Series Isolated, High-Density, Eighth-Brick 100W DC/DC Converters
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Series
Isolated, High-Density, Eighth-Brick 100W DC/DC Converters
RoHS compliant Industry standard eighth-brick pinout package Outputs from 1.5V 100W profile 0.4" height with 0.9" 2.3" outline dimensions input range (48V nominal) Fully isolated, 2250 (BASIC) insulation Outstanding thermal performance derating Extensive self-protection short circuit features with output reverse conduction On/Off control, trim sense functions Interleaved synchronous rectification yields high efficiency over Fully protected against temperature voltage limits Designed meet UL/EN/IEC 60950-1 CAN/CSA C22.2 60950-1 safety approvals SIMPLIFIED BLOCK DIAGRAM
+VIN
Typical unit
efficient, fully isolated power smallest space, open frame DC/DC converter series industry-standard "eighth brick" outline dimensions mounting pins quarter-brick pinout).
PRODUCT OVERVIEW
Units offered with fixed output voltages from Volts currents Amps. UCEs operate over wide temperature range degrees Celsius moderate airflow) with full rated power. Interleaved synchronous rectifier topology yields excellent efficiency over reverse output conduction. UCE's achieve these impressive mechanical environmental specs while delivering excellent electrical performance through-hole package. Overall noise typically pk-pk (low voltage models) with fast step response. These converters offer tight output regulation high stability even with load. unit fully protected against input undervoltage, output overcurrent short circuit. on-board temperature sensor shuts down converter thermal limits reached. "Hiccup" output protection automatically restarts converter when fault removed. convenient remote On/Off control input enables phased startup shutdown multi-voltage applications. compensate longer wiring retain output voltage accuracy load, UCEs employ Sense input dynamically correct ohmic losses. trim input connected user's adjustment potentiometer trim resistors output voltage calibration. will tolerate substantial capacitive loading bypass-cap applications. UCEs include industry-standard safety certifications BASIC insulation provides input/output isolation 2250V. Radiation emission testing performed widely-accepted standards.
+SENSE +VOUT
SWITCH CONTROL -VOUT
-VIN PULSE TRANSFORMER CONTROLLER OPTO ISOLATION
INPUT UNDERVOLTAGE, INPUT OVERVOLTAGE, OUTPUT OVERVOLTAGE COMPARATORS REFERENCE ERROR
-SENSE
VOUT TRIM
REMOTE ON/OFF CONTROL
Typical topology shown.
Figure Simplified Block Diagram
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Series
Isolated, High-Density, Eighth-Brick 100W DC/DC Converters
PERFORMANCE SPECIFICATIONS ORDERING GUIDE Output VOUT
Input Regulation (max.) Line Load
±0.15%
Model Family
UCE-1.2/40-D48N-C UCE-1.5/20-D48N-C UCE-1.5/40-D48N-C UCE-1.8/30-D48N-C UCE-2.5/20-D48N-C UCE-2.5/40-D48N-C UCE-3.3/15-D48N-C UCE-3.3/30-D48N-C UCE-5/10-D48N-C UCE-5/20-D48N-C UCE-12/4.2-D48N-C UCE-12/8.3-D48N-C
IOUT
Power
49.5 50.4 99.6
Ripple Noise (mVp-p) Typ. Max.
Nom. Range
IIN, load (mA)
IIN, full load
Efficiency Min. Typ.
Package Case Pinout
Please contact Murata Power Solutions further information. ±0.3% 36-75 0.72 Please contact Murata Power Solutions further information. ±0.125% ±0.25% 1.28
±0.125% ±0.125% ±0.1% ±0.125% ±0.25% 36-75 1.14
Please contact Murata Power Solutions further information. ±0.25% 1.15 ±0.2% 2.27
±0.25% 36-75 1.15 1.14 2.31
90.5%
Please contact Murata Power Solutions further information.
Please contact Murata Power Solutions further info.
±0.125%
±0.25%
Please refer model number structure additional ordering part numbers options
PART NUMBER STRUCTURE
Output Configuration:
Unipolar/Single
Eighth-Brick Package
RoHS Hazardous Materials compliance RoHS6 (does claim RoHS exemption 7b-lead solder), standard RoHS5 (with lead), optional, special quantity order Length Option (Through-hole packages only) Blank Standard length 0.180 inches (4.6mm) length 0.110 inches (2.79mm)* length 0.145 inches (3.68mm)* Special quantity order required. Conformal coating (optional) Blank coating, standard Coating added, optional, special quantity order Baseplate (optional, available some models) Blank baseplate, standard Baseplate installed, optional, special quantity order On/Off Control Polarity Negative polarity, standard Positive polarity, optional
Note: Some model combinations available. Contact Murata Power Solutions availability.
Nominal Output Voltage
Maximum Rated Output
Current Amps
Input Voltage Range:
36-75V, nominal
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Series
Isolated, High-Density, Eighth-Brick 100W DC/DC Converters
SPECIFICATIONS
INPUT CHARACTERISTICS Remote On/Off Control Under- Reflected Start-up voltage (back) Internal Reverse threshold Output ShutRipple Line Standby Input Filter Polarity Positive Logic Negative Logic Inrush Min. down Current Transient Short (VIN=min.) Mode Type Protection Current Model Model (mA) Circuit (mA) (mA) Suffix Suffix A2sec (mA) 32.5 31.5 0.97 1.72 1.53 1.54 3.06 1.53 3.00 1.52 3.07
Model Family
UCE-1.5/20-D48 UCE-1.8/30-D48 UCE-2.5/20-D48 UCE-3.3/15-D48 UCE-3.3/30-D48 UCE-5/10-D48 UCE-5/20-D48 UCE-12/4.2-D48 UCE-12/8.3-D48
1-10, model dependent notes
34.5
10-30, model dependent
0.05 A2sec
50-150, model dependent
OFF=Ground OFF=open max. +2.5V ON=open +15V max. +3.5 +15V ON=Ground max. +0.8V max.
OUTPUT CHARACTERISTICS Capacitive Loading Max. <0.02 Max. resistive load Adjustment Temperature Range Coefficient 10,000 10,000 10,000 10,000 10,000 1000 10,000 1000 1000 Current Limit Inception Vout, after warmup 24.5 min.
Model Family
VOUT Accuracy Load VNOM
Minimum Loading
Remote Ripple/ Sense Noise Compen- Line/Load sation bandwidth) Regulation
Efficiency
UCE-1.5/20-D48 UCE-1.8/30-D48 UCE-2.5/20-D48 UCE-3.3/15-D48 UCE-3.3/30-D48 UCE-5/10-D48 UCE-5/20-D48 UCE-12/4.2-D48 UCE-12/8.3-D48
+10% Vnom.
±0.02% Vout range
minimum load
+10%
ordering guide
ISOLATION CHARACTERISTICS Input Output Min. Input baseplate Min. Baseplate output Min. Isolation Resistance Isolation Capacitance
Model Family UCE-1.5/20-D48 UCE-1.8/30-D48
Isolation Safety Rating
UCE-2.5/20-D48
UCE-3.3/15-D48 UCE-3.3/30-D48 2250 1500 1500 1000
Basic Insulation
UCE-5/10-D48 UCE-5/20-D48
UCE-12/4.2-D48 UCE-12/8.3-D48
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SPECIFICATIONS, CONTINUED
MISCELLANEOUS CHARACTERISTICS Overvoltage Protection12 Operating Storage Thermal Short Temperature Protection/ Circuit magnetic Short Circuit Relative Temperature Range Shutdown Current feedback Protection Short Circuit Humidity derating) (°C) Method Duration16 (non-condensing) 1.95 4.25 max. 14.5
Model Family
Calculated MTBF4
Operating Temperature Range with derating (°C)
UCE-1.5/20-D48 UCE-1.8/30-D48 UCE-2.5/20-D48 UCE-3.3/15-D48 UCE-3.3/30-D48 UCE-5/10-D48 UCE-5/20-D48 UCE-12/4.2-D48 UCE-12/8.3-D48
+120 +125
Current limiting, hiccup autorestart. Remove overload recovery.
Continuous, output shorted ground. damage.
+85°C/85%
DYNAMIC CHARACTERISTICS Start-up Time Dynamic Load Remote Response VOUT VOUT (50-75-50% regulated load step) regulated (Max.) (Max.) final value, mSec max.
ABSOLUTE MAXIMUM RATINGS
Input Voltage: Continuous: Volt input models Transient (100 mSec. Max.) Volt input models On/Off Control Input Reverse Polarity Protection Output Overvoltage Protection Output Current
Volts Volts Volts Amps, sec. max. Magnetic feedback. specifications. Current-limited. Devices withstand sustained short circuit without damage. +125°C. soldering guidelines.
Model Family
Switching Frequency
UCE-1.5/20-D48 UCE-1.8/30-D48 UCE-2.5/20-D48 UCE-3.3/15-D48 UCE-3.3/30-D48 UCE-5/10-D48 UCE-5/20-D48 UCE-12/4.2-D48 UCE-12/8.3-D48
Storage Temperature Lead Temperature
Absolute maximums stress ratings. Exposure devices greater than these conditions adversely affect long-term reliability. Proper operation under conditions other than those listed Performance/Functional Specifications Table implied recommended.
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Isolated, High-Density, Eighth-Brick 100W DC/DC Converters
SPECIFICATIONS, CONTINUED
PERFORMANCE SPECIFICATION NOTES
models tested specified with external 1||10 ceramic/tantalum output capacitors external input capacitor. capacitors types. These capacitors necessary accommodate test equipment required achieve specified performance your applications. models stable regulate within spec under no-load conditions. General conditions Specifications deg.C, nominal, VOUT nominal, full load. Adequate airflow must supplied extended testing under power. Input Ripple Current tested specified over bandwidth. Input filtering 100V tantalum, CBUS 100V electrolytic, LBUS Note that Maximum Power Derating curves indicate average current nominal input voltage. higher temperatures and/or lower airflow, DC/DC converter will tolerate brief full current outputs total current over time does exceed Derating curve. Derating curves presented level altitude. aware reduced power dissipation with increasing density altitude. Mean Time Before Failure calculated using Telcordia (Belcore) SR-332 Method Case ground fixed conditions, Tpcboard=+25 deg.C, full output load, natural convection. On/Off Control normally controlled switch. also driven with external logic applying appropriate external voltages which referenced Input Common. On/Off Control Input should either open collector open drain transistor. Short circuit shutdown begins when output voltage degrades approximately from selected setting. outputs intended sink appreciable reverse current. This damage outputs. Output noise further reduced adding external filter. Filtering Noise Reduction. models fully operational meet published specifications, including "cold start" (10) Regulation specifications describe deviation line input voltage output load current varied from nominal midpoint value either extreme. (11) Alternate length and/or other output voltages available under special quantity order. (12) Output current limit non-latching. When overcurrent fault removed, converter will immediately recover. (13) exceed maximum power specifications when adjusting output trim. (14) zero output current, output contain frequency components which exceed ripple specification. output operated indefinitely with load. (15) reverse polarity accidentally applied input, body diode will become forward biased will conduct considerable current. ensure reverse input protection with full output load, always connect external input fuse series with +VIN input. approximately twice full input current rating with nominal input voltage.
PHYSICAL CHARACTERISTICS
Outline dimensions material diameter finish UCE-1.5/20-D48 UCE-1.8/30-D48, UCE-2.5/20-D48 Weight UCE-5/10-D48 UCE-5/20-D48 UCE-12/4.2-D48 UCE-3.3/15-D48 UCE-3.3/30-D48, UCE-12/8.3-D48 Electromagnetic interference (conducted radiated) (external filter required) Safety ounce grams) 0.81 ounces grams) part class EN55022 Designed meet UL/cUL 60950-1, CSA-C22.2 60950-1, IEC/EN 60950-1 0.71 ounces grams) mechanical specs (below) Copper alloy 0.04/0.062" (1.016/1.524mm) Nickel underplate with gold overplate 0.67 ounces grams)
SOLDERING GUIDELINES Murata Power Solutions recommends specifications below when installing these converters. These specifications vary depending solder type. Exceeding these specifications cause damage product. cautious when there high atmospheric humidity. strongly recommend mild pre-bake minutes). Your production environment differ therefore please thoroughly review these guidelines with your process engineers. Wave Solder Operations through-hole mounted products (THMT) Sn/Ag/Cu based solders: Maximum Preheat Temperature Maximum Temperature Maximum Solder Dwell Time Sn/Pb based solders: Maximum Preheat Temperature Maximum Temperature Maximum Solder Dwell Time seconds seconds
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Isolated, High-Density, Eighth-Brick 100W DC/DC Converters
MECHANICAL SPECIFICATIONS
Without Baseplate
2.30 (58.4) 0.40 (10.2) 0.18 (4.6)
2.00 (50.8)
PINS 1-3, 5-7: 0.040±0.001 (1.016±0.025) dia. PINS 0.060±0.001 (1.524±0.025) dia.
0.015 minimum clearance between standoffs highest component
0.300 (7.62) 0.300 (7.62)
0.15 0.900 (3.81) (22.9)
Dimensions inches shown ref. only).
Third Angle Projection
Bottom view With Baseplate
Screw length must through baseplate.
Tolerances (unless otherwise specified): 0.02 (0.5) .XXX 0.010 (0.25) Angles Components shown reference only.
PINS 1-3, 5-7: 0.040±0.001 (1.016±0.025) dia. PINS 0.060±0.001 (1.524±0.025) dia.
Please note that some competitive units different numbering alternate outline views. However units plug-compatible.
0.50 (12.7)
0.015 minimum clearance between standoffs highest component
0.18 (4.6)
2.00 (50.8)
INPUT/OUTPUT CONNECTIONS Function -Input On/Off Control +Input -Output -Sense Output Trim +Sense +Output
0.300 (7.62) 0.300 (7.62)
0.15 0.900 (3.81) (22.9)
Bottom view
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APPLICATION NOTES
Input Fusing Certain applications and/or safety agencies require fuses inputs power conversion components. Fuses should also used when there possibility sustained input voltage reversal which current-limited. recommend time delay fuse installed ungrounded input supply line with value which approximately twice maximum line current, calculated lowest input voltage. installer must observe relevant safety standards regulations. safety agency approvals, install converter compliance with end-user safety standard, i.e. IEC/EN/UL 60950-1. Input Reverse-Polarity Protection input voltage polarity reversed, internal body diode will become forward biased likely draw excessive current from power source. this source current-limited circuit appropriately fused, could cause permanent damage converter. Please sure install properlyrated external input fuse (see Specifications). Input Under-Voltage Shutdown Start-Up Threshold Under normal start-up conditions, converters will begin regulate properly until ramping-up input voltage exceeds remains Start-Up Threshold Voltage (see Specifications). Once operating, converters will turn until input voltage drops below Under-Voltage Shutdown Limit. Subsequent restart will occur until input voltage rises again above Start-Up Threshold. This built-in hysteresis prevents unstable on/off operation single input voltage. Users should aware however input sources near Under-Voltage Shutdown whose voltage decays input current consumed (such capacitor inputs), converter shuts then restarts external capacitor recharges. Such situations could oscillate. prevent this, make sure operating input voltage well above Shutdown voltage TIMES. Start-Up Time Assuming that output current rated maximum, Vout Start-Up Time (see Specifications) time interval between point when ramping input voltage crosses Start-Up Threshold fully loaded regulated output voltage enters remains within specified accuracy band. Actual measured times will vary with input source impedance, external input capacitance, input voltage slew rate final value input voltage appears converter. These converters include soft start circuit moderate duty cycle controller power thereby limiting input inrush current. On/Off Remote Control interval from command Vout regulated assumes that converter already input voltage stabilized above Start-Up Threshold before command. interval measured from command until output enters remains within specified accuracy band. specification assumes that output fully loaded maximum rated current. Similar conditions apply Vout regulated specification such external load capacitance soft start circuitry.
Input Source Impedance These converters will operate specifications without external components, assuming that source voltage very impedance reasonable input voltage regulation. Since real-world voltage sources have finite impedance, performance improved adding external filter components. Sometimes only small ceramic capacitor sufficient. Since difficult totally characterize applications, some experimentation needed. Note that external input capacitors must accept high speed switching currents. Because switching nature DC/DC converters, input these converters must driven from source with both impedance adequate input regulation. Performance will degrade with increasing input inductance. Excessive input inductance inhibit operation. input regulation specifies that input voltage, once operating, must never degrade below Shut-Down Threshold under load conditions. sure adequate trace sizes mount components close converter. Filtering, Input Ripple Current Output Noise models this converter series tested specified input reflected ripple current output noise using designated external input/output components, circuits layout shown figures below. External input capacitors (Cin figure) serve primarily energy storage elements, minimizing line voltage variations caused transient drops input conductors. Users should select input capacitors bulk capacitance appropriate frequencies), high ripple current ratings. figure below, Cbus Lbus components simulate typical voltage bus. Your specific system configuration require additional considerations. Please note that values Cin, Lbus Cbus will vary according specific converter model.
OSCILLOSCOPE CURRENT PROBE LBUS CBUS 33F, 700m 100kHz CBUS 220F, 100m 100kHz LBUS
+INPUT
-INPUT
Figure Measuring Input Ripple Current
critical applications, output ripple noise (also referred periodic random deviations PARD) reduced adding filter elements such multiple external capacitors. sure calculate component temperature rise from reflected current dissipated inside capacitor ESR. figure, copper strips simulate real-world printed circuit impedances between power supply load. order minimize circuit errors standardize tests between units, scope measurements should made using connectors probe ground should exceed half inch soldered directly fixture.
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Isolated, High-Density, Eighth-Brick 100W DC/DC Converters
+SENSE +OUTPUT COPPER STRIP
Note that temperatures ambient airflow, converter itself which obviously running higher temperature than outside air. Also note that very flow rates (below about LFM) similar "natural convection," that using fan-forced airflow.
SCOPE RLOAD
COPPER STRIP
-OUTPUT -SENSE
Murata Power Solutions makes Characterization measurements closed cycle wind tunnel with calibrated airflow. both thermocouples infrared camera system observe thermal performance. practical matter, quite difficult insert anemometer precisely measure airflow most applications. Sometimes possible estimate effective airflow thoroughly understand enclosure geometry, entry/exit orifice areas flowrate specifications. CAUTION: routinely accidentally exceed these Derating guidelines, converter have unplanned Over Temperature shut down. Also, these graphs collected slightly above Level altitude. sure reduce derating higher density altitude. Output Overvoltage Protection This converter monitors output voltage over-voltage condition. output exceeds limits, sensing circuit will power down unit, output voltage will decrease. After time-out period, will automatically attempt restart, causing output voltage ramp rated value. necessary power down reset converter automatic OVP-recovery restart. fault condition persists output voltage climbs excessive levels, circuitry will initiate another shutdown cycle. This on/off cycling referred "hiccup" mode. safely tests full current rated output voltage without damaging converter. Output Fusing converter extensively protected against current, voltage temperature extremes. However your output application circuit need additional protection. extremely unlikely event output circuit failure, excessive voltage could applied your circuit. Consider using appropriate fuse series with output. Output Current Limiting soon output current increases approximately 125% 150% maximum rated value, DC/DC converter will enter current-limiting mode. output voltage will decrease proportionally with increases output current, thereby maintaining somewhat constant power output. This also commonly referred power limiting. Current limiting inception defined point which full power falls below rated tolerance. Performance/Functional Specifications. Note particularly that output current briefly rise above rated value normal operation long average output power exceeded. This enhances reliability continued operation your application. output current high, converter will enter short circuit condition. Output Short Circuit Condition When converter current-limit mode, output voltage will drop output current demand increases. output voltage drops (approximately nominal output voltage most models), magnetically
0.1F CERAMIC TANTALUM LOAD INCHES (51-76mm) FROM MODULE
Figure Measuring Output Ripple Noise (PARD)
Floating Outputs Since these isolated DC/DC converters, their outputs "floating" with respect their input. essential feature such isolation ideal ZERO CURRENT FLOW between input output. Real-world converters however exhibit tiny leakage currents between input output (see Specifications). These leakages consist both stray capacitance coupling component leakage resistance. When using isolation feature, allow isolation voltage exceed specifications. Otherwise converter damaged. Designers will normally negative output (-Output) ground return load circuit. however positive output (+Output) ground return effectively reverse output polarity. Minimum Output Loading Requirements models regulate within specification stable under load full load conditions. Operation under load might however slightly increase output ripple noise. Thermal Shutdown prevent many over temperature problems damage, these converters include thermal shutdown circuitry. environmental conditions cause temperature DC/DC's rise above Operating Temperature Range shutdown temperature, on-board electronic temperature sensor will power down unit. When temperature decreases below turn-on threshold, converter will automatically restart. There small amount hysteresis prevent rapid on/off cycling. temperature sensor typically located adjacent switching controller, approximately center unit. Performance Functional Specifications. CAUTION: operate close thermal limits, converter shut down suddenly without warning. sure thoroughly test your application avoid unplanned thermal shutdown. Temperature Derating Curves graphs next section illustrate typical operation under variety conditions. Derating curves show maximum continuous ambient temperature decreasing maximum output current which acceptable under increasing forced airflow measured Linear Feet Minute ("LFM"). Note that these AVERAGE measurements. converter will accept brief increases current reduced airflow long average exceeded.
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Series
Isolated, High-Density, Eighth-Brick 100W DC/DC Converters
coupled voltage used develop primary side voltages will also drop, thereby shutting down controller. Following time-out period, will restart, causing output voltage begin ramping appropriate value. short-circuit condition persists, another shutdown cycle will initiate. This rapid on/off cycling called "hiccup mode". hiccup cycling reduces average output current, thereby preventing excessive internal temperatures and/or component damage. short circuit tolerated indefinitely. "hiccup" system differs from older latching short circuit systems because have power down converter make restart. system will automatically restore operation soon short circuit condition removed. Remote Sense Input Sense inputs with caution. Sense normally connected load. Sense inputs compensate output voltage inaccuracy delivered load. This done correcting voltage drops along output wiring current carrying capacity board etch. This output drop (the difference between Sense Vout when measured converter) should allowed exceed 0.5V. Consider using heavier wire this drop excessive. Sense inputs also improve stability converter load system optimizing control loop phase margin. Note: Sense input power Vout lines internally connected through value resistors their respective polarities that converter operate without external connection Sense. Nevertheless, Sense function used remote regulation, user should connect +Sense +Vout -Sense -Vout converter pins. remote Sense lines carry very little current. They also capacitively coupled output lines therefore feedback control loop regulate stabilize output. such, they impedance inputs must treated with care board layouts. Sense lines should adjacent signals, preferably Ground. cables discrete wiring, twisted pair, shielded tubing similar techniques. long, distributed wiring and/or significant inductance introduced into Sense control loop adversely affect overall system stability. doubt, test your applications observing converter's output transient response during step loads. There should appreciable ringing oscillation. also adjust output trim slightly compensate voltage loss external filter elements. exceed maximum power ratings. Please observe Sense inputs tolerance avoid improper operation: [Vout(+) -Vout(-)] [Sense(+) -Sense(-)] Vout Output overvoltage protection monitored output voltage pin, Sense pin. Therefore excessive voltage differences between Vout Sense together with trim adjustment output cause overvoltage protection circuit activate shut down output. Power derating converter based combination maximum output current highest output voltage. Therefore designer must insure: (Vout pins) (Iout) (Max. rated output power)
+OUTPUT Contact resistance losses drops Sense Current ON/OFF CONTROL TRIM Sense Return
-SENSE
-INPUT
+SENSE
LOAD
Return
+INPUT
-OUTPUT
Contact resistance losses drops
Figure Remote Sense Circuit Configuration
Trimming Output Voltage Trim input converter allows user adjust output voltage over rated trim range (please refer Specifications). trim equations circuit diagrams that follow, trim adjustments either trimpot single fixed resistor connected between Trim input either +Sense -Sense terminals. some converters, external user-supplied precision voltage also used trimming). Trimming resistors should have temperature coefficient (±100 ppm/deg.C less) mounted close converter. Keep leads short. trim function used, leave trim unconnected. With trim, converter will exhibit specified output voltage accuracy. There CAUTIONs aware Trim input: CAUTION: avoid unplanned power down cycles, exceed EITHER maximum output voltage maximum output power when setting trim. particularly careful with trimpot. output voltage excessive, circuit inadvertantly shut down converter. maximum power exceeded, converter enter current limiting. power exceeded extended period, converter overheat encounter overtemperature shut down. CAUTION: careful external electrical noise. Trim input senstive input converter's feedback control loop. Excessive electrical noise cause instability oscillation. Keep external connections short Trim input. shielding needed. Also consider adding small value ceramic capacitor between Trim -Vout bypass electrical noise.
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Isolated, High-Density, Eighth-Brick 100W DC/DC Converters
Trim Equations Trim Down Connect trim resistor between trim -Sense Trim Connect trim resistor between trim +Sense
RTrimDn 5.11 10.22
RTrimUp 5.11 VNOM (1+') 5.11 10.22 1.225
Where, (VNOM VOUT) VNOM VNOM nominal, untrimmed output voltage. VOUT desired output voltage. exceed specified trim range maximum power ratings when adjusting trim. precision resistors mounted close converter short leads.
Trim Circuits
-INPUT
+OUTPUT
+VCC
+SENSE ON/OFF CONTROL
LOAD
TRIM
ON/OFF CONTROL
-SENSE +INPUT
-INPUT
-OUTPUT
Figure Trim Connections Using Trimpot
Figure Driving On/Off Control (suggested circuit)
-INPUT
+OUTPUT
-INPUT
+OUTPUT
+SENSE ON/OFF CONTROL ON/OFF CONTROL
+SENSE RTRIM DOWN TRIM LOAD
TRIM RTRIM -SENSE
LOAD
-SENSE +INPUT
+INPUT
-OUTPUT
-OUTPUT
Figure Trim Connections Increase Output Voltages Connect sense respective VOUT sense used with remote load.
Figure Trim Connections Decrease Output Voltages
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Isolated, High-Density, Eighth-Brick 100W DC/DC Converters
Remote On/Off Control input side, remote On/Off Control ordered with either polarity. Positive: Standard models enabled when On/Off left open pulled high +Vin with respect -Vin. internal bias current causes open rise approximately +15V. Some models will also turn lower intermediate voltages (see Specifications). Positive-polarity devices disabled when On/Off grounded brought within voltage (see Specifications) with respect -Vin. Negative: Optional negative-polarity devices (enabled) when grounded brought within voltage (see Specifications) with respect -Vin. device (disabled) when On/Off left open pulled high approximately +15V with respect -Vin. Dynamic control On/Off function should able sink appropriate signal current when brought withstand appropriate voltage when brought high. aware that there finite time milliseconds (see Specifications) between time On/Off Control activation stable, regulated output. This time will vary slightly with output load type current input conditions. There several CAUTIONs On/Off Control: CAUTION: While possible control On/Off with external logic carefully observe voltage levels, preferred circuit either open drain/open collector transistor, switch relay (which thereupon controlled logic) returned negative Vin. CAUTION: apply voltages On/Off when there input power voltage. Otherwise converter permanently damaged. Output Capacitive Load These converters require external capacitance added achieve rated specifications. Users should only consider adding capacitance reduce switching noise and/or handle spike current step loads. Install only enough capacitance achieve noise objectives. Excess external capacitance cause regulation problems, slower transient response possible instability. Proper wiring Sense inputs will improve these factors under capacitive load. maximum rated output capacitance specification given capacitor installed immediately adjacent converter. extended output wiring smaller wire gauge less ground plane tolerate somewhat higher capacitance. Also, capacitors with higher larger capacitance.
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Isolated, High-Density, Eighth-Brick 100W DC/DC Converters
Typical Performance Curves
UCE-1.5/20-D48 Efficiency Line Voltage Load Current
Output Current
UCE-1.5/20-D48 Maximum Current Temperature Derating (Vin 48V, baseplate, longitudinal airflow level)
Efficiency
Ambient Temperature
Load Current
UCE-1.8/30-D48 Efficiency Line Voltage Load Current
UCE-1.8/30-D48 Maximum Current Temperature Derating (Vin 48V, baseplate, longitudinal airflow level) Output Current
Efficiency
Ambient Temperature
Load Current
UCE-2.5/20-D48 Efficiency Line Voltage Load Current Efficiency Output Current
UCE-2.5/20-D48 Maximum Current Temperature Derating (Vin 48V, with baseplate, longitudinal airflow level) Ambient Temperature Natural Convection
Load Current
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Isolated, High-Density, Eighth-Brick 100W DC/DC Converters
Typical Performance Curves
UCE-3.3/15-D48 Efficiency Line Voltage Load Current
Output Current Efficiency
UCE-3.3/15-D48 Maximum Current Temperature Derating (Vin 48V, baseplate, longitudinal airflow level)
Ambient Temperature
Load Current
UCE-3.3/30-D48 Efficiency Line Voltage Load Current
UCE-3.3/30-D48 Maximum Current Temperature Derating (Vin 48V, baseplate, longitudinal airflow level)
Efficiency
Output Current
Load Current Ambient Temperature
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Isolated, High-Density, Eighth-Brick 100W DC/DC Converters
Typical Performance Curves
UCE-5/10-D48 Efficiency Line Voltage Load Current
Power Dissipation (Watts)
Output Current
UCE-5/10-D48 Maximum Current Temperature Derating Level (Vin 48V, transverse airflow, baseplate)
Power Dissipation (Vin 48V)
Efficiency
Natural Convection
Ambient Temperature
Load Current
UCE-5/20-D48 Efficiency Line Voltage Load Current
Efficiency
UCE-5/20-D48 Maximum Current Temperature Derating Level (Vin 48V, transverse airflow, baseplate)
Power Dissipation (Watts) Power Dissipation (Vin 48V) Load Current
Output Current Natural Convection
Ambient Temperature
www.murata-ps.com
Technical enquiries email: sales@murata-ps.com, tel: 3000
MDC_UCE.A18 Page
Series
Isolated, High-Density, Eighth-Brick 100W DC/DC Converters
Typical Performance Curves
UCE-12/4.2-D48 Efficiency Line Voltage Load Current
Efficiency
Output Current 4.25 UCE-12/4.2-D48 Maximum Current Temperature Derating (Vin 48V, baseplate, longitudinal airflow level)
3.75 3.25
Load Current
Ambient Temperature
UCE-12/8.3-D48 Efficiency Line Voltage Load Current Efficiency Load Current Output Current
UCE-12/8.3-D48 Maximum Current Temperature Derating (Vin 48V, baseplate, longitudinal airflow level)
Ambient Temperature
UCE-12/8.3-D48 Maximum Current Temperature Derating level (Vin 48V, with baseplate, airflow from -Vin +Vin) Output Current (Amps) Ambient Temperature
www.murata-ps.com
Technical enquiries email: sales@murata-ps.com, tel: 3000
MDC_UCE.A18 Page
Series
Isolated, High-Density, Eighth-Brick 100W DC/DC Converters
USA: Canada: France: Germany: Japan: China: Singapore:
Mansfield (MA), Tel: (508) 339-3000, email: sales@murata-ps.com Toronto, Tel: (866) 740-1232, email: toronto@murata-ps.com Milton Keynes, Tel: (0)1908 615232, email: mk@murata-ps.com Montigny Bretonneux, Tel: (0)1 email: france@murata-ps.com Tel: (0)89-544334-0, email: munich@murata-ps.com Tokyo, Tel: 3-3779-1031, email: sales_tokyo@murata-ps.com Osaka, Tel: 6-6354-2025, email: sales_osaka@murata-ps.com Shanghai, Tel: 3678, email: shanghai@murata-ps.com Guangzhou, Tel: 8066, email: guangzhou@murata-ps.com Parkway Centre, Tel: 6348 9096, email: singapore@murata-ps.com
Technical enquiries email: sales@murata-ps.com, tel: 3000
Murata Power Solutions, Inc. Cabot Boulevard, Mansfield, 02048-1151 U.S.A. Tel: (508) 339-3000 (800) 233-2765 Fax: (508) 339-6356
www.murata-ps.com email: sales@murata-ps.com 9001 REGISTERED
03/27/09
Murata Power Solutions, Inc. makes representation that products circuits described herein, other technical information contained herein, will infringe upon existing future patent rights. descriptions contained herein imply granting licenses make, use, sell equipment constructed accordance therewith. Specifications subject change without notice. 2008 Murata Power Solutions, Inc.
www.murata-ps.com
MDC_UCE.A18 Page
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