MURATA POWER SOLUTIONS UQQ Series Wide Input Range Single Output DC/DC Converters
Contents
1. Output Input r 5 Es ackage R N mVp p Regulation Range Im no load Iw full load Efficiency Case Root Model Typ Max Line Load Volts mA A Min Typ Pinout UQQ 3 3 25 012 50 80 0 05 0 075 9 36 180 7 81 86 88 C68 P32 UQQ 3 3 25 048 50 100 0 05 0 2 18 75 80 1 942 87 88 5 C68 P32 UQQ 5 17 Q12 5 40 75 0 05 0 06 9 36 150 7 83 88 5 90 5 C68 P32 UQQ 5 20 048 5 40 75 0 05 0 1 18 75 150 2 29 89 5 91 C68 P32 UQQ 12 8 Q12 40 75 0 05 0 05 9 36 180 8 99 87 89 C68 P32 UQQ 12 8 048 75 0 05 0 1 18 75 90 2 3 87 88 5 C68 P32 UQQ 15 7 Q12 40 75 0 05 0 1 9 36 250 9 67 89 90 5 C68 P32 UQQ 24 4 012 TBD TBD 9 36 TBD TBD TBD TBD C68 P32 Typical at TA 25 C under nominal line voltage and full load conditions All models are Devices have no minimum load requirements and will regulate under no load conditions specified with an external 1uF multi layer ceramic and 10pF capacitors across their output pins Regulation specifications describe the output voltage deviation as the line voltage or load is and 100pF external input capacitor varied from its nominal midpoint value to either extreme Load step 50 Ripple Noise R N measured over a 20MHz bandwidth Nominal line voltage no load full load condition These are incomplete part numbers refer to the part number structure when ordering PART NUMBER STRUCTURE Ai DEO Output Configuration RoH2. TECHNICAL NOTES Removal of Soldered UQQ s from Printed Circuit Boards Should removal of the UQQ from its soldered connection be needed thor oughly 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 Input Source Impedance 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 induct ance in the input traces For optimum performance components should be mounted close to the DC DC converter 1 0 Filtering Input Ripple Current and Output Noise All models in the UQQ Series are tested specified for input ripple cur rent also called input reflected ripple current and output noise using the circuits and layout shown in Figures 2 and 3 TO OSCILLOSCOPE CURRENT INPUT Cin 33pF ESR lt 700mQ 100kHz Ceus 220uF ESR lt 100mQ 100kHz Laus 12uH Figure 2 Measuring Input Ripple Current Wide Input Range Single Output DC DC Converters External input capacitors Cin in Figure 2 serve primarily as energy stor age elements They should be selected for bulk capacitance at appropriate frequencies low ESR and high rms ripple current ratings The switching
3. 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 Current 1mA 1 mA 1 mA 1mA 1 mA 1 mA 1mA Voltage Output Range See ordering guide Voltage Output Accuracy 1 of Vnom 1 25 of Vnom 1 of Vnom 1 of Vnom 1 of Vnom 1 of Vnom 1 25 of Vnom 50 load 50 load 50 load 50 load 50 load 50 load 50 load Adjustment Range 20 to 10 of 15to 10 of 20to0 1096 0f 20t0 1096 0f 20to 10 0f 20to 10 0f 20 to 10 of Vnom Vnom Vnom Vnom Vnom Vnom Vnom Temperature Coefficient 0 02 of 0 02 of 0 02 of 0 02 of 0 02 of 0 02 of 0 02 of Vout range C Vout range C Vout range C Vout range C Vout range C Vour range C Vour range C Minimum Loading No minimum load Remote Sense Compensation 10 10 10 10 10 10 10 Ripple noise 20MHz bandwidth Line Load Regulation See ordering guide Efficiency Maximum Capacitive Loading 10 000pF 4700F 10 000pF 10 000pF 4700F 2200F 4700pF Low ESR lt 0 02Q max resistive load Isolation Voltage Input to Output 2000 Volts min 2250 Volts min 2000 Volts min 2250 Wolts min 2250 Volts min 2250 Volts min 2000 Volts min Input fo baseplate 1500 Volts min 1500 Volts min 1500 Volts min 1500 Volts min 1500 Volts min 1500 Volts min 1500 Volts min Baseplate to output 1500 Volts min 500 Volts min 750 Volts min 750 Volts min 750 Volts min 500 Volts
4. 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 E gt o I o S W 74 12345267298 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Load Current Amps UQQ 3 3 25 Q12P Maximum Current Temperature Derating no baseplate Vin 12V air flow is transverse 254 24 5 24 Natural Convection g 5r 100 ifm B 2 22 5 t S 22 200 ifm 3 215 o 5 21 5 205 o 20 300 lfm 19 5 19 18 5 400 lfm 18 20 25 30 35 40 45 50 55 60 65 370 75 80 8 Ambient Temperature C UQQ 5 17 Q12P Efficiency vs Line Voltage and Load Current 25 C c x Vin 9V o 4 S T Vin 12V t u Vin 24V T 1 ViN 30V Vin 36V 17 34 54 6 8 8 5 Load Current Amps 10 2 119 Efficiency Output Current Amps N co Power Dissipation Watts UQQ 3 3 25 Q48P Efficiency vs Line Voltage and Load Current 25 C Load Current Amps UQQ 3 3 25 Q12PB Maximum Current Temperature Derating with baseplate Vin 12V air flow is transverse Natural Convection 300 If
5. interference conducted and radiated external filter required FCC part 15 class B EN55022 Safety UL cUL 60950 CSA C22 2 No 60950 IEC EN 60950 Flammability UL 94V 0 Specification Notes 1 2 3 4 5 6 All models are tested and specified with 300 Ifm airflow external 1 Il 10uF ceramic tan talum output capacitors and a 100pF external input capacitor All capacitors are low ESR 7 The outputs are not intended to sink appreciable reverse current Sinking excessive reverse current may damage the outputs 8 Output noise may be further reduced by adding an external filter See 1 0 Filtering and Noise types These capacitors are necessary to accommodate our test equipment and may not be Reduction required to achieve specified performance in your applications All models are stable and 9 All models are fully operational and meet published specifications including cold start at regulate within spec under no load conditions 40 C General conditions for Specifications are 25 C Vin nominal Vout nominal full load unless noted Input Ripple Current is tested and specified over a 5Hz to 20MHz bandwidth Input filtering is Cin 33yF tantalum Csus 220yF electrolytic Leus 12pH 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 curre
6. nature of DC DC converters requires that dc voltage sources have low ac impedance as highly inductive source impedance can affect system stabil ity In Figure 2 Caus and Leus 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 72 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 CON organic semiconductor capacitors www sanyo com can be especially effective for further reduction of ripple noise The most effective combination of external 1 0 capacitors will be a function of line voltage and source impedance as well as particular load and layout conditions Our Applications Engineers can recommen
7. of final value 50 75 50 50 75 50 50 75 50 50 75 50 50 75 50 50 75 50 50 75 50 load step load step load step load step load step load step load step Start up Time Vin to Vour regulated 10msec 50msec max 10msec 10msec 10msec 20msec 10msec Remote On Off to Vour regulated 5msec 50msec max 5msec 5msec 5msec 5msec 5msec Switching frequency 255 25kHz 200 20kHz 260 25kHz 255 25kHz 260 25kHz 245 20kHz 260 25kHz TBC TBC Operating Temperature Range 40 to 65 40 to 70 C 40 to 67 C 40 to 30 C 40 to 46 C 40 to 57 C 40 to 52 C Ambient No baseplate 300 Ifm 200LFM with no derating vertical mount basplate With derating See Derating curves Operating Temperature Range 40 to 105 C 40 to 100 C 40 to 105 C 40 to 105 C 40 to 105 C 40 to 100 C 40 to 105 C with baseplate no derating required 3 14 Storage Temperature Range 55 to 125 C 55 to 125 C 55 to 125 C 55 to 125 C 55 to 125 C 55 to 125 C 55 to 125 C Thermal Protection Shutdown 120 C 120 C 120 C 120 C 120 C 120 C 120 C Relative humidity Outline dimensions To 85 C 85 non condensing See mechanical specifications PHYSICAL Baseplate material Aluminum Pin material Copper alloy Pin diameter 0 04 0 062 inches 1 016 1 524 mm Weight 1 ounce 28 grams Electromagnetic
8. 1 x 13 L 200 Ifm x UQQ 5 17 Q12P Maximum Current Temperature Derating With baseplate Vin 12V transverse air flow at sea level 100 lfm 300 lfm 400 lim 40 25 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature C UQQ 12 8 Q48P Efficiency vs Line Voltage and Load Current 25 C 92 90 88 86 84 Vin 18V 82 Vin 36V 80 Vin 48V 7 78 Vin 75V 4 76 74 1 2 3 4 5 6 7 8 Load Current Amps UQQ 12 8 Q12 Power Dissipation vs Load Current 25 C Vin 75V vin 48V T Vin 36V Vin 18V E 2 N 1 2 3 4 5 6 7 8 Load Current Amps DOATEL DC DC CONVERTERS www cd4power com MDC_UQQ_A02 Page 12 of 14 GED TECHNOLOGIES UQQ Series POWER ELECTRONICS DIVISION Wide Input Range Single Output DC DC Converters UQQ 12 8 Q12P Maximum Current Temperature Derating With baseplate Vin 12V transverse air flow at sea level e tn e o Natural Convection g a 100 Output Current Amps o o A a a o 40 Ambient Temperature C DOATEL DC DC CONVERTERS www cd4power com MDC_UQQ_A02 Page 13 of 14 GED TECHNOLOGIES UQQ Series POWE
9. GED TECHNOLOGIES POWER ELECTRONICS DIVISION Typical unit FEATURES UQQ Series Wide Input Range Single Output DC DC Converters For applications requiring wide range input improved electrical and thermal perfomance consider C amp D s new UQQ Series Quarter Brick DC DC Converters They measure just 1 45 x 2 30 x 0 43 inches 36 8 x 58 4 x 10 92mm and fit the industry standard footprint PRODUCT OVERVIEW E RoHS compliant E Standard quarter brick package pinout in through hole version E Low cost Low profile 0 43 10 92mm m 9 36V or 18 75V wide range inputs E Output current 7 to 25 Amps E Output voltages 3 3 5 12 15 or 24V E Interleaved synchronous rectifier topology m Ultra high efficiency No output reverse conduction Outstanding thermal performance On off control trim amp sense functions E Fully isolated up to 2250Vdc BASIC E Output overvoltage protection E Fully O protected Thermal shutdown m UL EN IEC60950 safety approvals E Designed for ROHS compliance fe RoHS COMPLIANT For full details go to www cd4power com rohs 2002 95 EC 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 simultane ously achieve ultra high efficiency to 91 tight line load regulation low noise an
10. R ELECTRONICS DIVISION Wide Input Range Single Output DC DC Converters Typical Performance Curves UQQ 15 7 Q12P Power Dissipation vs Load Current 25 C Vin 36V Vin 30V Vin 24V Vin 12V Power Dissipation Watts N Vin 9V 1 2 3 4 5 6 7 Load Current Amps CE TECHNOLOGIES C amp D Technologies Inc 11 Cabot Boulevard Mansfield MA 02048 1151 U S A Tel 508 339 3000 800 233 2765 Fax 508 339 6356 www cd4power com email sales cdtechno com ISO 9001 REGISTERED DS 0553 07 03 07 2007 C amp D Technologies Inc C amp D Technologies 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 USA Canada UK France Germany Japan China Tucson Az Tel 800 547 2537 email sales cdtechno com Toronto Tel 866 740 1232 email toronto cdtechno com Milton Keynes Tel 44 0 1908 615232 email mk cdtechno com Montigny Le Bretonneux Tel 33 0 1 34 60 01 01 email france cdtechno com M nchen Tel 49 0 89 544334 0 email ped munich cdtechno com Tokyo Tel 3 3779 1031 email sales_toky
11. S 6 compliant please include this designator for all models Quarter Brick Package Pin Length Option L1 0 110 2 79mm L2 0 145 3 68mm Maximum Rated Output Blank Std pin length Baseplate Note Input Voltage Range B baseplate installed Not all model number Blank no baseplate combinations are Remote On Off Control Polarity Baseplate Pin 9 special order available Add P for positive polarity 9 Pin 9 installed connects to baseplate Contact C amp D Add N for negative polarity Blank No pin 9 Nominal Output Voltage Some model options may require minimum order quantities 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 con verter 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 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 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
12. ad circuitry see Performance Specifica tions 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 DOATEL DC DC CONVERTERS www cd4power com MDC_UQQ_A02 Page 7 of 14 GED TECHNOLOGIES UQQ Series POWER ELECTRONICS DIVISION Input Reverse Polarity Protection 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 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 C amp D UQQ Series DC DC Converters slow blow fuses are recommended with values no greater than twice the maximum input current 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 t
13. age 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 Vour start up time assumes that the converter is turned off via the Remote On Off Control with the nominal input voltage already applied 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 Posi tive polarity 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 EQUIVALENT CIRCUIT FOR POSITIVE AND NEGATIVE LOGIC MODELS INPUT 5V ON OFF CONTROL CONTROL COMMON Figure 4 Driving the Remote On Off Control Pin Sense Input Use the Sense input with caution Many applications do not need the Sense connection Sense is intended to correct small output accurac
14. ceptible to noise pickup when connected to long conductors in noisy environments In such cases a 0 22uF capacitor to Output can be added to reduce this long lead effect Wide Input Range Single Output DC DC Converters OUTPUT SENSE ON OFF CONTROL HARUT OUTPUT OUTPUT SENSE 5 SENSE HINPUT OUTPUT ON OFF CONTROL Figure 6 Trim Connections To Decrease Output Voltages Using Fixed Resistors Trim Up Trim Down UQQ 3 3 25 Q48 13 3 Vo 1 226 16 31 Rr kQ 10 2 Rtpown kQ 10 2 Vo 3 3 3 3 Vo UQQ 5 17 Q12 UQQ 5 20 Q48 20 4 Vo 1 226 Rre KQ 10 2 Vo 5 25 01 Rtpown kQ PES 10 2 UQQ 12 8 Q12 Q48 49 6 Vo 1 226 60 45 Rr KQ 10 2 Rtpown KQ 10 2 Vo 12 12 Vo UQQ 15 7 Q12 62 9 Vo 1 226 76 56 Rr kQ 10 2 Rtpown KQ 10 2 Vo 15 15 Vo DOATEL DC DC CONVERTERS www cd4power com MDC UQQ A02 Page 8 of 14 GED TECHNOLOGIES UQQ Series POWER ELECTRONICS DIVISION UQQ Series Aluminum Heatsink 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 enc
15. d potential solutions and discuss the possibility of our modifying a given device s internal filter ing to meet your specific requirements Contact our Applications Engineer ing Group for additional details SENSE COPPER STRIP ouTPUT t T C1 C2 SCOPE RLoaD 4 1 OUTPUT i 2 5 SENSE COPPER STRIP C1 1pF CERAMIC C2 100F TANTALUM LOAD 2 3 INCHES 51 76mm FROM MODULE Figure 3 Measuring Output Ripple Noise PARD www cd4power com DOATEL DC DC CONVERTERS MDC_UQQ_A02 Page 6 of 14 GED TECHNOLOGIES UQQ Series POWER ELECTRONICS DIVISION 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 Start Up Time 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 volt
16. d quick step response 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 SIMPLIFIED SCHEMATIC The UQQ s feature set includes high isolation input pi filters input undervoltage shutdown output overvoltage protection current limiting short cir cuit protection and thermal shutdown The standard footprint carries on off control positive or negative polarity output trim 10 20 and output sense functions All UQQ quarter bricks are designed to meet the BASIC insulation requirements of UL EN IEC60950 and they will carry the CE mark Safety certifica tions EMC compliance testing and qualification testing including HALT are currently in progress Contact C amp D for latest updates ON OFF o PIM CONTROL CONTROLLER Input under overvoltage current sense over temperature Comparators Typical topology is shown www cd4power com o SENSE O Vour SWITCH 1 CONTROL ISOLATION BARRIER DOATEL DC DC CONVERTERS MDC_UQQ_A02 Page 1 of 14 GED TECHNOLOGIES UQQ Series POWER ELECTRONICS DIVISION aaa Pie oes Loo MI oni Wide Input Range Single Output DC DC Converters PERFORMANCE SPECIFICATIONS AND ORDERING GUIDE
17. for a particular heat sink at a set airflow rate We have already estimated RO 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 Ts Pd x RO at airflow Ta 7 Heatsink Kit Still Air Natural convection thermal resistance Heatsink height see drawing Model Number 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 Kit includes heatsink thermal pad and mounting hardware These model numbers are correct for the UQQ series Wide Input Range Single Output DC DC Converters Heat Sink Example 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 cli
18. he 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 occu0 10lly because of na 10 tural convectiononveg the hea 10 tsins 3 DOATEL DC DC CONVERTERS www cd4power com MDC UQQ A02 Page 9 of 14 GED TECHNOLOGIES UQQ Series POWER ELECTRONICS DIVISION Calculating Maximum Power Dissipation 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 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 RO at airflow 6 where Ta is the enclosure ambient air temperature and where Ts is the heatsink temperature and where RO at airflow is a specific heat transfer thermal resistance in degrees Celsius per Watt
19. he 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 Vour 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 volt 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 the UQQ s specified rating or cause output voltages to climb into the output overvoltage region Therefore Vout at pins x lout lt rated output power The Trim pin pin 6 is a relatively high impedance node that can be sus
20. ipation 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 Efficiency96 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 Since many applications do include fans here is an approximate equation to calculate the net thermal resistance RO at airflow RO natural convection 1 Airflow in LFM x Airflow Constant 5 Where RO at airflow is the net thermal resistance in C W with the amount of airflow available and RO 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 t
21. losure 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 Figure 7 Model UQQ Heatsink Assembly Diagram Wide Input Range Single Output DC DC Converters Thermal Performance 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 Be aware that we need to handle only the internal heat dissipation not the full power output of the converter This internal heat diss
22. m 20 25 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature C UQQ 5 17 Q12P Power Dissipation vs Load Current 25 C Vin 36V I I Vin 30V Vin 24V 17 34 54 6 8 8 5 Load Current Amps DOATEL DC DC CONVERTERS 10 2 11 9 13 6 15 3 17 www cd4power com MDC_UQQ_A02 Page 11 of 14 GED TECHNOLOGIES UQQ Series POWER ELECTRONICS DIVISION Wide Input Range Single Output DC DC Converters Typical Performance Curves UQQ 5 17 Q12P Maximum Current Temperature Derating No baseplate Vin 12V transverse air flow at sea level 16 pee 400 lfm T E 15 300 lfm t g 5 u o 5 2 5 13 Natural Convection 9 100 lfm 12 11 40 235 30 3 40 45 50 55 60 65 70 75 80 85 Ambient Temperature C UQQ 12 8 Q12P Efficiency vs Line Voltage and Load Current 25 C g g o S i W Load Current Amps UQQ 12 8 Q12 Power Dissipation vs Load Current 25 C 12 11 Vin 36V 10 Vin 30V PA l ol Vin 24V E g jp ViN 2 12V c 2 3 7 p Vin 9V 2 E a z 5 o a 4 3 2 1 2 3 4 5 6 7 8 Load Current Amps Efficiency Output Current Amps Power Dissipation Watts 14 H
23. mbs 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 8 7 W 90 30 RO airflow or RO 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 RO Nat Convection Rej 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 a ad 4 1083 145 26 16 36 83 e D 4 L 0 140 DIA 3 56 4 PLACES i MATERIAL BLACK ANODIZED ALUMINUM i 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 DOATEL DC DC CONVERTERS www cd4power com MDC_UQQ_A02 Page 10 of 14 GED TECHNOLOGIES UQQ Series POWER ELECTRONICS DIVISION
24. min 1500 Volts min Isolation resistance 100MQ 100MQ 100MQ 100MQ 100MQ 100MQ 100MQ Isolation capacitance 1500 pF 1000 pF 1500 pF 1500pF 1000 pF 1000 pF 1000 pF Isolation safety rating Basic insulation Basic insulation Basic insulation Basic insulation Basic insulation Basic insulation Basic insulation Current limit inception 29 Amps 29 Amps 20 5 Amps 25 Amps 10 Amps 10 5 Amps 9 5 Amps 98 of Vout after warmup Short Circuit Protection Method Current limiting hiccup autorestart Remove overload for recovery Short Circuit Current 5 Amps 5 Amps 0 5 Amps 5 Amps 0 5 Amps 5 Amps 0 5 Amps Short Circuit Duration Continuous output shorted to ground no damage Overvoltage Protection 4 Volts 3 96 Volts max 6 Volts 6 Volts 14 4 Volts 15 Volts 18 Volts via magnetic feedback DOATEL DC DC CONVERTERS www cd4power com MDC_UQQ_A02 Page 4 of 14 GED TECHNOLOGIES POWER ELECTRONICS DIVISION UQQ Series Wide Input Range Single Output DC DC Converters ENVIRONMENTAL Calculated MTBF 4 TBC TBC TBC TBC TBC UQQ 3 3 25 012 UQ0 3 3 25 048 UQQ 5 17 Q12 UQQ 5 20 048 UQQ 12 8 Q12 UQQ 12 8 048 UQQ 15 7 Q12 DYNAMIC CHARACTERISTICS Dynamic Load Response 50usec to 1 100usec to 1 5Opsec to 1 50usec to 1 50usec to 1 50usec to 1 50usec to 1 of final value of final value of final value of final value of final value of final value
25. nt 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 dissipa tion with increasing density altitude 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 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 Short circuit shutdown begins when the output voltage degrades approximately 2 from the selected setting 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 require ments These requirements attempt continued operation despite significant input overvolt age 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 25 048 Ho
26. o cdtechno com Osaka Tel 6 6354 2025 email sales_osaka cdtechno com Website www cd4power jp Shanghai Tel 86 215 027 3678 email shanghai cdtechno com Guangzhou Tel 86 208 221 8066 email guangzhou cdtechno com DOATEL DC DC CONVERTERS www cd4power com MDC_UQQ_A02 Page 14 of 14
27. re in inches mm DOATEL DC DC CONVERTERS www cd4power com MDC UQQ A02 Page 3 of 14 GED TECHNOLOGIES UQQ Series POWER ELECTRONICS DIVISION aaa o Wide Input Range Single Output DC DC Converters Performance and Functional Specifications 1 UQQ 3 3 25 012 UQQ 3 3 25 048 UQQ 5 17 012 UQ0 5 20 048 UQQ 12 8 Q12 UQQ 12 8 048 UQQ 15 7 Q12 Input Voltage Range See ordering guide Start up Threshold 9 0 Volts 17 50 Volts 9 0 Volts 17 5 Volts 9 0 Volts 17 5 Volts 9 0 Volts Undervoltage Shutdown 8 0 Volts 16 75 Volts 8 0 Volts 16 75 Volts 8 0 Volts 16 0 Volts 8 0 Volts Overvoltage Shutdown 40 0 Volts NA 37 5 Volts None 37 Volts None 38 5 Volts Reflected back ripple current 25mAp p 15mAp p 75mAp p 25mAp p 75mAp p 15mAp p 50mAp p Input Current Full load conditions See ordering guide Inrush transient 0 1A sec 0 1A sec 0 1A sec 0 1A sec 0 1A sec 0 1A sec 0 1A sec Output short circuit 250mA 100mA 100mA 250mA 250mA 100mA 250mA No load 150mA 80mA 150mA 150mA 180mA 90mA 250mA Low line Vin min 10 3 Amps 5 04 Amps 10 49 Amps 6 11 Amps 11 99 Amps 5 96A 10 20 Amps Gu ar eid TT 8mA 2mA 8mA 8mA 5mA 2mA 5mA Internal Input Filter Type LC Pi type L C L C L C Pl type L C Reverse Polarity Protection Yes 15 NA Yes 15 Yes 15 Yes 15 NA Yes 15 Remote On Off Control 5 Positive logic
28. short circuit condition See Short Circuit Condition Short Circuit Condition 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 volt ages to begin ramping to their appropriate values If the short circuit condi tion 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 inter nal 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 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 lo
29. the Ordering Guide Do not order pin 9 without the baseplate Note that pin 9 converters may be on limited forecast requiring minimum order quanti ties and scheduled deliveries Please see page 9 for heatsink information DOATEL DC DC CONVERTERS www cd4power com MDC UQQ A02 Page 2 of 14 GED TECHNOLOGIES UQQ Series POWER ELECTRONICS DIVISION aaa Pie see ee Wide Input Range Single Output DC DC Converters MECHANICAL SPECIFICATIONS 1 860 47 24 INPUT OUTPUT CONNECTIONS Pin Function P32 Input Remote On Off Input Output Sense Output Trim Sense Output Baseplate optional 1 030 145 26 16 36 83 e o o oc1 2 ce nro M3 THREAD X 0 15 DEEP BASEPLATE The Remote On Off can be provided with TYPICAL 4 PLACES either positive P suffix or negative N Optional baseplate suffix polarity 0 50 12 70 With Baseplate 0 43 10 92 Without Baseplate u PINS 1 3 5 7 0 040 0 001 1 016 0 025 PINS 4 amp 8 0 060 0 001 1 52 0 025 2 22 56 39 HEN AA L 2 00 50 80 0 15 3 81 0 600 15 24 Optional pin 9 4 EQ SP connects to baseplate 0 150 3 81 and is electrically isolated from converter BOTTOM VIEW All dimensions a
30. wever 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 a body diode will become forward biased and will accept considerable current 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 DOATEL DC DC CONVERTERS www cd4power com MDC_UQQ_A02 Page 5 of 14 GED TECHNOLOGIES UQQ Series POWER ELECTRONICS DIVISION Absolute Maximum Ratings Input Voltage 12V models 48V models Continuous 0 to 36V 0 to 75V Transient 100msec 50V 100V On Off Control OV min to 13 5V max Input Reverse Polarity Protection See Fuse section Output Overvoltage Vout 20 max Output Current Current limited Devices can withstand sustained short circuit without damage Storage Temperature 55 to 125 C Lead Temperature soldering 10 sec max 280 C Absolute maximums are stress ratings Exposure of devices to any of these conditions may adversely affect long term reliability Proper operation under conditions other than those listed in the Performance Functional Specifications Table is not implied nor recommended
31. y 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 should not be allowed to exceed 0 5V Consider using heavier wire if this drop is excessive Wide Input Range Single Output DC DC Converters 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 Current Limiting When power demands from the output falls within the current limit incep tion 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 propor tionately 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 full power 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
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MURATA POWER SOLUTIONS UQQ Series Wide Input Range Single Output DC/DC Converters