RBE-12/20-D48 Series www.murata-ps.com Eighth-Brick 240-Watt Isolated DC/DC Converters Typical unit FEATURES PRODUCT OVERVIEW 240 Watts total output power, fixed12 VDC @ 20 A The fully isolated (2250 Vdc, no baseplate) RBE12/20-D48 series accept a 36 to 75 Volt DC input voltage range (48 VDC nominal) and converts it to a fixed 12Vdc output. Applications include 48V-powered datacom and telecom installations, base stations, cellular dataphone repeaters, instruments and embedded systems. Wideband output ripple and noise is a low 100 mV (typical), peak-to-peak. Reduced open frame overall height of 0.4˝ (10.2 mm) fits tight card cages. 94.5% ultra-high efficiency at full load with regulation 36 to 75 Volt DC input range (48 VDC nominal) Standard eighth-brick footprint 0.4-inch (10.2 mm) low height (no baseplate) Synchronous rectifier topology with 100 mV (typ.) ripple & noise Up to +85° Celsius thermal performance (with derating) Stable no-load operation Fully isolated to 2250 VDC (BASIC, no baseplate) The RBE’s regulated synchronous-rectifier topology and fixed frequency operation means excellent efficiencies up to 94.5%, enabling “no heatsink” operation for most applications up to +85° Celsius (see derating curves). “No fan” or zero airflow higher temperature applications may use the optional base plate for cold plate mounting or natural-convection heatsinks. Electronic protection features include input undervoltage lockout (UVLO) , output current limit, short circuit hiccup, and overtemperature shutdown. Available options include positive or negative logic On/Off control, conformal coating, various pin lengths, and the baseplate. Assembled using ISO-certified automated surface-mount techniques, the RBE series is certified to UL and IEC safety standards. Remote On/Off enable control Extensive protection features – SC, OC, UVLO, OT Certified to safety, emissions and environmental standards Meets UL 60950-1, CAN/CSAC22.2 No. 60950-1, IEC60950-1, EN60950-1 safety approvals (2nd Edition) F1 *TPMBUJPO Barrier +Vin (1) +Vout (8) t4XJUDIJOH External DC Power Source On/Off Control (2) Open = On $MPTFE0GG 1PTJUJWF MPHJD t'JMUFST Controller and Power 5SBOTGFS Duty Cycle 3FHVMBUJPO t$VSSFOU4FOTF Reference and Error Amplifier -Vin (3) -Vout (4) Figure 1. Connection Diagram Typical topology is shown. Murata Power Solutions recommends an external fuse at F1. For full details go to www.murata-ps.com/rohs www.murata-ps.com/support MDC_RBE-12-20-D48.B05Δ Page 1 of 16 RBE-12/20-D48 Series Eighth-Brick 240-Watt Isolated DC/DC Converters PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE Output Root Model ➀ VOUT (V) RBE-12/20-D48 11.7 Total IOUT Power (A, max) (W) 20 Input Ripple & Noise IIN, min. IIN, full (mVp-p) Regulation (max.) ➁ VIN Nom. Range load load Typ. Line (%) Load (%) (V) (V) (mA) (A) 234 100 ±2 ±3 48 36-75 80 5.16 Efficiency Min. Typ. 91% Package Case (inches) Case (mm) 94.5% 2.3x0.9x0.4 58.4x22.9x10.16 Please refer to the part number structure for additional options and complete ordering part numbers. ➁ Line regulation is given as Vin = 40V to 75V, Iout = half load. Load regulation is Vin = 48V, Iout = Imin to Imax. ➂ All specifications are at the full input voltage range, maximum load, and full temperature range unless otherwise noted. See detailed specifications. Output capacitors are 1 μF in parallel with 10 μF and 470μF capacitor across the input pins. I/O caps are necessary for our test equipment and may not be needed for your application. PART NUMBER STRUCTURE R BE - 12 / 20 - D48 N M B H RoHS Hazardous Substance Compliance (does not claim EU RoHS exemption 7b–lead in solder) C = RoHS-6 Output Configuration: R = Regulated Pin Length Option (Through-hole packages only) Eighth-Brick Package Isolated converter Blank = Standard pin length 0.180 inches (4.6mm) L1 = Pin length 0.110 inches (2.79mm) ➀ L2 = Pin length 0.145 inches (3.68mm) ➀ Nominal Output Voltage Maximum Rated Output Current in Amps Input Voltage Range D48 = 36-75V, 48V nominal On/Off Control Logic N = Negative logic P = Positive logic ➀ ➁ ➂ ➃ Lx - C Conformal coating (optional) Blank = no coating, standard H = Coating added, optional ➀ Baseplate Blank = No baseplate B = Baseplate installed ➁ Surface Mount Blank = Thru-hole pin mount M = Surface mount (MSL rating 1) ➂ Special quantity order is required; samples available with standard pin length only. SMT (M) models are not available with a baseplate. SMT (M) versions are not available in sample quantities. Some model number combinations may not be available. See website or contact your local Murata sales representative. www.murata-ps.com/support MDC_RBE-12-20-D48.B05Δ Page 2 of 16 RBE-12/20-D48 Series Eighth-Brick 240-Watt Isolated DC/DC Converters FUNCTIONAL SPECIFICATIONS Conditions ➀ Minimum Full power operation, full temperature range Operating or non-operating, tested: 100 mS max. duration Input to output None, install external fuse Power on or off, referred to -Vin 0 ABSOLUTE MAXIMUM RATINGS Input Voltage, Continuous Input Voltage, Transient Isolation Voltage Input Reverse Polarity On/Off Remote Control Output Power Typical/Nominal 0 Maximum Units 80 Vdc 100 Vdc 2250 Vdc Vdc Vdc W None 0 0 15 237.51 Current-limited, no damage, 0 20 A short-circuit protected Operating Ambient Temperature Range With derating -40 85 °C Absolute maximums are stress ratings. Exposure of devices to greater than any of these conditions may adversely affect long-term reliability. Proper operation under conditions other than those listed in the Performance/Functional Specifications Table is not implied nor recommended. Output Current Conditions ➀ ➂ INPUT Operating voltage range Voltage Transient (100ms duration) Recommended External Fuse Start-up threshold Undervoltage lockout Reverse Polarity Protection Internal Filter Type Input current Full Load Conditions Low Line Inrush Transient Short circuit Input current No Load Input Current Shut-Down Mode Input Current (Off, UV, OT) Reflected (back) ripple current ➁ Pre-biased startup 36 Fast blow Rising input voltage Falling input voltage None, install external fuse 32 30 48 15 33 31 None Pi 5.16 6.99 Vin = minimum Vin = 48V Measured at input with specified filter External voltage < Vset 0 150 80 5 70 Monotonic Vin = 48V Vin = 75V 91 90 94.5 93 Input to output, continuous Input to output, continuous 2250 2250 Iout = minimum, unit = ON, Vin = 48V 75 100 34 32 5.44 7.33 0.05 800 150 10 200 Vdc Vdc A Vdc Vdc Vdc A A A2-Sec. mA mA mA mA, pk-pk V GENERAL and SAFETY Efficiency Isolation Isolation Voltage – no baseplate Isolation Voltage – with baseplate Isolation Voltage, Input to baseplate Isolation Voltage, Output to baseplate Insulation Safety Rating Isolation Resistance Isolation Capacitance Safety Calculated MTBF % % Vdc Vdc Vdc Vdc 1500 1500 basic 10 1500 Certified to UL-60950-1, CSA-C22.2 No.60950-1, IEC/EN60950-1, 2nd Edition Per Telcordia SR332, issue 2, Method 1, Class 1, GF Tambient = +25C Mohm pF Yes Hours x 106 2.1 DYNAMIC CHARACTERISTICS Fixed Switching Frequency Startup Delay Rise time Dynamic Load Response Dynamic Load Peak Deviation 200 Power ON 10% Vout to 90% Vout (50% resistive load) Remote ON to 10% Vout, Vin = 48V (50% resistive load) 50-75-50% load step, settling time to within ±1% of Vout. (48Vin, 470uF output capacitance, 1A/uS) same as above KHz 15 mS 15 mS 2000 μSec ±600 mV 1 0.8 15 2 V V mA 1 15 1 2 V V mA FEATURES and OPTIONS Remote On/Off Control ➅ “N” suffix: Negative Logic, ON state Negative Logic, OFF state Control Current “P” suffix: Positive Logic, ON state Positive Logic, OFF state Control Current Base Plate ON = Ground pin or external voltage OFF = Pin open or external voltage Sinking -0.1 2.5 ON = Pin open or external voltage OFF = Ground pin or external voltage Sinking “B” suffix 3.5 0 www.murata-ps.com/support MDC_RBE-12-20-D48.B05Δ Page 3 of 16 RBE-12/20-D48 Series Eighth-Brick 240-Watt Isolated DC/DC Converters FUNCTIONAL SPECIFICATIONS, CONTINUED OUTPUT Total Output Power Voltage Nominal Output Voltage Total Output Voltage Range See Derating 0.0 234 237.51 W Vin = 48V, half load. ±1.5 accuracy Over sample load (0-20A) and temperature (see derating curves) 11.525 11.7 11.876 Vdc 10.5 12 12.5 Vdc 13.4 Vdc Vdc 20 No minimum load 28 20 A 38 A Hiccup technique, autorecovery within ±1.25% of Vout 4 10 A Output shorted to ground, no damage Continuous ±2 ±3 150 % % mV pk-pk % of Vnom./°C μF Vout Overshoot Overvoltage Protection Current Output Current Range Minimum Load Current Limit Inception Short Circuit Short Circuit Current Short Circuit Duration (remove short for recovery) Short circuit protection method Regulation ➄ Line Regulation Load Regulation Ripple and Noise Temperature Coefficient Maximum Capacitive Loading 13 Output voltage clamped 13.5 0 90% of Vnom., after warmup 24 Current limiting Vin = 40 to 75V., Vout = nom., 50% load Iout = 0 to 100%, Vin = 48V. 5 Hz- 20 MHz BW At all outputs Cap. ESR, Full resistive load 100 ±0.02 470 Outline Dimensions (no baseplate) Outline Dimensions (with baseplate) 4700 Conditions ➀ ➂ MECHANICAL (Through Hole Models) 2.3x0.9x0.4 max. 58.42x22.86x10.16 2.3x0.9x0.5 58.42x22.86x12.7 1.06 30 1.46 41.5 0.040±0.001 1.016±0.025 0.062±0.001 1.575±0.025 Copper alloy 50 5 Aluminum LxWxH (Please refer to outline drawing) Weight (no baseplate) Weight (with baseplate) Through Hole Pin Diameter Through Hole Pin Diameter Through Hole Pin Material TH Pin Plating Metal and Thickness Input pins (see drawings) Output pins (see drawings) Nickel subplate Gold overplate Baseplate Material Inches mm Inches mm Ounces Grams Ounces Grams Inches mm Inches mm μ-inches μ-inches ENVIRONMENTAL Operating Ambient Temperature Range Operating Case Temperature Storage Temperature Thermal Protection/Shutdown Electromagnetic Interference Conducted, EN55022/CISPR22 Radiated, EN55022/CISPR22 RoHS rating ➃ Notes With derating, no condensation No derating required Vin = Zero (no power) -40 -40 -55 115 125 85 120 125 130 °C °C °C °C External filter required B Class External filter required B RoHS-6 Class ➀ Unless otherwise noted, all specifications apply over the full input voltage range, full temperature range, nominal output voltage and full output load. General conditions are near sea level altitude and natural convection airflow unless noted. All models are tested and specified with external parallel 1 μF and 10 μF output capacitors. A 470 μF input capacitor is used across the input pins. All capacitors are low-ESR types mounted close to the converter. These capacitors are necessary for our test equipment and may not be needed in the user’s application. ➁ Input (back) ripple current is tested and specified over 5 Hz to 20 MHz bandwidth. Input filtering is Cbus = 220 μF, Cin = 33 μF and Lbus = 12 μH. ➂ All models are stable and regulate to specification under no load. ➃ Reduction of Hazardous Substances (RoHS) compliance is to RoHS-6 (six substances restricted including lead). ➄ Regulation specifications describe the output voltage changes as the line voltage or load current is varied from its nominal or midpoint value to either extreme. ➅ The Remote On/Off Control is referred to -Vin. ➆ Please refer to the Part Number Structure for complete ordering model numbers. www.murata-ps.com/support MDC_RBE-12-20-D48.B05Δ Page 4 of 16 RBE-12/20-D48 Series Eighth-Brick 240-Watt Isolated DC/DC Converters TYPICAL PERFORMANCE DATA Maximum Current Temperature Derating at sea level in Transverse Direction Vin= 36V (air flow direction is from Vin- to Vin+), no baseplate Maximum Current Temperature Derating at sea level in Longitudinal Direction Vin= 36V (air flow direction is from Vin to Vout), no baseplate 24 24 22 22 20 20 18 16 Output Current (Amps) Output Current (Amps) 18 2.0 m/s (400LFM) 1.5 m/s (300LFM) 14 1.0 m/s (200LFM) 0.5 m/s (100LFM) 12 10 8 6 16 14 1.0 m/s (200LFM) 0.5 m/s (100LFM) 10 8 6 4 4 2 2 0 2.0 m/s (400LFM) 1.5 m/s (300LFM) 12 0 30 35 40 45 50 55 60 65 70 75 80 85 30 35 40 45 Ambient Temperature (ºC) 22 20 20 18 18 16 Output Current (Amps) Output Current (Amps) 24 22 2.0 m/s (400LFM) 1.5 m/s (300LFM) 1.0 m/s (200LFM) 10 0.5 m/s (100LFM) 8 6 65 70 75 80 85 16 2.0 m/s (400LFM) 1.5 m/s (300LFM) 14 12 1.0 m/s (200LFM) 0.5 m/s (100LFM) 10 8 6 4 4 2 2 0 0 30 35 40 45 50 55 60 65 70 75 80 85 30 35 40 45 Ambient Temperature (ºC) 24 22 22 20 20 18 18 Output Current (Amps) 16 2.0 m/s (400LFM) 1.5 m/s (300LFM) 12 1.0 m/s (200LFM) 0.5 m/s (100LFM) 10 55 60 65 70 75 80 85 Maximum Current Temperature Derating at sea level in Longitudinal Direction Vin= 75V (air flow direction is from Vin to Vout), no baseplate 24 14 50 Ambient Temperature (ºC) Maximum Current Temperature Derating at sea level in Transverse Direction Vin= 75V (air flow direction is from Vin- to Vin+), no baseplate Output Current (Amps) 60 Maximum Current Temperature Derating at sea level in Longitudinal Direction Vin= 48V (air flow direction is from Vin to Vout), no baseplate 24 12 55 Ambient Temperature (ºC) Maximum Current Temperature Derating at sea level in Transverse Direction Vin= 48V (air flow direction is from Vin- to Vin+), no baseplate 14 50 8 6 16 14 10 1.0 m/s (200LFM) 0.5 m/s (100LFM) 8 6 4 4 2 2 0 2.0 m/s (400LFM) 1.5 m/s (300LFM) 12 0 30 35 40 45 50 55 60 65 Ambient Temperature (ºC) 70 75 80 85 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature (ºC) www.murata-ps.com/support MDC_RBE-12-20-D48.B05Δ Page 5 of 16 RBE-12/20-D48 Series Eighth-Brick 240-Watt Isolated DC/DC Converters TYPICAL PERFORMANCE DATA Maximum Current Temperature Derating at sea level in Transverse Direction Vin= 36V (air flow direction is from Vin- to Vin+), with baseplate Maximum Current Temperature Derating at sea level in Longitudinal Direction Vin= 36V (air flow direction is from Vin to Vout), with baseplate 24 24 22 22 20 20 18 16 14 2.0 m/s (400LFM) 1.5 m/s (300LFM) 12 1.0 m/s (200LFM) Output Current (Amps) Output Current (Amps) 18 0.5 m/s (100LFM) 10 8 6 16 14 2.0 m/s (400LFM) 1.5 m/s (300LFM) 12 1.0 m/s (200LFM) 8 6 4 4 2 2 0 0.5 m/s (100LFM) 10 0 30 35 40 45 50 55 60 65 70 75 80 85 30 35 40 45 Ambient Temperature (ºC) 60 65 70 75 80 85 Maximum Current Temperature Derating at sea level in Longitudinal Direction Vin= 48V (air flow direction is from Vin to Vout), with baseplate 24 24 22 22 20 20 18 18 2.0 m/s (400LFM) 1.5 m/s (300LFM) 16 14 Output Current (Amps) Output Current (Amps) 55 Ambient Temperature (ºC) Maximum Current Temperature Derating at sea level in Transverse Direction Vin= 48V (air flow direction is from Vin- to Vin+), with baseplate 1.0 m/s (200LFM) 0.5 m/s (100LFM) 12 10 8 6 2.0 m/s (400LFM) 1.5 m/s (300LFM) 16 14 1.0 m/s (200LFM) 0.5 m/s (100LFM) 12 10 8 6 4 4 2 2 0 0 30 35 40 45 50 55 60 65 70 75 80 85 30 35 40 45 Ambient Temperature (ºC) 50 55 60 65 70 75 80 85 Ambient Temperature (ºC) Maximum Current Temperature Derating at sea level in Transverse Direction Vin= 75V (air flow direction is from Vin- to Vin+), with baseplate Maximum Current Temperature Derating at sea level in Longitudinal Direction Vin= 75V (air flow direction is from Vin to Vout), with baseplate 24 24 22 22 20 20 18 16 14 2.0 m/s (400LFM) 1.5 m/s (300LFM) 12 1.0 m/s (200LFM) Output Current (Amps) 18 Output Current (Amps) 50 0.5 m/s (100LFM) 10 8 6 16 1.0 m/s (200LFM) 0.5 m/s (100LFM) 12 10 8 6 4 4 2 2 0 2.0 m/s (400LFM) 1.5 m/s (300LFM) 14 0 30 35 40 45 50 55 60 65 Ambient Temperature (ºC) 70 75 80 85 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature (ºC) www.murata-ps.com/support MDC_RBE-12-20-D48.B05Δ Page 6 of 16 RBE-12/20-D48 Series Eighth-Brick 240-Watt Isolated DC/DC Converters TYPICAL PERFORMANCE DATA On/Off Enable start up (Vin=48V, Iout=20A, Cload=470uf, Ta=+25°C) Ch2=Vout, Ch4=Enable On/Off Enable start up (Vin=48V, Iout=0A, Cload=470uf, Ta=+25°C) Ch2=Vout, Ch4=Enable On/Off Enable start up (Vin=48V, Iout=20A, Cload=4700uf, Ta=+25°C) Ch2=Vout, Ch4=Enable Start up Delay (Vin=48V, Iout=20A, Cload=470uf, Ta=+25°C) Ch1=Vin, Ch2=Vout Start up Delay (Vin=48V, Iout=0A, Cload=470uf, Ta=+25°C) Ch1=Vin, Ch2=Vout Start up Delay (Vin=48V, Iout=20A, Cload=4700uf, Ta=+25°C) Ch1=Vin, Ch2=Vout www.murata-ps.com/support MDC_RBE-12-20-D48.B05Δ Page 7 of 16 RBE-12/20-D48 Series Eighth-Brick 240-Watt Isolated DC/DC Converters TYPICAL PERFORMANCE DATA Efficiency vs. Line Voltage and Load Current @ 25°C Thermal image with hot spot at full load current with 30°C ambient; air is flowing at 100 LFM. Air is flowing across the converter from -Vin to +Vin at 48V input. Identifiable and recommended maximum value to be verified in application. 100 Efficiency (%) 95 VIN = 36V VIN = 48V VIN = 75V 90 85 80 75 70 0 5 10 15 20 25 Load C urre nt (Amps) Typical Output Voltage (Vout) Vs. Output load at +25°C Typical Output Voltage (Vout) vs. Input Voltage (Vin) at +25°C 12.2 12 12 10A 20A no load 11.6 11.4 11.8 11.6 Output Voltage/Vout Output Voltage/Vout 11.8 11.2 11 11.4 11.2 36V 48V 75V 11 10.8 10.8 10.6 10.6 Input Voltage/Vin The RBE-12/20-D48 is not designed to be operated within the shaded area. The output voltage will be fully regulated within the white area in the graph above. Operation outside of this area is not recommended for normal use. 10.4 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Load/A www.murata-ps.com/support MDC_RBE-12-20-D48.B05Δ Page 8 of 16 RBE-12/20-D48 Series Eighth-Brick 240-Watt Isolated DC/DC Converters TYPICAL PERFORMANCE DATA Typical Startup Waveform with a 4V bias voltage Typical Startup Waveform with a 8V bias voltage Output Ripple and Noise (Vin = 48V, Iout = 20A, Cload = 1uF || 10μF, Ta = +25°C) Output Ripple and Noise (Vin = 48V, Iout = 0A, Cload = 1uF || 10μF, Ta = +25°C) Output Ripple and Noise (Vin = 48V, Iout = 20A, Cload = 4700μF, Ta = +25°C) Stepload Transient Response (Vin = 48V, Cload = 470μF, Iout = 50-75-50% of Imax, 1A/μS, Ta = +25°C) www.murata-ps.com/support MDC_RBE-12-20-D48.B05Δ Page 9 of 16 RBE-12/20-D48 Series Eighth-Brick 240-Watt Isolated DC/DC Converters MECHANICAL SPECIFICATIONS (THROUGH-HOLE MOUNT) SIDE VIEW PINS 1-3,: φ0.040±0.0015(1.016±0.038) PINS 4,5: φ0.062±0.0015(1.575±0.038) L 50.80 2.000 SEE NOTE 6 50.80 2.000 1 4 15.24 0.600 15.24 0.600 22.86 0.900 2 SEE NOTE 6 3 4 15.24 0.600 15.24 0.600 3 0.005 minimum clearance between standoffs and highest component 2 1 8 22.86 0.900 0.005 minimum clearance between standoffs and highest component L PINS 1-3,: φ0.040±0.0015(1.016±0.038) PINS 4,5: φ0.062±0.0015(1.575±0.038) 10.16 0.40 OPEN FRAME 12.7 0.50 WITH BASEPLATE OPTION 8 58.4 2.30 58.4 2.30 BOTTOM PIN SIDE VIEW BOTTOM PIN SIDE VIEW RECOMMENDED FOOTPRINT (VIEW THROUGH CONVERTER) M3-6H TYP 2PL FINISHED HOLE SIZES PINS 1-3 TOP VIEW 2.32 (PER IPC-D-275, LEVEL C) CL 0.048-0.062 (PRI) (SEC) 8 1 0.46 0.92 NOTES: UNLESS OTHERWISE SPECIFIED; 1:M3 SCREW USED TO BOLT UNIT’S BASEPLATE TO OTHER SURFACES(SUCH AS HEATSINK) MUST NOT EXCEED 0.120’’(3.0mm) DEPTH BELOW THE SURFACE OF BASEPLATE 2:APPLIED TORQUE PER SCREW SHOULD NOT EXCEED 5.3In-lb(0.6Nm); 3:ALL DIMENSION ARE IN INCHES[MILIMETER]; 4:ALL TOLERANCES: ×.××in ,±0.02in(×.×mm,±0.5mm) ×.×××in ,±0.01in(×.××mm,±0.25mm) 5:COMPONENT WILL VARY BETWEEN MODELS 6:STANDARD PIN LENGTH: 0.180 Inch 7: FINISH: (ALL PINS) GOLD (5u”MIN) OVER NICKEL (50u” MIN) FOR L2 PIN LENGTH OPTION IN MODEL NAME., USE STANDARD L2 PIN WITH PIN LENGTH TO 0.145 Inch CL TOP VIEW 2 CL 3 0.100 MIN @ 1-3 FOR PIN SHOULDERS 4 1.00 FINISHED HOLE SIZES @ PINS 4 & 8 2.000 (PER IPC-D-275, LEVEL C) 0.070-0.084 IT IS RECOMMENDED THAT NO PARTS BE PLACED BENEATH CONVERTER Dimensions are in inches (mm shown for ref. only). Third Angle Projection Pin 1 2 3 INPUT/OUTPUT CONNECTIONS Pin +Vin 4 -Vout Remote On/Off 8 +Vout -Vin Tolerances (unless otherwise specified): .XX ± 0.02 (0.5) .XXX ± 0.010 (0.25) Angles ± 2˚ Components are shown for reference only and may vary between units. www.murata-ps.com/support MDC_RBE-12-20-D48.B05Δ Page 10 of 16 RBE-12/20-D48 Series Eighth-Brick 240-Watt Isolated DC/DC Converters MECHANICAL SPECIFICATIONS (SURFACE MOUNT, MSL RATING 1) 0.015 Min [0.381] [10.16] 0.40 NOTES: UNLESS OTHERWISE SPECIFIED; 1:ALL DIMENSION ARE IN INCHES[MILIMETER]; 2:ALL TOLERANCES: ×.××in ,±0.02in(×.×mm,±0.5mm) ×.×××in ,±0.01in(×.××mm,±0.25mm) 3:COMPONENT WILL VARY BETWEEN MODELS [50.80] 2.000 0.06 [1.524] Dimensions are in inches (mm shown for ref. only). Third Angle Projection Tolerances (unless otherwise specified): .XX ± 0.02 (0.5) .XXX ± 0.010 (0.25) Angles ± 2˚ 4 Components are shown for reference only and may vary between units. [22.86] 0.900 3 2 8 1 Pin 1 2 3 [58.4] 2.30 PIN SIDE VIEW 3 FEED DI R E ( U N W I N C ----- TION D) INPUT/OUTPUT CONNECTIONS Pin +Vin 4 -Vout Remote On/Off 8 +Vout -Vin PIN #1 INDICATOR AT EACH POCKET ON POCKET TAPE PIN #1 OF DC-DC CONVERTER 2.300 2.83 58.42 72.00 FEED (UNWIND) DIRECTION ------- 'ROUND' SPROCKET HOLES 5 5 1.319 33.50 'OBLONG' SPROCKET HOLES 1 4 13.0" x 72mm WIDE REEL (REF) .450 11.43 .900 22.86 ĭ7.0(0.28")MIN AREA PICK & PLACE LOCATION 1.260 32.00 NOTES: (UNLESS OTHERWISE SPECIFIED) 1. 2. 3. 4. 5. REFER TO SPECIFIC BOM FOR LIST OF PARTS NOTE ORIENTATION OF PARTS IN POCKETS APPLY MARKING LABEL (ITEM 4) AS SH0WN LEAVE THE FIRST SEVEN (7) POCKETS EMPTY, FILL THE NEXT 100 POCKETS WITH PRODUCT, AND LEAVE EIGHT (8) POCKETS MINIMUM EMPTY ON THE END OF THE REEL. PEEL FORCE OF THE COVER TAPE: THE ANGLE BETWEEN THE COVER TAPE DURING PEEL-OFF AND THE UNREELING DIRECTION SHALL BE 180 FOR A PEEL SPEED OF 39IN/MIN, THE PEEL FORCE SHALL BE 30-60 GRAMS, SEE MURATA-PS PROCEDURE A-46002. THE COVER TAPE SHALL ADHERE UNIFORMLY TO THE CARRIER (POCKET) TAPE. www.murata-ps.com/support MDC_RBE-12-20-D48.B05Δ Page 11 of 16 RBE-12/20-D48 Series Eighth-Brick 240-Watt Isolated DC/DC Converters TECHNICAL NOTES Thermal Shutdown Extended operation at excessive temperature will initiate overtemperature shutdown triggered by a temperature sensor inside the PWM controller. This operates similarly to overcurrent and short circuit mode. The inception point of the overtemperature condition depends on the average power delivered, the ambient temperature and the extent of forced cooling airflow. Thermal shutdown uses only the hiccup mode (autorestart). Start Up Considerations When power is first applied to the DC/DC converter, there is some risk of start up difficulties if you do not have both low AC and DC impedance and adequate regulation of the input source. Make sure that your source supply does not allow the instantaneous input voltage to go below the minimum voltage at all times. Use a moderate size capacitor very close to the input terminals. You may need two or more parallel capacitors. A larger electrolytic or ceramic cap supplies the surge current and a smaller parallel low-ESR ceramic cap gives low AC impedance. Remember that the input current is carried both by the wiring and the ground plane return. Make sure the ground plane uses adequate thickness copper. Run additional bus wire if necessary. Input Fusing Certain applications and/or safety agencies may require fuses at the inputs of power conversion components. Fuses should also be used when there is the possibility of sustained input voltage reversal which is not current-limited. For greatest safety, we recommend a fast blow fuse installed in the ungrounded input supply line. Input Under-Voltage Shutdown and Start-Up Threshold Under normal start-up conditions, converters will not begin to regulate properly until the rising input voltage exceeds and remains at the Start-Up Threshold Voltage (see Specifications). Once operating, converters will not turn off until the input voltage drops below the Under-Voltage Shutdown Limit. Subsequent restart will not occur until the input voltage rises again above the Start-Up Threshold. This built-in hysteresis prevents any unstable on/off operation at a single input voltage. Start-Up Time Assuming that the output current is set at the rated maximum, the Vin to Vout Start-Up Time (see Specifications) is the time interval between the point when the rising input voltage crosses the Start-Up Threshold and the fully loaded output voltage enters and remains within its specified accuracy band. Actual measured times will vary with input source impedance, external input capacitance, input voltage slew rate and final value of the input voltage as it appears at the converter. These converters include a soft start circuit to moderate the duty cycle of its PWM controller at power up, thereby limiting the input inrush current. The On/Off Remote Control interval from On command to Vout (final ±5%) assumes that the converter already has its input voltage stabilized above the Start-Up Threshold before the On command. The interval is measured from the On command until the output enters and remains within its specified accuracy band. The specification assumes that the output is fully loaded at maximum rated current. Similar conditions apply to the On to Vout regulated specification such as external load capacitance and soft start circuitry. Recommended Input Filtering The user must assure that the input source has low AC impedance to provide dynamic stability and that the input supply has little or no inductive content, including long distributed wiring to a remote power supply. The converter will operate with no additional external capacitance if these conditions are met. For best performance, we recommend installing a low-ESR capacitor immediately adjacent to the converter’s input terminals. The capacitor should be a ceramic type such as the Murata GRM32 series or a polymer type. Make sure that the input terminals do not go below the undervoltage shutdown voltage at all times. More input bulk capacitance may be added in parallel if needed. Recommended Output Filtering The converter will achieve its rated output ripple and noise with no additional external capacitor. However, the user may install more external output capacitance to reduce the ripple even further or for improved dynamic response. Again, use low-ESR ceramic (Murata GRM32 series) or polymer capacitors. Mount these close to the converter. Measure the output ripple under your load conditions. Use only as much capacitance as required to achieve your ripple and noise objectives. Excessive capacitance can make step load recovery sluggish or possibly introduce instability. Do not exceed the maximum rated output capacitance listed in the specifications. Input Ripple Current and Output Noise All models in this converter series are tested and specified for input reflected ripple current and output noise using designated external input/output components, circuits and layout as shown in the figures below. The Cbus and Lbus components simulate a typical DC voltage bus. TO OSCILLOSCOPE CURRENT PROBE +VIN VIN + – + – LBUS CBUS CIN -VIN CIN = 300μF, ESR < 700mΩ @ 100kHz CBUS = TBDμF, ESR < 100mΩ @ 100kHz LBUS = <500μH Figure 2. Measuring Input Ripple Current Minimum Output Loading Requirements All models regulate within specification and are stable under no load to full load conditions. Operation under no load might however slightly increase output ripple and noise. www.murata-ps.com/support MDC_RBE-12-20-D48.B05Δ Page 12 of 16 RBE-12/20-D48 Series Eighth-Brick 240-Watt Isolated DC/DC Converters +VOUT C1 C2 SCOPE RLOAD -VOUT C1 = 1μF C2 = 10μF LOAD 2-3 INCHES (51-76mm) FROM MODULE Figure 3. Measuring Output Ripple and Noise (PARD) Thermal Shutdown To prevent many over temperature problems and damage, these converters include thermal shutdown circuitry. If environmental conditions cause the temperature of the DC/DC’s to rise above the Operating Temperature Range up to the shutdown temperature, an on-board electronic temperature sensor will power down the unit. When the temperature decreases below the turn-on threshold, the converter will automatically restart. There is a small amount of hysteresis to prevent rapid on/off cycling. CAUTION: If you operate too close to the thermal limits, the converter may shut down suddenly without warning. Be sure to thoroughly test your application to avoid unplanned thermal shutdown. Temperature Derating Curves The graphs in this data sheet illustrate typical operation under a variety of conditions. The Derating curves show the maximum continuous ambient air temperature and decreasing maximum output current which is acceptable under increasing forced airflow measured in Linear Feet per Minute (“LFM”). Note that these are AVERAGE measurements. The converter will accept brief increases in current or reduced airflow as long as the average is not exceeded. Note that the temperatures are of the ambient airflow, not the converter itself which is obviously running at higher temperature than the outside air. Also note that “natural convection” is defined as very flow rates which are not using fan-forced airflow. Depending on the application, “natural convection” is usually about 30-65 LFM but is not equal to still air (0 LFM). Murata Power Solutions makes Characterization measurements in a closed cycle wind tunnel with calibrated airflow. We use both thermocouples and an infrared camera system to observe thermal performance. As a practical matter, it is quite difficult to insert an anemometer to precisely measure airflow in most applications. Sometimes it is possible to estimate the effective airflow if you thoroughly understand the enclosure geometry, entry/exit orifice areas and the fan flowrate specifications. CAUTION: If you exceed these Derating guidelines, the converter may have an unplanned Over Temperature shut down. Also, these graphs are all collected near Sea Level altitude. Be sure to reduce the derating for higher altitude. Output Fusing The converter is extensively protected against current, voltage and temperature extremes. However your output application circuit may need additional protection. In the extremely unlikely event of output circuit failure, excessive voltage could be applied to your circuit. Consider using an appropriate fuse in series with the output. Output Current Limiting Current limiting inception is defined as the point at which full power falls below the rated tolerance. See the Performance/Functional Specifications. Note particularly that the output current may briefly rise above its rated value in normal operation as long as the average output power is not exceeded. This enhances reliability and continued operation of your application. If the output current is too high, the converter will enter the short circuit condition. Output Short Circuit Condition When a converter is in current-limit mode, the output voltage will drop as the output current demand increases. If the output voltage drops too low (approximately 97% of nominal output voltage for most models), the PWM controller will shut down. Following a time-out period, the PWM will restart, causing the output voltage to begin rising to its appropriate value. If the short-circuit condition persists, another shutdown cycle will initiate. This rapid on/off cycling is called “hiccup mode.” The hiccup cycling reduces the average output current, thereby preventing excessive internal temperatures and/or component damage. A short circuit can be tolerated indefinitely. The “hiccup” system differs from older latching short circuit systems because you do not have to power down the converter to make it restart. The system will automatically restore operation as soon as the short circuit condition is removed. Remote On/Off Control On the input side, a remote On/Off Control can be specified with either logic type. Please refer to the Connection Diagram on page 1 for On/Off connections. Positive-logic models are enabled when the On/Off pin is left open or is pulled high to +15V with respect to –VIN. Positive-logic devices are disabled when the On/Off is grounded or brought to within a low voltage (see Specifications) with respect to –VIN. Negative-Models with negative logic are on (enabled) when the On/Off is grounded or brought to within a low voltage (see Specifications) with respect to –VIN. The device is off (disabled) when the On/Off is left open or is pulled high to +15VDC Max. with respect to –VIN. Dynamic control of the On/Off function should be able to sink the specified signal current when brought low and withstand the specified voltage when brought high. Be aware too that there is a finite time in milliseconds (see Specifications) between the time of On/Off Control activation and stable, output. This time will vary slightly with output load type and current and input conditions. Output Capacitive Load These converters do not require external capacitance added to achieve rated specifications. Users should only consider adding capacitance to reduce switching noise and/or to handle spike current load steps. Install only enough capacitance to achieve noise objectives. Excess external capacitance may cause degraded transient response and possible oscillation or instability. www.murata-ps.com/support MDC_RBE-12-20-D48.B05Δ Page 13 of 16 RBE-12/20-D48 Series Eighth-Brick 240-Watt Isolated DC/DC Converters Output OVP (Output Clamped) The RBE-12/20-D48 module incorporates circuitry to protect the output/load (Output OVP, Over Voltage Protection) by effectively clamping the output voltage to a maximum of 13.5V under certain fault conditions. The initial output voltage is set at the factory for an accuracy of ±1.5%, and is regulated over line load and temperature using a closed loop feedback system. In the event of a failure that causes the module to operate open loop (failure in the control loop), the output voltage will be determined by the input voltage/duty cycle of the voltage conversion (Pulse Width Modulation) circuit. For example, when the input voltage is at 36V, the duty cycle is D1; when the input voltage is at 75V, the maximum duty cycle is D1/2; this change in duty cycle compensates Vout for Vin changes. As Vin continues to increase above 75V the voltage at Vout is clamped because maximum duty cycle has been reached. The output voltage is always proportional to Vin*Duty in a buck derived topology. Figure 4 is the test waveform for the RBE-12/20-D48 module when its feedback loop is open, simulating a loop failure. Channel 1 is the input voltage and Channel 2 it the output voltage. When the input voltage climbs from 48Vdc to 100Vdc, the output voltage remains stable. Through-Hole Soldering Guidelines Murata Power Solutions recommends the specifications below when installing these converters. These specifications vary depending on the solder type. Exceeding these specifications may cause damage to the product. Your production environment may differ; therefore please thoroughly review these guidelines with your process engineers. Figure 4. Test Waveform with Feedback Loop Open SMT Reflow Soldering Guidelines The surface-mount reflow solder profile shown below is suitable for SAC305 type lead-free solders. This graph should be used only as a guideline. Many other factors influence the success of SMT reflow soldering. Since your production environment may differ, please thoroughly review these guidelines with your process engineers. Wave Solder Operations for through-hole mounted products (THMT) For Sn/Ag/Cu based solders: Maximum Preheat Temperature Maximum Pot Temperature Maximum Solder Dwell Time 115ºC. 270ºC. 7 seconds For Sn/Pb based solders: Maximum Preheat Temperature Maximum Pot Temperature Maximum Solder Dwell Time 105ºC. 250ºC. 6 seconds www.murata-ps.com/support MDC_RBE-12-20-D48.B05Δ Page 14 of 16 RBE-12/20-D48 Series Eighth-Brick 240-Watt Isolated DC/DC Converters Emissions Performance Murata Power Solutions measures its products for radio frequency emissions against the EN 55022 and CISPR 22 standards. Passive resistance loads are employed and the output is set to the maximum voltage. If you set up your own emissions testing, make sure the output load is rated at continuous power while doing the tests. [3] Conducted Emissions Test Results The recommended external input and output capacitors (if required) are included. Please refer to the fundamental switching frequency. All of this information is listed in the Product Specifications. An external discrete filter is installed and the circuit diagram is shown below. VCC RTN L1 C1 + C7 C2 C3 + DC/DC -48V C6 GND C4 C5 GND Figure 5. Conducted Emissions Test Circuit [1] Conducted Emissions Parts List Item Reference 1 C1, C7 2 C2 3 L1 4 C4, C5 5 6 C6 C3 Graph 1. Conducted emissions performance, Positive Line, CISPR 22, Class A, full load Description SMD -100V-1000nFX7R-1210 SMD -100V-100nF-±10%X7R-1206 -809uH-±25%-9.7A-R5K28*26*12.7mm 0.1U/250V, 13*12*6-0.6-10mm 4700 μF 220 μF [2] Conducted Emissions Test Equipment Used Hewlett Packard HP8594L Spectrum Analyzer – S/N 3827A00153 2Line V-networks LS1-15V 50Ω /50Uh Line Impedance Stabilization Network Graph 2. Conducted emissions performance, Negative Line, CISPR 22, Class A, full load [4] Layout Recommendations Most applications can use the filtering which is already installed inside the converter or with the addition of the recommended external capacitors. For greater emissions suppression, consider additional filter components and/or shielding. Emissions performance will depend on the user’s PC board layout, the chassis shielding environment and choice of external components. Please refer to Application Note GEAN02 for further discussion. Since many factors affect both the amplitude and spectra of emissions, we recommend using an engineer who is experienced at emissions suppression. www.murata-ps.com/support MDC_RBE-12-20-D48.B05Δ Page 15 of 16 RBE-12/20-D48 Series Eighth-Brick 240-Watt Isolated DC/DC Converters Vertical Wind Tunnel IR Transparent optical window Unit under test (UUT) Variable speed fan The IR camera monitors the thermal performance of the Unit Under Test (UUT) under static steady-state conditions. A special optical port is used which is transparent to infrared wavelengths. IR Video Camera Heating element Precision low-rate anemometer 3” below UUT Ambient temperature sensor Airflow collimator Figure 6. Vertical Wind Tunnel Murata Power Solutions, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A. ISO 9001 and 14001 REGISTERED Murata Power Solutions employs a computer controlled custom-designed closed loop vertical wind tunnel, infrared video camera system, and test instrumentation for accurate airflow and heat dissipation analysis of power products. The system includes a precision low flow-rate anemometer, variable speed fan, power supply input and load controls, temperature gauges, and adjustable heating element. Both through-hole and surface mount converters are soldered down to a 10”x 10” host carrier board for realistic heat absorption and spreading. Both longitudinal and transverse airflow studies are possible by rotation of this carrier board since there are often significant differences in the heat dissipation in the two airflow directions. The combination of adjustable airflow, adjustable ambient heat, and adjustable Input/Output currents and voltages mean that a very wide range of measurement conditions can be studied. The collimator reduces the amount of turbulence adjacent to the UUT by minimizing airflow turbulence. Such turbulence influences the effective heat transfer characteristics and gives false readings. Excess turbulence removes more heat from some surfaces and less heat from others, possibly causing uneven overheating. Both sides of the UUT are studied since there are different thermal gradients on each side. The adjustable heating element and fan, built-in temperature gauges, and no-contact IR camera mean that power supplies are tested in real-world conditions. This product is subject to the following operating requirements and the Life and Safety Critical Application Sales Policy: Refer to: http://www.murata-ps.com/requirements/ Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change without notice. © 2016 Murata Power Solutions, Inc. www.murata-ps.com/support MDC_RBE-12-20-D48.B05Δ Page 16 of 16