Trim Rtrimdown
Rtrimup =
(100 + delta ) Vo 5.11 - 313 - 10.22 0.6125 delta
GND
Note:
delta =
(Vo _ req - Vo ) x 100[% ]
Vo
Module
Vo=1.202 V
Vo Rtrimup Trim
Vo_req=Desired (trimmed) output voltage [V]
GND
2) Trim Equations for Vo=1.5 V - 12 V
Rtrimdown =
511 - 10.22 delta
Rtrimup =
Note:
(100 + delta ) Vo 511 - 626 - 10.22 1.225 delta
delta =
(Vo _ req - Vo ) x 100 [% ]
Vo
Vo_req=Desired (trimmed) output voltage [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
24 Vdc/48 Vdc Input 1.2 Vdc - 12 Vdc / 18 A - 3.5 A Outputs, 1/16 Brick
Efficiency Data
90% 85%
90% 85% EFFICIENCY 80% 75% 70% 65% 60% 55% 50%
4.50 9.00 13.50 18.00
EFFICIENCY
80% 75% 70% 65% 60% 55% 50% 1.80 OUTPUT CURRENT (A) 18V 24V 48V 75V
18V 24V 48V 75V
1.00
2.50
5.00
7.50
10.00
OUTPUT CURRENT (A)
XRSB-40UV2x
XRSB-40U03x
90% 85% 80% EFFICIENCY 75% 70% 65% 60% 55% 50% 0.80 2.00 4.00 6.00 8.00 OUTPUT CURRENT (A) 18V 24V 48V 75V
EFFICIENCY
90% 85% 80% 75% 70% 65% 60% 55% 50% 0.35 0.88 1.75 2.63 3.50 OUTPUT CURRENT (A) 18V 24V 48V 75V
XRSB-40U05x
XRSB-40U12x
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/48 Vdc Input 1.2 Vdc - 12 Vdc / 18 A - 3.5 A Outputs, 1/16 Brick
Thermal Derating Curves Vin=48 Vdc
XRSB-40UV2x
XRSB-40U03x
XRSB-40U05x
XRSB-40U12x
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/48 Vdc Input 1.2 Vdc - 12 Vdc / 18 A - 3.5 A Outputs, 1/16 Brick
Thermal Derating Curves (continued) Vin=24 Vdc
XRSB-40UV2x
XRSB-40U03x
XRSB-40U05x
XRSB-40U12x
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/48 Vdc Input 1.2 Vdc - 12 Vdc / 18 A - 3.5 A Outputs, 1/16 Brick
Ripple and Noise Waveforms
48 Vdc input, 1.2 Vdc output
48 Vdc input, 3.3 Vdc output
48 Vdc input, 5.0 Vdc output
48 Vdc input, 12 Vdc output
Note: Ripple and noise at full load, with a 1 uF ceramic capacioor and a Min Capacitance of Tantalum capacitor at the output, 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/48 Vdc Input 1.2 Vdc - 12 Vdc / 18 A - 3.5 A Outputs, 1/16 Brick
Transient Response Waveforms
Vout=1.2 V 50% to 25% Load Transients
Vout=1.2 V 25% to 50% Load Transients
Vout=3.3 V 50% to 25% Load Transients
Vout=3.3 V 25% to 50% Load Transients
Vout=5.0 V 50% to 25% Load Transients
Vout=5.0 V 25% to 50% Load Transients
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/48 Vdc Input 1.2 Vdc - 12 Vdc / 18 A - 3.5 A Outputs, 1/16 Brick
Transient Response Waveforms (continued)
Vout=12 V 50% to 25% Load Transients
Vout=12 V 25% to 50% Load Transients
Note: Transient Response at Vin=48 V, di/dt=0.1 A/uS, with a 1 uF ceramic capacioor and a Min Capacitance of Tantalum capacitor at the output, 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/48 Vdc Input 1.2 Vdc - 12 Vdc / 18 A - 3.5 A Outputs, 1/16 Brick
SMT Package (SRSB-40Uxxx)
Pin Connections
Pin 1 2 3 4 5 6 7 8 Function Vin (+) Remote On/Off Vin (-) Vout (-) Remote Sense (-) Trim Remote Sense (+) 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/48 Vdc Input 1.2 Vdc - 12 Vdc / 18 A - 3.5 A Outputs, 1/16 Brick
Through Hole Package (0RSB-40Uxxx)
Pin Connections
Pin 1 2 3 4 5 6 7 8 Function Vin (+) Remote On/Off Vin (-) Vout (-) Remote 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.
(c)2007 Bel Fuse Inc. Specifications subject to change without notice. 012907
CORPORATE Bel Fuse Inc. 206 Van Vorst Street Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
FAR EAST 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
EUROPE 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

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