ISOLATED DC/DC CONVERTERS 18 Vdc - 75 Vdc Input, 12 Vdc/3.5 A Output Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. Apr. 19, 2011 0RSB-40U12B RoHS Compliant PRELIMINARY Rev.A Features Isolated Output Over-voltage Shut Down High Efficiency Over Temperature Protection Fixed Frequency OCP/SCP High Power Density Remote ON/OFF Low Cost Positive/Negative Remote Sense Input Under-voltage Lockout Basic Insulation Output Voltage Trim Class 1, Category 2, Isolated DC/DC Converter (refer to IPC-9592) Applications Networking Computers and peripherals Telecommunications Description The 0RSB-40U12B series is isolated dc/dc converter that operates from a nominal 24 Vdc or 48 Vdc source. These units will provide up to 42 W of output power from an 18 - 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 Input Voltage 12 Vdc 18 Vdc - 75 Vdc Max. Output Current 3.5 A Max. Output Power 42 W Typical Efficiency 85% Model Number Active Low 0RSB-40U12B Notes: Add “G” suffix at the end of the model number to indicate Tray Packaging. Part Number Explanation 0 R SB – 40 U 12 B 1 2 3 4 5 6 7 1---Through hole mount 2---RoHS 6, change “R” to “7” means RoHS 5 3---Series name, 1/16 Brick 4---Series code 5---Input range (18-75V) 6---Output voltage (12V) 7---Option, “x” of the model part number to be 0-9, A-Z, which will represent the special request of customer. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 1 ISOLATED DC/DC CONVERTERS 18 Vdc - 75 Vdc Input, 12 Vdc/3.5 A Output Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. Apr. 19, 2011 Absolute Maximum Ratings Min Typ Max Unit -0.3 - 80 V - - 100 V -0.3 - 18 V - - 1500 V Ambient Temperature -40 - 85 C Storage Temperature -55 - 125 C Parameter Continuous Input Voltage Input Transient Voltage Remote On/Off I/O isolation voltage Notes 100mS maximum Note: Ratings used beyond the maximum ratings may cause a reliability degradation of the converter or may permanently damage the device. Input Specifications Parameter Operating Input Voltage Min 18 Input Current (full load) - - 3.5 A Input Current (no load) - 60 120 mA Remote Off Input Current - 1 3 mA Input Reflected Ripple Current (rms) - 3 7 mA Input Reflected Ripple Current (pk-pk) - 20 50 mA I t Inrush Current Transient - 0.01 0.02 As Input Over Voltage Lockout 78 - 82 V Turn-on Voltage Threshold 16.6 17.2 17.8 V Turn-off Voltage Threshold 16.2 16.8 17.4 V 2 Typ 48 Max 75 Unit V Notes With simulated source impedance of 15uH, 5Hz to 20MHz. Use a 100uF/100V electrolytic capacitor with ESR=1 ohm max, at 200KHz@25°C. 2 Note: All specifications are typical at 25 C unless otherwise stated. Output Specifications Parameter Min Typ Max Unit 11.75 12 12.25 V Load Regulation - ±9 ±18 mV Line Regulation - ±6 ±15 mV Regulation Over Temperature (-40deg.C-85deg.C) - ±20 ±35 mV Output Ripple and Noise (pk-pk) - 90 180 mV Output Ripple and Noise (rms) - 30 55 mV Output Current Range 0 - 3.5 A 3.7 5 6 A Short Circuit Surge Transien - 0.5 1 As Turn on Time - 25 50 mS Output Voltage Set Point Output DC Current Limit 2 Notes Vin=48V, Io=50% load 0-20MHz BW, with a 1µF ceramic capacitor and a 10uF Tantalum cap at output. Hiccup mode, auto recovery Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 2 ISOLATED DC/DC CONVERTERS 18 Vdc - 75 Vdc Input, 12 Vdc/3.5 A Output Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. Apr. 19, 2011 Output Specifications (continued) Parameter Overshoot at Turn on Output Capacitance Transient Response △V Overshoot 25%~50% of Max Load Settling Time △V Overshoot 50%~25% of Max Load Settling Time Vo= 12 V Min Typ Max Unit - 0 5 % 10 - 220 uF - 400 650 mV - 150 300 uS - 400 650 mV - 150 300 uS Notes di/dt=0.1A/us, Vin=48Vdc, Ta=25°C, with a 1µF ceramic capacitor and a 10uF Tantalum cap at output. Note: All specifications are typical at nominal input, full load at 25°C unless otherwise stated. General Specifications Parameter Efficiency Switching Frequency Min Typ Max Unit 83 85 - % - 500 - kHz Over Temperature Protection - 125 - ℃ Over Voltage Protection(Static) - 130 160 % Weight - 14 - g Notes Vin=48V, full load The OTP threshold is set at 125°C in non-latch mode, and the module will restart automatically when temperature falls down to 115°C. This voltage is achieved by trimming up output slowly. Dimensions Inches (L × W × H) Millimeters (L × W × H) 1.30 x 0.90 x 0.46 33.02 x 22.86 x 11.69 - - - 1500 V 10M - - Ohm - 3900 - pF Isolation characteristics Input to Output Isolation Resistance Isolation Capacitance 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 3 ISOLATED DC/DC CONVERTERS 18 Vdc - 75 Vdc Input, 12 Vdc/3.5 A Output Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. Apr. 19, 2011 Efficiency Data 90% 85% EFFICIENCY 80% 18V 24V 48V 75V 75% 70% 65% 60% 55% 50% 0.35 0.88 1.75 2.63 3.50 OUTPUT CURRENT (A) Remote On/Off Parameter Signal Low (Unit On) Signal High (Unit Off) Active Low Current Sink Min -0.3 Typ - Max 0.8 Unit V 2.4 - 18 V 0 - 1 mA Notes Remote on/off pin open, Unit off. Recommended remote on/off circuit for active low Vin+ Vin+ On/off On/off Vin- Vin- Control with open collector/drain circuit Control with photocoupler circuit Vin+ Vin+ On/off On/off Vin- Vin- Vcc Control with logic circuit Permanently on Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 4 ISOLATED DC/DC CONVERTERS 18 Vdc - 75 Vdc Input, 12 Vdc/3.5 A Output Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. Apr. 19, 2011 Thermal Derating Curve Maximum junction temperature of semiconductors derated to 120 degree C. Vin=24V Vin=48V Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 5 ISOLATED DC/DC CONVERTERS 18 Vdc - 75 Vdc Input, 12 Vdc/3.5 A Output Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. Apr. 19, 2011 Thermal Derating Curve (continued) The OTP is achieved by thermistor R65 and it is in non-latch mode when the hottest component Q5 reaches 130°C with 100LFM air flow correspondingly. It will restart automatically when the temperature falls down to 110°C. The protecting point will be varied a little under different conditions (air flow, ambient temperature, input voltage, load...). Temperature reference points on top side Temperature reference points on bottom side Ripple and Noise Waveform 48Vdc input, 12Vdc output Note: Ripple and noise at full load, with a 1uF ceramic cap and a 10 uF Tantalum cap at 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 6 ISOLATED DC/DC CONVERTERS 18 Vdc - 75 Vdc Input, 12 Vdc/3.5 A Output Apr. 19, 2011 Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. Transient Response Waveforms Vout= 12V 25%-50% Load Transients Vout= 12V 50%-25% Load Transients Note: Transient Response at Vin=48V, di/dt=0.1A/uS, with External 10uF Tantalum Cap and 1uF Ceramic Cap at the output, Ta=25 deg C. Startup & Shutdown Rise Time Vin=48V, Vout=12V, 100% Load Startup time Startup from Vin Ch1: Vout Ch2: Vin Vin=48V, Vout=12V, 100% Load Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 7 ISOLATED DC/DC CONVERTERS 18 Vdc - 75 Vdc Input, 12 Vdc/3.5 A Output Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. Apr. 19, 2011 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 511 10.22k delta Module Trim GND (100 delta) Vo 5.11 626 Rtrimup 10.22k 1 .225 delta Rtrimdown Vout Module Trim Rtrimup GND Note: delta Vo _ req Vo 100 % Vo 400 5000 360 4500 Trim resi stor value,Rtrim_up(KOhm) Trim resi stor value Rtrim_down(KOhm) Vo_req=Desired (trimmed) output voltage [V] Output voltage Vo=12.007 V 320 280 240 200 160 120 80 3500 3000 2500 2000 1500 1000 500 40 0 4000 9.8 10.02 10.24 10.46 10.68 10.9 11.12 11.34 11.56 11.78 Adjusted output voltage Vo,adj (V) 12 0 12 12.12 12.24 12.36 12.48 12.6 12.72 12.84 12.96 13.08 Adjusted output voltage Vo,adj(V) Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 8 13.2 ISOLATED DC/DC CONVERTERS 18 Vdc - 75 Vdc Input, 12 Vdc/3.5 A Output Apr. 19, 2011 Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. Remote Sense This module has remote sense compensation feature. It can minimize the effects of resistance between module’s output and load in system layout and facilitates accurate voltage regulation at load terminals or other selected point. 1. The remote sense lines carries very little current and hence do not require a large cross-sectional area. 2. This module compensates for a maximum drop of 10% of the nominal output voltage. 3. If the unit is already trimmed up, the available remote sense compensation range should be correspondingly reduced. The total voltage increased by trim and remote sense should not exceed 10% of the nominal output voltage. 4. When using remote sense compensation, all the resistance, parasitic inductance and capacitance of the system are incorporated within the feedback loop of this module. It can make an effect on the module's compensation, affecting the stability and dynamic response. A 0.1uF ceramic capacitor can be connected at the point of load to de-couple noise on the sense wires. 5. Recommend the connection of remote sense compensation as below figure. There are a resistor RS+ (100 ohm) from Vo+ to Sense+ and a resistor RS- (51 ohm)) from Vo- to Sense- inside of this module. RS+ Vo+ Sense+ Load RS- Sense- V o- 6. If not using remote sense compensation, please connect sense directly to output at module's pin, that is, connect sense+ to Vo+ and sense- to Vo- at module's pin, the shorter the better. See below figure. RS+ V o+ Sense+ Load RS- Sense- Vo- Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 9 ISOLATED DC/DC CONVERTERS 18 Vdc - 75 Vdc Input, 12 Vdc/3.5 A Output Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. Apr. 19, 2011 Over Current Protection To provide protection in a fault output overload condition, the module is equipped with internal current-limiting circuitry and can endure current limiting for a few mili-seconds. If the over current condition persists beyond a few milliseconds, the module will shut down into hiccup mode and restart once every 400mS. The module operates normally when the output current goes into specified range. The typical average output current is 0.5A during hiccup. Vin=48V Vin=24V Input Under-voltage Lockout Input Current Under-voltage Lockout Voltage Falling V1=16.8V V2=17.2V Voltage Rising V1 V2 Input Voltage (V) Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 10 ISOLATED DC/DC CONVERTERS 18 Vdc - 75 Vdc Input, 12 Vdc/3.5 A Output Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. Apr. 19, 2011 Mechanical Outline Pin Function Dia. Pin Function Dia. 1 Vin(+) 0.04’’ 5 SENSE(-) 0.04’’ 2 On/Off 0.04’’ 6 TRIM 0.04’’ 3 Vin(-) 0.04’’ 7 SENSE(+) 0.04’’ 4 Vout(-) 0.062’’ 8 Vout(+) 0.062’’ Note: This module is recommended and compatible with Pb-Free Wave Soldering and must be soldered using a peak solder temperature of no more than 260 ºC for less than 5 seconds. Note: 1) All Pins: Material - Copper Alloy; Finish – 3 micro inches minimum Gold over 50 micro inches minimum Nickel plate. 2) Undimensioned components are shown for visual reference only. 3) All dimensions in inches (mm); Tolerances: x.xx +/-0.02 in. (x.x +/-0.5mm) x.xxx +/-0.010 in. (x.xx +/-0.25mm). Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 11 ISOLATED DC/DC CONVERTERS 18 Vdc - 75 Vdc Input, 12 Vdc/3.5 A Output Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. Apr. 19, 2011 Revision History Date Revision 2011-04-19 PA Changes Detail Approval First release JZ Wang RoHS Compliance Complies with the European Directive 2002/95/EC, calling for the elimination of lead and other hazardous substances from electronic products. 2011 Bel Fuse Inc. Specifications subject to change without notice. 041911 12 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