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ISOLATED DC/DC CONVERTERS
48 Vdc Input 3.3 Vdc - 24 Vdc/7 A - 1.25 A Output
0RLC-25T Series
* * * * * * * Fixed Frequency (230 kHz)
RoHS Compliant
* * * * * *
Rev.A
Remote On/Off Output Voltage Trim Input Under Voltage Lockout SCP/OCP Over Temperature Protection Remote On/Off Logic (Option)
Output Over Voltage Shut Down Isolated High Efficiency High Power Density Low Cost Safety Approval to UL60950-1 (Pending)
Description
The 0RLC-25T series are isolated dc/dc converters that operate from a nominal 48 Vdc source. These units will provide up to 30 W of output power. These units are designed to be high efficient and very low cost. Features include remote on/off, over current protection, and under voltage lockout. These converters are provided in an industry standard package.
Part Selection
Output Voltage 3.3 Vdc 5.0 Vdc 12.0 Vdc 15.0 Vdc 24.0 Vdc Input Voltage 36 Vdc - 75 Vdc 36 Vdc - 75 Vdc 36 Vdc - 75 Vdc 36 Vdc - 75 Vdc 36 Vdc - 75 Vdc Max. Output Current 7A 5A 2.5 A 2.0 A 1.25 A Max. Output Power 23 W 25 W 30 W 30 W 30 W Typical Efficiency 88% 90% 90% 90% 91% Model Number Active High 0RLC-25T033 0RLC-25T050 0RLC-25T120 0RLC-25T150 0RLC-25T240 Model Number Active Low 0RLC-25T03L 0RLC-25T05L 0RLC-25T12L 0RLC-25T15L 0RLC-25T24L
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 Ambient Temperature Storage Temperature Min -0.3 V -0.3 V -40 C -55 C Typ Max 80 V 12 V 85 C 125 C Notes 100 V for 100 mS Max
Input Specifications
Parameter Input Voltage Input Current Input Current (no load) Remote Off Input Current Input Reflected Ripple Current (rms) Input Reflected Ripple Current (pk-pk) I t Inrush Current Transient Turn-on Input Voltage Turn-off Input Voltage
2
Min 36 V 31 V 30 V
Typ 25 mA 3 mA 10 mA 40 mA 0.012 A s 34 V 33 V
2
Max 75 V 1.1 A 40 mA 10 mA 20 mA 60 mA 0.024 A s 36 V 35 V
2
Notes
With simulated source impedance of 10 uH, 5 Hz to 20 MHz. And use a 100 uF/ 100 V electrolytic capacitor with ESR=1 ohm max, at 200 kHz.
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 - 24 Vdc/7 A - 1.25 A Output
Min VO=3.3 V VO=5.0 V VO=12.0 V VO=15.0 V VO=24.0 V Line Regulation VO=3.3 V VO=5.0 V VO=12.0 V VO=15.0 V VO=24.0 V Load Regulation VO=3.3 V VO=5.0 V VO=12.0 V VO=15.0 V VO=24.0 V Temperature Regulation (-40 C to +85 C) VO=3.3 V VO=5.0 V VO=12.0 V VO=15.0 V VO=24.0 V Ripple and Noise (rms) VO=3.3 V VO=5.0 V VO=12.0 V VO=15.0 V VO=24.0 V Ripple and Noise (pk-pk) VO=3.3 V VO=5.0 V VO=12.0 V VO=15.0 V VO=24.0 V Output Current VO=3.3 V VO=5.0 V VO=12.0 V VO=15.0 V VO=24.0 V Current Limit Threshold VO=3.3 V VO=5.0 V VO=12.0 V VO=15.0 V VO=24.0 V Short Circuit Surge Transient Turn on Time Overshoot at Turn On Output Capacitance VO=3.3 V VO=5.0 V VO=12.0 V VO=15.0 V VO=24.0 V 0A 0A 0A 0A 0A 7.7 A 5.5 A 3.0 A 2.2 A 1.5 A 0 uF 0 uF 0 uF 0 uF 0 uF 2 mV 4 mV 9 mV 10 mV 15 mV 30 mV 40 mV 100 mV 120 mV 150 mV 10 mV 10 mV 10 mV 15 mV 20 mV 40 mV 40 mV 40 mV 80 mV 85 mV 2 0.5 A s 10 mS 0% 5 mV 8 mV 18 mV 20 mV 30 mV 50 mV 70 mV 170 mV 200 mV 240 mV 20 mV 20 mV 20 mV 30 mV 40 mV 75 mV 75 mV 75 mV 120 mV 150 mV 7.0 A 5.0 A 2.5 A 2.0 A 1.25 A 12.0 A 8.0 A 4.2 A 3.4 A 2.2 A 2 1A s 25 mS 5% 3300 uF 2200 uF 330 uF 330 uF 330 uF 1 mV 2 mV 5 mV 8 mV 10 mV 3 mV 5 mV 10 mV 15 mV 20 mV 3.234 V 4.900 V 11.76 V 14.70 V 23.52 V Typ 3.3 V 5.0 V 12.0 V 15.0 V 24.0 V Max 3.366 V 5.100 V 12.240 V 15.300 V 24.480 V Notes Test condition: Vin=48 V, IO=50% full load at the output.
Output Specifications
Parameter Output Voltage Set Point
Test condition of the output ripple and noise: 0-20 MHz BW, with a 1 F ceramic capacitor and a 220 uF /35 V 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 - 24 Vdc/7 A - 1.25 A Output
Output Specifications (continued)
Parameter Transient Response 50% ~ 75% Max Load 25% ~ 50% Max Load 50% ~ 75% Max Load 25% ~ 50% Max Load 50% ~ 75% Max Load 25% ~ 50% Max Load 50% ~ 75% Max Load 25% ~ 50% Max Load 50% ~ 75% Max Load 25% ~ 50% Max Load Overshoot Settling Time Overshoot Settling Time Overshoot Settling Time Overshoot Settling Time Overshoot Settling Time Overshoot Settling Time Overshoot Settling Time Overshoot Settling Time Overshoot Settling Time Overshoot Settling Time Vo=3.3 V 75 mV 150 uS 75 mV 150 uS 100 mV 150 uS 100 mV 150 uS 150 mV 150 uS 150 mV 150 uS 100 mV 200 uS 100 mV 200 uS 150 mV 300 uS 150 mV 300 uS 100 mV 200 uS 100 mV 200 uS 150 mV 200 uS 150 mV 200 uS 200 mV 200 uS 200 mV 200 uS 200 mV 300 uS 200 mV 300 uS 300 mV 500 uS 300 mV 500 uS Min Typ Max Notes
Vo=5.0 V
Vo=12.0 V
Test condition of the transient response: di/dt=0.1 A/us, Vin=48 V, with a 220 uF/35 V electrolytic capacitor at the output.
Vo=15.0 V
Vo=24.0 V
Note: All specifications are typical at nominal input, full load at 25C unless noted.
General Specifications
Parameter Efficiency VO=3.3 V VO=5.0 V VO=12.0 V VO=15.0 V VO=24.0 V Switching Frequency Output Trim Range I/O Isolation Voltage Isolation Capacitance Output Voltage Trim Range Over Temperature Protection Over Voltage Protection VO=3.3 V VO=5.0 V VO=12.0 V VO=15.0 V VO=24.0 V MTBF Dimensions Inches (L x W x H) Millimeters (L x W x H) Weight 2.0 x 1.0 x 0.438 50.8 x 25.4 x 11.14 20 g 85% 87% 87% 87% 86% 200 kHz 90% VO 1500 V 90% 3.9 V 5.7 V 13.6 V 18.0 V 28.8 V 88% 90% 90% 90% 89% 230 kHz 1500 pF 110 C 2,602,427 hours 260 kHz 110% VO 110% 5.0 V 7.0 V 14.2 V 22.5 V 36.0 V Measured at Vin=48 V, IO=Io, max Min Typ Max Notes
Test condition of Over Voltage Protection: Vin=48 V, Io=100% load at 25 C ambient. Calculated Per Bell Core SR-332 (IO = 80% load; Vin=48 V; Vo=3.3 V; Ta = 25 C)
-
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 - 24 Vdc/7 A - 1.25 A Output
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 Low -0.3 V 3.5 V -0.3 V 3.5 V 0.3 mA 0.8 V 12 V 0.8 V 12 V 0.75 mA The remote On/Off pin open, Unit On. Min Typ Max Notes
Active High
Output Trim Equations
Equations for calculating the trim resistor (in k) given the desired adjusted voltage (Vadj) and the nominal output voltage of the converter (Vnom) are shown below. The Trim Down resistor should be connected between the Trim pin and Vout. The Trim Up resistor should be connected between the Trim pin and Ground. Only one of the resistors should be used for any given application.
Vout
Rtrim _ down
A = -B Vnom - Vadj
Rtrim_down
Module
Trim
GND
Vout
Rtrim _ up =
C -D Vadj - Vnom
Module Trim
Rtrim_up
GND
Vnom
24.0 15.0 12.0 5.0 3.3
A
272.305 92.125 53.320 19.300 21.711
B
15.664 9.360 9.260 15.120 40.610
C
31.634 18.400 14.025 6.350 13.032
D
3.010 2.000 3.650 10.000 30.100
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 - 24 Vdc/7 A - 1.25 A Output
Efficiency Data
95% 90% 85% 80% 75% 70% 65% 60% 55% 50% 0.5A
90% 85% EFFICIENCY
EFFICIENCY
80% 75% 70% 65% 60% 55% 50% 0.7A 1.75A 3.5A 5.25A 7A OUTPUT CURRENT (A) 36V 48V 75V
36 48 75
1.25A
2.5A
3.75A
5A
OUTPUT CURRENT (A)
0RLC-25T033
0RLC-25T050
95% 90% 85% 80% 75% 70% 65% 60% 55% 50% 0.25A 0.625A 1.25A 1.875A 2.5A OUTPUT CURRENT (A)
36 48 75
95% 90% 85% 80% 75% 70% 65% 60% 55% 50% 0.2A 0.5A 1.0A 1.5A 2.0A OUTPUT CURRENT (A)
EFFICIENCY
0RLC-25T120
EFFICIENCY
36 48 75
0RLC-25T150
95% 90% 85% 80% 75% 70% 65% 60% 55% 50% 0.125A 0.3215A 0.625A 0.9375A 1.25A OUTPUT CURRENT (A)
EFFICIENCY
36 48 75
0RLC-25T240
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 - 24 Vdc/7 A - 1.25 A Output
Thermal Derating Curves
0RLC-25T033
0RLC-25T050
0RLC-25T120
0RLC-25T150
0RLC-25T240
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 - 24 Vdc/7 A - 1.25 A Output
Ripple and Noise Waveforms
Ripple and noise at full load, 3.3 Vdc/7 A output
Ripple and noise at full load, 5.0 Vdc/5 A output
Ripple and noise at full load, 12 Vdc/2.5 A output
Ripple and noise at full load, 15 Vdc/2 A output
Ripple and noise at full load, 24 Vdc/1.25 A output Note: Ripple and noise at 48 Vdc input, with a 0.47 uF ceramic cap 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
48 Vdc Input 3.3 Vdc - 24 Vdc/7 A - 1.25 A Output
Transient Response Waveforms
Transients 25% to 50% load 3.3 Vdc output
Transients 50% to 75% load 3.3 Vdc output
Transients 25% to 50% load 5.0 Vdc output
Transients 50% to 75% load 5.0 Vdc output
Transients 25% to 50% load 12 Vdc output
Transients 50% to 75% load 12 Vdc 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 - 24 Vdc/7 A - 1.25 A Output
Transient Response Waveforms (continued)
Transients 25% to 50% load 15 Vdc output
Transients 50% to 75% load 15 Vdc output
Transients 25% to 50% load 24 Vdc output
Transients 50% to 75% load 24 Vdc output
Note: Transient response at 48 Vdc input, di/dt=0.1 A/uS, with external 220 uF electrolytic cap and 0.47 uF ceramic cap at the 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 3.3 Vdc - 24 Vdc/7 A - 1.25 A Output
Mechanical Outline
Pin Connections
Pin 1 2 3 4 5 6 Function Vin+ VinCNT Vo+ VoTrim
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. 030207
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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