0RSB-40U12B

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. RoHS Compliant       0RSB-40U12B Features         Isolated High Efficiency Fixed Frequency High Power Density Low Cost PRELIMINARY Rev.A Output Over-voltage Shut Down Over Temperature Protection OCP/SCP Remote ON/OFF Positive/Negative Remote Sense Basic Insulation Input Under-voltage Lockout 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 12 Vdc Input Voltage 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 12 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 Apr. 19, 2011 Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. Min -0.3 -0.3 -40 -55 Typ Max 80 100 18 1500 85 125 Unit V V V V C C 100mS maximum Notes Absolute Maximum Ratings Parameter Continuous Input Voltage Input Transient Voltage Remote On/Off I/O isolation voltage Ambient Temperature Storage Temperature 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 Input Current (full load) Input Current (no load) Remote Off Input Current Input Reflected Ripple Current (rms) Input Reflected Ripple Current (pk-pk) I t Inrush Current Transient Input Over Voltage Lockout Turn-on Voltage Threshold Turn-off Voltage Threshold 2 Min 18 78 16.6 16.2 Typ 48 60 1 3 20 0.01 17.2 16.8 Max 75 3.5 120 3 7 50 0.02 82 17.8 17.4 Unit V A mA mA mA mA As V V V 2 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. Note: All specifications are typical at 25 C unless otherwise stated. Output Specifications Parameter Output Voltage Set Point Load Regulation Line Regulation Regulation Over Temperature (-40deg.C-85deg.C) Output Ripple and Noise (pk-pk) Output Ripple and Noise (rms) Output Current Range Output DC Current Limit Short Circuit Surge Transien Turn on Time Min 11.75 0 3.7 Typ 12 ±9 ±6 ±20 90 30 5 0.5 25 Max 12.25 ±18 ±15 ±35 180 55 3.5 6 1 50 Unit V mV mV mV mV mV A A As mS 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 Apr. 19, 2011 Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. Min 10 Typ 0 Max 5 220 Unit % uF Notes 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 - 400 150 400 150 650 300 650 300 mV uS mV uS 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 Over Temperature Protection Min 83 Typ 85 500 125 Max Unit % kHz ℃ 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. Notes Vin=48V, full load Over Voltage Protection(Static) Weight Dimensions Inches (L × W × H) Millimeters (L × W × H) Isolation characteristics Input to Output Isolation Resistance Isolation Capacitance - 130 14 160 - % g - 1.30 x 0.90 x 0.46 33.02 x 22.86 x 11.69 10M - 3900 1500 - V Ohm pF 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 Apr. 19, 2011 Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. Efficiency Data 90% 85% 80% E F F IC IE N C Y 75% 70% 65% 60% 55% 50% 0.35 18V 24V 48V 75V 0.88 1.75 2.63 3.50 OUTPUT CURRENT (A) Remote On/Off Parameter Signal Low (Unit On) Signal High (Unit Off) Current Sink Active Low Min -0.3 2.4 0 Typ Max 0.8 18 1 Unit V V 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 Vin + Vcc Control with photocoupler circuit Vin+ On/off On/ off Vin - Vin- 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 Apr. 19, 2011 Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. 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 Apr. 19, 2011 Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. 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 Startup time Vin=48V, Vout=12V, 100% Load 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 Apr. 19, 2011 Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. 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  10.22k  delta Module Trim GND Rtrimdown (100  delta)  Vo  5.11  626 Rtrimup   10.22k  1 .225  delta Vout Module Trim GND Rtrimup Note: delta  Vo _ req  Vo   100 % Vo Vo_req=Desired (trimmed) output voltage [V] Output voltage Vo=12.007 V 400 Tr im resi sto r va l ue Rt ri m_d own (KOh m) Tr im resi sto r va l ue , Rtrim_u p(KOh m) 5000 4500 4000 3500 3000 2500 2000 1500 1000 500 360 320 280 240 200 160 120 80 40 0 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) 13.2 Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302  Tel 201-432-0463  Fax 201-432-9542  www.belfuse.com 8 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. Vo+ RS+ Sense+ Load SenseRS- 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. V o+ RS + Sense+ Load SenseRS- 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 Apr. 19, 2011 Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. 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 Inp ut 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 Apr. 19, 2011 Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. Mechanical Outline Pin 1 2 3 4 Function Vin(+) On/Off Vin(-) Vout(-) Dia. 0.04’’ 0.04’’ 0.04’’ 0.062’’ Pin 5 6 7 8 Function SENSE(-) TRIM SENSE(+) Vout(+) Dia. 0.04’’ 0.04’’ 0.04’’ 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 Apr. 19, 2011 Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. Revision History Date 2011-04-19 Revision PA First release Changes Detail Approval 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 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