MURATA POWER SOLUTIONS ULQ-3.3/20-D48P-C

ULQ Models www.murata-ps.com Single Output, Low-Profile, Quarter-Brick 8-25 Amp Isolated DC-DC Converters Typical units Features For applications requiring improved electrical and thermal perfomance at reduced cost DATEL's new ULQ Series "Quarter-Brick" DC-DC Converters suit perfectly. They measure just 1.45 x 2.30 x ■ Standard quarter-brick package/pinout 0.35 inches (36.8 x 58.4 x 8.9mm) and fit the industry-standard footprint. You can also "pick-and- in through-hole or SMT version place" the ULQ-SMT version optimizing your automated SMT process. ■ Low cost; Low profile, 0.35" (8.9mm) From an 18-36V or 36-75V input, ULQ's deliver outputs of 1.2, 1.5, 1.8, or 2V fully rated at 15 or ■ 24V and 48V nominal inputs 25A, 2.5 or 3.3V at 15 or 20A, 5V at 15A and 12V at 8-10A. They ■ Output current: 8 to 25 Amps employ an interleaved, synchronous-rectifier topology that exploits 100% of their duty cycle. They simultaneously achieve ultra-high efficiency (to 91%), tight line/load regulation (±0.125/0.25%), low ■ Output voltages: 1.2/1.5/1.8/2/2.5/3.3/5/12V noise (25-70mVp-p), and quick step response (200µsec). ■ Interleaved synchronous-rectifier topology A state of the art, single-board, open-frame design with reduced component count, high · Ultra high efficiency efficiency, low-on-resistance FET's, and planar magnetics embedded in heavy-copper pc boards all · No output reverse conduction contribute to impressive thermal derating. ■ Outstanding thermal performance The ULQ's feature set includes high isolation (2250Vdc), input pi filters, input undervoltage shut- ■ On/off control, trim & sense functions down, output overvoltage protection, current limiting, short-circuit protection and thermal shutdown. The standard footprint carries on/off control (positive or negative logic), output trim (+10/–20%) and ■ Fully isolated, 2250Vdc (BASIC) output sense functions. ■ Output overvoltage protection All ULQ quarter-bricks are designed to meet the BASIC-insulation requirements of UL/EN/ ■ Fully I/O protected; Thermal shutdown IEC60950 and they will carry the CE mark. Safety certifications, EMC compliance testing and qualifi- ■ UL/EN/IEC60950 safety approvals cation testing (including HALT) are currently in progress. Contact DATEL for latest updates. ■ Qual/HALT/EMI tested +SENSE (7) +VIN +VOUT (1) (8) SWITCH CONTROL –VOUT (4) –VIN (3) –SENSE (5) PWM OPTO REFERENCE & CONTROLLER ISOLATION ERROR AMP VOUT TRIM (6) INPUT UNDERVOLTAGE, INPUT OVERVOLTAGE, AND OUTPUT OVERVOLTAGE COMPARATORS * Can be ordered with positive (standard) or negative (optional) polarity. REMOTE ON/OFF CONTROL* (2) Figure 1. Simplified Schematic Typical topology is shown. For full details go to www.murata-ps.com/rohs www.murata-ps.com/support Typical topology is shown MDC_ULQ-15A.E05 Page 1 of 17 ULQ Models Single Output, Low-Profile, Quarter-Brick 8-25 Amp Isolated DC-DC Converters Performance Specifications and Ordering Guide ➀ ORDERING GUIDE Output Input Package Efficiency Regulation (Max.) (Case, Root Model ➄ Vout Iout ➁ R/N (mVp-p) ➁ Vin Nom. Range IIN ➃ Pinout) (Volts) (Amps) Typ. Max. Line (Volts) (Volts) (mA/A) Min. Typ. Load ➂ ULQ-1.5/15-D48N-C 1.5 15 25 50 ±0.125% ±0.25% 48 36-75 35/0.5 87% 89% C37, P32 ULQ-1.5/25-D24P-C 1.5 25 50 100 ±0.125% ±0.25% 24 18-36 50/1.8 85.5% 87.5% C37, P32 ULQ-1.5/25-D48N-C 1.5 25 45 75 ±0.125% ±0.25% 48 36-75 30/0.9 85% 87% C37, P32 ULQ-1.8/15-D48N-C 1.8 15 25 50 ±0.125% ±0.25% 48 36-75 35/0.6 87.5% 89% C37, P32 ULQ-1.8/25-D24P-C 1.8 25 50 100 ±0.125% ±0.25% 24 18-36 90/2.2 85.5% 87.5% C37, P32 ULQ-1.8/25-D48N-C 1.8 25 70 100 ±0.25% ±0.25% 48 36-75 45/1.1 85.5% 87.5% C37, P32 ULQ-2/15-D48N-C 2 15 25 50 ±0.125% ±0.25% 48 36-75 45/0.6 87% 89% C37, P32 ULQ-2/25-D24P-C 2 25 50 100 ±0.125% ±0.25% 24 18-36 50/2.4 86% 88% C37, P32 ULQ-2/25-D48N-C 2 25 70 100 ±0.25% ±0.25% 48 36-75 50/1.2 86% 88% C37, P32 ULQ-2.5/15-D48N-C 2.5 15 35 55 ±0.125% ±0.25% 48 36-75 45/0.9 88% 89.5% C37/C40, P32 ULQ-3.3/15-D48NM-C 3.3 15 45 75 ±0.125% ±0.25% 48 36-75 45/1.2 88.5% 90.5% C37/C40, P32 ULQ-3.3/20-D24PM-C 3.3 20 50 100 ±0.125% ±0.25% 24 18-36 80/3.1 87.5% 89.5% C37/C40, P32 ULQ-3.3/20-D48NM-C 3.3 20 45 75 ±0.125% ±0.25% 48 36-75 45/1.6 88% 90% C37/C40, P32 ULQ-5/15-D24PM-C 5 15 50 100 ±0.25% ±0.25% 24 18-36 50/3.5 89% 91% C37/C40, P32 ULQ-5/15-D48NM-C 5 15 50 100 ±0.1% ±0.4% 48 36-75 50/1.7 89% 91% C37/C40, P32 ULQ-12/8-D24PM-C 12 8 95 130 ±0.25% ±0.25% 24 18-36 90/4.4 89% 90.5% C37/C40, P32 ULQ-12/10-D48NM-C 12 10 90 130 ±0.25% ±0.25% 48 36-75 80/2.9 88% 90% C37/C40, P32 ULQ-3.3/15-D48N-C 3.3 15 45 75 ±0.125% ±0.25% 48 36-75 45/1.2 88.5% 90.5% C37/C40, P32 ULQ-3.3/20-D24P-C 3.3 20 50 100 ±0.125% ±0.25% 24 18-36 80/3.1 87.5% 89.5% C37/C40, P32 ULQ-3.3/20-D48N-C 3.3 20 45 75 ±0.125% ±0.25% 48 36-75 45/1.6 88% 90% C37/C40, P32 ULQ-5/15-D24P-C 5 15 50 100 ±0.25% ±0.25% 24 18-36 50/3.5 89% 91% C37/C40, P32 ULQ-5/15-D48N-C 5 15 50 100 ±0.1% ±0.4% 48 36-75 50/1.7 89% 91% C37/C40, P32 ULQ-12/8-D24P-C 12 8 95 130 ±0.25% ±0.25% 24 18-36 90/4.4 89% 90.5% C37/C40, P32 ULQ-12/10-D48N-C 12 10 90 130 ±0.25% ±0.25% 48 36-75 80/2.9 88% 90% C37/C40, P32 ➀ Typical at TA = +25°C under nominal line voltage and full-load conditions. All models are ➃ Nominal line voltage, no load/full load condition. specified with an external 1µF multi-layer ceramic and 10µF capacitors across their output pins. ➄ Please refer to the Part Number Structure when ordering. ➁ Ripple/Noise (R/N) measured over a 20MHz bandwidth. ➅ Not all model number combinations are available. Consult Murata Power Solutions. ➂ Devices have no minimum-load requirements and will regulate under no-load conditions. Regulation specifications describe the output voltage deviation as the line voltage or load is varied from its nominal/midpoint value to either extreme. (Load step = 50%.) ULQ-12/8-D24N-C ULQ-12/8-D24PL1-C ULQ-3.3/20-D24N-C ULQ-3.3/20-D24PL2-C ULQ-12/8-D24NL1-C ULQ-3.3/15-D48N-C ULQ-3.3/20-D24NL2-C ULQ-5/15-D48N-C ULQ-12/8-D24NL2-C ULQ-3.3/15-D48P-C ULQ-3.3/20-D24P-C ULQ-5/15-D48P-C ULQ-12/8-D24P-C ULQ-3.3/15-D48PL1-C ULQ-3.3/20-D24PL1-C ULQ-5/15-D48PL2-C ULQ-12/10-D48NL1-C ULQ-12/10-D48NL2-C ULQ-12/10-D48PL2-C PART NUMBER STR UCTURE - C U LQ - 3.3 / 20 D48 N M Lx - Output RoHS-6 compliant Configuration Pin Length Option Quarter-Brick Package Surface-Mount Package (see list above) Nominal Output Voltage Maximum Rated Output Remote On/Off Control Logic Input Voltage Range See page 16 for complete Part Number Structure. www.murata-ps.com/support MDC_ULQ-15A.E05 Page 2 of 17 ULQ Models Single Output, Low-Profile, Quarter-Brick Performance/Functional Specifications 8-25 Amp Isolated DC-DC Converters (1) Typical @ TA = +25°C under nominal line voltage, full-load conditions, unless noted. Environmental Input (13) Calculated MTBF: TBD million hours (2) Input Voltage Range: (4) (14) Operating Temperature (Ambient): –40 to +85°C with derating D24 Models 18-36 Volts (24V nominal) See derating curves D48 Models 36-75 Volts (48V nominal) (4) (7) PCB Temperature: Overvoltage Shutdown Maximum Allowable +100°C D24 Models 37-41 Volts (39V typical) Thermal Shutdown +105 to 120°C, +115°C typical (3) D48 Models None Physical (4) Start-Up Threshold: Dimensions See Mechanical Dimensions D24 Models 16-18 Volts (17.5V typical) Pin Material (through-hole) Gold-plated copper alloy with nickel D48 Models 34-36 Volts (35V typical) underplate (4) Undervoltage Shutdown: Pad Material (SMT) Copper alloy, pure tin over nickel underplate D24 Models 15.5-17.5 Volts (16.75V typical) Weight: 1 ounce (28 grams) D48 Models 32.5-34.5 Volts (33.5V typical) Primary-to-Secondary Insulation Level Basic Input Current: Normal Operating Conditions See Ordering Guide EMI Conducted and Radiated FCC Part 15, EN55022 may require 2 external filter Inrush Transient 0.05A sec maximum Short Circuit 50-100mA Safety UL/IEC/EN60950-1 CSA-C22.2 No. 234 Standby Mode: Off, UV, Thermal Shutdown 4-10mA (5) Input Reflected Ripple Current 8-50mAp-p (1) All models are tested and specified with external output capacitors (1µF ceramic in parallel Internal Input Filter Type Pi with 10µF tantalum), unless otherwise noted. These converters have no minimum-load require- (3) Reverse-Polarity Protection 1 minute duration, 5A maximum ments and will effectively regulate under no-load conditions. (2) Contact Murata Power Solutions for input voltage ranges other than those listed. (6) Remote On/Off Control (Pin 2): (3) See Absolute Maximum Ratings for allowable input voltages. Positive Logic ("P" Suffix Models) On = open, open collector or (4) See Technical Notes/Performance Curves for additional explanations and details. 3.5-13V applied (5) Input Ripple Current is tested/specified over a 5-20MHz bandwidth with an external 33µF input Off = pulled low to 0-0.8V IIN = 6mA max. capacitor and a simulated source impedance of 220µF and 12µH. See I/O Filtering, Input Negative Logic ("N" Suffix Models) On = pulled low to 0-0.8V IIN = 6mA max. Ripple Current and Output Noise for details. Off = open, open collector or (6) The On/Off Control is designed to be driven with open-collector (or equivalent) logic or the 3.5-13V applied application of appropriate voltages (referenced to –Input (pin 1)). See Remote On/Off Control for more details. Output (7) All models are fully operational and meet published specifications, including "cold start," at –40°C. Minimum Loading No load (8) Extreme Accuracy refers to the accuracy of either trimmed or untrimmed output voltages over all normal operating ranges and combinations of input voltage, output load and temperature. VOUT Accuracy (Full Load): (9) See Output Trimming for detailed trim equations. Initial ±1.25% maximum (10) The Current-Limit Inception point is the output current level at which the ULQ’s power-limiting Temperature Coefficient ±0.02% per °C circuitry drops the output voltage 2% from its initial value. See Output Current Limiting and (8) Extreme ±3% Short-Circuit Protection for more details. (9) VOUT Trim Range +10%, –20% (11) See Performance Curves for additional information. (12) (4) For the Start-Up Time specifications, output settling is defined by the output voltage having Remote Sense Compensation +10% reached ±1% of its final value. Ripple/Noise (20MHz BW) See Ordering Guide (13) MTBF’s are calculated using Telcordia (Bellcore) Method 1 Case 3, ground fixed conditions, +40°C case temperature, and full-load conditions. Line/Load Regulation See Ordering Guide Efficiency See Ordering Guide Isolation Voltage: Input-to-Output 2000Vdc minimum, D24 models Absolute Maximum Ratings 2250Vdc minimum, D48 models Input Voltage: D24V Models D48V Models Isolation Resistance 100MΩ Continuous: See OVP 81 Volts Isolation Capacitance 470pF Transient (100msec): NA 100 Volts (10) Current Limit Inception (98% VOUT) Input Reverse-Polarity Protection Input Current must be <5A. 1 minute After warmup +125% of maximum rated current duration. Fusing recommended. (4) Short Circuit: Output Current Current limited. Devices can withstand Current Hiccup with auto-restart an indefinite output short circuit. Duration Continuous On/Off Control (Pin 2) Max. Voltages (4) Overvoltage Protection: VOUT nominal +20% Referenced to –Input (pin 1) –0.3 to +13.6 Volts OVP method Comparator magnetic feedback Storage Temperature –55 to +125°C Dynamic Characteristics (11) Lead Temperature Dynamic Load Response Through-hole Soldering +300°C, 10 seconds (50% Load Step) 60-300µsec, model dependent SMT Soldering Refer to solder profile (4) (12) Start-Up Time: VIN to VOUT; On/Off to VOUT 30msec typical, 50msec maximum These are stress ratings. Exposure of devices to any of these conditions may adversely Switching Frequency 160-300kHz, model dependent affect long-term reliability. Proper operation under conditions other than those listed in the Performance/Functional Specifications Table is not implied, nor recommended. Maximum Capacitive Load 4700 to 10,000µF, model dependent www.murata-ps.com/support MDC_ULQ-15A.E05 Page 3 of 17 ULQ Models Single Output, Low-Profile, Quarter-Brick TECHNICAL NOTES 8-25 Amp Isolated DC-DC Converters Input Fusing A built-in hysterisis for all models will not allow the converter to restart until the input voltage is sufficiently reduced. Certain applications and/or safety agencies may require the installation of fuses at the inputs of power conversion components. Fuses should also be All 48VIN models have the overvoltage shutdown function disabled, based used if the possibility of sustained, non-current-limited, input-voltage polarity on requirements to withstand brief input surges and transients to 100V for reversals exists. For DATEL ULQ series DC-DC converters, we recommend up to 100msec without voltage interruption. Contact DATEL to have input the use of a time delay fuse, installed in the ungrounded input supply line, overvoltage shutdown for 48VIN models enabled. with a value no greater than 20 Amps. Input Source Impedance As a rule of thumb however, we recommend the use of a normal-blow or The input of ULQ converters must be driven from a low ac-impedance slow-blow fuse with a typical value about twice the maximum input current, source. The DC-DC's performance and stability can be compromised by the calculated at low line with the converter's minimum efficiency. use of highly inductive source impedances. The input circuit shown in Figure All relevant national and international safety standards and regulations must 2 is a practical solution that can be used to minimize the effects of induc- be observed by the installer. For system safety agency approvals, the tance in the input traces. For optimum performance, components should be converters must be installed in compliance with the requirements of the end- mounted close to the DC-DC converter. use safety standard, i.e. IEC/EN/UL60950. I/O Filtering, Input Ripple Current, and Output Noise Input Reverse-Polarity Protection All models in the ULQ Series are tested/specified for input reflected ripple If the input voltage polarity is accidentally reversed, an internal diode will current and output noise using the specified external input/output compo- become forward biased and likely draw excessive current from the power nents/circuits and layout as shown in the following two figures. External input source. If this source is not current limited or the circuit appropiately fused, it capacitors (CIN in Figure 2) serve primarily as energy-storage elements, could cause permanent damage to the converter. minimizing line voltage variations caused by transient IR drops in conductors from backplane to the DC-DC. Input caps should be selected for bulk capaci- Input Undervoltage Shutdown and Start-Up Threshold tance (at appropriate frequencies), low ESR, and high rms-ripple-current ratings. The switching nature of DC-DC converters requires that dc voltage Under normal start-up conditions, devices will not begin to regulate properly sources have low ac impedance as highly inductive source impedance until the ramping-up input voltage exceeds the Start-Up Threshold Voltage. can affect system stability. In Figure 2, CBUS and LBUS simulate a typical dc Once operating, devices will not turn off until the input voltage drops below voltage bus. Your specific system configuration may necessitate additional the Undervoltage Shutdown limit. Subsequent re-start will not occur until the considerations. input is brought back up to the Start-Up Threshold. This built in hysteresis prevents any unstable on/off situations from occurring at a single input TO CURRENT OSCILLOSCOPE voltage. PROBE 1 +VIN Start-Up Time LBUS + The VIN to VOUT Start-Up Time is the time interval between the point at which VIN CBUS CIN the ramping input voltage crosses the Start-Up Threshold and the fully loaded – output voltage enters and remains within its specified accuracy band. Actual 3 –VIN measured times will vary with input source impedance, external input capaci- CIN = 33µF, ESR < 700mΩ @ 100kHz tance, and the slew rate and final value of the input voltage as it appears at CBUS = 220µF, ESR < 100mΩ @ 100kHz the converter. The ULQ Series implements a soft start circuit to limit the duty LBUS = 12µH cycle of its PWM controller at power up, thereby limiting the input inrush current. Figure 2. Measuring Input Ripple Current The On/Off Control to VOUT start-up time assumes the converter has its In critical applications, output ripple/noise (also referred to as periodic and nominal input voltage applied but is turned off via the On/Off Control pin. The random deviations or PARD) may be reduced below specified limits using fil- specification defines the interval between the point at which the converter is tering techniques, the simplest of which is the installation of additional exter- turned on (released) and the fully loaded output voltage enters and remains nal output capacitors. They function as true filter elements and should be within its specified accuracy band. selected for bulk capacitance, low ESR and appropriate frequency response. All external capacitors should have appropriate voltage ratings and be Similar to the VIN to VOUT start-up, the On/Off Control to VOUT start-up located as close to the converter as possible. Temperature variations for all time is also governed by the internal soft start circuitry and external load relevant parameters should also be taken carefully into consideration. The capacitance. The difference in start up time from VIN to VOUT and from On/Off most effective combination of external I/O capacitors will be a function of Control to VOUT is therefore insignificant. line voltage and source impedance, as well as particular load and layout Input Overvoltage Shutdown conditions. Our Applications Engineers can recommend potential solutions and discuss the possibility of our modifying a given device's internal filtering All 24VIN ULQ DC-DC's are equipped with input overvoltage protection. Input to meet your specific requirements. Contact our Applications Engineering voltages exceeding the input overvoltage shutdown specification listed in the Group for additional details. Performance/Functional Specifications will cause the device to shutdown. www.murata-ps.com/support MDC_ULQ-15A.E05 Page 4 of 17 ULQ Models Single Output, Low-Profile, Quarter-Brick 8-25 Amp Isolated DC-DC Converters tion, the output voltage will decrease proportionately with increases in output current, thereby maintaining somewhat constant power dissipation. This is 7 +SENSE commonly referred to as power limiting. Current limit inception is defined as 8 +VOUT the point at which the full-power output voltage falls below the specified toler- ance. See Performance/Functional Specifications. If the load current, being drawn from the converter, is significant enough, the unit will go into a short RLOAD SCOPE C1 C2 circuit condition as described below. 4 Short Circuit Condition –VOUT 5 –SENSE 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, the C1 = 1µF magnetically coupled voltage used to develop primary side voltages will also C2 = 10µF TANTALUM drop, thereby shutting down the PWM controller. Following a time-out period, LOAD 2-3 INCHES (51-76mm) FROM MODULE the PWM will restart causing the output voltage to begin ramping to their appropriate value. If the short-circuit condition persists, another shutdown Figure 3. Measuring Output Ripple/Noise (PARD) cycle will be initiated. This on/off cycling is referred to as "hiccup" mode. Floating Outputs The hiccup cycling reduces the average output current, thereby preventing internal temperatures from rising to excessive levels. The ULQ Series is Since these are isolated DC-DC converters, their outputs are "floating" with capable of enduring an indefinite short circuit output condition. respect to their input. Designers will normally use the –Output (pin 4) as the FEATURES AND OPTIONS ground/return of the load circuit. You can however, use the +Output (pin 8) as ground/return to effectively reverse the output polarity. Remote Sense Minimum Output Loading Requirements Note: The Sense and VOUT lines are internally connected through low-value ULQ converters employ a synchronous-rectifier design topology and all resistors. Nevertheless, if the sense function is not used for remote regulation models regulate within spec and are stable under no-load to full load condi- the user should connect the +Sense to +VOUT and -Sense to –VOUT at the tions. Operation under no-load conditions however might slightly increase the DC-DC converter pins. output ripple and noise. ULQ series converters employ a sense feature to provide point of use regula- tion, thereby overcoming moderate IR drops in pcb conductors or cabling. Thermal Shutdown The remote sense lines carry very little current and therefore require minimal The ULQ converters are equipped with thermal-shutdown circuitry. If envi- cross-sectional-area conductors. The sense lines, which are capacitively ronmental conditions cause the temperature of the DC-DC converter to rise coupled to their respective output lines, are used by the feedback control-loop above the designed operating temperature, a precision temperature sensor to regulate the output. As such, they are not low impedance points and must will power down the unit. When the internal temperature decreases below the be treated with care in layouts and cabling. Sense lines on a pcb should be threshold of the temperature sensor, the unit will self start. See Performance/ run adjacent to dc signals, preferably ground. In cables and discrete wiring Functional Specifications. applications, twisted pair or other techniques should be implemented. Output Overvoltage Protection ULQ series converters will compensate for drops between the output voltage at the DC-DC and the sense voltage at the DC-DC provided that: The ULQ output voltage is monitored for an overvoltage condition using a comparator. The signal is optically coupled to the primary side and if the [VOUT(+) –VOUT(–)] – [Sense(+) –Sense (–)] ≤ 10% VOUT output voltage rises to a level which could be damaging to the load, the sens- ing circuitry will power down the PWM controller causing the output voltage Contact and PCB resistance losses due to IR drops to decrease. Following a time-out period the PWM will restart, causing the 8 1 +VOUT output voltage to ramp to its appropriate value. If the fault condition persists, +VIN IOUT and the output voltage again climbs to excessive levels, the overvoltage 7 +SENSE circuitry will initiate another shutdown cycle. This on/off cycling is referred to Sense Current as "hiccup" mode. 2 ON/OFF TRIM 6 LOAD CONTROL Sense Return Current Limiting 5 –SENSE IOUT Return As soon as the output current increases to approximately 130% of its rated 3 4 –VIN value, the DC-DC converter will go into a current-limiting mode. In this condi- –VOUT Contact and PCB resistance losses due to IR drops Figure 4. Remote Sense Circuit Configuration www.murata-ps.com/support MDC_ULQ-15A.E05 Page 5 of 17 ULQ Models Single Output, Low-Profile, Quarter-Brick 8-25 Amp Isolated DC-DC Converters Output overvoltage protection is monitored at the output voltage pin, not the A single resistor connected from the Trim pin (pin 6) to the +Sense (pin 7) will increase the output voltage. A resistor connected from the Trim Pin (pin 6) to Sense pin. Therefore, excessive voltage differences between VOUT and Sense in conjunction with trim adjustment of the output voltage can cause the over- the –Sense (pin 5) will decrease the output voltage. voltage protection circuitry to activate (see Performance Specifications for Trim adjustments greater than the specified +10%/–20% can have an overvoltage limits). Power derating is based on maximum output current and adverse affect on the converter’s performance and are not recommended. voltage at the converter's output pins. Use of trim and sense functions can Excessive voltage differences between VOUT and Sense, in conjunction with cause output voltages to increase, thereby increasing output power beyond trim adjustment of the output voltage, can cause the overvoltage protection the conveter's specified rating, or cause output voltages to climb into the circuitry to activate (see Performance Specifications for overvoltage limits). output overvoltage region. Therefore, the designer must ensure: Temperature/power derating is based on maximum output current and volt- (VOUT at pins) × (IOUT) ≤ rated output power age at the converter's output pins. Use of the trim and sense functions can cause output voltages to increase, thereby increasing output power beyond Trimming Output Voltage the converter's specified rating, or cause output voltages to climb into the output overvoltage region. Therefore: ULQ converters have a trim capability (pin 6) that enables users to adjust the output voltage from +10% to –20% (refer to the trim equations and trim (VOUT at pins) x (IOUT) ≤ rated output power graphs that follow). Adjustments to the output voltage can be accomplished The Trim pin (pin 6) is a relatively high impedance node that can be suscep- via a trim pot (Figure 5) or a single fixed resistor as shown in Figures 6 and 7. tible to noise pickup when connected to long conductors in noisy environ- A single fixed resistor can increase or decrease the output voltage depending ments. In such cases, a 0.22µF capacitor can be added to reduce this long on its connection. Resistors should be located close to the converter and lead effect. have TCR's less than 100ppm/°C to minimize sensitivity to changes in Trim Equations temperature. If the trim function is not used, leave the trim pin open. ULQ-1.2/15-D48 & ULQ-1.2/25-D48 1.308(VO – 0.793) 1.037 –1.413 –1.413 RT (kΩ) = RT (kΩ) = UP DOWN VO – 1.2 1.2 – VO 8 1 +VOUT +VIN ULQ-1.5/15-D48, ULQ-1.5/25-D24 & D48 7 +SENSE 6.23(VO – 1.226) 7.64 2 6 5-22 RT (kΩ) = –10.2 –10.2 ON/OFF UP RT DOWN (kΩ) = TRIM LOAD TURNS VO – 1.5 1.5 – VO CONTROL 5 –SENSE ULQ-1.8/15-D48, ULQ-1.8/25-D24 & D48 3 4 7.44(VO – 1.226) 9.12 –VIN –VOUT –10.2 RT (kΩ) = –10.2 RT (kΩ) = DOWN UP 1.8 – VO VO – 1.8 Figure 5. Trim Connections Using A Trimpot ULQ-2/15-D48, ULQ-2/15-D24 & D48 8.28(VO – 1.226) 10.15 –10.2 8 RT (kΩ) = –10.2 RT (kΩ) = UP DOWN 1 +VOUT +VIN 2 – VO VO – 2 7 ULQ-2.5/15-D48, ULQ-2.5/20-D24 & D48 +SENSE 2 ON/OFF 6 10(VO – 1.226) 12.26 TRIM LOAD RT (kΩ) = –10.2 –10.2 CONTROL UP RT DOWN (kΩ) = RTRIM UP VO – 2.5 2.5 – VO 5 –SENSE ULQ-3.3/15-D48, ULQ-3.3/20-D24 & D48 3 4 –VIN –VOUT 13.3(VO – 1.226) 16.31 –10.2 –10.2 RT (kΩ) = RT (kΩ) = UP DOWN VO – 3.3 3.3 – VO Figure 6. Trim Connections To Increase Output Voltages Using Fixed Resistors ULQ-5/15-D24, -D48 8 20.4(VO – 1.226) 25.01 1 +VOUT +VIN –10.2 RT (kΩ) = –10.2 RT UP (kΩ) = DOWN VO – 5 5 – VO 7 +SENSE ULQ-12/8-D24, ULQ-12/10-D48 2 ON/OFF 6 TRIM LOAD CONTROL 49.6(VO – 1.226) 60.45 RTRIM DOWN –10.2 –10.2 RT (kΩ) = RT (kΩ) = UP DOWN 12 – VO 5 VO – 12 –SENSE 3 4 –VIN –VOUT Note: Resistor values are in kΩ. Adjustment accuracy is subject to resistor tolerances and factory-adjusted output accuracy. VO = desired output voltage. Figure 7. Trim Connections To Decrease Output Voltages Using Fixed Resistors www.murata-ps.com/support MDC_ULQ-15A.E05 Page 6 of 17 ULQ Models Single Output, Low-Profile, Quarter-Brick 8-25 Amp Isolated DC-DC Converters Trim-Up Resistance vs. Percentage Increase in Output Voltage Model ULQ-2.5 Model ULQ-1.5 7 1 x 10 7 1 x 10 6 1 x 10 6 1 x 10 5 1 x 10 5 1 x 10 4 1 x 10 4 1 x 10 3 1 x 10 01 23 45 678 910 01 23 45 678 910 VOUT INCREASE (%) VOUT INCREASE (%) Model ULQ-3.3 Model ULQ-1.8 7 7 1 x 10 1 x 10 6 6 1 x 10 1 x 10 5 5 1 x 10 1 x 10 4 4 1 x 10 1 x 10 01 23 45 678 910 01 23 45 678 910 VOUT INCREASE (%) VOUT INCREASE (%) Trim-Down Resistance vs. Percentage Decrease Model ULQ-2 7 1 x 10 in Output Voltage 7 1 x 10 Model ULQ-1.5 Model ULQ-1.8 Model ULQ-2 6 1 x 10 Model ULQ-2.5 6 1 x 10 Model ULQ-3.3 5 1 x 10 5 1 x 10 4 1 x 10 01 23 45 678 910 4 1 x 10 VOUT INCREASE (%) 02 46 8101214161820 VOUT DECREASE (%) www.murata-ps.com/support MDC_ULQ-15A.E05 Page 7 of 17 RESISTANCE RESISTANCE RESISTANCE RESISTANCE RESISTANCE RESISTANCE ULQ Models Single Output, Low-Profile, Quarter-Brick 8-25 Amp Isolated DC-DC Converters On/Off Control ("P" or "N" suffix) The input-side, remote On/Off Control function (pin 2) can be ordered to operate with either logic type: +VIN 1 +VCC "P" suffix: Standard models are equipped with Positive-logic and these devices are enabled when pin 2 is left open (or is pulled high, applying +3.5V 2 to +13 with respect to –Input, pin 1) as per Figure 8. Positive-logic devices ON/OFF are disabled when pin 2 is pulled low (0 to 0.8V with respect to –Input). CONTROL "N" suffix: Optional Negative-logic devices are off when pin 2 is left open (or pulled high, applying +3.5V to +13V), and on when pin 2 is pulled low (0 to –VIN 3 0.8V) with respect to –Input as shown in Figure 9. Figure 9. Driving the Negative Logic On/Off Control Pin 1 +VIN 13V CIRCUIT Dynamic control of the remote on/off function is best accomplished with 2 a mechanical relay or an open-collector/open-drain drive circuit (optically iso- ON/OFF lated if appropriate). The drive circuit should be able to sink appropriate cur- CONTROL 5V CIRCUIT rent (see Performance Specifications) when activated and withstand appro- priate voltage when deactivated. Applying an external voltage to pin 2 when no input power is applied to the converter can cause permanent damage –VIN 3 to the converter. Figure 8. Driving the Positive Logic On/Off Control Pin Surface-Mount Package ("M" suffix) DATEL is not exempted from the Laws of Physics. And we do not have magic solders no one else has. Nevertheless, we have a simple and practical, DATEL's ULQ series SMT DC-DC converters are the only higher-power (to straightforward approach that works. We assemble our SMT DC-DC's on 66W) DC-DC's that can be automatically "pick-and-placed" using standard a hightemperature, plastic lead-frame (nylon 46, UL94V-0 rated) using a vacuum-pickup equipment and subsequently reflowed using high-tempera- high-temperature (+216°C), lead-free alloy (Sn96.2%, Ag2.5%, Cu0.8%, ture, lead-free solder. Sb0.5%). The lead-frame ensures coplanarity (to within 0.004 in.) of the unit's Virtually all SMT DC-DC's today are unprotected "open-frame" devices tin-plated (150 microinches) copper leads and also supports a removable assembled by their vendors with high-temperature solder (usually Sn96.5/ heat shield. Ag3.5 with a melting point +221°C) so that you may attach them to your The disposable heat shield, which has a cutaway exposing the package board using low-temperature solder (usually Sn63/Pb37 with a melting point leads, provides thermal insulation to internal components during reflow and of +183°C). Conceptually straightforward, this "stepped" solder approach has also doubles as the vacuum pick-up location. The insulation properties of the its limitations . . . and is clearly out of step with an industry trending toward heat shield are so effective that temperature differentials as high as 50°C the broad use of lead-free solders. No need to experiment and develop reflow develop inside-to-outside the shield. Oven temperature profiles with peaks of profiles that ensure the components on their DC-DC never exceed 215- 250-260°C and dwell times exceeding 2 minutes above 221°C (the melting 216°C. If those components get too hot, "double-reflow" could compromise point of Sn96.5/Ag3.5) are easily achieved. DATEL's new-generation SMT the reliability of their solder joints. Virtually all these devices demand you units are shipped in stackable, JEDEC-style plastic. "cool down" the Sn63 profile you are likely using today. 250 200 Heat Shield Test Board Air Under Shield 150 100 50 Z1 Z2 Z3 Z4 Z5 Z6 Z7 100 200 300 400 500 600 Seconds Figure 11. Recommended Solder Profile (When The Heat-shield Temperature Exceeds +250°C, The Air Within Is 50°C Cooler) Figure 10. ULQ SMT DC-DC With Disposable Heat Shield www.murata-ps.com/support MDC_ULQ-15A.E05 Page 8 of 17 Degrees Celsius ULQ Models Single Output, Low-Profile, Quarter-Brick 8-25 Amp Isolated DC-DC Converters Typical Performance Curves, 1.5V Models ULQ-1.5/25-D24 Efficiency vs. Line Voltage and Load Current ULQ-1.5/25-D24 Output Current vs. Ambient Temperature 92 (No air flow) 90 30 88 25 86 84 20 VIN = 18V 82 VIN = 18V 15 80 VIN = 24V VIN = 24V 78 10 76 VIN = 36V VIN = 36V 5 74 72 0 –40 0 25 30 35 40 45 50 55 60 65 70 75 80 85  90 95 100 70 2.5 5 7.5 10 12.5 15 17.5 20 22.5 25 Ambient Temperature (°C) Load Current (Amps) ULQ-1.5/15-D48 Efficiency vs. Line Voltage and Load Current ULQ-1.5/15-D48 Output Current vs. Ambient Temperature 92 (No air flow) 90 18 88 86 15 84 82 12 80 VIN = 36V VIN = 36V 78 9 VIN = 48V 76 VIN = 48V 6 74 VIN = 75V 72 3 70 VIN = 75V 68 0 66 –40 0 25 30 35 40 45 50 55 60 65 70 75 80 85  90 95 100 1.5 3 4.5 6 7.5 9 10.5 12 13.5 15 Ambient Temperature (°C) Load Current (Amps) ULQ-1.5/25-D48 Efficiency vs. Line Voltage and Load Current ULQ-1.5/25-D48 91 Output Current vs. Ambient Temperature (VIN = 48V, air flow direction from Input pin to Output pin) 89 30 87 25 85 20 83 0 lfm VIN = 36V 81 15 100 lfm 79 VIN = 48V 10 200 lfm 77 5 VIN = 75V 75 73 0 –40 0 25 30 35 40 45 50 55 60 65 70 75 80 85  90 95 100 2.5 5 7.5 10 12.5 15 17.5 20 22.5 25 Load Current (Amps) Ambient Temperature (°C) www.murata-ps.com/support MDC_ULQ-15A.E05 Page 9 of 17 Efficiency (%) Efficiency (%) Efficiency (%) Output Current (Amps) Output Current (Amps) Output Current (Amps) ULQ Models Single Output, Low-Profile, Quarter-Brick 8-25 Amp Isolated DC-DC Converters Typical Performance Curves, 1.8V Models ULQ-1.8/15-D48 Efficiency vs. Line Voltage and Load Current ULQ-1.8/15-D48 Output Current vs. Ambient Temperature 92 (No air flow) 90 18 88 15 86 84 12 82 VIN = 36V 80 9 VIN = 36V 78 VIN = 48V 76 6 VIN = 48V VIN = 75V 74 3 72 VIN = 75V 70 0 –40 0 25 30 35 40 45 50 55 60 65 70 75 80 85  90 95 100 68 1.5 3 4.5 6 7.5 9 10.5 12 13.5 15 Ambient Temperature (°C) Load Current (Amps) ULQ-1.8/25-D24 Efficiency vs. Line Voltage and Load Current ULQ-1.8/25-D24 92 Output Current vs. Ambient Temperature (No air flow) 90 30 88 86 25 84 20 82 VIN = 18V VIN = 18V 80 15 VIN = 24V 78 VIN = 24V 76 10 74 VIN = 36V VIN = 36V 72 5 70 0 68 –40 0 25 30 35 40 45 50 55 60 65 70 75 80 85  90 95 100 2.5 5 7.5 10 12.5 15 17.5 20 22.5 25 Ambient Temperature (°C) Load Current (Amps) ULQ-1.8/25-D48 Efficiency vs. Line Voltage and Load Current ULQ-1.8/25-D48 92 Output Current vs. Ambient Temperature 90 (VIN = 48V, air flow direction from Input pin to Output pin) 30 88 86 25 84 82 20 80 0 lfm VIN = 36V 15 78 100 lfm 76 VIN = 48V 10 200 lfm 74 72 5 VIN = 75V 70 0 68 –40 0 25 30 35 40 45 50 55 60 65 70 75 80 85  90 95 100 2.1 4.2 6.25 8.3 10.4 12.5 14.6 16.7 18.75 20.8 22.9 25 Load Current (Amps) Ambient Temperature (°C) www.murata-ps.com/support MDC_ULQ-15A.E05 Page 10 of 17 Efficiency (%) Efficiency (%) Efficiency (%) Output Current (Amps) Output Current (Amps) Output Current (Amps) ULQ Models Single Output, Low-Profile, Quarter-Brick 8-25 Amp Isolated DC-DC Converters Typical Performance Curves, 2V Models ULQ-2/15-D48 Efficiency vs. Line Voltage and Load Current ULQ-2/15-D48 Output Current vs. Ambient Temperature 92 (No air flow) 90 18 88 15 86 84 12 82 VIN = 36V 80 VIN = 36V 9 VIN = 48V 78 76 6 VIN = 48V VIN = 75V 74 3 72 VIN = 75V 70 0 –40 0 25 30 35 40 45 50 55 60 65 70 75 80 85  90 95 100 68 1.5 3 4.5 6 7.5 9 10.5 12 13.5 15 Ambient Temperature (°C) Load Current (Amps) ULQ-2/25-D24 Efficiency vs. Line Voltage and Load Current ULQ-2/25-D24 Output Current vs. Ambient Temperature 92 (No air flow) 90 30 88 25 86 84 20 VIN = 18V 82 VIN = 18V 15 80 VIN = 24V VIN = 24V 78 10 76 VIN = 36V VIN = 36V 5 74 72 0 –40 0 25 30 35 40 45 50 55 60 65 70 75 80 85  90 95 100 70 2.5 5 7.5 10 12.5 15 17.5 20 22.5 25 Ambient Temperature (°C) Load Current (Amps) ULQ-2/25-D48 Efficiency vs. Line Voltage and Load Current ULQ-2/25-D48 92 Output Current vs. Ambient Temperature (VIN = 48V, air flow direction from Input pin to Output pin) 90 30 88 25 86 84 20 0 lfm 82 VIN = 36V 15 100 lfm 80 78 200 lfm VIN = 48V 10 76 74 5 VIN = 75V 72 0 70 –40 0 22 26 30 34 38 42 46 50 54 58 62 66 70  74 78 82 86 90 2.5 5 7.5 10 12.5 15 17.5 20 22.5 25 Ambient Temperature (°C) Load Current (Amps) www.murata-ps.com/support MDC_ULQ-15A.E05 Page 11 of 17 Efficiency (%) Efficiency (%) Efficiency (%) Output Current (Amps) Output Current (Amps) Output Current (Amps) ULQ Models Single Output, Low-Profile, Quarter-Brick 8-25 Amp Isolated DC-DC Converters Typical Performance Curves, 2.5V Models ULQ-2.5/15-D48 Efficiency vs. Line Voltage and Load Current ULQ-2.5/15-D48 Output Current vs. Ambient Temperature 94 (VIN = 48V, air flow direction from Input pin to Output pin) 18 92 90 15 88 86 12 Natural Convection 84 VIN = 36V 9 100 lfm 82 200 lfm 80 6 VIN = 48V 300 lfm 78 400 lfm 3 76 VIN = 75V 74 0 –40 0 25 30 35 40 45 50 55 60 65 70 75 80 85  90 95 100 72 1.5 3 4.5 6 7.5 9 10.5 12 13.5 15 Ambient Temperature (°C) Load Current (Amps) ULQ-2.5/20-D48 Efficiency vs. Line Voltage and Load Current ULQ-2.5/20-D48 93 Output Current vs. Ambient Temperature (VIN = 48V, air flow direction from Input pin to Output pin) 91 25 89 20 87 VIN = 36V 15 85 100 lfm VIN = 48V 200 lfm 83 10 300 lfm 81 VIN = 75V 5 400 lfm 79 0 77 –40 0 25 30 35 40 45 50 55 60 65 70 75 80 85  90 95 100  2 4 6 8 10 12 14 16 18 20 Load Current (Amps) Ambient Temperature (°C) ULQ-2.5/20-D24 Power Dissipation vs. Load Current 11 10 9 VIN = 36V 8 VIN = 24V 7 VIN = 18V 6 5 4 3 2 1 2 4 6 8 10 12 14 16 18 20 22 Load Current (Amps) www.murata-ps.com/support MDC_ULQ-15A.E05 Page 12 of 17 Efficiency (%) Efficiency (%) Power Dissipation (Watts) Output Current (Amps) Output Current (Amps) ULQ Models Single Output, Low-Profile, Quarter-Brick 8-25 Amp Isolated DC-DC Converters Typical Performance Curves, 3.3V Models ULQ-3.3/15-D48 Efficiency vs. Line Voltage and Load Current ULQ-3.3/15-D48 Output Current vs. Ambient Temperature 94 (VIN = 48V, air flow direction from Input pin to Output pin) 18 90 15 86 12 Natural Convection 9 100 lfm 82 VIN = 36V 200 lfm 6 300 lfm 78 VIN = 48V 400 lfm 3 74 VIN = 75V 0 –40 0 25 30 35 40 45 50 55 60 65 70 75 80 85  90 95 100 70 Ambient Temperature (°C)  1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Load Current (Amps) ULQ-3.3/20-D24 Efficiency vs. Line Voltage and Load Current ULQ-3.3/20-D24 Output Current vs. Ambient Temperature 93 (VIN = 24V, air flow direction from Input pin to Output pin) 25 91 89 20 87 VIN = 18V 15 85 VIN = 24V 0 lfm 10 83 100 lfm 81 VIN = 36V 200 lfm 5 400 lfm 79 0 –40 0 25 30 35 40 45 50 55 60 65 70 75 80 85  90 95 100 77  2 4 6 8 10 12 14 16 18 20 Ambient Temperature (°C) Load Current (Amps) ULQ-3.3/20-D48 Efficiency vs. Line Voltage and Load Current ULQ-3.3/20-D48 Output Current vs. Ambient Temperature 93 (VIN = 48V, air flow direction from Input pin to Output pin) 25 91 20 89 87 15 VIN = 36V 100 lfm 85 VIN = 48V 200 lfm 10 83 300 lfm 81 VIN = 75V 5 79 0 –40 0 25 30 35 40 45 50 55 60 65 70 75 80 85  90 95 100 77  2 4 6 8 10 12 14 16 18 20 Ambient Temperature (°C) Load Current (Amps) www.murata-ps.com/support MDC_ULQ-15A.E05 Page 13 of 17 Efficiency (%) Efficiency (%) Efficiency (%) Output Current (Amps) Output Current (Amps) Output Current (Amps) ULQ Models Single Output, Low-Profile, Quarter-Brick 8-25 Amp Isolated DC-DC Converters Typical Performance Curves, 5V Models ULQ-5/15-D48N Efficiency Vs. Line Voltage And Load Current ULQ-5/15-D48N Maximum Output Current vs. Ambient Temperature 90.0 (VIN = 48V, air flow direction from Input pin to Output pin) 16 80.0 15 Vin = 36V 14 Vin = 48V 70.0 100 lfm 13 Vin = 60V 200 lfm 60.0 12 Vin = 75V 300 lfm 11 400 lfm 50.0 10 9 40.0 –40 0 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 1.5 3 4.5 6 7.5 9 10.5 12 13.5 15 Ambient Temperature (°C) Load Current (Amps) www.murata-ps.com/support MDC_ULQ-15A.E05 Page 14 of 17 Output Current (Amps) Efficiency (%) ULQ Models Single Output, Low-Profile, Quarter-Brick 8-25 Amp Isolated DC-DC Converters Typical Performance Curves, 12V Models ULQ-12/8-D24N ULQ-12/8-D24 Efficiency vs. Line Voltage and Load Current @25°C Maximum Output Current vs. Ambient Temperature 95 (VIN = 24V, transverse air flow direction from –Output to +Output pin) 9 8 90 7 6 0 lfm 85 5 200 lfm VIN = 18V 4 400 lfm 80 VIN = 24V 3 600 lfm 2 VIN = 36V 75 1 0 –40 0 25 30 35 40 45 50 55 60 65 70 75 80 85 90 70 Ambient Temperature (°C) 0.8 1.6 2.4 3.2 4 4.8 5.6 6.4 7.2 8 Load Current (Amps) ULQ-12/10-D48N ULQ-12/10-D48 Efficiency vs. Line Voltage and Load Current @25°C Output Current vs. Ambient Temperature 95 (VIN = 48V, air flow direction from Input pin to Output pin) 10.5 10 90 500 lfm 9.5 9 85 8.5 100 lfm VIN = 36V 8 200 lfm 80 VIN = 48V 7.5 300 lfm 7 VIN = 75V 75 6.5 6 –40 0 22 26 30 34 38 42 46 50 54 58 62 66 70  74 78 82 86 90 70 1 2 3 4 5 6 7 8 9 10 Ambient Temperature (°C) Load Current (Amps) ULQ-12/10-D48 Power Dissipation vs. Load Current 19 17 VIN = 75V 15 13 VIN = 48V 11 VIN = 36V 9 7 5 3 1 1 2 3 4 5 6 7 8 9 10 Load Current (Amps) www.murata-ps.com/support MDC_ULQ-15A.E05 Page 15 of 17 Efficiency (%) Power Dissipation (Watts) Efficiency (%) Output Current (Amps) Output Current (Amps) ULQ Models Single Output, Low-Profile, Quarter-Brick 8-25 Amp Isolated DC-DC Converters SMT For the surface mount versions of the ULQ, use the Recommended SMT Pad SMT Unit Lead Layout illustration as a starting point to locate pads to mount the converter. 0.020 (0.51) This diagram is for the pads on the mating printed circuit board—it is not PCB the dimensions of the lead terminals on the converter. Note: the pads are slightly larger than the lead terminals to accomodate solder wetting and Copper Pad meniscus. Also, your particular application may require some deviation from this diagram. 2.340 (59.44) 1.975 (50.17) 0.183 (4.65) 0.130 * (3.30) * 0.150 TYP. 0.020 REF. (3.81) (0.51) * These two pads are for alignment and positioning only. They are not required for electrical contact. Recommended SMT Pad Layout PART NUMBER STR UCTURE U LQ - 3.3 / 20 - D48 N M Lx - C Output Output RoHS-6 Hazardous Configuration: Configuration: Substance Compliant U = Unipolar U = Unipolar Pin Length Option: Through-hole packages only Quarter-Brick Package L1 Pin length 0.110 ±0.010 inches (2.79 ±0.25mm) ➀ Nominal Output Voltage: L2 Pin length 0.145 ±0.010 inches (3.68 ±0.25mm) ➀ 1.2,1.5, 1.8, 2, 2.5, 3.3, 5, 12 Volts Blank is standard pin length Maximum Rated Output : Surface-Mount Package ➁ ➂ Current in Amps Remote On/Off Control Logic Input Voltage Range: Add "P" for positive logic D24 = 18-36 Volts (24V nominal) (pin 2 open = converter on) D48 = 36-75 Volts (48V nominal) Add "N" for negative logic (pin 2 open = converter off) Positive logic is standard for D24 models. Nega- tive logic is standard for D48 models. Alternate logic may require a special order. ➀ Special quantity order is required; samples available with standard pin length only. ➁ SMT (M) versions not available in sample quantities. ➂ See list on pg. 2 using the C40 SMT package. ➃ Some model number combinations may not be available. See website or contact your local Murata sales representative. www.murata-ps.com/support MDC_ULQ-15A.E05 Page 16 of 17 ULQ Models Single Output, Low-Profile, Quarter-Brick 8-25 Amp Isolated DC-DC Converters MECHANICAL SPECIFICATIONS 2.30 (58.4) A 0.375 MAX. 2.22 (56.4) A OVERALL DIMENSIONS : (9.53) 2.30 (58.4) x 1.45 (36.8) x 0.70 (17.8) BEFORE REMOVAL OF PROTECTIVE HEAT SHIELD PINS 1-3, 5-7: 0.040 ±0.001 0.35 PROTECTIVE 0.125 (1.016 ±0.025) PLASTIC STANDOFFS (8.9) HEAT SHIELD (3.2) PINS 4, 8: ARE RELIEVED 0.030 (0.76) 0.062 ±0.001 IN SOLDER JOINT AREA 0.125 MIN. (1.575 ±0.025) (3.2) Case C40 0.150 2.00 (50.8) A (3.81) 3Surface-mount Package 4 5 See page 16 for the 2 6 recommneded pad 7 layout dimensions. 4 1 8 3 0.600 0.110 5 (15.2) (2.79) 2 6 0.300 (7.6) 7 BOTTOM VIEW 0.600 (15.2) 1 8 4 EQ. SP. @ 0.150 (3.81) 0.600 (15.2) 0.300 (7.6) BOTTOM VIEW 0.600 (15.2) 4 EQ. SP. Case C37, Through-Hole Package @ 0.150 (3.81) DOSA-Compatible I/O Connections Dimensions are in inches (mm) shown for ref. only. Pin Function P32 Pin Function P32 Third Angle Projection 1 +Vin 5 –Sense 2 Remote On/Off* 6 Trim 3 –Vin 7 +Sense 4 –Vout 8 +Vout Tolerances (unless otherwise specified): * The Remote On/Off can be provided with either positive ("P" suffix) .XX ± 0.02 (0.5) or negative ("N" suffix) logic. .XXX ± 0.010 (0.25) Angles ± 2˚ Components are shown for reference only. This product is subject to the following operating requirements Murata Power Solutions, Inc. and the Life and Safety Critical Application Sales Policy: 129 Flanders Road, Westborough, MA 01581 U.S.A. Refer to: http://www.murata-ps.com/requirements/ ISO 9001 and 14001 REGISTERED 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. © 2018 Murata Power Solutions, Inc. www.murata-ps.com/support MDC_ULQ-15A.E05 Page 17 of 17 B B 1.35 (34.3) B B B 1.45 (36.8) B