ISOLATED DC/DC CONVERTERS 48 Vdc Input 3.3 Vdc - 24 Vdc/7 A A Output. Bel Power, Inc., a subsidiary of Bel Fuse, Inc.

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ISOLTED DC/DC CONERTERS 48 dc Input 3.3 dc 24 dc/7 1.

1 ISOLTED DC/DC CONERTERS 48 dc Input 3.3 dc 24 dc/ Output Features Isolated Output Over oltage Shutdown High Efficiency Output oltage Trim High Power Density OCP/SCP Fixed Frequency (23 KHz) Over Temperature Protection Low Cost Remote On/Off Input Under oltage Lockout Remote On/Off Logic (Optional) RLC25T Series RoHS Compliant Rev.B Class 1, Category 2, Isolated DC/DC Converter (refer to IPC9592) pplications Networking Computers and peripherals Telecommunications Description The RLC25T series are isolated dc/dc converters that operate from a nominal 48 dc source. These units will provide up to 3 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 oltage Input oltage Max. Output Current Max. Output Power Typical Efficiency Model Number ctive High Model Number ctive Low 3.3 dc 36 dc dc 7 23 W 88% RLC25T33 RLC25T3L 5. dc 36 dc dc 5 25 W 9% RLC25T5 RLC25T5L 12. dc 36 dc dc W 9% RLC25T12 RLC25T12L 15. dc 36 dc dc 2. 3 W 9% RLC25T15 RLC25T15L 24. dc 36 dc dc W 89% RLC25T24 RLC25T24L Notes: dd G suffix at the end of the model number to indicate Tray Packaging. Part Number Explanation R LC 25 T xx x Through hole mount 2RoHS 6, change R to 7 means RoHS 5 3Series name 4Series code 5Input range (36) 6Output voltage 7Enable, or 3 mean active high, and L means active low Bel Fuse Inc. 26 an orst Street, Jersey City, NJ 732 Tel Fax

2 ISOLTED DC/DC CONERTERS 48 dc Input 3.3 dc 24 dc/ Output bsolute Maximum Ratings Input oltage (continuous).3 8 Remote On/Off.3 12 mbient Temperature 4 85 C Storage Temperature C Note: Ratings used beyond the maximum ratings may cause a reliability degradation of the converter or may permanently damage the device. Input Specifications Input oltage 36 Input Current (full load) 1.1 Input Current (no load) 25 4 m Remote Off Input Current 3 1 m Input Reflected Ripple Current (rms) Input Reflected Ripple Current (pkpk) 1 2 m 4 6 m I 2 t Inrush Current Transient s Turnon oltage Threshold Turnoff oltage Threshold Note: ll specifications are typical at 25 C unless otherwise stated. With simulated source impedance of 1 uh, 5 Hz to 2 MHz. nd use a 1 uf/ 1 electrolytic capacitor with ESR=1 ohm max, at 2 khz. Output Specifications Output oltage Set Point O=3.3 O=5. O= Test condition: in=48, IO=5% load at the output. Line Regulation O=3.3 O=5. O=12. ±1 ±2 ±5 ±8 ±1 ±3 ±5 ±1 ±15 ±2 Load Regulation O=3.3 O=5. O=12. ±2 ±4 ±9 ±1 ±15 ±5 ±8 ±18 ±2 ±3 Bel Fuse Inc. 26 an orst Street, Jersey City, NJ 732 Tel Fax

3 ISOLTED DC/DC CONERTERS 48 dc Input 3.3 dc 24 dc/ Output Output Specifications (continued) Regulation Over Temperature (4 C to +85 C) O=3.3 O=5. O=12. Total Regulation O=3.3 O=5. O=12. Ripple and Noise (pkpk) O=3.3 O=5. O=12. Ripple and Noise (rms) O=3.3 O=5. O=12. Output Current Range O=3.3 O=5. O=12. Output DC Current Limit O=3.3 O=5. O= Short Circuit Surge Transient s Turn on Time 1 25 ms Overshoot at Turn on 5 % Output Capacitance O=3.3 O=5. O= uf Test condition of the output ripple and noise: 2 MHz BW, with a 1 µf ceramic capacitor and a 1 uf/35 electrolytic capacitor at the output. Bel Fuse Inc. 26 an orst Street, Jersey City, NJ 732 Tel Fax

4 ISOLTED DC/DC CONERTERS 48 dc Input 3.3 dc 24 dc/ Output Output Specifications (continued) Transient Response 5% ~ % Overshoot 1 Max Load Settling Time O= 15 2 us 25% ~ 5% Overshoot Max Load Settling Time 15 2 us 5% ~ % Overshoot 1 15 Max Load Settling Time O= 15 2 us 25% ~ 5% Overshoot Max Load Settling Time 15 2 us 5% ~ % Overshoot 15 2 Max Load Settling Time O= 15 2 us 25% ~ 5% Overshoot Max Load Settling Time 15 2 us 5% ~ % Overshoot 1 2 Max Load Settling Time O= 2 3 us 25% ~ 5% Overshoot Max Load Settling Time 2 3 us 5% ~ % Overshoot 15 3 Max Load Settling Time O= 3 5 us 25% ~ 5% Overshoot Max Load Settling Time 3 5 us Note: ll specifications are typical at nominal input, full load at 25 C unless otherwise stated. Test condition of the transient response: di/dt=.1 /us, in=48, with a 22 uf/35 electrolytic capacitor at the output. General Specifications Efficiency O=3.3 O=5. O= Bel Fuse Inc. 26 an orst Street, Jersey City, NJ 732 Tel Fax % % % % % Switching Frequency khz I/O Isolation oltage 15 Isolation Capacitance 15 pf Output oltage Trim Range 9 11 % Over Temperature Protection 11 C Over oltage Protection O=3.3 O=5. O= Weight 2 g MTBF 2,62,427 hours Dimensions Inches (L W H) Millimeters (L W H) 2. x 1. x x 25.4 x Note: ll specifications are typical at 25 C unless otherwise stated. Measured at in=48, IO=Io, max Test condition of Over oltage Protection: in=48, Io=1% load at 25 C ambient. Calculated Per Bell Core SR332 (IO = 8% load; in=48 ; o=3.3, Ta = 25 C)

5 ISOLTED DC/DC CONERTERS 48 dc Input 3.3 dc 24 dc/ Output Remote On/Off Signal Low (Unit On).3.8 ctive Low Signal High (Unit Off) Signal Low (Unit Off).3.8 ctive High Signal High (Unit On) Current Sink.3. m The remote on/off pin open, Unit off The remote on/off pin open, Unit on Output Trim Equations Equations for calculating the trim resistor (in kω) given the desired adjusted voltage (adj) and the nominal output voltage of the converter (nom) are shown below. The Trim Down resistor should be connected between the Trim pin and out. 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. R trim_ down nom adj B Module out Trim GND Rtrim_down R trim _ up adj C nom D Module out Trim GND Rtrim_up nom B C D Bel Fuse Inc. 26 an orst Street, Jersey City, NJ 732 Tel Fax

6 ISOLTED DC/DC CONERTERS 48 dc Input 3.3 dc 24 dc/ Output Efficiency Data EFFICIENCY 9% 85% 8% % 7% 65% 6% 55% 5% OUTPUT CURRENT () EFFICIENCY 95% 9% 85% 8% % 7% 65% 6% 55% 5% OUTPUT CURRENT () RLC25T33 RLC25T5 EFFICIENCY 95% 9% 85% 8% % 7% 65% 6% 55% 5% OUTPUT CURRENT () EFFICIENCY 95% 9% 85% 8% % 7% 65% 6% 55% 5% OUTPUT CURRENT () RLC25T12 RLC25T15 EFFICIENCY 95% 9% 85% 8% % 7% 65% 6% 55% 5% OUTPUT CURRENT () RLC25T24 Bel Fuse Inc. 26 an orst Street, Jersey City, NJ 732 Tel Fax

7 ISOLTED DC/DC CONERTERS 48 dc Input 3.3 dc 24 dc/ Output Thermal Derating Curves RLC25T33 RLC25T5 RLC25T12 RLC25T15 RLC25T24 Bel Fuse Inc. 26 an orst Street, Jersey City, NJ 732 Tel Fax

8 ISOLTED DC/DC CONERTERS 48 dc Input 3.3 dc 24 dc/ Output Ripple and Noise Waveforms Ripple and noise at full load, 3.3 dc/7 output Ripple and noise at full load, 5. dc/5 output Ripple and noise at full load, 12 dc/2.5 output Ripple and noise at full load, 15 dc/2 output Ripple and noise at full load, 24 dc/1.25 output Note: Ripple and noise at 48 dc input, with a.47 uf ceramic cap at the output, Ta=25 deg C. Bel Fuse Inc. 26 an orst Street, Jersey City, NJ 732 Tel Fax

9 ISOLTED DC/DC CONERTERS 48 dc Input 3.3 dc 24 dc/ Output Transient Response Waveforms Transients 25% to 5% load 3.3 dc output Transients 5% to % load 3.3 dc output Transients 25% to 5% load 5. dc output Transients 5% to % load 5. dc output Transients 25% to 5% load 12 dc output Transients 5% to % load 12 dc output Bel Fuse Inc. 26 an orst Street, Jersey City, NJ 732 Tel Fax

10 ISOLTED DC/DC CONERTERS 48 dc Input 3.3 dc 24 dc/ Output Transient Response Waveforms (continued) Transients 25% to 5% load 15 dc output Transients 5% to % load 15 dc output Transients 25% to 5% load 24 dc output Transients 5% to % load 24 dc output Note: Transient response at 48 dc input, di/dt=.1 /us, with external 22 uf electrolytic cap and.47 uf ceramic cap at the output, and Ta=25 deg C. Bel Fuse Inc. 26 an orst Street, Jersey City, NJ 732 Tel Fax

11 ISOLTED DC/DC CONERTERS 48 dc Input 3.3 dc 24 dc/ Output Mechanical Outline Pin Connections Pin Function 1 in+ 2 in 3 CNT 4 o+ 5 o 6 Trim Note: This module is recommended and compatible with PbFree Wave Soldering and must be soldered using a peak solder temperature of no more than 26 ºC for less than 5 seconds. Note: 1) ll Pins: Material Copper lloy; Finish 3 micro inches minimum Gold over 5 micro inches minimum Nickel plate. 2) Undimensioned components are shown for visual reference only. 3) ll dimensions in inches (mm); Tolerances: x.xx +/.2 in. (x.x +/.5mm) x.xxx +/.1 in. (x.xx +/.25mm). Bel Fuse Inc. 26 an orst Street, Jersey City, NJ 732 Tel Fax

ISOLTED DC/DC CONERTERS 48 dc Input 3.3 dc 24 dc/7 1.25 Output OutputConverter Revision History Date Revision Changes Detail pproval 2732 First Release.

12 ISOLTED DC/DC CONERTERS 48 dc Input 3.3 dc 24 dc/ Output OutputConverter Revision History Date Revision Changes Detail pproval 2732 First Release. XF Jiang B Update the notes in Remote On/Off. XF Jiang. RoHS Compliance Complies with the European Directive 22/95/EC, calling for the elimination of lead and other hazardous substances from electronic products. 21 Bel Fuse Inc. Specifications subject to change without notice CORPORTE FR EST EUROPE Bel Fuse Inc. Bel Fuse Ltd. Bel Fuse Europe Ltd. 26 an orst Street 8F/ 8 Luk Hop Street Preston Technology Management Centre Jersey City, NJ 732 San Po Kong Marsh Lane, Suite G7, Preston Tel Kowloon, Hong Kong Lancashire, PR1 8UD, U.K. Fax Tel Tel Fax Fax

ISOLATED DC/DC CONVERTERS 48 Vdc Input, 12 Vdc/8.35 A Output

ISOLATED DC/DC CONVERTERS 48 Vdc Input, 12 Vdc/8.35 A Output 0RQB-C0U12C RoHS Compliant PRELIMINARY Rev.A Isolated Output Over Voltage Shutdown High Efficiency OCP/SCP High Power Density Over Temperature Protection Low Cost Remote On/Off Input Under Voltage Lockout