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europe astec europe ltd. high street,wollaston, stourbridge, west midlands, dy8 4pg u.k. tel : 01384-440044 fax : 01384-440777 north america astec america, inc,. 6339 paseo del lago, carlsbad ca 92009, usa. tel : 760-757-1880 fax : 760-930-4700 for further information contact : asia astec power systems 6th floor, cdw building, 382-392 castle peak road, tsuen wan, n.t. hong kong tel : 852 24117429 fax : 852 24113610 apa701-ak60 rev. 02 may 97
ak60a ampss ? astec modular power supply system series highlights ? high efficiency - up to 88% ? 100w output power ? excellent transient response ? 85 c baseplate/case operating temperature ? low output ripple and noise ? high reliability - over 1 million hours mtbf ? wide input voltage range ? designed to meet telecom specification ? fixed switching frequency economy series dc-dc converter module technical reference manual 50-100w output power
ak60a economy series rev. 02 may 97 ampss ? reference manual 22 contents introduction ...................................................................................................... 2 special features .............................................................................................. 2 ordering information ........................................................................................ 3 safety ............................................................................................................... 3 electrical specifications .................................................... 4 absolute maximum ratings C all models ......................................................... 4 pin connections - all models ............................................................................ 5 electrical specifications for 24v input models (ak60a-024l-xxxfyy) ............. 6 insulation - all models ...................................................................................... 6 electrical specifications for 48v input models (ak60a-048l-xxxfyy) ............. 8 functional description .................................................... 10 remote sense (+sense, -sense) .............................................................. 10 enable control (enable) .............................................................................. 10 pri aux ......................................................................................................... 10 clk in ............................................................................................................ 11 output voltage adjustment (v adj) ............................................................... 12 signal common (s com) .............................................................................. 12 design considerations .................................................... 13 input bulk capacitors ..................................................................................... 13 remote loads ................................................................................................ 13 input undervoltage protection ........................................................................ 13 conducted emi .............................................................................................. 13 output ripple and noise ................................................................................ 13 input fusing ................................................................................................... 13 break regulation ............................................................................................ 14 overtemperature protection ........................................................................... 14 mtbf ............................................................................................................. 14 thermal data ................................................................................................. 14 application example ........................................................ 15 mechanical information ................................................... 16 dimensions .................................................................................................... 16 recommended pcb layout ........................................................................... 17 heatsink mounting information ...................................................................... 18
rev. 02 may 97 ampss ? reference manual introduction 23 ak60a economy series dc-dc converters pwm control and gating osc + in ?in enable v adj ?sense + sense ?out + out 22 24 26 28 1 4 31 32 7 internal temperature sensor 3 primary side secondary side over- voltage protection voltage sensing and control 300v modules only mosfet switcher 5 s com 6 pri aux 8 clk in pri aux introduction the ak60a is an isolated, single output dc to dc converter module, providing up to 100w output. the ak60a features primary side control, remote enable, remote sensing and a baseplate operating tempera- ture of up to 85 c. special features ? high efficiency - up to 88% ? 500 khz fixed frequency switching ? 85 c baseplate/case operating temperature (with no derating) ? low output ripple and noise ? excellent transient response ? high reliability - over 1 million hours mtbf ? wide input voltage range ? ttl compatible enable control ? adjustable output voltage ? overtemperature and short circuit protection 28 27 23 22 32 31 ampss tm power module 24 26 s com 5 rsv 2 + sense 1 7 enable 8 clk-in 3 v adj 4 - sense +- + - pri aux 6
ak60a economy series rev. 02 may 97 ampss ? reference manual 24 ordering information please contact astec for information on other output voltages, power ranges and configurations. safety ul: ul1950 csa: csa c22.2 no.950 vde: vde 0805 (48vin only) en60950 (48vin only) ce: ce mark (48vin only) please contact astec for information on specific module approvals. note: ensure all modules are used according to the installation instructions provided with each module. model number input volta g e output volta g e output current output power ak60a-048l-050f10 48v 5v 10a 50w ak60a-048l-050f15 48v 5v 15a 75w ak60a-048l-050f20 48v 5v 20a 100w ak60a-048l-120f04 48v 12v 4.2a 50w ak60a-048l-120f06 48v 12v 6.3a 75w ak60a-048l-120f08 48v 12v 8.3a 100w ak60a-048l-150f03 48v 15v 3.3a 50w ak60a-048l-150f05 48v 15v 5.0a 75w ak60a-048l-150f07 48v 15v 6.7a 100w ak60a-024l-050f10 24v 5v 10a 50w ak60a-024l-050f15 24v 5v 15a 75w ak60a-024l-050f20 24v 5v 20a 100w ak60a-024l-120f04 24v 12v 4.2a 50w ak60a-024l-120f06 24v 12v 6.3a 75w ak60a-024l-120f08 24v 12v 8.3a 100w ak60a-024l-150f03 24v 15v 3.3a 50w ak60a-024l-150f05 24v 15v 5.0a 75w ak60a-024l-150f07 24v 15v 6.7a 100w ak60a-024l-240f02 24v 24v 2.1a 50w ak60a-024l-240f03 24v 24v 3.1a 75w ak60a-024l-240f04 24v 24v 4.2a 100w all modules are designed to meet the following specifications: ets300-132-2 ets300-386-1 (1) en55022-a (1) en55022-b (1) en41003 iec6100-44 (1) iec6100-45 (1) iec950 vde0871-a (1) vde0878-a (1) btnr2511(5) (1) (1) require additional external circuitry for full compliance. please refer to application section of this manual or contact technical support office for further information.
rev. 02 may 97 ampss ? reference manual electrical specifications 25 electrical specifications absolute maximum ratings C all models exceeding the specified absolute maximum ratings may severely damage the module. these ratings are intended as guidelines for absolute worst case operating conditions and are not to be interpreted as recom- mended operating condition specifications electrical characteristics are guaranteed over the full baseplate/case temperature range (-20 to 85?c) and for the full range of input voltage (v i ) and for the full load range (i omin to i o rated). except where indicated , +sense and -sense are connected to the output terminals at the point of measurement, enable is con- nected tos com. all other pins are left floating. definitions v i , v o and i o are actual operating conditions, v inom , v onom and i orated are nominal ratings. secondary control pins +sense v o - 0.5 to v o + 0.5 vdc -sense -0.5 to 0.5 vdc v adj -0.5 to 7 vdc note : v o = module output volta g e note: relative to -output primary control pins enable -0.5 to 20 vdc pri aux -0.5 to 14vdc clk-in -10 to 10 vdc note: relative to - input/ s com general 48vinput 24v input continuous input voltage 72v 36v input surge voltage (1 sec) 75v (continuous) 38v isolation, input to output 1500vdc 1500vdc isolation, input to baseplate 1500vdc 1500vdc isolation, output to baseplate 500vdc 500vdc operating temperature (baseplate) / case -20 to 85?c storage temperature -40 to 105?c operating relative humidity (non-condensing) 10% to 95% storage relative humidity (non-condensing) 95% max altitude (operating) < 3000m altitude (storage) < 9000m lead temperature (soldering 5 seconds) 235?c
ak60a economy series rev. 02 may 97 ampss ? reference manual 26 pin connections - all models 28 27 23 22 32 31 ampss tm power module 24 26 s com 5 rsv 2 + sense 1 7 enable 8 clk-in 3 v adj 4 - sense +- + - pri aux 6 input pins pin no pin name type description recommended connections 3 1 +input input power input - positive a 220 m f electrolytic capacitor connected between the +input and -input pins is recommended 3 2 -input input power input - negative (return) see + input for recommendations output pins pin no pin name type description recommended connections 22-24 +output output power output - positive ensure good electrical connection and sufficient copper on pcb layouts 26-28 -output output power output - negative see +output for recommendations control signals control function conditions parameter min typ max units v adj - voltage adjust 5v output: connect 2.4k w from vadj to +sense v o 90 %v onom 12v output: connect 27k w from vad j to +sense v o 90 %v onom 15v output: connect 39k w from vad j to +sense v o 90 %v onom 24v output: connect 82k w from vad j to +sense v o 90 %v onom connect to -sense v o 110 %v onom enable - module enable module enabled v enable 0 0.8 v module disabled v enable 210 v v enable = 0.8v enable current source 300 m a pri aux external capacitor external capacitiance 0 2200 m f capacitor voltage ratin g 25 v external aux vcc 11.8 12.0 14 v iaux current drawn from external suppl y 100 200 ma clk-in available at rev2 or above module v clk in 4.4 5.0 5.5 v p-p clock frequency 500 khz duty cycle 49 50 51 % primary control pins pin no pin name type description recommended connections 5 s com reference negative reference for all primary side si g nals connect to negative side of primary control and monitorin g circuitr y 6 pri aux input primary auxiliary supply. allows external capacitance or external auxiliary supply to be connected to the module to allow start-up into high capacitance loads normally not used. leave unconnected. when required, connect capacitor to s- com or connect external 12v auxiliary supply 7 enable input enables or disables the output of the module must be connected to -s com pin or driven to <0.8v to enable the output of the module 8 clk-in input accept a 500khz input clock for synchronisation with host system or other modules connect to external clock signal. leave unconnected if not used. secondary control pins pin no pin name type description recommended connections 1 +sense input used for remote sense function to compensate for load bus resistance if remote sensing is not required connect to +output pins 22-24 of the module 2 rsv - reserved leave unconnected 3 v adj input used to adjust module output volta g e leave unconnected if not used 4 -sense input used for remote sense function to compensate for load bus resistance if remote sensing is not required connect to -output pins 26-28 of the module
rev. 02 may 97 ampss ? reference manual electrical specifications 27 electrical specifications for 24v input models (ak60a-024l-xxxfyy) transient characteristics parameter conditions min typ max units turn-on time v i = 0 to v inom 1 sec transient response step-load excursion 10 %v o (25% to 75% load change @ step-load response 500 m s 0.1a/ m s, recovery to 1% v o ) input characteristics parameter conditions min typ max units input voltage 18 24 36 v input surge voltage (1 second) 38 v input low line power on voltage module power on 15.6 17.8 v input low line power off voltage module shutdown 8 13 v input capacitance 9 m f input current low line, nom v o , max i o ak60a-024l-050f10 3.5 a ak60a-024l-050f15 5.4 a ak60a-024l-050f20 7.5 a ak60a-024l-120f04 3.5 a ak60a-024l-120f06 5.2 a ak60a-024l-120f08 7.2 a ak60a-024l-150f03 3.5 a ak60a-024l-150f05 5.2 a ak60a-024l-150f07 7.0 a ak60a-024l-240f02 3.5 a ak60a-024l-240f03 5.1 a ak60a-024l-240f04 6.9 a insulation parameter conditions min typ max units input-output insulation resistance 500vdc 10 m w input-baseplate insulation resistance 500vdc 10 m w output-baseplate insulation resistance 500vdc 10 m w insulation - all models
ak60a economy series rev. 02 may 97 ampss ? reference manual 28 electrical specifications for 24v input models (cont'd) output characteristics parameter conditions min typ max units nominal (factory set) output voltage ak60a-024l-050f10 5.0 v ak60a-024l-050f15 5.0 v ak60a-024l-050f20 5.0 v ak60a-024l-120f04 12.0 v ak60a-024l-120f06 12.0 v ak60a-024l-120f08 12.0 v ak60a-024l-150f03 15.0 v ak60a-024l-150f05 15.0 v ak60a-024l-150f07 15.0 v ak60a-024l-240f02 24.0 v ak60a-024l-240f03 24.0 v ak60a-024l-240f04 24.0 v output voltage set point accuracy t c = +25?c, v i = v inom , i o = i orated -1 1 %v onom remote sense compensation v i = v imin 0.5 v output voltage adjust 90 110 %v onom nominal (factory set) output overvolta g e protection trip point 120 140 %v onom line regulation v imin to v imax 0.2 %v onom load re g ulation 1 10% of i omax to i omax 0.5 %v onom noise and ripple 20mhz bandwidth 3 %v o output current ak60a-024l-050f10 1.00 10.00 a ak60a-024l-050f15 1.50 15.00 a ak60a-024l-050f20 2.00 20.00 a ak60a-024l-120f04 0.42 4.20 a ak60a-024l-120f06 0.63 6.30 a ak60a-024l-120f08 0.83 8.30 a ak60a-024l-150f03 0.33 3.30 a ak60a-024l-150f05 0.50 5.00 a ak60a-024l-150f07 0.67 6.70 a ak60a-024l-240f02 0.21 2.10 a ak60a-024l-240f03 0.31 3.10 a ak60a-024l-240f04 0.42 4.20 a output current limit v o dropped to 90% of v onom 105 125 %i orated temperature coefficient per ?c baseplate temperature 0.02 %v o /?c maximum load capacitance (pri resistive load start up aux left open) ak60a-024l-050f10 tbd m f ak60a-024l-050f15 tbd m f ak60a-024l-050f20 tbd m f ak60a-024l-120f04 tbd m f ak60a-024l-120f06 tbd m f ak60a-024l-120f08 tbd m f ak60a-024l-150f03 40 m f ak60a-024l-150f05 200 m f ak60a-024l-150f07 500 m f ak60a-024l-240f02 tbd m f ak60a-024l-240f03 tbd m f ak60a-024l-240f04 tbd m f overtemperature shutdown baseplate temperature 88 95 100 ?c efficiency v i =v inom , v o =v onom , i o =i orated ak60a-024l-050f10 81 82 % ak60a-024l-050f15 79 80 % ak60a-024l-050f20 78 80 % ak60a-024l-120f04 83 87 % ak60a-024l-120f06 84 86 % ak60a-024l-120f08 84 86 % . ak60a-024l-150f03 84 86 % ak60a-024l-150f05 84 86 % ak60a-024l-150f07 83 84 % ak60a-024l-240f02 84 86 % ak60a-024l-240f03 85 86 % ak60a-024l-240f04 84 86 % notes : 1. if pri aux option is not implemented then minimum load of 10% is required to establish stable converter operation
rev. 02 may 97 ampss ? reference manual electrical specifications 29 electrical specifications for 48v input models (ak60a-048l-xxxfyy) input characteristics parameter conditions min typ max units input voltage 36 48 72 v input surge voltage continuous 75 v input low line power on voltage module power on 22.0 32.5 v input low line power off voltage module shutdown 20.0 28.0 v input capacitance 2.5 m f input current low line, nom v o , max i o ak60a-048l-050f10 1.9 a ak60a-048l-050f15 2.8 a ak60a-048l-050f20 3.6 a ak60a-048l-120f04 1.8 a ak60a-048l-120f06 2.6 a ak60a-048l-120f08 3.4 a ak60a-048l-150f03 1.9 a ak60a-048l-150f05 2.7 a ak60a-048l-150f07 3.5 a transient characteristics parameter conditions min typ max units turn-on time v i = 0 to v inom 1 sec transient response step-load excursion 10 %v o (25% to 75% load change @ step-load response 500 m s 0.1a/ m s, recovery to 1% v o )
ak60a economy series rev. 02 may 97 ampss ? reference manual 30 electrical specifications for 48v input models (cont'd) output characteristics parameter conditions min typ max units nominal (factory set) output voltage ak60a-048l-050f10 5.0 v ak60a-048l-050f15 5.0 v ak60a-048l-050f20 5.0 v ak60a-048l-120f04 12.0 v ak60a-048l-120f06 12.0 v ak60a-048l-120f08 12.0 v ak60a-048l-150f03 15.0 v ak60a-048l-150f05 15.0 v ak60a-048l-150f07 15.0 v output voltage set point accuracy t c = +25?c, v i = v inom , i o = i orated -1 1 %v onom remote sense compensation v i = v imin 0.5 v output voltage adjust 90 110 %v onom nominal (factory set) output overvolta g e protection trip point 120 140 %v onom line regulation v imin to v imax 0.2 %v onom load re g ulation 1 10% of i omax to i omax 0.5 %v onom noise and ripple 20mhz bandwidth 3 %v o output current ak60a-048l-050f10 1.00 10.00 a ak60a-048l-050f15 1.50 15.00 a ak60a-048l-050f20 2.00 20.00 a ak60a-048l-120f04 0.42 4.20 a ak60a-048l-120f06 0.63 6.30 a ak60a-048l-120f08 0.83 8.30 a ak60a-048l-150f03 0.33 3.30 a ak60a-048l-150f05 0.50 5.00 a ak60a-048l-150f07 0.67 6.70 a output current limit v o dropped to 90% of v onom 105 125 %i orated maximum load capacitance (pri resistive load startup aux left open) ak60a-048l-050f10 5200 m f ak60a-048l-050f15 5200 m f ak60a-048l-050f20 16000 m f ak60a-048l-120f04 350 m f ak60a-048l-120f06 600 m f ak60a-048l-120f08 1800 m f ak60a-048l-150f03 180 m f ak60a-048l-150f05 400 m f ak60a-048l-150f07 440 m f temperature coefficient per ?c baseplate temperature 0.02 %v o /?c overtemperature shutdown baseplate temperature 88 95 100 ?c efficiency v o = v onom , v i = v inom , i o = i orated ak60a-048l-050f10 80 82 % ak60a-048l-050f15 80 82 % ak60a-048l-050f20 81 82 % ak60a-048l-120f04 84 87 % ak60a-048l-120f06 86 88 % ak60a-048l-120f08 86 88 % . ak60a-048l-150f03 80 83 % ak60a-048l-150f05 82 84 % ak60a-048l-150f07 83 85 % notes : 1. if pri aux option is not implemented then minimum load of 10% is required to establish stable converter operation
rev. 02 may 97 ampss ? reference manual functional description 31 load +sense ?ense 1 4 +o/p ?/p 3 2 5 6 8 7 0.5v max voltage at load module output voltage load current volts functional description this section explains how to implement the functions found on the ak60a series. remote sense (+sense, -sense) connect the +sense and -sense pins directly to the load to allow the module to compensate for the voltage drop across the conductors carrying the load current. if remote sensing is not required (for exam- ple if the load is close to the module) the sense pins should be connected directly to the modules output pins to ensure accurate regulation. note: if the sense leads fail open circuit, the module will revert to local sense at the output pins. incorrect connection of sense leads may damage the module enable control (enable) the enable pin is a ttl compatible input used to turn the output of the module on or off. the module output is enabled when the enable pin is con- nected to s com or driven to a logic low of <0.8v (but not negative). the output is disabled when the enable pin is open or driven to a logic high >2v. 1 4 +o/p ?/p 3 2 5 6 8 7 + sense - sense 1 4 +o/p ?/p 3 2 5 6 8 7 - sense + sense the ability of the ak60 to start highly capacitative loads can be extended by adding an external capacitor or adding an external auxiliary supply. pri aux 1 4 +o/p ?/p 3 2 5 6 8 7 + sense - sense c aux + - load c load
ak60a economy series rev. 02 may 97 ampss ? reference manual 32 model c aux none 1 0 0 m f 470 m f 1000 m f 2200 m f ak60a-024l-050f10 tbd tbd tbd tbd tbd ak60a-024l-050f15 tbd tbd tbd tbd tbd ak60a-024l-050f20 tbd tbd tbd tbd tbd ak60a-024l-120f04 tbd tbd tbd tbd tbd ak60a-024l-120f06 tbd tbd tbd tbd tbd ak60a-024l-120f08 tbd tbd tbd tbd tbd ak60a-024l-150f03 4 0 940 1200 12250 26000 ak60a-024l-150f05 200 1440 6300 13500 21800 ak60a-024l-150f07 500 2500 8000 20000 35000 ak60a-024l-240f02 tbd tbd tbd tbd tbd ak60a-024l-240f03 tbd tbd tbd tbd tbd ak60a-024l-240f04 tbd tbd tbd tbd tbd ak60a-048l-050f10 5200 28000 35000 >200000 >200000 ak60a-048l-050f15 5200 28000 35000 >200000 >200000 ak60a-048l-050f20 16000 45000 50000 >200000 >200000 ak60a-048l-120f04 350 1250 8800 15700 21500 ak60a-048l-120f06 600 2200 8800 15700 21500 ak60a-048l-120f08 1800 6400 22800 49200 99000 ak60a-048l-150f03 180 1100 5500 11000 28550 ak60a-048l-150f05 400 1330 7700 15700 35100 ak60a-048l-150f07 440 2200 15700 31800 49200 with an external auxiliary supply, the ak60a can be used with any value of load capacitance. clk in alternatively an external auxiliary supply can be used. the clk in function is available at rev2 or above module the clk in pin allows the ak60 to be synchronised to an external clock signal. the clock signal is a 50% duty cycle square wave. 1 4 +o/p ?/p 3 2 5 6 8 7 + sense - sense load c load 0 4.4-5.5v 1 4 +o/p ?/p 3 2 5 6 8 7 + sense - sense load c load external aux +12v common maximum load capacitance
rev. 02 may 97 ampss ? reference manual functional description 33 output voltage adjustment (v adj) the output voltage of the module may be accurately adjusted by up to 10% of the nominal factory set output. adjustment is carried out using a 1k ohm trimming potentiometer connected as indicated. ?sense + sense 1 4 +o/p ?/p 3 2 r pot = 1k r ext model no value of rext ak60a-xxxl-050fyy 0 ohm ak60a-xxxl-120fyy 1.1 kohm ak60a-xxxl-150fyy 1.5 kohm 0 20406080100 80 100 120 % r pot v out (% of v o ) voltage adjust characteristic ak60a-xxxl-240fyy 3.3 kohm signal common (s com) the s com pin is the common signal return for all primary side controls.
ak60a economy series rev. 02 may 97 ampss ? reference manual 34 design considerations input bulk capacitors electrolytic bulk reservoir capacitors placed close to the module input pins are recommended to ensure the module is fed with a low source impedance. for the ak60a economy series module typical values are 220 m f/50v for 24v modules, 220 m f/100v for 48v modules. remote loads if the sensed load is some distance from the module, the module's output voltage may rise sufficiently to trigger the ovp protection circuit during a step load change due to buss inductance. fitting a decoupling capacitor at the load can reduce this effect. it should be noted that a distributed power solution using ampss ? modules placed close to their loads will optimize transient response. voltage without causing the module to cycle on and off. typically 48v modules will turn on above 31v and turn off below 27v. 24v modules will turn on above 16.5v and turn off below 14v (see electrical specifications for exact figures). + + i/p ?i/p 220 f v i load 1 4 +o/p ?/p 3 2 - sense + sense input undervoltage protection an input undervoltage protection circuit protects the module under low input voltage conditions. hyster- esis is built into the ak60a enhanced series module to allow for high levels of ripple on the input supply + i/p ?i/p + protective earth baseplate conducted emi although ak60a economy series modules contain differential mode input emi filtering, power supply systems using these modules will require additional emi filtering to enable the system to meet relevant emi standards. ak60a modules have an effective input to ground (baseplate) capacitance of approximately 550pf. this should be accounted for when calculating the maximum emi y capacitance to meet ground leakage current specifications. output ripple and noise ak60a economy series modules are designed to generate very low ripple and noise. when mounted on logic boards, for example, sufficient decoupling is normally provided by the components used to decouple the logic ics, and no additional decoupling is required. input fusing ampss modules do not have an in-line fuse fitted internally. in order to comply with csa, vde and ul safety regulations it is recommended that a fuse of the following rating be fitted at the module's input. input fuse rating 24v 15a / 250v 48v 10a / 250v
rev. 02 may 97 ampss ? reference manual design considerations 35 break regulation ak60a economy series modules are designed to deliver full rated output current at up to 0.5v above v o nom at the minimum specified input voltage. 90% 100% 110% 18 20- 36 %v o nom v i (24v input modules) 90% 100% 110% 36 40 72 %v o nom v i (48v input modules) typical typical astec (part number apa501-60-002) with 11mm fins and 8mm pitch, will reduce module thermal imped- ance to 1.8 c/w with a forced air flow of (250 lfm) when mounted with a thermal pad (astec p/n apa502-60-001) between heatsink and module. overtemperature protection if the module's internal temperature exceeds 85 c, the module will protect itself by cycling on and off until the internal temperature drops below 85?c. by adding an external auxiliary supply to the pri aux pin, the module will latch off and automatically switch on again when the internal temperature has dropped by 5-10?c. thermal data natural convection thermal impedance of the ak60a package is approximately 4.4 c/w. a standard horizontal fin heatsink available from mtbf predicted mtbf for the ak60a economy series is greater than 1,000,000 hours at maximum rated output and 50 c baseplate temperature. forced convection for apa501-60-002 at 100w output 0 0.5 1 1.5 2 2.5 0 200 400 600 800 1000 vair (lfm) thermal resistance baseplate to ambient ( c/w)
ak60a economy series rev. 02 may 97 ampss ? reference manual 36 application example load +sense ?ense 1 4 +o/p ?/p 3 2 5 6 8 7 output voltage adjust enable (close to enable) 18 to 36v or 36 to 72v
rev. 02 may 97 ampss ? reference manual mechanical information 37 mechanical information dimensions the dimensions are given in mm (inches). note that the baseplate must be connected to protective earth before power is supplied to the module. base plate (connect to protective earth) 2 input pins ?.52 (0.060) 0.05 (0.002) 8 control pins ?.64, 2.54 grid 0.05 (?.025, 0.1 grid 0.002) 6 output pins ?.52 (0.060) 0.05 (0.002) 58.4 (2.30) 61.0 (2.40) 4 1 28 27 23 22 32 31 12.7 (0.50) 48.26 (1.900) 50.80 (2.000) 22.86 (0.900) 3.81 (0.150) typ 15.24 (0.600) 7.5 (0.30) typ 5.1 (0.20) typ 4.1 (0.16) typ notes: 1. all dimensions in mm and (inches) 2. baseplate must be connected to protective earth 3. general tolerance: .x 0.5 (0.02) .xx 0.25 (0.010) 4. surface flatness: concave 0.12mm max convex 0.38mm max ?.81 (0.150) r3.8 (0.15) typ 3 2 7.62 (0.300) 8 5 22.86 (0.900) 7 6 24 26
ak60a economy series rev. 02 may 97 ampss ? reference manual 38 recommended pcb layout the ak60a module may be mounted to a board either by soldering or by using spring sockets. 22 1 4 28 32 31 50.80 (2.000) 22.86 (0.900) 48.26 (1.900) 15.24 (0.600) 3.81 (0.150) typ 11.43 (0.450) 2.54 (0.100) a b 2.54 grid 0.05 (0.100 grid 0.002) hole size for pcb direct soldering hole size for spring socket mounting* hole size for m3.5 machine screw *spring sockets are available from astec in packs of 20 control pin sockets and 15 power pin sockets, part no. apa504-00-001. sockets are not suitable for output current greater than 10a per pin. a ?.0 + 0.15 / -0 (?.079 + 0.006 / -0) ?.5 +0.08 / -0 (?.177 +0.0031 / -0) for m3.5 b ?.0 +0.15 / -0 (?.079 +0.006 / -0) ?.67 0.05 (?.105 0.002) c ?.00 +0.15 / -0 (?.039 +0.006 / -0) ?.37 0.05 (?.054 0.002) recommended hole size table : view from pcb component side notes: 1. pcb component side view is shown. 2. all dimensions in mm and (inches). 3. general tolerance : .xx 0.1 (0.006). c 6 7 8 5 3 2 22.86 (0.900) materials : control pins are tin plated phospher-bronze. input and output pins are tin plated copper.
rev. 02 may 97 ampss ? reference manual mechanical information 39 heatsink mounting information heatsinks for ampss tm modules are available in a variety of sizes and fin orientation. mounting kits and thermal pads are also available. the table below shows the options available for ak60a economy series. a heatsink mounting kit provides the most conven- ient way to mount the heatsink to the module and then mount the assembly onto a circuit board ampss tm modules may be retained by their input and output pins only, or may be fixed to the board using bolts screwed into the tapped studs which are provided as part of the mounting kit. in both cases the studs provide clearance between the module and the circuit board to facilitate pcb cleaning opera- tions. note: baseplate and heatsink must be connected to protective earth 2 1 description model number dimensions free air therma l inches mm resistance heatsink, "60" size, vertical fin. apa501-60-001 2.26x2.32x0.6 57.5x59x15 3.8?c/w heatsink, "60" size, horizontal fin apa501-60-002 2.26x2.32x0.6 57.5x59x15 3.9?c/w heatsink, "60" size, vertical fin. apa501-60-003 2.26x2.32x0.9 57.5x59x22.5 3.3?c/w heatsink, "60" size, horizontal fin apa501-60-004 2.26x2.32x0.9 57.5x59x22.5 3.7?c/w heatsink, "60" size, vertical fin. apa501-60-005 2.26x2.32x1.5 57.5x59x37 2.8?c/w heatsink, "60" size, horizontal fin apa501-60-006 2.26x2.32x1.5 57.5x59x37 2.8?c/w heatsink, "60" size, low profile apa501-60-007 2.25x3.50x0.5 57.2x89x12 3.6?c/w thermal pad, "60" size apa502-60-001 mounting kit, tapped studs apa503-00-001 mounting kit, solder studs apa503-00-002 mounting kit, tapped studs apa503-00-007 for low profile heatsink mounting kit, solder studs apa503-00-008 for low profile heatsink spring sockets (20 cont. 15pwr) apa504-00-001 to provide optimal thermal contact between heatsink and module, it is recommended that the mating surface of the heatsink should have a surface flatness of no greater than 0.1mm. the use of a thermal pad or thermal grease is also recommended.
ak60a economy series rev. 02 may 97 ampss ? reference manual 40 the recommended torque of using ampss mounting kit for module/heatsink is: screw size torque m3 4-6kg-cm (3.5-5.2 lb-in) m3.5 6-8kg-cm (5.2-6.9 lb-in) it is assumed that all four mounting screws are being torqued to a common surface. other thermal management schemes are at customer discretion as long as the maximum thermal rating of the specific module is not exceeded. 1 2 3 4 heatsink torque sequence torque sequence:

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