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1 alq07 dc-dc converter technical reference notes date: aug., 9, 2003 alq07 dc-dc converter technical reference notes industry standard size ? 36-75v input, 3.3v/1 .8v, 3.3v/1.5v and 3.3v/1.2v dual output industry standard size: 2.28?x 1.45?? x 0.43??package options choice of positive logic or negative logic for cnt function choice of short pins or long pins description the alq07 series is a new open frame dc- dc converter. it is one of the most effective options available in component power. the alq07 series uses an industry standard package size: 36.8mm 57.9mm 10.9mm (2.28?x1.45?x0.43?) and standard pin-out configuration, pr ovides cnt and trim functions. alq07 series comes in 48v input versions , each of which uses a 2:1 input range of 36~75v. the series can provide 3.3v @6a+1.8v@4a, 3.3v@6a+1.5v@4a and 3.3v@6a+1.2v@4a dual output, and output is isolated from input. and the converters are capable of provid ing up to 30 watts of output power. features ? 2.28 ? x1.45 ?? x0.43 ? package ? basic isolation ? high power density ? 2:1 wide input of 36-75v ? cnt function ? trim function ? input under-voltage lockout ? output over-current protection ? output over-voltage protection ? wide operating case temperature range
2 alq07 dc-dc converter technical reference notes date: aug., 9, 2003 contents opti ons ........................................................................................................................ ..............1 descrip tion.................................................................................................................... .............1 module num berin g ............................................................................................................... ............4 electrical s pecificat ions ...................................................................................................... ..............5 input specif icati ons ........................................................................................................... ........5 absolute maxi mum ra tings ....................................................................................................... 6 output spec ificat ions.......................................................................................................... .......7 output specific ations (cont.).................................................................................................. ...8 feature spec ificat ions ......................................................................................................... ......9 characterist ic cu rves .......................................................................................................... ...........10 performance curves ? efficiency ............................................................................................10 performance curves ? out put performanc e curv es ...............................................................11 performance curves ? transient re sponse............................................................................12 performance curves ? trans ient respons e (con t.)................................................................13 performance curves ? trans ient respons e (con t.)................................................................14 performance curves ? star tup characte ristics........................................................................15 performance curves ? star tup from cnt contro l ...................................................................16 feature desc ription ............................................................................................................ ............17 cnt func tion ................................................................................................................... .......17 trim ........................................................................................................................... ..............18 minimum load requ irement s..................................................................................................19 output over-curr ent protection................................................................................................1 9 output over-volt age protec tion ...............................................................................................19 over temperatur e protec tion ..................................................................................................19 output f ilters ................................................................................................................. ..........19 decoup ling ..................................................................................................................... .........20 ground loops................................................................................................................... .......20 design consi deratio n ........................................................................................................... ..........21 typical app lication............................................................................................................ .......21 fusing......................................................................................................................... .............21 input reverse volt age protec tion ............................................................................................22 emc ............................................................................................................................ ............22 safety cons iderat ion ........................................................................................................... ....24 thermal cons iderat ion .......................................................................................................... .........25 mtbf........................................................................................................................... ...................25 mechanical cons iderat ions...................................................................................................... .......26 installa tion ................................................................................................................... ............26
3 alq07 dc-dc converter technical reference notes date: aug., 9, 2003 solder ing ...................................................................................................................... ...........26 mechanical chart (p in side view) ............................................................................................... .....27 ordering info rmation........................................................................................................... ............28
4 alq07 dc-dc converter technical reference notes date: aug., 9, 2003 module numbering a l q 07 fm 48 n- 7 1 2 3 4 5 6 7 8 explanation: 1 series name 2 low profile 3 quarter brick 4 output current: 7a 5 dual output: f: 3.3v, m: 1.5v, y: 1.8v 6 input voltage range: 36v to 72v 7?cnt logic, n---negative enabl e, default is positive enable 8?pin length: 6---3.80mm 8---2.80mm 7---5.8mm by default: 5mm
5 alq07 dc-dc converter technical reference notes date: aug., 9, 2003 electrical specifications unless otherwise indicated, specifications appl y over all operating input voltage and temperature conditions. standard test condi tion on a single unit is as following: ta(ambient): 25 o c +vin: 48v 2% -vin: return pin for +vin cnt: connect to com for negative logic produce open for positive logic produce +vo1, +vo2: connect to load com: connect to load (return) trim(vadj): open input specifications parameter device symbol min typ. max unit operating input voltage all v i 36 48 75 vdc maximum input current (v i = 0 to v i,max , i o = i o,max ) all i i,max - - 1 a input reflected-ripple current ( 5hz to 20mhz: 12 h source impedance: ta = 25 oc.) all i i - - 10 map-p no load input power (v i = v i,nom ) all - - - 3.3 w caution: this power module is not intern ally fused. an input line fuse must always be used.
6 alq07 dc-dc converter technical reference notes date: aug., 9, 2003 absolute maximum ratings stresses in excess of the absolute maxi mum ratings can cause permanent damage to the device. these are abs olute stress ratings only. functional operation of the device is not implied at these or any other conditions in excess of those given in the operational sections of the ips. exposure to absolute maximum ratings for extended periods can adversely affect device reliability. parameter device symbol min typ. max unit continuous: all v i 0 - 80 vdc input voltage transient (100ms) all v i, trans 0 - 100 vdc operating ambient temperat ure all ta -40 - 60 oc storage temperature all t stg -55 - 125 oc operating humidity all - - - 95 % basic input-output isolation (conditions: 50 a for 5 sec, slew rate of 1500v/10sec) all - - - 1,500 vdc output power all p o,max - - 30 w
7 alq07 dc-dc converter technical reference notes date: aug., 9, 2003 output specifications parameter device symbol min typ max unit ripple noise output ripple and noise (when measure ripple, noise and dynamic response, external 10uf tantalum capacitor and 0.1uf ceramic capacitor required for each output.) peak-to-peak (5 hz to 20 mhz) all vo1 vo2 - - - - 50 50 50 50 mvp-p mvp-p external load capacitance all vo1 vo2 0 0 - - 4000 4000 f f alq07fy vo1 set vo2 set 3.25 1.77 3.3 1.8 3.35 1.83 vdc vdc alq07fm vo1 set vo2 set 3.25 1.48 3.3 1.5 3.35 1.52 vdc vdc output voltage setpoint (rating input, 3.3v@4a+1.8v@6a, 3.3v@4a+1.5v@6a,3.3v@4a+1 .2v@6a, ta = 25 oc ) ALQ07FK vo1 set vo2 set 3.25 1.18 3.3 1.2 3.35 1.22 vdc vdc cross regulation (any one output vs. others) all 0.5 %v o,nom all (line regulation) vo1 vo2 - - 5 3 8 5 mv mv output regulation: line (vi=v i,min to v i,max ) load (i o = i o,min to i o,max , other i o =50%i o,nom ) (ta=-40 oc~60oc) all (load regulation) vo1 vo2 10 5 15 10 mv mv rated output current (io1+io2 10a) all i o1 i o2 0 0 - - 6 7 a a output current protection (when unit is shut down) all i o1 + i o2 11 - 15 a alq07fy - 80 82 % alq07fm - 80 82 % efficiency (rating input,3.3v@6a, 1.8v/1.5v/1.2v@0a ; ta = 25 c) ALQ07FK - 80 82 % switching frequency all - 360 khz
8 alq07 dc-dc converter technical reference notes date: aug., 9, 2003 output specifications (cont.) parameter device symbol min typ max unit load change from i o = 50% to 75% of i o,max ,when the other output current is 50% i o.nom all - - - 5 %v o peak deviation settling time (to v o,nom ) all - - - 200 sec load change from i o = 50% to 25% of i o,max ,when the other output current is 50% i o.nom. all - - - 5 %v o dynamic response*: ( ? i o / ? t = 1a/ s; v i = v i,nom ; ta = 25 c) peak deviation settling time (to v o,nom ) all - - - 200 sec turn-on time all - 5 10 msec vo1 0 3 %v o output voltage overshoot (3.3v@6a,1.8v@4a, 3.3v@6a,1.5v@4a, 3.3v@6a,1.2v@4a ta = 25 c) all vo2 0 5 %v o note: the output capacitance 220uf+220uf tantalum (each capacitor esr 100m )may be used to meet the s pecified dynamic response.
9 alq07 dc-dc converter technical reference notes date: aug., 9, 2003 feature specifications parameter device symbol min typ max unit logic low all -0.7 - 1.8 v enable pin voltage logic high all 3.5 - 12 v enable pin current (logic low) all - - 2.0 ma output voltage adjustment range all vo2 80 - 110 %vonom over temperature protect all t 101 115 output over-voltage (latch) all vo1 vo2(1.8v) vo2(1.5v) vo2(1.2v) 3.90 2.20 1.80 1.45 - - - - 5.00 2.60 2.26 1.80 v v v v turn-on point all - 31 34 36 v under-voltage lockout turn-off point all - 30 33 35 v isolation capacitance all - - 1500 - pf isolation resistance all - 10 - - m ? calculated mtbf (io = io,max ; ta = 25 c) all - - 1,800,000 - hours weight all - - - 30 g
10 alq07 dc-dc converter technical reference notes date: aug., 9, 2003 characteristic curves performance curves ? efficiency 45 50 55 60 65 70 75 80 85 123456789 total output current (a) efficiency (%) vin=36v vin=48v vin=75v 45 50 55 60 65 70 75 80 85 123456789 total output current (a) efficiency (%) vin=36v vin=48v vin=75v typical efficiency alq07fy* typical efficiency alq07fm* 40 45 50 55 60 65 70 75 80 123456789 total output current (a) efficiency (%) vin=36v vin=48v vin=75v typical efficiency ALQ07FK* note: both i o1 and i o2 increase by 10% until i o1 +i o2 =10a
11 alq07 dc-dc converter technical reference notes date: aug., 9, 2003 performance curves ? output performance curves typical output over-current alq07fy* typical output over-current alq07fm* typical output over-current ALQ07FK* note: when i o1 +i o2 10a, the module will shut down
12 alq07 dc-dc converter technical reference notes date: aug., 9, 2003 performance curves ? transient response alq07fy 25%-50%-25%i o1,nom (i o1 ) alq07fy 50%-75%-50%i o1,nom (i o1 ) load change, i o2 =50%i o2,nom (ch1:v o1 ,ch2:v o2 ) load change, i o2 =50%i o2,nom (ch1:v o1 ,ch2:v o2 ) alq07fy 25%-50%-25%i o2,nom (i o2 ) alq07fy 50%-75%-50%i o2,nom (i o2 ) load change, i o1 =50%i o1,nom (ch1:v o1 ,ch2:v o2 ) load change, i o1 =50%i o1,nom (ch1:v o1 ,ch2:v o2 )
13 alq07 dc-dc converter technical reference notes date: aug., 9, 2003 performance curves ? transient response (cont.) alq07fm 25%-50%-25%i o1,nom (i o1 ) alq07fm 50%-75%-50%i o1,nom (i o1 ) load change, i o2 =50%i o2,nom (ch1:v o1 ,ch2:v o2 ) load change, i o2 =50%i o2,nom (ch1:v o1 ,ch2:v o2 ) alq07fm 25%-50%-25%i o2,nom (i o2 ) alq07fm 50%-75%-50%i o2,nom (i o2 ) load change, i o1 =50%i o1,nom (ch1:v o1 ,ch2:v o2 ) load change, i o1 =50%i o1,nom (ch1:v o1 ,ch2:v o2 )
14 alq07 dc-dc converter technical reference notes date: aug., 9, 2003 performance curves ? transient response (cont.) ALQ07FK 25%-50%-25%i o1,nom (i o1 ) ALQ07FK 50%-75%-50%i o1,nom (i o1 ) load change, i o2 =50%i o2,nom (ch1:v o1 ,ch2:v o2 ) load change, i o2 =50%i o2,nom (ch1:v o1 ,ch2:v o2 ) ALQ07FK 25%-50%-25%i o2,nom (i o2 ) ALQ07FK 50%-75%-50%i o2,nom (i o2 ) load change, i o1 =50%i o1,nom (ch1:v o1 ,ch2:v o2 ) load change, i o1 =50%i o1,nom (ch1:v o1 ,ch2:v o2 )
15 alq07 dc-dc converter technical reference notes date: aug., 9, 2003 performance curves ? startup characteristics alq07fy start-up from power on alq07fm start-up from power on ALQ07FK start-up from power on
16 alq07 dc-dc converter technical reference notes date: aug., 9, 2003 performance curves ? startup from cnt control alq07fy start-up from cnt on alq07fm start-up from cnt on ALQ07FK start-up from cnt on
17 alq07 dc-dc converter technical reference notes date: aug., 9, 2003 feature description cnt function two cnt logic options are available. t he cnt logic, cnt voltage and the module working state are as the following table 1. l h open n on off off p off on on table 1 n--- means ?negative logic?, p--- means ?positive logic? l--- means ?low logic voltage?, -0.7v l 1.8v h--- means ?high logic voltage?, 3.5v h 12v on--- means ?module is on?, off--- means ?module is off? open--- means ?cnt pin is left open ? note: normally, v cnt 12v, but when cnt is left open, v cnt may reach to 15v. the following figure shows a few simple cnt circuits.
18 alq07 dc-dc converter technical reference notes date: aug., 9, 2003 trim the +vo2 output voltage of the alq07 seri es can be trimmed using the trim pin provided. applying a resistor r trim between the trim pin and either the com or +vo2 pin will cause the +vo2 output to increase by up to 10% or decrease by down to 20%. trimming up by more than 10% of t he nominal output may activate the ovp circuit or damage the converter. trim ming down more than 20% can cause the converter to regulate improperly. if the trim pin is not needed, it should be left open. trim up trim down
19 alq07 dc-dc converter technical reference notes date: aug., 9, 2003 minimum load requirements parameter device symbol typ unit minimum load all io1min io2min 0 0 a a output over-current protection for alq07 series dc/dc converters, when any output occurs over-current, all outputs shut down after 100-300ms. the module can be restarted by resetting the input power or cnt control. output over-voltage protection the over-voltage protection has a separate feedback loop, which is activated when the output voltage exceeds 120% to 150% of the nominal output voltage. the module can be restarted by resetting the input power or cnt control. over temperature protection alq07 dc/dc converters will shut down when the temperature of the board reaches 101 to 115 , and the module will automatically restart if the temperature of the board is under 100 . output filters when the load is sensitive to ripple an d noise, an output filter can be added to minimize the effects. a simple output f ilter to reduce output ripple and noise can be made by connecting a capacitor c out across the output as shown in figure ?output ripple filter?. the recommended value fo r the output tantalum capacitor c out is 220uf.
20 alq07 dc-dc converter technical reference notes date: aug., 9, 2003 extra care should be taken when long leads or traces are used to provide power to the load. long lead lengths increase the chance for noise to appear on the lines. under these conditions c1 can be added across the load, with a 0.1uf ceramic capacitor c1 in parallel generally as show n in figure ?output ripple filter for a distant load?. decoupling noise on the power distribution system is not always created by the converter. high speed analog or digital loads with dyna mic power demands can cause noise to cross the power inductor back onto the input lines. noise can be reduced by decoupling the load. in most cases, connecting a 10uf tantalum or ceramic capacitor in parallel with a 0.1uf cerami c capacitor across the load will decouple it. the capacitors should be connected as close to the load as possible. ground loops ground loops occur when different circuits are given multiple paths to common or earth ground, as shown in figure ?ground loops?. multiple ground points can be slightly different potential and cause current flow through t he circuit from one point to another. this can result in additional nois e in all the circuits. to eliminate the problem, circuits should be designed with a single ground connection as shown in figure ?single point ground?.
21 alq07 dc-dc converter technical reference notes date: aug., 9, 2003 design consideration typical application cin: recommended input capacitor 47uf, aluminum electrolytic type cout: recommended output capacitor 220uf , tantalum type, each capacitor esr<100m c1,c2: recommended 0.1uf ceramic capacitor note: io1+io2 10a fusing the alq07 power modules have no internal fu se. an external fuse must always be employed! to meet international safety requirements, a 250 volt rated fuse should be used. if one of the input lines is connec ted to chassis ground, then the fuse must be placed in the other input line. standard safety agency regulations require input fusing. recommended fuse rating for the alq07 series is 2a.
22 alq07 dc-dc converter technical reference notes date: aug., 9, 2003 input reverse voltage protection under installation and cabling conditions where reverse polarity across the input may occur, reverse polarity protecti on is recommended. prot ection can easily be provided as shown in figure ?reverse polari ty protection circuit?. in both cases the diode used is rated for 3a/100v. placing the diode across the inputs rather than in-line with the input offers an advantage in that the diode only c onducts in a reverse polarity condition, this increases circ uit efficiency and ther mal performance. reverse polarity protection circuit emc input filters are included in the conver ters to help achieve standard system emissions certifications. some users howev er, may find that additional input filtering is necessary. the alq07 series has an in ternal switching frequency of 360khz so a high frequency capacitor mounted close to the input terminals produces the best results. to reduce reflected noise, a ca pacitor can be added across the input as shown in figure ?ripple reject ion input filter?, forming a filter. a 47uf/100v electrolytic capacitor is recommended for c in . ripple rejection input filter for conditions where emi is a concern, a different input filt er can be used. the following figure ?emi reduction filter? show s a filter designed to reduce emi effects. alq07 series can meet en55022 class a with the following figure.
23 alq07 dc-dc converter technical reference notes date: aug., 9, 2003 the recommended values can refer to the following table: component value/rating type description price c1 none none none c2 2.2uf/250vac metal film capacitor c3 c4 c8 c9 c10 c11 4700pf/250vac safe ty y capacitor c5 c6 0.022uf/275vac safety y capacitor c7 1000pf/100v ceramic c12 c13 0.1uf/50v ceramic cin 47uf/100v aluminum electrolytic aluminum electrolytic 100v 47uf20 10*12.5 105 cout 220uf/10v tantalum each capacitor esr<100m ? l1 2.7mh common mode ferrite core 16 8/8 ferrite l2 l3 -- ferrite bead ferrite, 1206 package, 3a/50 ?
24 alq07 dc-dc converter technical reference notes date: aug., 9, 2003 safety consideration for safety-agency approval of the system in which the power module is used, the power module must be installed in compliance with the spacing and separation requirements of the end-use safety agency standard, i.e., ul1950, csa c22.2 no. 950-95, and en60950. the alq07 series i nput-to-output isolat ion is an basic insulation. the dc/dc power module should be installed in end-use equipment, in compliance with the requirements of the ultimate application, and is intended to be supplied by an isolated se condary circuit. when the s upply to the dc/dc power module meets all the requirements for selv( <60vdc), the output is considered to remain within selv limits (level 3). if c onnected to a 60vdc power system, double or reinforced insulation must be provided in t he power supply that isolates the input from any hazardous voltages, including the ac mains. one input pin and one output pin are to be grounded or both the input and output pins are to be kept floating. single fault testing in the power supply mu st be performed in combination with the dc/dc power module to demons trate that the output m eets the requirement for selv. the input pins of the m odule are not operator accessible. note: do not ground either of the input pins of the module, without grounding one of the output pins. this may allow a non-selv voltage to appear between the output pin and ground.
25 alq07 dc-dc converter technical reference notes date: aug., 9, 2003 thermal consideration when 48v input, 60 ambient temperature, and 150lf m airflow, alq07 series are rated for full power, and in this conditi on the case temperature can reach 90 . for operation above ambient temperature of 60 , output power must be derated as shown in figure ?temperature derating?, m eantime, airflow at least 150lfm over the converter must be provided to make the module working properly. the case temperature should be used to determi ne maximum temperature limits. the minimum operating temperature for the alq07 is -40 . temperature derating curves mtbf the mtbf, calculated in accordance wi th bellcore tr-nwt-000332 is 1,800,000 hours. obtaining this mtbf in practice is entirely po ssible. if the ambient air temperature is expected to exceed +25 , then we also advise an oriented for the best possible cooling in the air stream. astec can supply replacements for converte rs from other manufacturers, or offer custom solutions. please cont act the factory for details.
26 alq07 dc-dc converter technical reference notes date: aug., 9, 2003 mechanical considerations installation although alq07 series converters can be mounted in any orientation, free air-flowing must be taken. normally power components are always put at the end of the airflow path or have the separate ai rflow paths. this can keep other system equipment cooler and increase component life spans. soldering alq07 series converters are compatible with standard wave soldering techniques. when wave soldering, the converter pins should be preheated for 20-30 seconds at 110 , and wave soldered at 260 for less than 10 seconds. when hand soldering, the iron temp erature should be maintained at 425 and applied to the converter pins for less than 5 seconds. longer exposure can cause internal damage to the converter. cleani ng can be performed with cleaning solvent ipa or with water.
27 alq07 dc-dc converter technical reference notes date: aug., 9, 2003 mechanical chart (pin side view) note: pin length is optional default: 5.8mm 0.5mm ( 0.228in. 0.02in.) product name with suffix ?-4?: 4.8mm 0.5mm ( 0.189in. 0.02in.) product name with suffix ?-6?: 3.8mm 0.25mm ( 0.15in. 0.01in.) product name with suffix ?-8?: 2.8mm 0.25mm ( 0.11in. 0.01in.)
28 alq07 dc-dc converter technical reference notes date: aug., 9, 2003 ordering information model number input voltage (v) output voltage (v) output current * (a) ripple (mv ms) max. noise (mv pp) max. efficiency % typ. vo1 3.3 6 50 50 alq07fy 36-75 vo2 1.8 4 50 50 81 vo1 3.3 6 50 50 alq07fm 36-75 vo2 1.5 4 50 50 81 vo1 3.3 6 50 50 ALQ07FK 36-75 vo2 1.2 4 50 50 81 note: io1: 0a~6a, io2: 0a~7a, io1+io2 10a.

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