SRSB-50T03C

ISOLATED DC/DC CONVERTERS 36 Vdc - 75 Vdc Input, Jul. 09, 2010 3.3 Vdc/15 A Output Bel Power Inc., a subsidiary of Bel Fuse Inc. RoHS Compliant • • • • • • xRSB-50T03C Features • • • • • • • • • Isolated High Efficiency Rev.B Output Over Voltage Shutdown Output Voltage Trim Over Temperature Protection SCP/OCP Basic Insulation Remote On/Off Fixed Frequency (600 kHz) High Power Density Input Under Voltage Lockout Low Cost Positive/Negative Remote Sense Class 1, Category 2, Isolated DC/DC Converter (refer to IPC-9592) UL60950-1 Recognized (UL/cUL) (Pending) Applications • • • Networking Computers and peripherals Telecommunications Description The xRSB-50T03C is an isolated dc/dc converter that operates from a nominal 48 Vdc source. This unit will provide up to 50 W of output power from a nominal 48 Vdc input. This unit is designed to be highly efficient and low cost. Features include remote on/off, over current protection and under voltage lockout. The converter is provided in an industry standard sixteenth brick package. Part Selection Output Voltage 3.3 Vdc Input Voltage 36 Vdc - 75 Vdc Max. Output Current 15 A Max. Output Power 50 W Typical Efficiency 89% Model Number Active Low xRSB-50T03C Notes: Add “G” suffix at the end of the model number to indicate Tray Packaging. Part Number Explanation x R SB – 50 T 03 C 12 3 4 56 7 1---“x” can be “0” or “S”, “0” mean through hole mount and “S” mean surface mount 2---RoHS 6, change “R” to “7” means RoHS 5 3---Series name, 1/16 brick 4---Series code 5---Input range (36-75V) 6---Output voltage (3.3V) 7---Suffix 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 36 Vdc - 75 Vdc Input, Jul. 09, 2010 3.3 Vdc/15 A Output 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 non-operating 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 Turn-on Voltage Threshold Turn-off Voltage Threshold 2 Min 36 30 Typ 48 70 1 3 20 32 31 Max 75 2 120 3 7 50 0.02 35 - Unit V A mA mA mA mA As V V 2 Notes With simulated source impedance of 10uH, 5Hz to 20MHz; use a 100uF/100V electrolytic capacitor with ESR=1 ohm max, at 200 kHz. CAUTION: This converter is not internally fused. An input line fuse must be used in application. Recommend a fast-acting fuse with maximum rating of 5A on system board. Refer to the fuse manufacture’s datasheet for further information. Notes: 1. This converter has internal L-C (1.0uH-1.0uF) filter. 2. 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) Ripple and Noise (pk-pk) Ripple and Noise (rms) Output Ripple and Noise(Pk-Pk) under worst case Min 3.25 Typ 3.30 ±4 ±3 ±9 55 12 Max 3.35 ±9 ±8 ±16 90 25 100 Unit V mV mV mV mV mV mV 0-20MHz BW, with a 1µF ceramic capacitor and the minimum external cap at output over all operating input voltage, load and ambient temperature Notes 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 2 ISOLATED DC/DC CONVERTERS 36 Vdc - 75 Vdc Input, Jul. 09, 2010 3.3 Vdc/15 A Output Bel Power Inc., a subsidiary of Bel Fuse Inc. Parameter Min 0 19 Typ 22 35 35 0 Max 15 26 1 15 70 70 5 10000 Unit A A As mS mS mS % uF Enable form Vin Enable form ON/OFF 2 Output Specifications (continued) Notes Output Current Range Output DC Current Limit Short Circuit Surge Transient Rise Time Turn on Time Overshoot at Turn on Output Capacitance Transient Response △V Overshoot 50%~75% of Max Load Settling Time △V Overshoot 75%~50% of Max Load Settling Time 3000 Vo= 3.3 V - 150 120 150 120 250 200 250 200 mV uS mV uS di/dt=0.1A/us, Vin=48Vdc, Ta=25°C, with a 1µF ceramic capacitor and the minimum external 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 Over Voltage Protection (Static) Weight FIT Dimensions Inches (L × W × H) Millimeters (L × W × H) Dimensions Inches (L × W × H) Millimeters (L × W × H) Isolation characteristics Input to Output Isolation Resistance Isolation Capacitance 10M 3900 1500 V Ohm pF 1.30 x 0.9 x 0.38 33.02 x 22.86 x 9.60 1.30 x 0.9 x 0.36 33.02 x 22.86 x 9.24 0RSB-50T03C Min 86 Typ 89 600 120 4.29 13 TBD Max 140 5.28 Unit % kHz ℃ V g Calculated Per Bell Core SR-332 (Vin=48V, Vo=3.3V, Io=80%load, Ta 9 = 25 °C, FIT=10 /MTBF) Notes Vin=48 V, full load. - SRSB-50T03C 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 36 Vdc - 75 Vdc Input, Jul. 09, 2010 3.3 Vdc/15 A Output Bel Power Inc., a subsidiary of Bel Fuse Inc. Efficiency Data 90.00% 85.00% EFFICIENCY 80.00% 75.00% 70.00% 65.00% 60.00% 55.00% 50.00% 1.5A 3.75A 7.5A 11.25A 15A OUTPUT CURRENT(A) 36V 48V 75V Thermal Derating Curve Maximum junction temperature of semiconductors derated to 120 degree C. 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 36 Vdc - 75 Vdc Input, Jul. 09, 2010 3.3 Vdc/15 A Output Bel Power Inc., a subsidiary of Bel Fuse Inc. Thermal Derating Curve (continued) Temperature reference points on top side Temperature reference points on bottom side Ripple and Noise Waveform 48 Vdc input, 3.3 Vdc/15 A output Note: Ripple and noise at full load, and with a 1uF ceramic cap and a 3000 uF 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 5 ISOLATED DC/DC CONVERTERS 36 Vdc - 75 Vdc Input, Jul. 09, 2010 3.3 Vdc/15 A Output Bel Power Inc., a subsidiary of Bel Fuse Inc. Transient Response Waveforms 50%-75% Load Transients at Vin=48 V 75%-50% Load Transients at Vin=48 V Note: Transient response at di/dt=0.1A/us, with 1uF ceramic cap and 3000uF cap at output, and Ta=25 deg C. Remote On/Off Parameter Signal Low (Unit On) Signal High (Unit Off) Current Sink Active Low Min -0.3 2.95 0 Typ Max 0.8 18 1 Unit V V mA Notes The remote on/off pin open, Unit off. Recommended remote on/off circuit for active low Vin+ On/off Vin+ 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 6 ISOLATED DC/DC CONVERTERS 36 Vdc - 75 Vdc Input, Jul. 09, 2010 3.3 Vdc/15 A Output 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 GND pin. The Trim Up resistor should be connected between the Trim pin and the Vout pin. Only one of the resistors should be used for any given application. Minimum trim down voltage is 2.97V Maximum trim up voltage is 3.63V. The total voltage increased by trim and remote sense should not exceed 10% of the nominal output voltage. Rtrimdown = 511 − 10.22[kΩ] delta Vout Module Trim GND Rtrimdown Rtrimup = (100 + delta ) ⋅ Vo ⋅ 5.11 − 626 − 10.22[kΩ] 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=3.308 V 300 Trim resistor value Rtrim_down(KOhm) Trim resistor value,Rtrim_up(KOhm) 1500 1350 1200 1050 900 750 600 450 300 150 270 240 210 180 150 120 90 60 30 0 2.64 2.71 2.77 2.84 2.9 2.97 3.04 3.1 Adjusted output voltage Vo,adj (V) 3.17 3.23 3.3 0 3.3 3.33 3.37 3.4 3.43 3.46 3.5 3.53 Adjusted output voltage Vo,adj(V) 3.56 3.6 3.63 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 36 Vdc - 75 Vdc Input, Jul. 09, 2010 3.3 Vdc/15 A Output 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 8 ISOLATED DC/DC CONVERTERS 36 Vdc - 75 Vdc Input, Jul. 09, 2010 3.3 Vdc/15 A Output Bel Power Inc., a subsidiary of Bel Fuse Inc. Startup & Shutdown Rise time Test Condition: 48Vin, 3.3V/15A Startup time Startup from Vin Ch1: Vo, Ch2: Vin Test Condition: 48Vin, 3.3V/15A Shutdown Startup from on/off Startup from on/off, Ch2: Vin Test Condition: 48Vin, 3.3V/15A Test Condition: 48Vin, 3.3V/15A 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 36 Vdc - 75 Vdc Input, Jul. 09, 2010 3.3 Vdc/15 A Output 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 overcurrent condition persists beyond a few milliseconds, the module will shut down into hiccup mode and restart once every 300mS. The module operates normally when the output current goes into specified range. The typical average output current is 0.8A during hiccup. Expansion of on time portion of above figure 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 36 Vdc - 75 Vdc Input, Jul. 09, 2010 3.3 Vdc/15 A Output Bel Power Inc., a subsidiary of Bel Fuse Inc. Over Voltage Protection The output overvoltage protection consists of circuitry that monitors the voltage on the output terminals. If the voltage on the output terminals exceeds the over voltage protection threshold, the module will shutdown into hiccup mode and restart once every 400mS. The module operates normally when the fault is cleared. Test setup: Vo+ K Trim R Vo- R=100ohm CH1: Output voltage waveform CH2: Output Current waveform 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 36 Vdc - 75 Vdc Input, Jul. 09, 2010 3.3 Vdc/15 A Output Bel Power Inc., a subsidiary of Bel Fuse Inc. Over Temperature Protection The OTP is achieved by thermistor U1 and the threshold is set at 120C in non-latch mode; the hottest component Q5 reaches 130C with 100LFM air flow correspondingly. It will restart automatically when the temperature falls down to 100C. The protecting point will be varied a little under different conditions (air flow, ambient temperature, input voltage, load...). the hottest component Q5 on top view thermistor U1 on bottom view Under Voltage Lockout Inp ut Current Under-voltage Lockout Voltage Falling Voltage Rising V1 V2 Input Voltage (V) V1=31V V2=32V Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com 12 ISOLATED DC/DC CONVERTERS 36 Vdc - 75 Vdc Input, Jul. 09, 2010 3.3 Vdc/15 A Output Bel Power Inc., a subsidiary of Bel Fuse Inc. Mechanical Outline 0RSB-50T03C Pin Connections pin# 1 2 3 4 function Vin (+) On/Off Vin (-) Vo (-) pin# 5 6 7 8 function RS (-) Trim RS (+) Vo (+) 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 13 ISOLATED DC/DC CONVERTERS 36 Vdc - 75 Vdc Input, Jul. 09, 2010 3.3 Vdc/15 A Output Bel Power Inc., a subsidiary of Bel Fuse Inc. Mechanical Outline (continued) SRSB-50T03C Pin Connections pin# 1 2 3 4 function Vin (+) On/Off Vin (-) Vo (-) pin# 5 6 7 8 function RS (-) Trim RS (+) Vo (+) Note: This module is recommended and compatible with Pb-Free Reflow Soldering and must be soldered using a reflow profile with a peak temperature of no more than 260ºC 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 14 ISOLATED DC/DC CONVERTERS 36 Vdc - 75 Vdc Input, 3.3 Vdc/15 A Output Jul. 09, 2010 Bel Power Inc., a subsidiary of Bel Fuse Inc. Revision History Date 2010-3-23 2010-7-9 Version A B First release Update the Outline drawing of 0RSB-50T03C Changes Detail Approval Jack Fan 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. ©2010 Bel Fuse Inc. Specifications subject to change without notice. 070910 15 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