UQQ Series Wide Input Range Single Output DC/DC Converters For applications requiring wide range input, improved electrical and thermal perfomance consider Murata Power Solutions’ new UQQ Series “Quarter-Brick” DC/DC Converters. They measure just 1.45 x 2.22 x 0.43 inches (36.8 x 56.4 x 10.92mm) and fit the industrystandard footprint. Typical unit FEATURES PRODUCT OVERVIEW RoHS compliant From an 9-36V or 18-75V input, UQQ’s deliver outputs of 3.3V, 5V,12V,15V, or 24V. They employ an interleaved, synchronous-rectifier topology that exploits 100% of their duty cycle. They simultaneously achieve ultra-high efficiency (to 90%), tight line/load regulation, low noise, and quick step response. The UQQ’s feature set includes high isolation, input pi filters, input undervoltage shutdown, output overvoltage protection, current limiting, short-circuit protection and thermal shutdown. The standard footprint carries on/off control (positive or negative polarity), output trim (+10/–20%) and output sense functions. A state of the art, single-board, open-frame design with reduced component count, high efficiency, low-on-resistance FET’s, and planar magnetics embedded in heavy-copper pc boards all contribute to impressive thermal derating. All UQQ quarter-bricks are designed with full magnetic and optical isolation up to 2250 Volts DC (basic insulation). Standard quarter-brick package/pinout in through-hole version Low cost; Low profile, 0.43”(10.92mm) 9-36V or 18-75V wide range inputs Output current: 4 to 25 Amps Output voltages: 3.3, 5, 12, 15 or 24V Interleaved synchronous-rectifier topology Ultra high efficiency No output reverse conduction Outstanding thermal performance On/off control, trim & sense functions Fully isolated, up to 2250Vdc (48 VIN) SIMPLIFIED SCHEMATIC 6/54 Output overvoltage protection Fully I/O protected; Thermal shutdown Designed to meet UL/EN/IEC60950-1 safety approvals 3%.3% 6). n6/54 RoHS hazardous substance compliant n3%.3% 37)4#( #/.42/, n6). /./&& #/.42/, 07- #/.42/,,%2 /04/ )3/,!4)/. )NPUTUNDEROVERVOLTAGE CURRENTSENSEOVER TEMPERATURE#OMPARATORS )3/,!4)/. "!22)%2 2%&%2%.#% %22/2!-0 42)- Typical topology is shown. For full details go to www.murata-ps.com/rohs www.murata-ps.com Technical enquiries email: [email protected], tel: +1 508 339 3000 MDC_UQQ.A10 Page 1 of 17 UQQ Series Wide Input Range Single Output DC/DC Converters Performance Specifications and Ordering Guide ~ PERFORMANCE SPECIFICATIONS AND ORDERING GUIDE Output Input R/N (mVp-p) Load VIN Nom. (Volts) Range (Volts) Min. Typ. Package (Case/ Pinout) ±0.125% 12 9-36 180 7.81 86% 88% C68,P32 ±0.2% 48 18-75 80 2.01 86% 88% C68,P32 Regulation Root Model 5 VOUT (V) IOUT (A) Power (Watts) Typ. Max. Line UQQ-3.3/25-Q12P-C 3.3 25 82.5 50 80 ±0.05% UQQ-3.3/25-Q48N-C 3.3 25 82.5 80 125 ±0.05% IIN, no load IIN, full load (mA) (A) Efficiency UQQ-5/17-Q12P-C 5 17 85 40 75 ±0.05% ±0.06% 12 9-36 150 7.83 88.5% 90.5% C68,P32 UQQ-5/20-Q48N-C 5 20 100 100 140 ±0.05% ±0.165% 48 18-75 65 2.47 82.5% 84.5% C68,P32 UQQ-12/8-Q12P-C 12 8 96 40 75 ±0.05% ±0.05% 12 9-36 180 8.99 87% 89% C68,P32 UQQ-12/8-Q48N-C 12 8 96 95 150 ±0.05% ±0.1% 48 18-75 70 2.3 87.5% 89.5% C68,P32 UQQ-15/7-Q12P-C 15 7 105 56 100 ±0.05% ±0.1% 12 9-36 250 9.67 89% 90.5% C68,P32 UQQ-24/4-Q12P-C 24 4 96 125 170 ±0.05% ±0.075% 12 10-36 120 8.99 87.7 89% C68,P32 1 Typical at TA = +25°C under nominal line voltage and full-load conditions. All models are specified with an external 1μF multi-layer ceramic and 10μF capacitors across their output pins and 100μF external input capacitor. 2 Ripple/Noise (R/N) measured over a 20MHz bandwidth. 3 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%.) 4 Nominal line voltage, no load/full load condition. 5 Please refer to the Part Number Structure for additional part numbers and options. PART NUMBER STRUCTURE U QQ - 5 / 17 - Q12 N B 9 Lx - C RoHS-6 hazardous substance compliant (please include this designator for all models) Output Configuration Quarter-Brick Package Pin Length Option Blank = Std. pin length Alternate pin lengths require quantity order. L1 = 0.110 (2.79mm) L2 = 0.145 (3.68mm) Baseplate Pin 9 (special order): Blank = No pin 9, standard 9 = Pin 9 installed, connects to baseplate } Nominal Output Voltage Maximum Rated Output Input Voltage Range Q12 = 9-36V Q48 = 18-75V Remote On/Off Control Polarity: Add "P" for positive polarity Add "N" for negative polarity Baseplate (optional): Blank = no baseplate standard B = baseplate installed, special order Some model options may require minimum order quantities. Note: Some model number combinations may not be available. Contact Murata Power Solutions. Pin 9 Baseplate Connection The UQQ series may include an optional installed baseplate for extended thermal management. This baseplate is electrically isolated from the rest of the converter. Various UQQ models are also available with an additional pin 9 on special quantity order which electrically connects to the baseplate. Pin 9 is also isolated from the rest of the converter. Please refer to the mechanical drawings. The baseplate may be ordered by adding a “B” to the model number tree and pin 9 will be pre-installed by adding a “9”. The two options are separate. Please refer to the Ordering Guide. Do not order pin 9 without the baseplate. Note that “pin 9” converters may be on limited forecast, requiring minimum order quantities and scheduled deliveries. Pin 9 offers a positive method of controlling the electrical potential of the baseplate, independent of the converter. If you do not include pin 9, the baseplate may also be grounded by the mounting bolts. Please see page 9 for heatsink information. www.murata-ps.com Technical enquiries email: [email protected], tel: +1 508 339 3000 MDC_UQQ.A10 Page 2 of 17 UQQ Series Wide Input Range Single Output DC/DC Converters MECHANICAL SPECIFICATIONS 56.4 2.22 4.76 .187 12.7 .50 0.25 .010 MIN BOTTOM CLEARANCE 23.6 .93 REF 36.8 1.45 END VIEW WITH BASEPLATE CL 4X M3X0.5 THRU , .10" MAX PENETRATION (4 PLS) 47.24 1.860 10.9 .43 13.08 .515 REF 26.16 1.030 CL TOP VIEW OPTIONAL BASEPLATE 'B' OPTION END VIEW WITHOUT BASEPLATE SIDE VIEW INPUT/OUTPUT CONNECTIONS Pin Function P32 1 -Input 2 Remote On/Off* 3 +Input 4 -Output 5 -Sense 6 Output Trim 7 +Sense 8 +Output 9 Baseplate (optional) * The Remote On/Off can be provided with either positive ("P" suffix) or negative ("N" suffix) polarity. Important! Always connect the sense pins; see Application Notes. 50.80 2.000 1.02±0.05 .040±.002 AT PINS 1-3, 5-7, (9) 1.57±0.05 2X .062±.002 AT PINS 4 & 8 25.4 1.00 REF 3.81 .150 3.81 .150 CL 18.42 .725 REF CL .071±.002 [1.80] VENTED SHOULDER .040 PIN ON EACH Third Angle Projection 7.62 .300 8 7 6 5 4 Dimensions are in inches (mm shown for ref. only). 3 2 9 CL 1 7.62 .300 BOTTOM VIEW Optional pin #9 Connects to baseplate And is electrically isolated from converter Tolerances (unless otherwise specified): .XX ± 0.02 (0.5) .XXX ± 0.010 (0.25) Angles ± 2˚ Components are shown for reference only. Soldering Guidelines Murata Power Solutions recommends the specifications below when installing these converters. These specifications vary depending on the solder type. Exceeding these specifications may cause damage to the product. Be cautious when there is high atmospheric humidity. We strongly recommend a mild pre-bake (100° C. for 30 minutes). Your production environment may differ; therefore please thoroughly review these guidelines with your process engineers. Wave Solder Operations for through-hole mounted products (THMT) For Sn/Ag/Cu based solders: For Sn/Pb based solders: Maximum Preheat Temperature 115° C. Maximum Preheat Temperature 105° C. Maximum Pot Temperature 270° C. Maximum Pot Temperature 250° C. Maximum Solder Dwell Time 7 seconds Maximum Solder Dwell Time 6 seconds www.murata-ps.com Technical enquiries email: [email protected], tel: +1 508 339 3000 MDC_UQQ.A10 Page 3 of 17 UQQ Series Wide Input Range Single Output DC/DC Converters Performance and Functional Specifications UQQ-3.3/25-Q12 UQQ-3.3/25-Q48 UQQ-5/17-Q12 UQQ-5/20-Q48 UQQ-12/8-Q12 17.50 Volts 16.75 Volts None 15mAp-p See ordering guide 9.0 Volts 8.0 Volts 37.5 Volts 75mAp-p 17.5 Volts 15.75 Volts (IOUT = ØA) None 80mAp-p 9.0 Volts 8.0 Volts 37.5 Volts 75mAp-p 250mA 150mA 10.4 Amps 100mA 80mA 5.18 Amps See ordering guide 0.1A2sec 100mA 150mA 10.44 Amps 50mA 65mA 6.24 Amps 250mA 180mA 12.12 Amps 8mA 2mA 8mA 5mA 5mA LC Yes (15) Pi-type NA L-C Yes (15) L-C Yes (15) L-C Yes (15) INPUT Input Voltage Range Start-up Threshold Undervoltage Shutdown Overvoltage Shutdown Reflected (back) ripple current (2) Input Current Full load conditions Inrush transient Output short circuit No load Low line (VIN = min.) Standby mode (Off, UV, OT shutdown) Internal Input Filter Type Reverse Polarity Protection 9.0 Volts 8.0 Volts 37.5 Volts 25mAp-p Remote On/Off Control (5) Positive logic (“P” suffix) OFF = Ground pin to +0.8V max. ON = open or +3.5-15V max. Negative logic (“N” suffix) OFF = open or +5 to +VIN max. ON = Ground pin to +0.8V max. (16) On/Off Current 1 mA 1 mA 1 mA 1mA 1 mA –20 to +10% of VNOM –20 to +10% of VNOM OUTPUT Voltage Output Range See ordering guide Voltage Output Accuracy (50% load) Adjustment Range ±1% of VNOM ±10% of VNOM ±10% of VNOM ±0.02% of VOUT range/°C Temperature Coefficient Minimum Loading Remote Sense Compensation Ripple/noise (20MHz bandwidth) Line/Load Regulation Efficiency Maximum Capacitive Loading Low ESR <0.02Ω max., resistive load Isolation Voltage Input to Output Input fo baseplate Baseplate to output Isolation resistance Isolation capacitance Isolation safety rating Current limit inception (98% of VOUT, after warmup) Short Circuit Protection Method Short Circuit Current Short Circuit Duration Overvoltage Protection via magnetic feedback –20 to +10% of VNOM No minimum load +10% See ordering guide 10,000μF 4700μF 10,000μF 10,000μF 4700μF 2000 VDC min. 1500 VDC min. 1500 VDC min. 100MΩ 1500 pF 2250 VDC min. 1500 VDC min. 500 VDC min. 100MΩ 1000 pF 2000 VDC min. 1500 VDC min. 750 VDC min. 100MΩ 1000 pF Basic insulation 2250 VDC min. 1500 VDC min. 1500 VDC min. 100MΩ 1500pF 2250 VDC min. 1500 VDC min. 750 VDC min. 100MΩ 1000 pF 30 Amps 29 Amps 20.5 Amps 27 Amps 9.5 Amps 5 Amps Current limiting, hiccup autorestart. Remove overload for recovery. 5 Amps 3 Amps 0.5 Amps Continuous, output shorted to ground (no damage) 0.5 Amps 4 Volts 3.96 Volts max. 14.4 Volts www.murata-ps.com 6 Volts 6 Volts Technical enquiries email: [email protected], tel: +1 508 339 3000 MDC_UQQ.A10 Page 4 of 17 UQQ Series Wide Input Range Single Output DC/DC Converters Performance and Functional Specifications (continued) UQQ-12/8-Q48 UQQ-15/7-Q12 UQQ-24/4-Q12 INPUT Input Voltage Range Start-up Threshold Undervoltage Shutdown Overvoltage Shutdown Reflected (back) ripple current (2) Input Current Full load conditions Inrush transient Output short circuit No load Low line (VIN = min.) Standby mode (Off, UV, OT shutdown) Internal Input Filter Type Reverse Polarity Protection Remote On/Off Control (5) Positive logic (“P” suffix) Negative logic (“N” suffix) 17.5 Volts 16.0 Volts None 15mAp-p See ordering guide 9.0 Volts 8.0 Volts 38.5 Volts 50mAp-p 9.0 Volts 8.0 Volts None 50mAp-p 100mA 70mA 5.93A See ordering guide 0.1A2sec 250mA 250mA 12.9 Amps 250mA 120mA 10.73 Amps 2mA 5mA 5mA PI-type NA L-C Yes (15) L-C Yes (15) OFF = Ground pin to +0.8V max. ON = open or +3.5-15V max. OFF = open or +5 to +VIN max. ON = Ground pin to +0.8V max. (16) On/Off Current 1 mA OUTPUT Voltage Output Range See ordering guide Voltage Output Accuracy (50% load) ±1.25% of VNOM ±1% of VNOM ±1% of VNOM Adjustment Range –20 to +10% of VNOM –20 to +10% of VNOM ±10% of VNOM Temperature Coefficient Minimum Loading Remote Sense Compensation Ripple/noise (20MHz bandwidth) Line/Load Regulation Efficiency Maximum Capacitive Loading Low ESR <0.02Ω max., resistive load Isolation Voltage Input to Output Input fo baseplate Baseplate to Output Isolation resistance Isolation capacitance Isolation safety rating Current limit inception (98% of VOUT, after warmup) Short Circuit Protection Method Short Circuit Current ±0.02% of VOUT range/°C +10% See ordering guide 2200μF 4700μF 1500μF max 2250 VDC min. 1500 VDC min. 500 VDC min. 100MΩ 1000 pF 2000 VDC min. 1500 VDC min. 1500 VDC min. 100MΩ 1000 pF Basic insulation 2000 VDC min. 1500 VDC min. 1500 VDC min. 100MΩ 1000 pF 12 Amps 9.5 Amps 5.75 Amps Current limiting, hiccup autorestart. Remove overload for recovery 0.1 Amps 0.5 Amps 0.5 Amps Short Circuit Duration Overvoltage Protection via magnetic feedback No minimum loading +10% +10% Continuous, output shorted to ground (no damage) 15 Volts 18 Volts www.murata-ps.com 29 Volts Technical enquiries email: [email protected], tel: +1 508 339 3000 MDC_UQQ.A10 Page 5 of 17 UQQ Series Wide Input Range Single Output DC/DC Converters UQQ-3.3/25-Q12 UQQ-3.3/25-Q48 UQQ-5/17-Q12 UQQ-5/20-Q48 UQQ-12/8-Q12 50μsec to ±1% of final value 100μsec to ±1% of final value 50μsec to ±1% of final value VIN to VOUT regulated 10msec 10msec max Remote On/Off to VOUT regulated 5msec 5msec max Switching frequency 255 ±25kHz 255 ±25kHz UQQ-12/8-Q48 UQQ-15/7-Q12 UQQ-24/4-Q12 95μsec to ±1% of final value 50μsec to ±1% of final value 50μsec to ±2% of final value 20msec 10msec 10msec 245 ±20kHz 260 ±25kHz 260 ±25kHz –40 to +100°C –40 to +105°C –40 to +105°C DYNAMIC CHARACTERISTICS Dynamic Load Response (50-75-50% load step) Start-up Time 10msec 25msec 10msec 5msec 260 ±25kHz 225-265kHz 260 ±25kHz ENVIRONMENTAL Calculated MTBF (4) TBC Operating Temperature Range See Derating curves Operating Temperature Range with baseplate (no Derating required) (3)(14) –40 to +85ºC with Derating –40 to +105ºC –40 to +100ºC –40 to +105°C Storage Temperature Range –40 to +105ºC –40 to +105°C –55 to +125ºC Thermal Protection/Shutdown +120ºC, measured at thermistor T1 Relative humidity To +85°C/85% non-condensing PHYSICAL Outline dimensions See mechanical specifications Baseplate material Aluminum Pin material Copper alloy Pin diameter 0.04/0.062 inches, 1.016/1.524 mm Weight Electromagnetic interference (conducted, external filter required) Safety 1 ounce (28 grams) Designed to meet FCC part 15, class B, EN55022 Designed to meet UL/cUL 60950-1, CSA-C22.2 No.60950-1, IEC/EN 60950-1 Flammability UL 94V-0 Specification Notes: (1) All models are tested and specified with 300 lfm airflow, external 1 and 10μF paralleled ceramic/ tantalum output capacitors and a 100μF external input capacitor. All capacitors are low ESR types. These capacitors are necessary to accommodate our test equipment and may not be required in your applications. All models are stable and regulate within spec under no-load conditions. General conditions for Specifications are +25°C, VIN = nominal, VOUT = nominal, full load unless noted. (2) Input Ripple Current is tested and specified over a 5Hz to 20MHz bandwidth. Input filtering is CIN = 33μF tantalum, CBUS = 220μF electrolytic, LBUS = 12μH. (3) Note that Maximum Power Derating curves indicate an average current at nominal input voltage. At higher temperatures and/or lower airflow, the DC/DC converter will tolerate brief full current outputs if the total RMS current over time does not exceed the Derating curve. All Derating curves are presented at sea level altitude. Be aware of reduced power dissipation with increasing altitude. (4) Mean Time Before Failure is calculated using the Telcordia (Belcore) SR-332 Method 1, Case 3, ground fixed conditions, TPCBOARD = +25°C, full output load, natural air convection. (5) The On/Off Control may be driven with external logic or by applying appropriate external voltages which are referenced to Input Common. The On/Off Control Input should use either an open collector/open drain transistor or logic gate. (6) Short circuit shutdown begins when the output voltage degrades approximately 2% from the selected setting. (7) The outputs are not intended to sink appreciable reverse current. www.murata-ps.com (8) Output noise may be further reduced by adding an external filter. See I/O Filtering and Noise Reduction. (9) All models are fully operational and meet published specifications, including “cold start” at –40°C. On-board component package temperatures must not exceed +128°C. (10) Regulation specifications describe the deviation as the line input voltage or output load current is varied from a nominal midpoint value to either extreme. (11) Alternate pin length and/or other output voltages are available under special quantity order. (12) Overvoltage shutdown on 48V input models can be eliminated under special quantity order. OV shutdown can be deleted in order to comply with certain telecom reliability requirements. These requirements attempt continued operation despite significant input overvoltage. (13) Do not exceed maximum power specifications when adjusting the output trim. (14) Note that the converter may operate up to +105°C with the baseplate installed (+100°C for the UQQ-3.3/25-Q48). However, thermal self-protection occurs near +120°C Therefore, +105°C is recommended to avoid thermal shutdown. (15) If reverse polarity is accidentally applied to the input, to ensure reverse input protection, always connect an external input fuse in series with the +VIN input. Use approximately twice the full input current rating with nominal input voltage. (16) For On/Off Control on negative-polarity UQQ-3.3/25-Q48N models, the maximum OFF mode control voltage is +13.5 Volts. For the ON mode, the range is pin grounded to +1 Volt max. (17) Always connect the sense pins. If they are not connected to a remote load, connect each sense pin to its respective output at the converter pins. Technical enquiries email: [email protected], tel: +1 508 339 3000 MDC_UQQ.A10 Page 6 of 17 UQQ Series Wide Input Range Single Output DC/DC Converters Absolute Maximum Ratings Input Voltage Continuous Transient (100msec) 12V models 0 to +36V +50V 48V models 0 to +75V +100V On/Off Control 0V min to +13.5V max. Input Reverse Polarity Protection See Fuse section Output Overvoltage VOUT +20% max. Output Current (7) Current-limited. Devices can withstand sustained short circuit without damage. Storage Temperature –55 to +125°C Lead Temperature See soldering guidelines Absolute maximums are stress ratings. Exposure of devices to greater than any of these conditions may adversely affect long-term reliability. Proper operation under conditions other than those listed in the Performance/Functional Specifications Table is not implied nor recommended. Technical Notes Removal of Soldered UQQ’s from Printed Circuit Boards They should be selected for bulk capacitance (at appropriate frequencies), low ESR, and high rms-ripple-current ratings. The switching nature of DC/DC converters requires that dc voltage sources have low ac impedance as highly inductive source impedance can affect system stability. In Figure 2, CBUS and LBUS simulate a typical dc voltage bus. Your specific system configuration may necessitate additional considerations. In critical applications, output ripple/noise (also referred to as periodic and random deviations or PARD) can be reduced below specified limits using filtering techniques, the simplest of which is the installation of additional external output capacitors. Output capacitors function as true filter elements and should be selected for bulk capacitance, low ESR, and appropriate frequency response. In Figure 3, the two copper strips simulate real-world pcb impedances between the power supply and its load. Scope measurements should be made using BNC connectors or the probe ground should be less than ½ inch and soldered directly to the fixture. All external capacitors should have appropriate voltage ratings and be located as close to the converter as possible. Temperature variations for all relevant parameters should be taken into consideration. OS-CONTM organic semiconductor capacitors (www.sanyo.com) can be especially effective for further reduction of ripple/noise. The most effective combination of external I/O capacitors will be a function of line voltage and source impedance, as well as particular load and layout conditions. Should removal of the UQQ from its soldered connection be needed, thoroughly de-solder the pins using solder wicks or de-soldering tools. At no time should any prying or leverage be used to remove boards that have not been properly de-soldered first. +SENSE Input Source Impedance +OUTPUT UQQ converters must be driven from a low ac-impedance input source. The DC/DC’s performance and stability can be compromised by the use of highly inductive source impedances. The input circuit shown in Figure 2 is a practical solution that can be used to minimize the effects of inductance in the input traces. For optimum performance, components should be mounted close to the DC/DC converter. I/O Filtering, Input Ripple Current, and Output Noise All models in the UQQ Series are tested/specified for input ripple current (also called input reflected ripple current) and output noise using the circuits and layout shown in Figures 2 and 3. External input capacitors (CIN in Figure 2) serve primarily as energy-storage elements. TO OSCILLOSCOPE 3 COPPER STRIP 8 C1 C2 SCOPE RLOAD 4 –OUTPUT 5 –SENSE COPPER STRIP C1 = 1μF CERAMIC C2 = 10μF TANTALUM LOAD 2-3 INCHES (51-76mm) FROM MODULE Figure 3. Measuring Output Ripple/Noise (PARD) +INPUT LBUS + VIN CURRENT PROBE 7 CBUS CIN – 1 –INPUT CIN = 33μF, ESR < 700m7 @ 100kHz CBUS = 220μF, ESR < 100m7 @ 100kHz LBUS = 12μH Figure 2. Measuring Input Ripple Current www.murata-ps.com Technical enquiries email: [email protected], tel: +1 508 339 3000 MDC_UQQ.A10 Page 7 of 17 UQQ Series Wide Input Range Single Output DC/DC Converters Start-Up Threshold and Undervoltage Shutdown Under normal start-up conditions, the UQQ Series will not begin to regulate properly until the ramping input voltage exceeds the Start-Up Threshold. Once operating, devices will turn off when the applied voltage drops below the Undervoltage Shutdown point. Devices will remain off as long as the undervoltage condition continues. Units will automatically re-start when the applied voltage is brought back above the Start-Up Threshold. The hysteresis built into this function avoids an indeterminate on/off condition at a single input voltage. See Performance/Functional Specifications table for actual limits. should not be allowed to exceed 0.5V. Consider using heavier wire if this drop is excessive. Sense is connected at the load and corrects for resistive errors only. Be careful where it is connected. Any long, distributed wiring and/or significant inductance introduced into the Sense control loop can adversely affect overall system stability. If in doubt, test the application, and observe the DC/DC’s output transient response during step loads. There should be no appreciable ringing or oscillation. You may also adjust the output trim slightly to compensate for voltage loss in any external filter elements. Do not exceed maximum power ratings. Start-Up Time Current Limiting The VIN to VOUT Start-Up Time is the interval between the point at which a ramping input voltage crosses the Start-Up Threshold voltage and the point at which the fully loaded output voltage enters and remains within its specified accuracy band. Actual measured times will vary with input source impedance, external input capacitance, and the slew rate and final value of the input voltage as it appears to the converter. The On/Off to VOUT start-up time assumes that the converter is turned off via the Remote On/Off Control with the nominal input voltage already applied. When power demands from the output falls within the current limit inception range for the rated output current, the DC/DC converter will go into a current limiting mode. In this condition the output voltage will decrease proportionately with increases in output current, thereby maintaining a somewhat constant power dissipation. This is commonly referred to as power limiting. Current limit inception is defined as the point where the fullpower output voltage falls below the specified tolerance. If the load current being drawn from the converter is significant enough, the unit will go into a short circuit condition. See “Short Circuit Condition.” On/Off Control The primary-side, Remote On/Off Control function (pin 2) can be specified to operate with either positive or negative polarity. Positive-polarity devices ("P" suffix) are enabled when pin 2 is left open or is pulled high. Positivepolarity devices are disabled when pin 2 is pulled low (with respect to –Input). Negative-polarity devices are off when pin 2 is high and on when pin 2 is pulled low. See Figure 4 Dynamic control of the remote on/off function is best accomplished with a mechanical relay or an open-collector/open-drain drive circuit (optically isolated if appropriate). The drive circuit should be able to sink appropriate current (see Performance Specifications) when activated and withstand appropriate voltage when deactivated. ).054 %15)6!,%.4#)2#5)4&/2 0/3)4)6%!.$.%'!4)6% ,/')#-/$%,3 6 /./&& #/.42/, #/.42/, n).054 When a converter is in current limit mode the output voltages will drop as the output current demand increases. If the output voltage drops too low, the magnetically coupled voltage used to develop primary side voltages will also drop, thereby shutting down the PWM controller. Following a time-out period of about 50 milliseconds, the PWM will restart, causing the output voltages to begin ramping to their appropriate values. If the short-circuit condition persists, another shutdown cycle will be initiated. This on/off cycling is referred to as “hiccup” mode. The hiccup cycling reduces the average output current, thereby preventing internal temperatures from rising to excessive levels. The UQQ is capable of enduring an indefinite short circuit output condition. Thermal Shutdown UQQ converters are equipped with thermal-shutdown circuitry. If the internal temperature of the DC/DC converter rises above the designed operating temperature (See Performance Specifications), a precision temperature sensor will power down the unit. When the internal temperature decreases below the threshold of the temperature sensor, the unit will self start. Output Overvoltage Protection 2%& Short Circuit Condition #/--/. Figure 4. Driving the Remote On/Off Control Pin Sense Input Note: The sense and VOUT lines are internally connected through low-value resistors. Nevertheless, if sense is not used for remote regulation, the user must connect + sense to + VOUT and -sense to -VOUT at the converter pins. Sense is intended to correct small output accuracy errors caused by the resistive ohmic drop in output wiring as output current increases. This output drop (the difference between Sense and VOUT when measured at the converter) www.murata-ps.com The output voltage is monitored for an overvoltage condition via magnetic coupling to the primary side. If the output voltage rises to a fault condition, which could be damaging to the load circuitry (see Performance Specifications), the sensing circuitry will power down the PWM controller causing the output voltage to decrease. Following a time-out period the PWM will restart, causing the output voltage to ramp to its appropriate value. If the fault condition persists, and the output voltages again climb to excessive levels, the overvoltage circuitry will initiate another shutdown cycle. This on/off cycling is referred to as “hiccup” mode. Technical enquiries email: [email protected], tel: +1 508 339 3000 MDC_UQQ.A10 Page 8 of 17 UQQ Series Wide Input Range Single Output DC/DC Converters Input Reverse-Polarity Protection 1 If the input-voltage polarity is accidentally reversed, an internal diode will become forward biased and likely draw excessive current from the power source. If the source is not current limited or the circuit appropriately fused, it could cause permanent damage to the converter. +OUTPUT –INPUT +SENSE 2 ON/OFF CONTROL TRIM –SENSE 3 7 6 LOAD RTRIM UP Input Fusing Certain applications and/or safety agencies may require the installation of fuses at the inputs of power conversion components. Fuses should also be used if the possibility of a sustained, non-current-limited, input-voltage polarity reversal exists. For MPS UQQ Series DC/DC Converters, slow-blow fuses are recommended with values no greater than twice the maximum input current. 8 +INPUT –OUTPUT 5 4 Figure 5. Trim Connections To Increase Output Voltages Using Fixed Resistors Trimming Output Voltage UQQ converters have a trim capability (pin 6) that enables users to adjust the output voltage from +10% to –20% (refer to the trim equations). Adjustments to the output voltage can be accomplished with a single fixed resistor as shown in Figures 5 and 6. A single fixed resistor can increase or decrease the output voltage depending on its connection. Resistors should be located close to the converter and have TCR’s less than 100ppm/°C to minimize sensitivity to changes in temperature. If the trim function is not used, leave the trim pin open. Standard UQQ’s have a "positive trim" where 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 the –Sense (pin 5) will decrease the output voltage. Trim adjustments greater than the specified +10%/–20% can have an adverse affect on the converter’s performance and are not recommended. Excessive voltage differences between VOUT and Sense, in conjunction with trim adjustment of the output voltage, can cause the overvoltage protection circuitry to activate (see Performance Specifications for overvoltage limits). Temperature/power derating is based on maximum output current and voltage at the converter’s output pins. Use of the trim and sense functions can cause output voltages to increase, thereby increasing output power beyond the UQQ’s specified rating, or cause output voltages to climb into the output overvoltage region. Therefore: 1 +SENSE 2 ON/OFF CONTROL TRIM 3 8 7 6 LOAD RTRIM DOWN –SENSE +INPUT –OUTPUT 5 4 Figure 6. Trim Connections To Decrease Output Voltages Using Fixed Resistors Trim Up Trim Down UQQ-3.3/25-Q12, UQQ-3.3/25-Q48 RT UP (k7) = 13.3(VO – 1.226) –10.2 VO – 3.3 RTDOWN (k7) = 16.31 3.3 – VO –10.2 UQQ-5/17-Q12, UQQ-5/20-Q48 RT UP (k7) = (VOUT at pins) x (IOUT) ≤ rated output power The Trim pin (pin 6) is a relatively high impedance node that can be susceptible to noise pickup when connected to long conductors in noisy environments. In such cases, a 0.22μF capacitor to –Output can be added to reduce this long lead effect. +OUTPUT –INPUT 20.4(VO – 1.226) –10.2 VO – 5 RTDOWN (k7) = 25.01 5 – VO –10.2 UQQ-12/8-Q12, UQQ-12/8-Q48 RT UP (k7) = 49.6(VO – 1.226) –10.2 VO – 12 RTDOWN (k7) = 60.45 12 – VO –10.2 UQQ-15/7-Q12 RT UP (k7) = 62.9(VO – 1.226) –10.2 VO – 15 RTDOWN (k7) = 76.56 15 – VO –10.2 UQQ-24/4-Q12 RT UP (k7) = www.murata-ps.com 101 × (VO – 1.226) VO – 24 –10.2 RTDOWN (k7) = 124.2 24 – VO –10.2 Technical enquiries email: [email protected], tel: +1 508 339 3000 MDC_UQQ.A10 Page 9 of 17 UQQ Series Wide Input Range Single Output DC/DC Converters UQQ Series Aluminum Heatsink Thermal Performance Please note – The UQQ series shares the same heatsink kits as the UVQ series. Therefore, when ordering these heat sinks, use the model numbers below which end with the ‘UVQ’ suffix. The UQQ series converter baseplate can be attached either to an enclosure wall or a heatsink to remove heat from internal power dissipation. The discussion below concerns only the heatsink alternative. The UQQ’s are available with a low-profile extruded aluminum heatsink kit, models HS-QB25-UVQ, HS-QB50-UVQ, and HS-QB100-UVQ. This kit includes the heatsink, thermal mounting pad, screws and mounting hardware. See the assembly diagram below. Do not overtighten the screws in the tapped holes in the converter. This kit adds excellent thermal performance without sacrificing too much component height. See the Mechanical Outline Drawings for assembled dimensions. If the thermal pad is firmly attached, no thermal compound (“thermal grease”) is required. The HS-QB25-UVQ heatsink has a thermal resistance of 12 degrees Celsius per Watt of internal heat dissipation with “natural convection” airflow (no fans or other mechanical airflow) at sea level altitude. This thermal resistance assumes that the heatsink is firmly attached using the supplied thermal pad and that there is no nearby wall or enclosure surface to inhibit the airflow. The thermal pad adds a negligible series resistance of approximately 0.5°C/Watt so that the total assembled resistance is 12.5°C/Watt. When assembling these kits onto the converter, include ALL kit hardware to assure adequate mechanical capture and proper clearances. Thread relief is 0.090" (2.3mm). Be aware that we need to handle only the internal heat dissipation, not the full power output of the converter. This internal heat dissipation is related to the efficiency as follows: Power Dissipation [Pd] = Power In – Power Out [1] Power Out / Power In = Efficiency [in %] / 100 [2] Power Dissipation [Pd] = Power In x (1 –Efficiency%/100) [3] Power Dissipation [Pd] = Power Out x (1 / (Efficiency%/100) - 1) [4] Efficiency of course varies with input voltage and the total output power. Please refer to the Performance Curves. 0!.(%!$3#2%7 -8-0,#3 Since many applications do include fans, here is an approximate equation to calculate the net thermal resistance: RΘ [at airflow] = RΘ [natural convection] / (1 + (Airflow in LFM) x [Airflow Constant]) [5] ,/#+7!3(%2 - 0,#3 &,!47!3(%2 ./ 0,#3 (%!43).+ (%!442!.3&%20!$ 0EELOFFWHITEPLASTIC BACKINGMATERIALBEFORE ATTACHINGTOHEATSINK Figure 7. Model UQQ Heatsink Assembly Diagram www.murata-ps.com Where, RΘ [at airflow] is the net thermal resistance (in °C/W) with the amount of airflow available and, RΘ [natural convection] is the still air total path thermal resistance or in this case 12.5°C/Watt and, “Airflow in LFM” is the net air movement flow rate immediately at the converter. This equation simplifies an otherwise complex aerodynamic model but is a useful starting point. The “Airflow Constant” is dependent on the fan and enclosure geometry. For example, if 200 LFM of airflow reduces the effective natural convection thermal resistance by one half, the airflow constant would be 0.005. There is no practical way to publish a “one size fits all” airflow constant because of variations in airflow direction, heatsink orientation, adjacent walls, enclosure geometry, etc. Each application must be determined empirically and the equation is primarily a way to help understand the cooling arithmetic. This equation basically says that small amounts of forced airflow are quite effective removing the heat. But very high airflows give diminishing returns. Conversely, no forced airflow causes considerable heat buildup. At zero airflow, cooling occurs only because of natural convection over the heatsink. Natural convection is often well below 50 LFM, not much of a breeze. While these equations are useful as a conceptual aid, most users find it very difficult to measure actual airflow rates at the converter. Even if you know the velocity specifications of the fan, this does not usually relate directly to the enclosure geometry. Be sure to use a considerable safety margin doing thermal analysis. If in doubt, measure the actual heat sink temperature with a calibrated thermocouple, RTD or thermistor. Safe operation should keep the heat sink below 100°C. Technical enquiries email: [email protected], tel: +1 508 339 3000 MDC_UQQ.A10 Page 10 of 17 UQQ Series Wide Input Range Single Output DC/DC Converters Calculating Maximum Power Dissipation Heat Sink Example To determine the maximum amount of internal power dissipation, find the ambient temperature inside the enclosure and the airflow (in Linear Feet per Minute – LFM) at the converter. Determine the expected heat dissipation using the Efficiency curves and the converter Input Voltage. You should also compensate for lower atmospheric pressure if your application altitude is considerably above sea level. Assume an efficiency of 92% and power output of 100 Watts. Using equation [4], Pd is about 8.7 Watts at an input voltage of 48 Volts. Using +30°C ambient temperature inside the enclosure, we wish to limit the heat sink temperature to +90°C maximum baseplate temperature to stay well away from thermal shutdown. The +90°C. figure also allows some margin in case the ambient climbs above +30°C or the input voltage varies, giving us less than 92% efficiency. The heat sink and airflow combination must have the following characteristics: The general proceedure is to compute the expected temperature rise of the heatsink. If the heatsink exceeds +100°C. either increase the airflow and/or reduce the power output. Start with this equation: Internal Heat Dissipation [Pd in Watts] = (Ts – Ta)/RΘ [at airflow] [6] where “Ta” is the enclosure ambient air temperature and, where “Ts” is the heatsink temperature and, where “RΘ [at airflow]” is a specific heat transfer thermal resistance (in degrees Celsius per Watt) for a particular heat sink at a set airflow rate. We have already estimated RΘ [at airflow] in the equations above. Note particularly that Ta is the air temperature inside the enclosure at the heatsink, not the outside air temperature. Most enclosures have higher internal temperatures, especially if the converter is “downwind” from other heat-producing circuits. Note also that this “Pd” term is only the internal heat dissipated inside the converter and not the total power output of the converter. We can rearrange this equation to give an estimated temperature rise of the heatsink as follows: 8.7 W = (90-30) / RΘ[airflow] or, RΘ[airflow] = 60/8.7 = 6.9°C/W Since the ambient thermal resistance of the heatsink and pad is 12.5°C/W, we need additional forced cooling to get us down to 6.9°C/W. Using a hypothetical airflow constant of 0.005, we can rearrange equation [5] as follows: (Required Airflow, LFM) x (Airflow Constant) = RΘ[Nat.Convection] / RΘ[at airflow] –1, or, (Required Airflow, LFM) x (Airflow Constant) = 12.5/6.9 –1 = 0.81 and, rearranging again, (Required Airflow, LFM) = 0.81/0.005 = 162 LFM 162 LFM is the minumum airflow to keep the heatsink below +90°C. Increase the airflow to several hundred LFM to reduce the heatsink temperature further and improve life and reliability. Ts = (Pd x RΘ [at airflow]) + Ta [7] Heatsink Kit * Model Number Still Air (Natural convection) thermal resistance Heatsink height (see drawing) HS-QB25-UVQ 12°C/Watt 0.25" (6.35mm) HS-QB50-UVQ 10.6°C/Watt 0.50" (12.7mm) HS-QB100-UVQ 8°C/Watt 1.00" (25.4mm) 2.28 (57.91) 1.860 (47.24) * Kit includes heatsink, thermal pad and mounting hardware. 1.03 1.45 (26.16) (36.83) These model numbers are correct for the UQQ series. 0.140 DIA. (3.56) (4 PLACES) * MATERIAL: BLACK ANODIZED ALUMINUM 0.10 (2.54) * UQQ SERIES HEATSINKS ARE AVAILABLE IN 3 HEIGHTS: 0.25 (6.35), 0.50 (12.70) AND 1.00 (25.4) Dimensions in inches (mm) Optional Heatsink www.murata-ps.com Technical enquiries email: [email protected], tel: +1 508 339 3000 MDC_UQQ.A10 Page 11 of 17 UQQ Series Wide Input Range Single Output DC/DC Converters Typical Performance Curves UQQ-3.3/25-Q12 Efficiency vs. Line Voltage and Load Current @ 25°C UQQ-3.3/25-Q48P Efficiency vs. Line Voltage and Load Current @ 25ºC 90 90 88 88 86 84 84 VIN = 12V 82 VIN = 18V 80 VIN = 24V 82 Efficiency (%) Efficiency (%) 86 VIN = 18V 80 VIN = 24V 78 VIN = 36V 76 74 VIN = 48V 72 VIN = 30V 78 VIN = 60V 70 VIN = 36V VIN = 72V 68 76 66 74 64 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 2 4 6 8 10 Load Current (Amps) 12 14 16 18 20 22 24 26 Load Current (Amps) UQQ-3.3/25-Q12P Maximum Current Temperature Derating (no baseplate, VIN = 12V, air flow is transverse) UQQ-3.3/25-Q12PB Maximum Current Temperature Derating (with baseplate, VIN = 12V, air flow is transverse) 25 25.0 24.5 24.5 Natural Convection Natural Convection Output Current (Amps) Output Current (Amps) 24 23.5 23 22.5 22 100 lfm 21.5 21 200 lfm 20.5 20 300 lfm 19.5 24.0 100 lfm 23.5 23.0 22.5 200 lfm 22.0 21.5 300 lfm 21.0 19 20.5 18.5 400 lfm 20.0 18 20 25 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature (°C) 20 25 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature (°C) UQQ-3.3/25-Q48 Maximum Current Temperature Derating at sea level (VIN = 48V, with baseplate, transverse air flow) 26 25 Output Current (Amps) 24 23 22 21 20 19 18 Natural Convection 100 LFM 17 200 LFM 300 LFM 16 15 400 LFM 14 13 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 Ambient Temperature (°C) www.murata-ps.com Technical enquiries email: [email protected], tel: +1 508 339 3000 MDC_UQQ.A10 Page 12 of 17 UQQ Series Wide Input Range Single Output DC/DC Converters Typical Performance Curves 51110 %FFICIENCYVS,INE6OLTAGEAND,OAD#URRENT # 51110 0OWER$ISSIPATIONVS,OAD#URRENT # 0OWER$ISSIPATION7ATTS %FFICIENCY 6).6 6).6 6).6 6).6 6).6 6).6 6).6 6).6 6).6 6).6 ,OAD#URRENT!MPS UQQ-5/17-Q12P Maximum Current Temperature Derating No baseplate, VIN = 12V (transverse air flow at sea level) 75 80 UQQ-5/17-Q12P Maximum Current Temperature Derating With baseplate, VIN = 12V (transverse air flow at sea level) 17 17 16 16 400 lfm Output Current (Amps) Output Current (Amps) ,OAD#URRENT!MPS 300 lfm 15 14 Natural Convection 13 100 lfm 12 25 35 30 45 40 50 Natural Convection 14 100 lfm 200 lfm 13 300 lfm 12 200 lfm 11 –40 15 55 65 60 70 75 80 400 lfm 11 –40 85 25 30 35 Ambient Temperature (°C) 70 65 60 55 50 45 40 85 Ambient Temperature (°C) UQQ-5/20-Q48P Efficiency vs. Line Voltage and Load Current @ 25°C UQQ-5/20-Q48 Maximum Current Temperature Derating at sea level (VIN = 48V, with baseplate, transverse airflow) 20 90 Output Current (Amps) 19 85 Efficiency (%) VIN = 75V VIN = 60V 80 VIN = 48V VIN = 36V 75 70 18 17 16 15 Natural Convection 100 lfm 200 lfm 300 lfm 14 VIN = 24V 13 VIN = 18V 12 400 lfm 11 20 65 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 Ambient Temperature (°C) Load Current (Amps) www.murata-ps.com Technical enquiries email: [email protected], tel: +1 508 339 3000 MDC_UQQ.A10 Page 13 of 17 UQQ Series Wide Input Range Single Output DC/DC Converters Typical Performance Curves 51110 %FFICIENCYVS,INE6OLTAGEAND,OAD#URRENT 5111 0OWER$ISSIPATIONVS,OAD#URRENT # 0OWER$ISSIPATION7ATTS %FFICIENCY # 6).6 6).6 6).6 6).6 6).6 6).6 6).6 6).6 6).6 6).6 ,OAD#URRENT!MPS 8.0 7.5 7.5 7.0 Output Current (Amps) Output Current (Amps) 8.0 6.5 6.0 100 lfm 5.0 200 lfm Natural Convection 7.0 6.5 6.0 Natural Convection 5.5 100 lfm 200 lfm 5.0 300 lfm 4.5 UQQ-12/8-Q12P Maximum Current Temperature Derating With baseplate, VIN = 12V (transverse air flow at sea level) UQQ-12/8-Q12P Maximum Current Temperature Derating (no baseplate, VIN = 12V, air flow is transverse) 5.5 ,OAD#URRENT!MPS 300 lfm 400 lfm 4.5 400 lfm 4.0 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 4.0 –40 25 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature (°C) Ambient Temperature (°C) www.murata-ps.com Technical enquiries email: [email protected], tel: +1 508 339 3000 MDC_UQQ.A10 Page 14 of 17 UQQ Series Wide Input Range Single Output DC/DC Converters Typical Performance Curves UQQ-12/8-Q48P Maximum Current Temperature Derating (With baseplate, VIN = 48V transverse air flow at sea level) UQQ-12/8-Q48P Efficiency vs. Line Voltage and Load Current @ 25°C 92 8 90 7.5 Output Current (Amps) 88 Efficiency (%) 86 84 VIN = 18V 82 VIN = 36V 80 VIN = 48V 6.5 6 100 lfm 5.5 200 lfm 300 lfm 5 VIN = 75V 78 7 400 lfm 4.5 76 Natural Convection 4 74 1 2 3 4 5 6 7 8 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 Ambient Temperature (°C) Load Current (Amps) UQQ-12/8-Q48P Maximum Current Temperature Derating (With baseplate, VIN = 24V, transverse air flow at sea level) 8 Output Current (Amps) 7.5 7 6.5 100 lfm 6 200 lfm 300 lfm 5.5 400 lfm 5 Natural Convection 4.5 4 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 Ambient Temperature (°C) www.murata-ps.com Technical enquiries email: [email protected], tel: +1 508 339 3000 MDC_UQQ.A10 Page 15 of 17 UQQ Series Wide Input Range Single Output DC/DC Converters Typical Performance Curves 51110 %FFICIENCYVS,INE6OLTAGEAND,OAD#URRENT # 51110 0OWER$ISSIPATIONVS,OAD#URRENT # 0OWER$ISSIPATION7ATTS %FFICIENCY 6).6 6).6 6).6 6).6 6).6 6).6 6).6 6).6 6).6 6).6 ,OAD#URRENT!MPS ,OAD#URRENT!MPS UQQ-15/7-Q12P Maximum Current Temperature Derating With baseplate, VIN = 12V (transverse air flow at sea level) 7 400 lfm 6.5 Output Current (Amps) 300 lfm 6 5.5 5 4.5 Natural Convection 100 lfm 200 lfm 4 3.5 –40 25 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature (°C) www.murata-ps.com Technical enquiries email: [email protected], tel: +1 508 339 3000 MDC_UQQ.A10 Page 16 of 17 UQQ Series Wide Input Range Single Output DC/DC Converters Typical Performance Curves UQQ-24/4-Q12P Efficiency vs. Line Voltage and Load Current @ 25°C UQQ-24/4-Q12P Power Dissipation vs. Load Current @ 25°C 93 14 VIN = 36V 13 92 VIN = 12V 90 89 VIN = 24V 88 VIN = 30V VIN = 24V 11 Power Dissipation (Watts) VIN = 10V 91 Efficiency (%) VIN = 30V 12 VIN = 12V 10 VIN = 10V 9 8 7 6 5 4 87 VIN = 36V 3 86 1 2 3 2 4 2 1 Load Current (Amps) 3 4 Load Current (Amps) UQQ-24/4-Q12P Maximum Current Temperature Derating No baseplate, VIN = 12V (transverse air flow at sea level) UQQ-24/4-Q12P Maximum Current Temperature Derating With baseplate, VIN = 12V (transverse air flow at sea level) 4 4 3.8 3.8 400 lfm 400 lfm 300 lfm 3.6 Output Current (Amps) Output Current (Amps) 3.6 3.4 3.2 300 lfm 3 2.8 2.6 3.4 3.2 3 Natural Convection 2.8 2.6 100 lfm Natural Convection 2.4 2.4 100 lfm 2.2 200 lfm 2.2 200 lfm 2 2 20 25 30 35 40 45 50 55 60 65 70 75 80 85 20 Ambient Temperature (°C) 25 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature (°C) USA: Murata Power Solutions, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A. Tel: (508) 339-3000 (800) 233-2765 Fax: (508) 339-6356 www.murata-ps.com email: [email protected] ISO 9001 and 14001 REGISTERED 12/15/08 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. © 2008 Murata Power Solutions, Inc. www.murata-ps.com Mansfield (MA), Tel: (508) 339-3000, email: [email protected] Canada: Toronto, Tel: (866) 740-1232, email: [email protected] UK: Milton Keynes, Tel: +44 (0)1908 615232, email: [email protected] France: Montigny Le Bretonneux, Tel: +33 (0)1 34 60 01 01, email: [email protected] Germany: München, Tel: +49 (0)89-544334-0, email: [email protected] Japan: Tokyo, Tel: 3-3779-1031, email: [email protected] Osaka, Tel: 6-6354-2025, email: [email protected] China: Shanghai, Tel: +86 215 027 3678, email: [email protected] Guangzhou, Tel: +86 208 221 8066, email: [email protected] Singapore: Parkway Centre, Tel: +65 6348 9096, email: [email protected] Technical enquiries email: [email protected], tel: +1 508 339 3000 MDC_UQQ.A10 Page 17 of 17