TDK Maxeta iFA Series User's Manual
Contents
1. Output Voltage V 25 27 20 3 33 35 37 4 6 8 10 12 14 16 18 20 22 24 26 28 30 Input Voltage V Output Current A lo_min 2 1A s lo_mid 10 6A lo_max 21 1A Vin 19V s Vin 24V a Vin 36V x Vin 32V Output Voltage vs Input Voltage Line Regulation at Ta 25 C Typical Current Limit vs Input Voltage at Ta 25 C 2005 TDK Innoveta Inc ES 877 498 0099 iFA Advance Datasheet 6 6 2005 TDK Advance Data Sheet Maxeta iFA Series Thermal Performance iFA24021A280V 000 through 026 28V 21 5A 602W Output Output Current A Ambient Temperature C Ambient Temperature C NC 0 3 mis 60 LFM a 0 5 m s 100LFM E 1 0 m s 200 LFM 1 5 m s 300 LFM 2 0 m s 400 LFM 3 0 m s 600 LFM Max IMS Temp 2 0 m s 400 LFM 3 0 m s 600 LFM Max MS Temp Maximum output current vs ambient temperature at Maximum output current vs ambient temperature at nominal input voltage for airflow rates natural nominal input voltage for airflow rates natural convection 0 3 m s 60Ifm to 3 0m s 600Ifm with convection 0 3m s 60lfm to 3 0m s 600Ifm with airflow from Vout pins to Vout pins airflow from Vout pins to Vout pins NC 0 3 m s 60 LFM 0 5 m s 100 LFM E 1 0 m s 200 LFM 12. 101112131415 16 17 18 19 2021 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 Output Current A Output Current A Vin 19V Vin 24V Vin 36V Vin 32V Vin 19V Vin 24V Vin 36V Vin 32V Typical Efficiency vs Input Voltage and Load at Ta 25 C Typical Power Dissipation vs Input Voltage and Load at Ta 25 C 17 Feb 05 17 24 57 27 97 1 18 ms 5 8 V 27 965 27 96 27 955 27 95 27 945 TRER PORE SP SEO OPC SPR POGGIO 27 94 Output Voltage V 250 kS s SLOW TRIGGER 23 4 5 6 7 B 9 1011 1213 14 15 16 17 18 19 20 21 be NORMAL Output Current A Vin 19V Vin 24V Vin 36V lt Vin 32V Typical Output Voltage vs Load Current at Ta 25 Start up from ON OFF switch at nominal Vin and full load Ch 1 Vo Ch 2 ON OFF Ch 3 Vin Ch 4 lo 25 Feb 05 18 20 08 ietroy f i 2 ms i f i h f f l 250 kS s 1 MS s SLOW TRIGGER MA STOPPED Start up from input voltage application at nominal Vin and full load Typical Output Voltage Fall Characteristics at Vin 24V lo 21 5A Ch 1 Vo Ch 2 ON OFF C
3. Parallel Control Vin 9 Vout 15 TRIM Vin 10 Vout 16 SENSE Vout 11 Not present 17 SENSE Vout 12 AUX OUT 18 Pin base material is copper The maximum module weight is 250g 8 8 oz Heatsink Offering TDK Innoveta Orientation Overall Part Number Module Height HS00016 K Transverse HS00017 i Transverse HS00020 Longitudinal HS00021 y Longitudinal OU o HS00016 HS00020 iLi ill HS00017 HS00021 Transverse Heatsinks Longitudinal Heatsinks O20 lou HB Gi lalarediicit im laren ES 877 498 0099 iFA Advance Datasheet 6 6 2005 TDK Advance Data Sheet Maxeta iFA Series Absolute Maximum Ratings Stress in excess of Absolute Maximum Ratings may cause permanent damage to the device Characteristic Continuous Input Voltage Min 0 5 Wiebe 40 Unit Vdc Notes amp Conditions Transient Input Voltage 50 Vdc 100mS max Isolation Voltage Input to Output Input to Base plate Output to Base plate Basic Insulation Basic Insulation Operational Insulation Storage Temperature Operating Temperature Range Tc Input Characteristics Measured at the locat
4. Suite 100 Richardson Texas 75082 Phone 877 498 0099 Toll Free 469 916 4747 Fax 877 498 0143 Toll Free 214 239 3101 support tdkinnoveta com http www tdkinnoveta com 2005 TDK Innoveta Inc 2S 877 498 0099 iFA Advance Datasheet 6 6 2005 TDK Advance Data Sheet Maxeta iFA Series Mechanical Specification Unless otherwise specified tolerances are x x 0 5 mm x xx 0 02 in x xx 0 25 mm x xxx 0 010 in 3 81 0 150 5 places m BBE 668Om Tp gE 0 3501 12 70 A 195003 b286 29 21 0 9001 1150 O Bge io panna f aes kA Ch 8 89 o B 6 35 taesoat a a ae 106 68 4 200 114 3 4 50 3 6840 50 0 145 40 020 C 5 threaded Dee eee f one 0401D LULL of 1 0 50 a 35 56 50 80 22 86 e921 1 400 2 000 0 900 1 150 70 12 14 16 13 15 17 A 3 81 0 150 TYP N 10 3001 Recommended hole pattern top view 2005 TDK Innoveta Inc ES 877 498 0099 iFA Advance Datasheet 6 6 2005 TDK Advance Data Sheet Maxeta iFA Series Pin Assignment FUNCTION FUNCTION PIN FUNCTION ON OFF 7 Vout 13 PWR GOOD ON OFF 8 Vout 14
5. performance more power can be delivered at a given environmental condition Standard heatsink kits are available from TDK Innoveta for vertical module mounting in two different orientations longitudinal perpendicular to the direction of the pins and transverse parallel to the direction of the pins as shown in the Heatsink Offering section The heatsink kit contains four M3 x 0 5 steel mounting screws and a precut thermal interface pad for improved thermal resistance between the power module and the heatsink The screws should be installed using a torque limiting driver set between 0 35 0 55 Nm 3 5 in Ibs During heatsink assembly the base plate to heatsink interface must be carefully managed A thermal pad may be required to reduce mechanical assembly related stresses and improve the thermal connection Please contact TDK Innoveta Engineering for recommendation on this subject The system designer must use an accurate estimate or actual measure of the internal airflow rate and temperature when doing the heatsink thermal analysis For each application a review of the heatsink fin orientation should be completed to verify proper fin alignment with airflow direction to maximize the heatsink effectiveness For TDK Innoveta standard heatsinks contact TDK Innoveta Inc for latest performance data 2005 TDK Innoveta Inc 28 877 498 0099 iFA Advance Datasheet 6 6 2005 TDK Advance Data Sheet Maxeta iFA S
6. 5 m s 300 LFM Thermal Measurement Location Best Orientation Airflow Worst Orientation Airflow Thermal measurement location top view The thermal curves provided are based upon measurements made in TDK Innoveta s experimental test setup that is described in the Thermal Management section Due to the large number of variables in system design TDK Innoveta recommends that the user verify the module s thermal performance in the end application The critical component should be thermo coupled and monitored and should not exceed the temperature limit specified in the derating curve above It is critical that the thermocouple be mounted in a manner that gives direct thermal contact otherwise significant measurement errors may result 2005 TDK Innoveta Inc ES 877 498 0099 iFA Advance Datasheet 6 6 2005 2005 TDK Innoveta Inc iFA Advance Datasheet 6 6 2005 TDK Advance Data Sheet Maxeta iFA Series Thermal Management An important part of the overall system design process is thermal management thermal design must be considered at all levels to ensure good reliability and lifetime of the final system Superior thermal design and the ability to operate in severe application environments are key elements of a robust reliable power module A finite amount of heat must be dissipated from the power module to the surrounding environment This heat i
7. TDK Advance Data Sheet Maxeta iFA Series Standard Features Industry Standard Full Brick Power density gt 108W cubic inch High efficiency up to 92 Nominal input efficiency 89 at 100 load Nominal input efficiency 90 at 80 load Up to 602W of output power in high ambient Meets basic insulation requirements Voltage foldback constant current limit Start up into pre biased output bus User selectable on off either positive or negative logic Wide output voltage adjustment range Auto recovery protections o Input under and over voltage o Short circuit o Thermal limit Latched output over voltage protection High reliability open frame SMT construction Base plate for improved thermal management 2005 TDK Innoveta Inc iFA Advance Datasheet 6 6 2005 Maxeta iFA Series DC DC Power Modules 24V Input 28V Output 602W Full Brick The Maxeta iFA series power modules are ideally suited for wireless applications to power RF power amplifiers With a typical 89 full load efficiency 90 at 80 load a power density of 108W per cubic inch and a total power and current output capability of 602W and 21 5A respectively the Maxeta Series offers the highest efficiency power density and usable output power for 24V input applications in a standard full brick package currently available A wide output voltage trim range 40 to 10 remote sensing and isolated remote on off control are standard features enhanci
8. Vin min requirement Remote Output Voltage Sense Range Vdc Dynamic Response Settling Time to 10 Peak Deviation Peak Voltage Deviation di dt 0 1A uS Vin Vin nom Tc 25 C load step from 50 to 75 of lo max With at least a 10uF ceramic capacitor and two 220uF low esr aluminum or tantalum capacitors across the output terminals Output Voltage Overshoot during Startup lo lo max Tc 25 C Switching Frequency Fixed Output Over Voltage Protection 35 5 External Load Capacitance 7 000 Minimum ESR gt 1 5mQ Isolation Capacitance Isolation Resistance Load Share Accuracy Optional feature Power Good Pin Max Applied Voltage Optional feature Auxiliary Output Voltage Optional feature Engineering Estimate Contact TDK Innoveta for applications that require additional capacitance or capacitors with very low esr 2005 TDK Innoveta Inc ES 877 498 0099 iFA Advance Datasheet 6 6 2005 TDK Advance Data Sheet Maxeta iFA Series Electrical Characteristics iFA24021A280V 000 through 026 28V 21 5A 602W Output 90 80 70 60 50 40 30 4 20 10 0 peapeadenbe ae Efficiency n NI J Power Dissipation W 75 45 67 8 9
9. aboratory UL 1950 3 edition US amp Canada and other global certifications are typically obtained for each product platform The iFA products have the following certifications UL 60950 US amp Canada VDE 0805 CB Scheme IEC 950 CE Mark EN60950 For safety agency approval of the system in which the DC DC power module is installed the power module must be installed in compliance with the creepage and clearance requirements of the safety agency The isolation is basic insulation For applications requiring basic insulation care must be taken to maintain minimum creepage and clearance distances when routing traces near the power module As part of the production process the power modules are hi pot tested from primary and secondary at a test voltage of 1500Vdc When the supply to the DC DC converter is less than 60Vdc the power module meets all of the requirements for SELV If the input voltage is a hazardous voltage that exceeds 60Vdc the output can be considered SELV only if the following conditions are met The input source is isolated from the ac mains by reinforced insulation The input terminal pins are not accessible One pole of the input and one pole of the output are grounded or both are kept floating Single fault testing is performed on the end system to ensure that under a single fault hazardous voltages do not appear at the module output TS 877 498 0099 TDK Advance Data Shee
10. afety Considerations section of the data sheet 2005 TDK Innoveta Inc TS 877 498 0099 iFA Advance Datasheet 6 6 2005 TDK Advance Data Sheet Maxeta iFA Series Electrical Data iFA24021A280V 000 through 026 28V 21 5A 602W Output Max Unit Notes amp Conditions Characteristic Output Voltage Initial Set point Min Typ 28 28 42 Vdc Vin Vin nom lo lo max Tc 25 C Output Voltage Tolerance 28 70 Vdc Over all rated input voltage load and temperature conditions to end of life Efficiency Vin Vin nom lo lo max Tc 25 C Line Regulation mV Vin Vin min to Vin max lo and Tc fixed Load Regulation mV lo lo min to lo max Vin and Tc fixed Temperature Regulation mV Tc Tc min to Tc max Vin and lo fixed Output Current A At loads less than lo min the module will continue to regulate the output voltage but the output ripple may increase Output Current Limiting Threshold Vo 0 9 Vo nom Tc lt Tc max Tc 25 C Short Circuit Current Vo 0 25V Tc 25 C Output Ripple and Noise Voltage mVpp mVrms Vin 48V lo gt lo min Tc 25 C with a 0 1uF a 10uF ceramic two 220uF low esr aluminum capacitors located 2 inch away See input amp output ripple measurement figure BW 20MHz Output Voltage Adjustment Range Vo nom Po lt Po max refer to Output Voltage Adjustment figure for
11. ame range by applying external voltage at the trim pin via a buffer In this case Vo_d can be approximately determined by the following formula Vo_d Trim Terminal Voltage x Vo nom Contact Innoveta for more details on the voltage trim using an external source The maximum power available from the power module is fixed As the output voltage is trimmed up the maximum output current must be decreased to maintain the maximum rated power of the module As the output voltage is trimmed the output over voltage set point is not adjusted Trimming the output voltage too high may cause the output over voltage protection circuit to be triggered Remote Sense The power modules feature remote sense to compensate for the effect of output distribution drops The maximum voltage allowed between the output power terminals and output sense terminals is 0 5V If the remote sense feature is not being used the sense terminal should be connected to the Vo terminal and the sense pin should be connected to the Vo pin The output voltage at the Vo and Vo pins can be increased by either the remote sense or the output voltage adjustment feature The maximum voltage increase allowed is the larger of the remote sense range or the output voltage adjustment range it is not the sum of both As the output voltage increases due to the use of the remote sense the maximum output current must be decreased for the power module to remain
12. atic load share scheme By connecting the PC or Ishare pin of each power module with single wire the output load current can be equally drawn from each module The voltage at PC pin will range from 0 to 2V referenced to the output side sense All modules in parallel should be referenced to the same ground with good ground plane By setting the output voltage accuracy of each power module in a parallel operation to within 1 the load share circuit within the module will force the load current to be shared equally among the multiple modules within 10 accuracy from 50 to 100 of the rated load The maximum output power rating of each module shall not be exceeded 2005 TDK Innoveta Inc 28 877 498 0099 iFA Advance Datasheet 6 6 2005 TDK Advance Data Sheet Maxeta iFA Series Auxiliary Bias Power Optional The iFA series power modules provide an auxiliary output which is referenced to the output sense pin It provides an output voltage between 7 5 and 13 5Vdc that can supply a maximum current of 20mA The auxiliary bias circuitry does not have short circuit protection and may be damaged if over loaded An internal diode in series with the AUX output pin is provided to protect against reverse voltage up to 75V External Synchronization Optional An optional feature is available for the iFA series allowing the power module s to be synchronized with an external clock synchronization input from an inde
13. below the maximum rated power of the module Power Good Optional Normal or abnormal operation of the power module can be monitored using the power good signal The power good pin provides an open collector signal referenced to the output sense pin that is pulled low during normal operation of the power module The power good circuitry will pull the power good pin below 1V while sinking a maximum sink current of 5mA The maximum allowed voltage to the pin is 35V In order for the power good to pull low the following conditions must all be met None of the power module s protection features have been tripped the protection features include over voltage over current and over temperature protection The internal bias voltage is present The internal PWM drive signal is present The output voltage is approximately between 90 and 115 of Vo nom When these conditions are not met the maximum voltage that will appear at the output of the power good pin can be up to 50V The typical impedance from the power good pin to ground is greater than 500KQ Power Good signal may give invalid signal during the following conditions Operation of over current protection Light load condition at parallel operation Dynamic load operation Parallel Operation Optional The iFA series power modules are capable of sharing the load current when multiple units are connected in parallel The load sharing technique used is the democr
14. development process incorporates advanced quality planning tools such as FMEA and Cpk analysis to ensure designs are robust and reliable All products are assembled at ISO certified assembly plants 2005 TDK Innoveta Inc ES 877 498 0099 iFA Advance Datasheet 6 6 2005 2005 TDK Innoveta Inc iFA Advance Datasheet 6 6 2005 TDK Advance Data Sheet Maxeta iFA Series Input Output Ripple and Noise Measurements Ground Plane The input reflected ripple is measured with a current probe and oscilloscope The ripple current is the current through the 15uH inductor Lin with esr lt 10 mQ feeding a capacitor C1 esr lt 350 mQ 100kHZz across the module input voltage pins The capacitor C1 across the input shall be at least two 2 470uF 50V capacitors in parallel A 470uF 50V capacitor for CO is also recommended The output voltage ripple measurement is made approximately 5 cm 2 in from the power module using an oscilloscope and BNC socket The capacitor Cext consisting of a 0 1uF and a 10uF ceramic capacitors and at least two 2 220uF 50V aluminum electrolytic or tantalum capacitor esr lt 200 mQ in parallel located about 5 cm 2 in from the power module At lo lt lo min the module output is not required to be within the output voltage ripple and noise specification Safety Considerations All TDK Innoveta products are certified to regulatory standards by an independent Certified Administrative Agency l
15. e maximum value 10 up in a linear fashion a fixed resistor Rext should be connected between the trim pin and the sense pin while a 50KQ variable resistor Rv shall be connected between the Vout pin and the sense pin as shown below When Rext 5 11KQ the voltage trim rate is changed to approximately 0 459V KQ starting from 16 8V The resistor Rv should be chosen according to the following equation Rv 2 17833 x Vo_d 12 862 KQ Rext2 where Vo_d is the desired output voltage Figure Trim Down Connection To trim the output voltage down a fixed or variable resistor Rext2 shall be connected between the trim pin and the sense pin while the Vout pin and the sense pin are shorted by a jumper wire Vout pin and the sense pin should also be shorted by a jumper wire as shown below The resistor Rext2 can be chosen according to the following equation Rext Vo down 0 331 Figure Linear Trim Connection 4 787591 0 171506Vo_down Rext2 Trim dow n Resistance vs Vout Linear Trim Resistance vs Vout Trim Resistance KQ Trim Resistance 19 22 25 Output Voltage V 20 22 24 26 28 Output Voltage V 2005 TDK Innoveta Inc ES 877 498 0099 iFA Advance Datasheet 6 6 2005 TDK Advance Data Sheet Maxeta iFA Series The output voltage can also be adjusted within the s
16. ect to change 2005 TDK Innoveta Inc ES 877 498 0099 iFA Advance Datasheet 6 6 2005
17. eries Operating Information Output Over Current Protection The power modules are equipped with current limit over current slow hiccup and over current trip fast hiccup mode protection These three protection mechanisms safeguard the module during output overload and short circuit conditions During overload conditions the power modules protect themselves by first entering a current limit operation mode by lowering the module output voltage The relatively long off duration slow hiccup mode current protection circuit is triggered once the filtered peak switch current reaches the preset value The modules will operate normally once the output current returns to the specified operating range The fast over current trip protection is used to protect against short circuit or switch shoot through conditions It is a non latch fast acting protection circuit The triggering threshold is normally set quite high Over Current Adjustment The over current limit set point cannot be adjusted externally in this design Input Over voltage Protection The power modules have an internal protection circuit to help guard against application of over voltage at the input of the power module The modules shut down to protect themselves when the input line voltage exceeds 36Vdc When the input over voltage condition is removed the unit will auto restart and operate normally Input Under voltage Lockout The power modules also feature an input
18. h 3 Vin Ch 4 lo Ch 1 Vo Ch 2 ON OFF Ch 3 Vin Ch 4 lo 2005 TDK Innoveta Inc ES 877 498 0099 iFA Advance Datasheet 6 6 2005 TDK Advance Data Sheet Maxeta iFA Series Electrical Characteristics iFA24021A280V 000 through 026 28V 21 5A 602W Output 1 M r 05 10 48 30 etroy 1 ms f 8 50 v pkpk 1 rise maximumig minimume s 2 2 trig only Pec 12 Sa iaa meani 21 003 A 5 ps 1 5 mv aces 500 MS s 1 DC 12m 50 mV DC it AUTO Output Ripple at Nominal Input Voltage and Full Load Ta 25 C Dynamic Load Response Load step from 50 to 75 of full load Ch 1 Vo Ch 4 lo with 0 1A uS Vin nominal Ch 1 Vo Ch 4 lo 14 Mar 05 13 50 19 LeCroy 40 eree RRS j pkpk 1 pms 1 maximumc4 minimum 4 1 1 00 V 35 30 25 Input Current A 2 5 MS s NORMAL 24 26 28 30 32 34 Input Voltage V lo_min 2 1A bo_mid 10 6A s lo_max 21 1A Dynamic Load Transient Load step from 33 to 66 of full load Input Start up Current vs Line and Load Current at Ta 25 C with 200Hz High Slew Rate Ch 1 Vo Ch 4 lo N to D a i N to Output Voltage V N to a a
19. he module ON status must be greater than 1mA Other methods such as using an external power source and a transistor are also possible Please consult the field application engineering department of TDK Innoveta Inc for details ON OFF ON OFF ON OFF Control from Output Side Output Voltage Adjustment The output voltage of the power module is adjustable by the user using an external resistor or by applying external voltage However when the output voltage is increased the input voltage range is limited as shown in the following figure Vin Limit for Trim up Vo trim Vo nom 18 19 20 21 22 23 24 25 Vin V To trim the output voltage up a fixed or variable resistor Rext1 shall be connected between the Vout pin and the sense pin while the Vout pin and the sense pin should be shorted by a jumper wire as shown below The trim pin should be left open The output voltage trim up rate is approximately 1V KQ To trim the voltage up to 30 8V from 28V a 2 87KQ external resistor needs be used Figure Trim up Connection 2005 TDK Innoveta Inc ES 877 498 0099 iFA Advance Datasheet 6 6 2005 TDK Advance Data Sheet Maxeta iFA Series If the output voltage adjustment feature is not used the Vout pin should be shorted to the sense pin and the Vout pin should be shorted to the sense pin by jumper wires In order to trim the output voltage from the minimum value 40 down to th
20. ion specified in the thermal measurement figure maximum temperature varies with output current and module orientation see curve in the thermal performance section of the data sheet Unless otherwise specified specifications apply over all Rated Input Voltage Resistive Load and Temperature conditions Characteristic Operating Input Voltage Min Typ 24 Max 36 Unit Notes amp Conditions When 18V lt Vin lt 19V the modules will continue to operate but the output voltage regulation may be out of spec at full load condition Vdc Input Current 37 Vin 0 to Vin max Input Low End Turn on Voltage Input Low End Turn off Voltage Hysteresis Input Over voltage Turn off Voltage Input High End Turn on Voltage Startup Delay Time from application of input voltage Vo 0 to 0 1 Vo nom on off on lo l0 max Tc 25 C Startup Delay Time from on off Vin Vin nom lo l0 max Tc 25 C Output Voltage Rise Time lo lo max Vo 0 1 to 0 9 Vo nom Tc 25 C Inrush Transient Input Reflected Ripple Vin Vin nom lo lo max 0 to 2OMHz See input output ripple measurement figure BW 5 MHz Input Ripple Rejection 120Hz Engineering Estimate Telecom 24V battery plant voltage is typically set at 27 24V Caution The power modules are not internally fused An external input line fuse with a maximum value of 40A is required See the S
21. ng versatility The Maxeta iFA series power modules are also suited for other telecommunication applications Constant switching frequency UL 60950 US and Canada VDE 0805 CB scheme IEC950 CE Mark EN60950 EMI CISPR 22 Class A B with external filters US 6 618 274 Other patents pending ISO Certified manufacturing facilities Optional Features Short Thru hole pin 2 794mm 0 110 Thru hole PEM studs for ease of mounting Single wire current sharing optional Power good Indication optional Auxiliary logic 10V output optional 2 877 498 0099 TDK Advance Data Sheet Maxeta iFA Series Ordering information Product Package Platform Input Output Output Main Of Safety Feature Set Identifier Size Voltage Current Units Output Outputs Class Power Voltage TDK Innoveta Full Brick Standard Maxeta 021 21 5 280 28V gt 00 See option table Feature OVP Out Pin Length PEM Stud Special Code Set Replaces Style Power Threaded No 0 145 Threaded No 0 110 Threaded No 0 145 Thru hole No 20 No 26 No 0 200 Thru hole Yes Voltage foldback constant current limit no load share no Power Good no Aux Output Product Offering Input Voltage Output Voltage Output Current Maximum Output Efficiency Power iFA24021A280V 020 19V to 36V iFA24018A280V 020 19V to 36V TDK Innoveta Inc 3320 Matrix Drive
22. pendent time base Contact Innoveta for more details on the external clock synchronization feature EMC Considerations Innoveta DC DC converter modules are designed for use ina wide variety of systems and applications With the help of external filters and careful layout it is possible to meet CISPR 22 Class B For assistance with designing for EMC compliance please contact Innoveta technical support Input Impedance The source impedance of the input power feeding the DC DC converter module will interact with the DC DC converter which may cause system instability To minimize the interaction two or more 470uF 50V input electrolytic capacitor s should be present if the source inductance is greater than 4uH Reliability The power modules are designed using Innoveta s stringent design guidelines for component de rating product qualification and design reviews Early failures are screened out by both burn in and an automated final test The MTBF is calculated to be greater than 1 5M hours at nominal input 100 output power 0 5 heatsink 200LFM airflow and Ta 40 C using the Telcordia TR 332 issue 6 calculation method Improper handling or cleaning processes can adversely affect the appearance testability and reliability of the power modules Contact Innoveta technical support for guidance regarding proper handling cleaning and soldering of Innoveta s power modules Quality TDK Innoveta s product
23. s transferred by the three modes of heat transfer convection conduction and radiation While all three modes of heat transfer are present in every application convection is the dominant mode of heat transfer in most applications However to ensure adequate cooling and proper operation all three modes should be considered in a final system configuration The open frame design of the power module provides an air path to individual components This air path improves convection cooling to the surrounding environment which reduces areas of heat concentration and resulting hot spots Test Setup The thermal performance data of the power module is based upon measurements obtained from a wind tunnel test with the setup shown in the wind tunnel figure This thermal test setup replicates the typical thermal environments encountered in most modern electronic systems with distributed power architectures The electronic equipment in networking telecom wireless and advanced computer systems operates in similar environments and utilizes vertically mounted printed circuit boards PCBs or circuit cards in cabinet racks The power module is mounted on a 0 062 inch thick 6 layer 20z layer PCB and is vertically oriented within the wind tunnel Power is routed on the internal layers of the PCB The outer copper layers are thermally decoupled from the converter to better simulate the customer s application This also results in a more conserva
24. t Maxeta iFA Series To preserve maximum flexibility the power Warranty modules are not internally fused An external input line normal blow fuse with a maximum value of 40A is required by safety agencies TDK Innoveta s comprehensive line of power solutions includes efficient high density DC DC converters TDK Innoveta offers a three year limited warranty Complete warranty information is listed on our web site or is available upon request from TDK Innoveta A lower value fuse can be selected based upon the maximum dc input current and maximum inrush energy of the power module TDK Innoveta Inc 3320 Matrix Drive Suite 100 Richardson Texas 75082 Phone 877 498 0099 Toll Free 469 916 4747 Fax 877 498 0 1 43 Toll Free Information furnished by TDK Innoveta is believed to be accurate and reliable However TDK Innoveta assumes no responsibility 2 1 4 239 31 01 for its use nor for any infringement of patents or other rights of third parties which may result from its use No license is granted support tdkinnoveta com http www tdkinnoveta com by implication or otherwise under any patent or patent rights of TDK Innoveta TDK Innoveta components are not designed to be used in applications such as life support systems wherein failure or malfunction could result in injury or death All sales are subject to TDK Innoveta s Terms and Conditions of Sale which are available upon request Specifications are subj
25. tive derating The cross section of the airflow passage is rectangular with the space between the top of the module or heatsink where applicable and a parallel facing PCB is kept ata constant 0 5 in The power module s orientation with respect to the airflow direction can have a significant impact on the unit s thermal performance Thermal De rating For proper application of the power module in a given thermal environment output current de rating curves are provided as a design guideline in the Adjacent PCB Module Centerline AAAS 7613 0 AIRFLOW l Zor mI r Air Velocity and Ambient Temperature Measurement Location Air Passage Centerline Wind Tunnel Test Setup Figure Dimensions are in millimeters and inches Thermal Performance section for the power module of interest The module temperature should be measured in the final system configuration to ensure proper thermal management of the power module For thermal performance verification the module temperature should be measured at the location indicated in the thermal measurement location figure on the Thermal TS 877 498 0099 TDK Advance Data Sheet Maxeta iFA Series Performance page for the power module of interest In all conditions the power module should be operated below the maximum operating temperature shown on the derating curve For improved design margins and enhanced system reliability the po
26. um operating temperature it will turn off to protect itself against thermal damage The module will auto restart as soon as it cools down below the recovery temperature Thermal Warning There is no thermal warning feature for this design Remote On Off The iFA series power modules have two remote on off pins which are isolated from the input side as well as the output side To control the power module from the input side the user must supply a switch between the Vin terminal and the ON OFF terminal of ON OFF pins A 15KQ external resistor with 0 25W or more power rating is recommended to connect between the Vin terminal and the ON OFF terminal The maximum allowable leakage current of the switch is 50uA The maximum current sinking capability of the ON OFF terminal is 5mA or less The current required to maintain the module ON status must be greater than 1mA 2005 TDK Innoveta Inc 28 877 498 0099 iFA Advance Datasheet 6 6 2005 ON OFF ON OFF Control from Input Side An alternative way to control ON OFF is from the output side by utilizing AUX output pin of the same module To do so the user must supply a switch between the module sense terminal and the ON OFF terminal of ON OFF pins A 2 5 KQ 0 125W resistor is recommended to connect between the module AUX pin and the ON OFF terminal The maximum current sinking capability of the ON OFF terminal is 5mA or less The current required to maintain t
27. under voltage lockout circuitry that ensures that the power module is off at low input voltage levels The power module will operate normally when the input voltage returns to the specified range Output Over Voltage Protection The power modules have a protection circuit independent of the main PWM control loop that reduces the risk of over voltage appearing at the output of the power module during a fault condition If there is a fault in the main regulation loop the over voltage protection circuitry will latch the power module off once it detects the over voltage condition as specified on the electrical data page To remove the module from the latched condition either turn the input power off and back on or reset the remote ON OFF pins providing that over voltage conditions have been removed The reset time of the ON OFF pins should be 500ms or longer Output Over Voltage Adjustment The output over voltage set point cannot be adjusted externally in this design Output Under Voltage Warning The iFA series power module has internal circuitry to protect against output under voltage conditions If an under voltage condition is present on the output the module will signal this condition using the Power Good pin There is a delay between the under voltage condition appearing at the module output and the module switching the Power Good pin to high impedance Thermal Protection When the power module exceeds the maxim
28. wer module may be operated at temperatures below the maximum rated operating temperature Heat transfer by convection can be enhanced by increasing the airflow rate that the power module experiences The maximum output current of the power module is a function of ambient temperature Tams and airflow rate as shown in the thermal performance figures in the Thermal Performance section The curves in the figures are shown for natural convection through 3 m s 600 ft min The data for the natural convection condition has been collected at 0 3 m s 60 ft min of airflow which is the typical airflow generated by other heat dissipating components in many of the systems that these types of modules are used in In the final system configurations the airflow rate for the natural convection condition can vary due to temperature gradients from other heat dissipating components Heatsink Usage For applications with demanding environmental requirements such as higher ambient temperatures or higher power dissipation the thermal performance of the power module can be improved by attaching a heatsink or cold plate The iFA platform is designed with a base plate with four M3 X 0 5 through threaded mounting fillings for attaching a heatsink or cold plate A non threaded version is also available The addition of a heatsink can reduce the airflow requirement ensure consistent operation and extended reliability of the system With improved thermal
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