TWR A-Series www.murata-ps.com 20W, Triple Output DC-DC Converters Typical unit Among the three families of triple-output DC/DC converters in MPS’s A-Series, the 20W 2" x 2" devices are distinguished by their unique “power-sharing” architecture. This feature enables devices to deliver the full 20 Watts of output power under a variety of output-loading conditions. FEATURES PRODUCT OVERVIEW Low cost! Highly reliable! Each unit’s primary +5V output can source any current up to 3 Amps (primary power = 15W); while its auxiliary ±12/15V outputs can source currents up to ±500mA (auxiliary power = 12/15W). Devices deliver any combination of primary plus auxiliary power as long as the total output power does not exceed 20 Watts. This feature enables designers to select a single device to fulfill any number of different requirements. As members of MPS’s new A-Series, the 20W triples exhibit both low cost and outstanding long-term reliability. Their design combines straightforward circuit topologies, the newest components, proven SMT-on-pcb construction methods, and highly repeatable automatic-assembly techniques. Their superior Full 20 Watts output power Power “user-allocated” among outputs Proven SMT-on-pcb construction Qual tested; HALT tested; EMC tested Output voltages: +5V/±12V or +5V/±15V Ultra-wide input voltage ranges: 9-36V or 18-75V Designed to meet UL1950/EN60950. BASIC insulation (all 48VIN models) CE mark available (75V input models) Small packages, 2" x 2" x 0.45" Fully isolated, 1500Vdc guaranteed Guaranteed efficiencies to 82% –40 to +100°C operating temperature Modifications and customs for OEM’s durability is substantiated by a rigorous in-house qualification program that includes HALT (Highly Accelerated Life Testing). Each device has a +5V primary output and either ±12V or ±15V auxiliary outputs. “D12A” models achieve fully rated performance with inputs ranging from 9 to 36 Volts. “D48A” models operate over an input range of 18-75 Volts. These full-featured triples have non-latching output current limiting, input overvoltage shutdown, input reverse-polarity protection, and output overvoltage clamping to protect both the power converters and their loads. SIMPLIFIED SCHEMATIC +5V +V IN (1) (6) –12V (–15V) – V IN (8) (2) ON /O FF CONTROL +12V (+15V) (5) PWM CONTROLLER (4) COMMON (7) OPTO ISOLAT ION ERROR AMPLIFIER For full details go to www.murata-ps.com/rohs www.murata-ps.com/support MDC_TWR20W.E02 Page 1 of 8 TWR A-Series 20W, Triple Output DC-DC Converters PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE Output R/N (mVp-p) Regulation VOUT IOUT Model Family (V) (mA) Typ. Max. Line Load Input VIN Nom. (Volts) Range (Volts) IIN (mA) Min. Typ. Package (Case/ Pinout) Efficiency TWR-5/3000-12/500-D12A-C +5 ±12 3000 ±500 50 75 100 125 ±0.2% ±0.5% ±0.5% ±6% 12 9-36 20/1004 81% 82% C4, P13 TWR-5/3000-12/500-D48A-C +5 ±12 3000 ±500 50 75 100 125 ±1% ±1% ±2% ±5% 48 18-75 40/559 82% 83% C4, P13 TWR-5/3000-15/500-D12A-C +5 ±15 3000 ±500 50 75 100 150 ±0.1% ±0.5% ±0.25% ±4% 12 9-36 40/1173 81% 82% C4, P13 TWR-5/3000-15/500-D48A-C +5 ±15 3000 ±500 50 75 100 150 ±1% ±1% ±2% ±5% 48 18-75 40/559 81% 82% C4, P13 Typical @ TA = +25°C under nominal line voltage and full-load conditions unless otherwise noted. For the +5V output, listed spec applies over the 10% to 100% load range. For the ±12/15V outputs, For testing and specification purposes, “full load” is defined as 2.75A on the primary +5V output and listed spec applies for balanced loads over the 20% to 100% load range. ±250/200mA on the auxiliary ±12/15V outputs. This corresponds to a total output power of 19.75W. Nominal line voltage, no-load/full-load conditions. Ripple/Noise (R/N) measured over a 20MHz bandwidth. PART NUMBER STRUCTURE MECHANICAL SPECIFICATIONS T WR - 5 / 3000 - 15 / 500 - D48 A - C 2.00 (50.80) Output Configuration: T = Triple RoHS-6 compliant* A-Series High Reliability Wide Range Input Input Voltage Range: Nominal Primary Output: D12 = 9-36V (12V nominal) Voltage (+5V) D48 = 18-75V (48V nominal) Maximum Auxilliary Output: Maximum Primary Output Current in mA Currents in mA from each output Nominal Auxiliary Output: * Contact Murata Voltages (±12 or ±15V) Power Solutions for availability. ME T A L C A S E 0.45 (11.43) Case C4 IN S U LA T E D B A S E 0.040 ±0.002 D IA . (1.016 ±0.051) 0.20 MIN (5.08) 1.800 (45.72) 0.10 (2.54) 5 0.200 (5.08) 6 TEMPERATURE DERATING 1 2 20 7 0.400 (10.16) 19 1.200 (30.48) 3 E Q . SP. @ 0.400 ( 10.16) 2.00 (50.80) 4 18 17 8 16 0.100 (2.54) 15 0.40 (10.16) B O T T O M V IE W 14 Output Power (Watts) 13 12 11 INPUT/OUTPUT CONNECTIONS 10 9 Pin Function P13 8 1 +Input 7 2 -Input 5 3 No Pin 4 4 On/Off Control 3 5 +12V/15V Output 6 +5V Output 6 2 1 0 –40 0 40 45 50 55 60 65 70 75 80 85 90 95 100 7 Common 8 -12V/15V Output Note: For “D12A” models, the case is connected to pin 2 (–VIN). For “D48A” models, the case is connected to pin 1 (+VIN). Dimensions are in inches (mm) Ambient Temperature (°C) www.murata-ps.com/support MDC_TWR20W.E02 Page 2 of 8 TWR A-Series 20W, Triple Output DC-DC Converters Performance/Functional Specifications Typical @ TA = +25°C under nominal line voltage and “full-load” conditions, unless noted. Input Input Voltage Range: D12A Models D48A Models 9-36 Volts (24V nominal) 18-75 Volts (48V nominal) Input Current See Ordering Guide Input Voltage: “D12” Models “D48” Models Input Filter Type Pi Input Reverse-Polarity Protection Overvoltage Shutdown: D12A Models D48A Models 40 Volts 80 Volts Reverse-Polarity Protection Yes (Instantaneous, 6A maximum) On/Off (Sync.) Control (Pin 4) TTL high = off, low (or open) = on Output Overvoltage Protection +5V Output ±12V Outputs ±15V Outputs Absolute Maximum Ratings Output Total Output Power 20W max., sum of all outputs VOUT Accuracy (50% loads): +5V Output ±12V or ±15V Outputs ±1% ±3% Temperature Coefficient ±0.02% per °C Ripple/Noise (20MHz BW) See Ordering Guide Line/Load Regulation See Ordering Guide Efficiency See Ordering Guide Isolation Voltage 1500Vdc, minimum Isolation Capacitance 500pF Current Limiting Power down to restart Short Circuit Protection at 25ºC 5 min. max, 5V output 30 sec max.12/15V outputs Overvoltage Protection back Zener/transorb clamps, magnetic feed- Dynamic Characteristics Transient Response (50% load step) 300μsec max. to ±2% of final value Switching Frequency 165kHz (±15kHz) Environmental Operating Temperature (ambient): Without Derating With Derating –40 to +55°C to +100°C (See Derating Curve) Storage Temperature –40 to +105°C Physical Dimensions 2" x 2" x 0.45" (51 x 51 x 11.4mm) Shielding 5-sided Case Connections: D12A Models D48A Models Pin 2 (–VIN) Pin 1 (+VIN) Case Material Corrosion resistant steel with non-conductive, epoxy-based, black enamel finish and plastic baseplate Pin Material Copper alloy with gold plate over nickel underplate Weight 2.7 ounces (77 grams) These converters require 10% min. loading on their primary output and 20% min. loading on their auxiliary outputs to maintain specified regulation. Operation under no-load conditions will not damage the devices; however they may not meet all listed specifications. For testing and specification purposes, “full load” is defined as 2.75A on the primary +5V output and ±250/200mA on the auxiliary ±12/15V outputs. This corresponds to a total output power of 19.75W. Application-specific internal input/output filtering can be recommended or perhaps added internally upon request. Contact MPS Applications Engineering for details. Applying a voltage to the Control pin when no input power is applied to the converter can cause permanent damage to the converter. D48A models have BASIC, D12A models have Functional insulation.Devices can be screened or modified for higher guaranteed isolation voltages. Contact MPS Applications Engineering for details. To avoid damage to the surface finish, please do not use certain cleaning agents such as Vigon. Contact Murata Power Solutions for information. 44 Volts 88 Volts Current must be <6A. Brief duration only. Fusing recommended. 6.8 Volts, limited duration ±15 Volts, limited duration ±18 Volts, limited duration Output Current Current limited. Max. currents are model dependent. Storage Temperature –40 to +105°C Lead Temperature (soldering, 10 sec.) +300°C These are stress ratings. Exposure of devices to 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. Technical Notes Filtering and Noise Reduction All A-Series TWR 20 Watt DC/DC Converters achieve their rated ripple and noise specifications without the use of external input/output capacitors. In critical applications, input/output noise may be further reduced by installing electrolytic capacitors across the input terminals and/or low-ESR tantalum or electrolytic capacitors across the output terminals. Output capacitors should be connected between their respective output pin (pin 5, 6 or 8) and Common (pin 7). The caps should be located as close to the power converters as possible. Typical values are listed below. In many applications, using values greater than those listed will yield better results. To Reduce Input Ripple D12A Models 20μF, 50V D48A Models 10μF, 100V To Reduce Output Ripple +5V Output 47μF, 10V, Low ESR ±12/15V Outputs 33μF, 20V, Low ESR In critical, space-sensitive applications, MPS may be able to tailor the internal input/output filtering of these units to meet your specific requirements. Contact our Applications Engineering Group for additional details. Input Fusing Certain applications and/or safety agencies may require the installation of fuses at the inputs of power conversion components. For MPS A-Series TWR 20 Watt DC/DC Converters, you should use slow-blow type fuses with values no greater than 4A for “D12A” models and 2A for “D48A” models. On/Off Control The On/Off Control pin (pin 4) may be used for remote on/off operation. A TTL logic high (+2 to +5 Volts, 250μA max.) applied to pin 4 disables the converter. A TTL logic low (0 to +0.8 Volts, 70μA max.), or no connection, enables the converter. Control voltages should be referenced to pin 2 (–Input). Applying a voltage to the Control pin when no input power is applied to the converter can cause permanent damage to the converter. www.murata-ps.com/support MDC_TWR20W.E02 Page 3 of 8 TWR A-Series 20W, Triple Output DC-DC Converters Typical Performance Curves (TA = +25°C) The performance curves below were derived from actual test data for a single model number (TWR-5/3000-12/250-D48). Since all devices in this series have the same circuit architecture, the performance curves are representative for all devices. Efficiency vs. +5V Output Loading (±12V outputs loaded @ ±250mA) Efficiency vs. Input Voltage (+5V output loaded @ 2.75A, ±12V outputs loaded @ ±250mA) 84.0 88 83.5 86 83.0 84 82.5 82 Efficiency (%) Efficiency (%) V IN = 18V 82.0 81.5 V IN = 48V 80 78 76 81.0 V IN = 72V 74 80.5 72 80.0 18 24 36 48 60 0.25 72 0.75 1.25 Input Voltage (V) 2.25 2.75 Efficiency vs. ±12V Output Loading (+5V output loaded @ 2.75A) Efficiency vs. ±12V Output Loading (+5V output loaded @ 0.55A) 84 89 V IN = 18V V IN = 18V 83 86 82 83 V IN = 48V V IN = 48V 80 Efficiency (%) Efficiency (%) 1.75 +5V Output Current (A) 77 74 81 80 79 V IN = 72V 78 71 V IN = 72V 77 68 76 65 25 50 100 150 ±12V Output Currents (±mA) 200 250 25 50 100 150 200 250 ±12V Output Currents (±mA) www.murata-ps.com/support MDC_TWR20W.E02 Page 4 of 8 TWR A-Series 20W, Triple Output DC-DC Converters +5V Output Load Regulation (±12V outputs loaded @ ±25mA) +5V Output Load Regulation (±12V outputs loaded @ ±250mA) +5.00 +5.02 +4.99 +5.01 V IN = 18 V V IN = 18V +5.00 V IN = 48V +5V Output Voltage (V) +5V Output Voltage (V) +4.98 +4.97 +4.96 V IN = 72V +4.95 +4.94 +4.93 V IN = 48 V +4.99 +4.98 +4.97 V IN = 72 V +4.96 +4.95 +4.92 +4.94 0.25 0.75 1.25 1.75 2.25 0.25 2.75 0.75 +5V Output Current (A) 1.25 1.75 2.25 2.75 +5V Output Current (A) +12V Output Load Regulation (+5V output loaded @ 0.55A) +12V Output Load Regulation (+5V outputs loaded @ 2.75A) +12.35 +13.20 +12.25 +13.05 +12.15 +12V Output Voltage (V) +12V Output Voltage (V) V IN = 48 V V IN = 72 V +12.05 +11.95 +11.85 +11.75 +12.90 V IN = 72 V +12.75 +12.60 +12.45 +12.30 V IN = 18 V +11.65 +12.15 +11.55 +12.00 V IN = 48 V V IN = 18 V 25 50 100 150 200 250 25 50 100 ±12V Output Currents (±mA) –11.60 150 200 250 200 250 ±12V Output Currents (±mA) -12V Output Load Regulation (+5V output loaded @ 2.75A) -12V Output Load Regulation (+5V output loaded @ 0.55A) –12.00 V IN = 48 V V IN = 18 V –11.70 –12.15 V IN = 18 V -12V Output Voltage (V) -12V Output Voltage (V) –11.80 –11.90 –12.00 –12.10 V IN = 48 V –12.20 –12.30 –12.45 V IN = 72 V –12.60 –12.75 –12.90 V IN = 72 V –12.30 –13.05 –12.40 –13.20 25 50 100 150 ±12V Output Currents (±mA) 200 250 25 50 100 150 ±12V Output Currents (±mA) www.murata-ps.com/support MDC_TWR20W.E02 Page 5 of 8 TWR A-Series 20W, Triple Output DC-DC Converters LINE REGULATION EMI RADIATED EMISSIONS If you’re designing with EMC in mind, note that all of MPS’s TWR 20 Watt A-Series DC/DC Converters have been characterized for radiated and conducted emissions in our new EMI/EMC laboratory. Testing is conducted in an EMCO 5305 GTEM test cell utilizing EMCO automated EMC test software. Radiated emissions are tested to the limits of FCC Part 15, Class B and CISPR 22 (EN 55022) Class B. Correlation to other specifications can be supplied upon request. Radiated emissions plots to FCC and CISPR 22 for model TWR-5/3000-15/500-D12A appear below. Its performance is typical of all models in the Series. Published EMC test reports are available for each model number. Contact MPS’s Applications Engineering for details. +5V Line Regulation (+5V output loaded @ 2.75A, ±12V outputs loaded @ ±250mA)) +5.010 +5V Output Voltage (V) +5.005 +5.000 +4.995 +4.990 +4.985 +4.980 +4.975 18 24 36 48 60 TWR-5/3000-15/500-D12A Radiated Emissions FCC Part 15 Class B, 3 Meters Converter Output = +5Vdc @ 2.7A and ±15Vdc @ ±450mA 72 Input Voltage (V) 80 70 +12V Line Regulation (+5V output loaded @ 2.75A, ±12V outputs loaded @ ±250mA)) 60 FCC Class B Li mi t Radiat ed Emissions (dBμV/M) +12.150 +12V Output Voltage (V) +12.125 +12.100 +12.075 +12.050 50 40 30 20 10 0 +12.025 Radiated Emissi ons –10 +12.000 –20 1000 100 +11.975 18 24 36 48 60 Frequency (MHz ) 72 Input Voltage (V) TWR-5/3000-15/500-D12A Radiated Emissions EN 55022 Class B, 10 Meters Converter Output = +5Vdc @ 2.7A and ±15Vdc @ ±450mA -12V Line Regulation (+5V output loaded @ 2.75A, ±12V outputs loaded @ ±250mA)) 80 –12.025 70 –12.050 50 Radiated Emissions (dBμV/M) -12V Output Voltage (V) 60 –12.075 –12.100 –12.125 –12.150 –12.175 EN 55022 Class B Li mi t 40 30 20 10 0 –12.200 Radiated Emissions 18 24 36 48 Input Voltage (V) 60 72 –10 –20 1000 100 Frequency (MHz) www.murata-ps.com/support MDC_TWR20W.E02 Page 6 of 8 TWR A-Series 20W, Triple Output DC-DC Converters Quality and Reliability stresses are continually stepped up until products eventually fail. After corrective actions and/or design changes, stresses are stepped up again and the cycle is repeated until the “fundamental limit of the technology” is determined. The A-Series are the first DC/DC Converters to emerge from MPS’s new, company-wide approach to designing and manufacturing the most reliable power converters available. The five-pronged program draws our Quality Assurance function into all aspects of new-product design, development, characterization, qualification and manufacturing. MPS has invested in a Qualmark OVS-1 HALT tester capable of applying voltage and temperature extremes as well as 6-axis, linear and rotational, random vibration. A typical HALT profile (shown above) consists of thermal cycling (–55 to +125°C, 30°C/minute) and simultaneous, gradually increasing, random longitudinal and rotational vibration up to 20G’s with load cycling and applied-voltage extremes added as desired. Many devices in MPS’s A-Series could not be made to fail prior to reaching either the limits of the HALT chamber or some previously known physical limit of the device. We also use the HALT chamber and its ability to rapidly cool devices to verify their “cold-start” capabilities. Design for Reliability Design for Reliability is woven throughout our multi-phased, new-productdevelopment process. Design-for-reliability practices are fully documented and begin early in the new-product development cycle with the following goals: 1. To work from an approved components/vendors list ensuring the use of reliable components and the rigorous qualification of new components. 2. To design with safety margins by adhering to a strict set of derating guidelines and performing theoretical worst-case analyses. 3. To locate potential design weaknesses early in the product-development cycle by using extensive HALT (Highly Accelerated Life Testing). 4. To prove that early design improvements are effective by employing a thorough FRACA (Failure Reporting Analysis and Corrective Action) system. Qualification For each new product, electrical performance is verified via a comprehensive characterization process and long-term reliability is confirmed via a rigorous qualification procedure. The qual procedure includes such strenuous tests as thermal shock and 500 hour life. Qual testing is summarized below. HALT Testing Qualification Testing The goal of the accelerated-stress techniques used by MPS is to force device maturity, in a short period of time, by exposing devices to excessive levels of “every stimulus of potential value.” We use HALT (Highly Accelerated Life Testing) repeatedly during the design and early manufacturing phases to detect potential electrical and mechanical design weaknesses that could result in possible future field failures. During HALT, prototype and pre-production DC/DC converters are subjected to progressively higher stress levels induced by thermal cycling, rate of temperature change, vibration, power cycling, product-specific stresses (such as dc voltage variation) and combined environments. The stresses are not meant to simulate field environments but to expose any weaknesses in a product’s electro/mechanical design and/or assembly processes. The goal of HALT is to make products fail so that device weaknesses can be analyzed and strengthened as appropriate. Applied 40 20 20 0 –20 –40 10 20 30 40 50 60 Test Ti me (minutes) 70 80 90 Random Vibration (G's) Temperature (°C) 60 0 High Temperature Storage Max. rated temp., 1,000 hours Thermal Shock 10 cycles, –55 to +125°C Temperature/Humidity +85°C, 85% humidity, 48 hours Lead Integrity MPS in-house procedure Life Test +70°C, 500 hours* Marking Permanency MPS in-house procedure End Point Electrical Tests Per product specification In-Line Process Controls and Screening Typical HALT Profile 40 Method/Comments MPS in-house procedure * Interim electrical test at 200 hours. 100 80 Qualification Test HALT A combination of statistical sampling and 100% inspection techniques keeps our assembly line under constant control. Parameters such as solder-paste thickness, component placement, cleanliness, etc. are statistically sampled, charted and fine tuned as necessary. Visual inspections are performed by trained operators after pick-and-place, soldering and cleaning operations. Units are 100% electrically tested prior to potting. All devices are temperature cycled, burned-in, hi-pot tested and final-electrical tested prior to external visual examination, packing and shipping. Rapid Response to Problems MPS employs an outstanding corrective-action system to immediately address any detected shortcomings in either products or processes. Whenever our assembly, quality or engineering personnel spot a product/process problem, or if a product is returned with a potential defect, we immediately perform a detailed failure analysis and, if necessary, undertake corrective actions. Over time, this system has helped refine our assembly operation to yield one of the lowest product defect rates in the industry. www.murata-ps.com/support MDC_TWR20W.E02 Page 7 of 8 TWR A-Series 20W, Triple Output DC-DC Converters 20 Watt Converter Operational Details There are several operational details of the 20W TWR series to be aware of when applying these converters. 20 Watts maximum power The total maximum power for all outputs is 20 Watts. This is the sum of each separate output. Any one output may achieve its maximum power as long as the sum of all outputs for the whole converter does not exceed 20 Watts. Time limits on short circuits The 5V output will tolerate 5 minutes maximum short circuit time at +25 deg.C. For the 12/15V outputs, short ciruits must limit to 30 seconds at +25 deg.C. Failure to remove the short circuits within these time limits may damage the converter or cause permanent operational changes. Higher ambient temperatures require reduced short circuit times. As long as shorts or overcurrents are removed within these time limits, the outputs will automatically recover to normal operation. For example, using model TWR-5/3000-15/500-D12A, if the maximum power is drawn from the two ±15 Volt supplies, this produces 15 Watts (7.5 W plus 7.5 W) total power. The 5V output may then deliver 5 Watts maximum (not 15W) so that the total converter power is 7.5W+7.5W+5W=20W. As a practical matter, since it is difficult to control short circuit duration, make sure that the application is highly unlikely to cause a short circuit or the input is disconnected by means of a circuit breaker or fuse. Regulation Differences Between Outputs The three outputs share a common ground return which is fully isolated from the primary input side but not between each other. Therefore do not apply the outputs to applications which require isolation between the 5V and 12/15V sections. Looking at the Schematic diagram, observe that magnetic energy driven from the primary side affects all three outputs simultaneously since they share a common transformer in combination a with magnetically coupled output inductor. We see that the regulation feedback is derived directly from the 5 Volt output and indirectly from the 12/15V outputs. Increasing current on the 12/15V outputs absorbs magnetic energy driving the 5V output therefore reducing the 5V output voltage. Regulation compensates for this drop in output voltage but not to the same extent as the 5V output regulation. The Three Outputs are not isolated from each other Short-circuit Conditions Because of the interconnected regulation and common transformer, a short circuit on one output will cause a voltage reduction on the remaining unshorted outputs. This effect is more pronounced for the 5V superior output vs. the 12/15V subordinate outputs. That is, a 5V short essentially places the PWM controller in power-limit mode whereas a 12/15V short may leave some partial power available on the remaining outputs. Murata Power Solutions, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A. ISO 9001 and 14001 REGISTERED 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. © 2015 Murata Power Solutions, Inc. www.murata-ps.com/support MDC_TWR20W.E02 Page 8 of 8