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ericsson internal product specification 1 (4) prepared (also subject responsible if other) no. eab/fc/p maria rosendahl 1/1301-bmr658 approved checked date rev reference eab/fjb/gkf (natalie johansson) mictojo 2008-06-03 b key features ? industry standard low profile eighth-brick 58.4 x 22.7 x 10.1 mm (2.3 x 0.894 x 0.397 in.) ? high efficiency, typ. 95 % at 12 v half load ? 1500 vdc input to output isolation ? meets isolation requirements equivalent to basic insulation according to iec/en/ul 60950 ? more than 1.3 million hours mtbf general characteristics ? n+1 parallelable ? input under voltage protection ? over temperature protection ? output over voltage protection ? output short-circuit protection ? remote control ? optional baseplate ? highly automated manufacturing ensures quality ? iso 9001/14001 certified supplier safety approvals design for environment meets requirements in high- temperature lead-free soldering processes. limited internal table of contents 1 (1) prepared (also subject responsible if other) no. sec/s david xie 001 52-en/lzt 146 384 uen approved checked date rev reference eweixie 2008-12-15 c contents general info rmation ............................................................. 2 safety specifi cation ............................................................. 3 absolute maximu m rating s ............................................................. 4 product program ordering no. 5.0 v, 40 a / 200 w electr ical specification pkb 4201 b pi ................................. 5 12.0 v, 20 a / 240 w electri cal specification pkb 4204 b pi ................................. 8 emc specifica tion ........................................................... 11 operating info rmation ........................................................... 12 thermal consid erations ........................................................... 13 connectio ns ........................................................... 14 mechanical in formation ........................................................... 15 soldering info rmation ........................................................... 18 delivery info rmation ........................................................... 19 product qualificatio n specificat ion ........................................................... 20 e pkb 4000b pi intermediate bus converters, input 36-75 v, 40 a / 240 w en/lzt 146 384 r2a dec 2008 ? ericsson power modules ab technical specifcation
ericsson internal product specification 2 (4) prepared (also subject responsible if other) no. eab/fc/p maria rosendahl 1/1301-bmr658 approved checked date rev reference eab/fjb/gkf (natalie johansson) mictojo 2008-06-03 b general information ordering information see contents for individual product ordering numbers. option suffix ordering no. surface mount positive remote control logic lead length 3.69 mm (0.145 in) lead length 4.57 mm (0.180 in) increased stand-off height baseplate si p la lb m hs pkb 4204b si pkb 4204b pip pkb 4204b pila pkb 4204b pilb pkb 4204b pim pkb 4204b pihs note 1: as an example a positive logic, short pin product with baseplate would be pkb 4204 piphsla. reliability the mean time between failure (mtbf) is calculated at full output power and an operating ambient temperature (t a ) of +40c, which is a typical condition in information and communication technology (ict) equipment. different methods could be used to calculate the predicted mtbf and failure rate which may give different results. ericsson power modules currently uses telcordia sr332. predicted mtbf for the series is: - 1.3 million hours according to telcordia sr332, issue 1, black box technique. telcordia sr332 is a commonly used standard method intended for reliability calculations in ict equipment. the parts count procedure used in this method was originally modelled on the methods from mil-hdbk-217f, reliability predictions of electronic equipment. it assumes that no reliability data is available on the actual units and devices for which the predictions are to be made, i.e. all predictions are based on generic reliability parameters. compatibility with rohs requirements the products are compatible with the relevant clauses and requirements of the rohs directive 2002/95/ec and have a maximum concentration value of 0.1% by weight in homogeneous materials for lead, mercury, hexavalent chromium, pbb and pbde and of 0.01% by weight in homogeneous materials for cadmium. exemptions in the rohs directive utilized in ericsson power modules products include: - lead in high melting temperature type solder (used to solder the die in semiconductor packages) - lead in glass of electronics components and in electronic ceramic parts (e.g. fill material in chip resistors) - lead as an alloying element in copper alloy containing up to 4% lead by weight (used in connection pins made of brass) quality statement the products are designed and manufactured in an industrial environment wher e quality systems and methods like iso 9000, 6 (sigma), and spc are intensively in use to boost the continuous improvements strategy. infant mortality or early failures in the products are screened out and they are subjected to an ate-based final test. conservative design rules, design reviews and product qualifications, plus the high competence of an engaged work force, contribute to the high quality of our products. warranty warranty period and conditions are defined in ericsson general terms and conditions of sale. limitation of liability ericsson does not make any ot her warranties, expressed or implied including any warranty of merchantability or fitness for a particular purpose (includi ng, but not limited to, use in life support applications, where malfunctions of product can cause injury to a person?s health or life). e pkb 4000b pi intermediate bus converters, input 36-75 v, 40 a / 240 w en/lzt 146 384 r2a dec 2008 ? ericsson power modules ab technical specifcation 2
ericsson internal product specification 3 (4) prepared (also subject responsible if other) no. eab/fc/p maria rosendahl 1/1301-bmr658 approved checked date rev reference eab/fjb/gkf (natalie johansson) mictojo 2008-06-03 b safety specification general information ericsson power modules dc/dc converters and dc/dc regulators are designed in accordance with safety standards iec/en/ul60950, safety of information technology equipment . iec/en/ul60950 contains requirements to prevent injury or damage due to the following hazards: ? electrical shock ? energy hazards ? fire ? mechanical and heat hazards ? radiation hazards ? chemical hazards on-board dc-dc converters and dc/dc regulators are defined as component power supplies. as components they cannot fully comply with the provisions of any safety requirements without ?con ditions of acceptability?. clearance between conductors and between conductive parts of the component powe r supply and conductors on the board in the final product must meet the applicable safety requirements. certain conditions of acceptability apply for component power supp lies with limited stand-off (see mechanical information for further information). it is the responsibility of the installer to ensure that the final product housing these components complies with the requirements of all applicable safety standards and directives for the final product. component power supplies for general use should comply with the requirements in iec60950, en60950 and ul60950 ?safety of information technology equipment?. there are other more product related standards, e.g. ieee802.3af ?ethernet lan/man data terminal equipment power?, and ets300132-2 ?power supply interface at the input to telecommunications equipment; part 2: dc?, but all of these standards are based on iec/en/ul60950 with regards to safety. ericsson power modules dc/dc converters and dc/dc regulators are ul60950 recognized and certified in accordance with en60950. the flammability rating for all construction parts of the products meets requirements for v-0 class material according to iec 60695-11-10. the products should be installed in the end-use equipment, in accordance with the requirements of the ultimate application. normally the output of the dc/dc converter is considered as selv (safety extra low voltage) and the input source must be isolated by minimum double or reinforced insulation from the primary circuit (ac mains) in accordance with iec/en/ul60950. isolated dc/dc converters it is recommended that a slow blow fuse with a rating twice the maximum input current per selected product be used at the input of each dc/dc converter. if an input filter is used in the circuit the fuse should be placed in front of the input filter. in the rare event of a component problem in the input filter or in the dc/dc converter that imposes a short circuit on the input source, this fuse will provide the following functions: ? isolate the faulty dc/dc converter from the input power source so as not to affect the operation of other parts of the system. ? protect the distribution wiring from excessive current and power loss thus preventing hazardous overheating. the galvanic isolation is verified in an electric strength test. the test voltage (v iso ) between input and output is 1500 vdc or 2250 vdc for 60 seconds (refer to product specification). leakage current is less than 1 a at nominal input voltage. 24 v dc systems the input voltage to the dc/dc converter is selv (safety extra low voltage) and the output remains selv under normal and abnormal operating conditions. 48 and 60 v dc systems if the input voltage to the dc/dc converter is 75 vdc or less, then the output remains selv (safety extra low voltage) under normal and abnormal operating conditions. single fault testing in the input power supply circuit should be performed with the dc/dc converter connected to demonstrate that the input voltage does not exceed 75 vdc. if the input power source circ uit is a dc power system, the source may be treated as a tnv2 circuit and testing has demonstrated compliance with selv limits and isolation requirements equivalent to basic insulation in accordance with iec/en/ul60950. non-isolated dc/dc regulators the input voltage to the dc/dc regulator is selv (safety extra low voltage) and the output remains selv under normal and abnormal operating conditions. e pkb 4000b pi intermediate bus converters, input 36-75 v, 40 a / 240 w en/lzt 146 384 r2a dec 2008 ? ericsson power modules ab technical specifcation 3
ericsson internal product specification 1 (8) prepared (also subject responsible if other) no. eab/fjb/gmg tord johansson 2/1301-bmr 658 uen approved checked date rev reference eab/fjb/gm (magnus broman) (michorg) 2008-12-18 d absolute maximum ratings characteristics min typ max unit t ref operating temperature (see thermal co nsideration section) -40 +125 c t s storage temperature -40 +125 c v i input voltage -0.5 +80 v v iso isolation voltage (inp ut to output test voltage) 1500 vdc v tr input voltage transient (t p 100 ms) 100 v positive logic option -0.5 15 v v rc remote control pin voltage (see operating information section) negative logic option -0.5 15 v stress in excess of absolute maximum ratings may cause permanent damage. absolute maximum ratings, sometimes referred to as no destruction limits, are normally tested with one parameter at a time exceeding the limits of output data or electrical characteristics. if exposed to s tress above these limits, function and performance may degrade in an unspecified manner. fundamental circuit diagram rc control +in -out +out -in ovp driver e pkb 4000b pi intermediate bus converters, input 36-75 v, 40 a / 240 w en/lzt 146 384 r2a dec 2008 ? ericsson power modules ab technical specifcation 4
ericsson internal product specification 2 (8) prepared (also subject responsible if other) no. eab/fjb/gmg tord johansson 2/1301-bmr 658 uen approved checked date rev reference eab/fjb/gm (magnus broman) (michorg) 2008-12-18 d 5 v, 40 a / 200 w electrical specification pkb 4201b pi t ref = -30 to +90 oc, v i = 36 to 75 v, unless otherwise specified under conditions. typical values given at: t ref = +25 c, v i = 53 v , max i o , unless otherwise specified under conditions. characteristics conditions min typ max unit v i input voltage range 36 75 v v ioff turn-off input voltage decreasing input voltage 32 33 35 v v ion turn-on input voltage increasing input voltage 33 35 36 v c i internal input capacitance 11 f v i = 75 v 0 194 v i = 53 v 0 194 p o output power v i = 36 v 0 194 w 50 % of max i o , v i = 53 v 94.5 efficiency max i o , v i = 53 v 94.0 % p d power dissipation max i o 12 18 w p li input idling power i o = 0 a, v i = 53 v 4 w p rc input standby power v i = 53 v (turned off with rc) 0.12 w f s switching frequency 0-100 % of max i o 180 khz v oi output voltage initial setting and accuracy t ref = +25 c, v i = 53 v , i o = 20 a 4.9 5.0 5.1 v output voltage tolerance band 0-100 % of max i o , v i = 36 v to 75 v, see note 3 4.5 5.5 v idling voltage i o = 0 a 4.75 5.5 v line regulation v i = 36 v to 75 v 0.04 v v o load regulation v i = 53 v, 0-100 % of max i o 0.1 0.25 0.4 v v tr load transient voltage deviation 0.27 v t tr load transient recovery time v i = 53 v, load step 50-75-50 % of max i o , di/dt = 1 a/ s, see note 1 0.06 ms t r ramp-up time (from 10 ? 90 % of v oi ) 1 4 7 ms t s start-up time (from v i connection to 90 % of v oi ) 0-100 % of max i o , see note 1 & 2 5 10 14 ms max i o , see note 1 0.5 m s t f v i shut-down fall time (from v i off to 10 % of v o ) i o = 0 a, see note 1 16 s rc start-up time max i o , see note 1 & 2 7 ms max i o , see note 1 0.3 ms t rc rc shut-down fall time (from rc off to 10 % of v o ) i o = 0 a, see note 1 16 s i o output current 0 40 a i lim current limit threshold t ref < max t ref 42 50 65 a i sc short circuit current t ref = 25 oc 53 a c out recommended capacitive load t ref = 25oc, see note 4 1000 f v oac output ripple & noise see ripple & noise section, max i o 110 220 mvp-p input over voltage protection 79 ovp output over voltage protection 7.3 v note 1: a 1 m f external output capacitance was used (esr approx. 20 mohm). note 2: at ramp up with low load will the output voltage have a negative slope during a short time. note 3: negative temperature coefficient: -3 mv/oc. note 4: low esr type. e pkb 4000b pi intermediate bus converters, input 36-75 v, 40 a / 240 w en/lzt 146 384 r2a dec 2008 ? ericsson power modules ab technical specifcation 5
ericsson internal product specification 3 (8) prepared (also subject responsible if other) no. eab/fjb/gmg tord johansson 2/1301-bmr 658 uen approved checked date rev reference eab/fjb/gm (magnus broman) (michorg) 2008-12-18 d 5 v, 40 a / 200 w typical characteristics efficiency power dissipation 80 85 90 95 100 0 10203040[a] [%] 36 v 48 v 53 v 75 v 0 5 10 15 20 0 1 0 203040[a] [w] 36 v 48 v 53 v 75 v efficiency vs. load current and input voltage at t ref = +25 c dissipated power vs. load current and input voltage at t ref = +25 c output current derating, open frame output current derating, base plate option 0 10 20 30 40 0 20406080100[c] [a] 3.0 m/s 2.0 m/s 1.5 m/s 1.0 m/s 0.5 m/s nat. conv. 0 10 20 30 40 0 2040 6080100[c] [a] 3.0 m/s 2.0 m/s 1. 5 m / s 1. 0 m / s 0.5 m/s nat. conv. available load current vs. ambient air temperature and airflow at v i = 53 v. see thermal consideration section. available load current vs. ambient air temperature and airflow at v i = 53 v. see thermal consideration section. output characteristics current limit characteristics 4.50 4.75 5.00 5.25 5.50 0 10203040[a] [v] 36 v 48 v 53 v 75 v 3.5 4.0 4.5 5.0 5.5 40 44 48 52 56 60 [a ] [v] 36 v 48 v 53 v 75 v o utput voltage vs. load current at t ref = +25 c o utput voltage vs. load current at i o > max i o , t ref = +25 c e pkb 4000b pi intermediate bus converters, input 36-75 v, 40 a / 240 w en/lzt 146 384 r2a dec 2008 ? ericsson power modules ab technical specifcation 6
ericsson internal product specification 4 (8) prepared (also subject responsible if other) no. eab/fjb/gmg tord johansson 2/1301-bmr 658 uen approved checked date rev reference eab/fjb/gm (magnus broman) (michorg) 2008-12-18 d 5 v, 40 a / 200 w typical characteristics pkb 4201b pi start-up shut-down start-up enabled by connecting v i at: t ref = +25 c, v i = 53 v, i o = 40 a resistive load. c out = 1 mf. top trace: output voltage (2 v/div.). bottom trace: input voltage (50 v/div.). time scale: (5 ms/div.). shut-down enabled by disconnecting v i at: t ref = +25 c, v i = 53 v, i o = 40 a resistive load. c out = 1 mf. top trace: output voltage (2 v/div.). bottom trace: input voltage (50 v/div.). time scale: (1 ms/div.). output ripple & noise output load transient response output voltage ripple at: t ref = +25 c, v i = 53 v, i o = 40 a resistive load. trace: output voltage (50 mv/div.). time scale: (2 s/div.). output voltage response to load current step- change (20-30-20 a) at: t ref =+25 c, v i = 53 v, c out = 1 m f. top trace: output voltage (0.5 v/div.). bottom trace: load current (20 a/div.). time scale: (0.1 ms/div.). e pkb 4000b pi intermediate bus converters, input 36-75 v, 40 a / 240 w en/lzt 146 384 r2a dec 2008 ? ericsson power modules ab technical specifcation 7
ericsson internal product specification 5 (8) prepared (also subject responsible if other) no. eab/fjb/gmg tord johansson 2/1301-bmr 658 uen approved checked date rev reference eab/fjb/gm (magnus broman) (michorg) 2008-12-18 d 12 v, 20 a / 240 w electrical specification pkb 4204b pi t ref = -30 to +90 oc, v i = 36 to 75 v, unless otherwise specified under conditions. typical values given at: t ref = +25 c, v i = 53 v , max i o , unless otherwise specified under conditions. characteristics conditions min typ max unit v i input voltage range 36 75 v v ioff turn-off input voltage decreasing input voltage 32 33 35 v v ion turn-on input voltage increasing input voltage 33 35 36 v c i internal input capacitance 11 f v i = 75 v 0 234 v i = 53 v 0 234 p o output power v i = 36 v 0 220 w 50 % of max i o , v i = 53 v 95.5 efficiency max i o , v i = 53 v 94.5 % p d power dissipation max i o 13.5 23 w p li input idling power i o = 0 a, v i = 53 v 3 w p rc input standby power v i = 53 v (turned off with rc) 0.1 w f s switching frequency 0-100 % of max i o 180 khz v oi output voltage initial setting and accuracy t ref = +25 c, v i = 53 v , i o = 10 a 11.85 12.00 12.15 v output voltage tolerance band 0-100 % of max i o , v i = 38 v to 75 v, see note 1 10.8 12.6 v idling voltage i o = 0 a 11.4 12.6 v line regulation v i = 38 v to 75 v, see note 2 0.2 v v o load regulation v i = 53 v, 0-100 % of max i o 0.3 0.6 0.9 v v tr load transient voltage deviation 0.4 v t tr load transient recovery time v i = 53 v, load step 50-75-50 % of max i o , di/dt = 1 a/ s, see note 3 0.25 ms t r ramp-up time (from 10 ? 90 % of v oi ) 2 5.5 9 ms t s start-up time (from v i connection to 90 % of v oi ) 0-100 % of max i o 6 11 16 ms max i o 0.1 m s t f v i shut-down fall time (from v i off to 10 % of v o ) i o = 0 a 0.35 s rc start-up time max i o 8 ms max i o 0.1 ms t rc rc shut-down fall time (from rc off to 10 % of v o ) i o = 0 a 0.35 s i o output current 0 20 a i lim current limit threshold t ref < max t ref 21 27 33 a c out recommended capacitive load t ref = 25oc 0 f i sc short circuit current t ref = 25 oc 29 a v oac output ripple & noise see ripple & noise section, max i o 80 240 mvp-p input over voltage protection 79 ovp output over voltage protection 13.5 v note 1: at v i = 36 v to 38 v is the lower limit 10.5 v. note 2: at v i = 36 v to 75 v is the typical value 0.6 v. note 3: a 220 f external output capacitance was with low esr was used. e pkb 4000b pi intermediate bus converters, input 36-75 v, 40 a / 240 w en/lzt 146 384 r2a dec 2008 ? ericsson power modules ab technical specifcation 8
ericsson internal product specification 6 (8) prepared (also subject responsible if other) no. eab/fjb/gmg tord johansson 2/1301-bmr 658 uen approved checked date rev reference eab/fjb/gm (magnus broman) (michorg) 2008-12-18 d 12 v, 20 a / 240 w typical characteristics pkb 4204b pi efficiency power dissipation 80 85 90 95 100 0 5 10 15 20 [a] [%] 36 v 38 v 53 v 75 v 0 5 10 15 20 0 5 10 15 20 [a] [w] 36 v 38 v 53 v 75 v efficiency vs. load current and input voltage at t ref = +25 c dissipated power vs. load current and input voltage at t ref = +25 c output current derating, open frame output current derating, base plate option 0 5 10 15 20 0 20406080100[c] [a] 3.0 m/s 2.0 m/s 1.5 m/s 1.0 m/s 0.5 m/s nat. conv. 0 5 10 15 20 0 20406080100[c] [a] 3.0 m/s 2.0 m/s 1.5 m/s 1.0 m/s 0.5 m/s nat. conv. available load current vs. ambient air temperature and airflow at v i = 53 v. see thermal consideration section. available load current vs. ambient air temperature and airflow at v i = 53 v. see thermal consideration section. output characteristics current limit characteristics 10.0 10.5 11.0 11.5 12.0 12.5 13.0 0 5 10 15 20 [a] [v] 36 v 38 v 53 v 75 v 6 8 10 12 14 20 22 24 26 28 30 [a] [v] 36 v 38 v 53 v 75 v o utput voltage vs. load current at t ref = +25 c o utput voltage vs. load current at i o > max i o , t ref = +25 c e pkb 4000b pi intermediate bus converters, input 36-75 v, 40 a / 240 w en/lzt 146 384 r2a dec 2008 ? ericsson power modules ab technical specifcation 9
ericsson internal product specification 7 (8) prepared (also subject responsible if other) no. eab/fjb/gmg tord johansson 2/1301-bmr 658 uen approved checked date rev reference eab/fjb/gm (magnus broman) (michorg) 2008-12-18 d 12 v, 20 a / 240 w typical characteristics pkb 4204b pi start-up shut-down start-up enabled by connecting v i at: t ref = +25 c, v i = 53 v, i o = 20 a resistive load. top trace: output voltage (5 v/div). bottom trace: input voltage (50 v/div). time scale: (5 ms/div). shut-down enabled by disconnecting v i at: t ref = +25 c, v i = 53 v, i o = 20 a resistive load. top trace: output voltage (5 v/div.). bottom trace: input voltage (50 v/div.). time scale: (0.1 ms/div.). output ripple & noise output load transient response output voltage ripple at: t ref = +25 c, v i = 53 v, i o = 20 a resistive load. trace: output voltage (50 mv/div). time scale: (2 s/div.). output voltage response to load current step- change (10-15-10 a) at: t ref =+25 c, v i = 53 v, c out = 220 f. top trace: output voltage (0.5 v/div.). bottom trace: load current (5 a/div). time scale: (0.1 ms/div.). e pkb 4000b pi intermediate bus converters, input 36-75 v, 40 a / 240 w en/lzt 146 384 r2a dec 2008 ? ericsson power modules ab technical specifcation 10
ericsson internal product specification 1 (5) prepared (also subject responsible if other) no. eab/fjb/gkj tord johan sson 3/1301-bmr 658 uen approved checked date rev reference eab/fjb/gkg (magnus broman) (micmros) 2008-06-03 a emc specification conducted emi measured according to en55022, cispr 22 and fcc part 15j (see test set-up). see design note 009 for detailed information. the fundamental switching frequency is 180 khz for pkb 4204b pi @ v i = 53 v, max i o . conducted emi input terminal value (typ) emi without filter external filter (class b) required external input filter in order to meet class b in en 55022, cispr 22 and fcc part 15j. components: c1,2,3 = 1 f (100 v, ceramic) c4,5 = 2.2 nf (2 kv, ceramic) c6 = 220 f (100 v, electrolytic) l1,2 = 809 h (common mode) emi with filter test set-up layout recommendation the radiated emi performance of the dc/dc converter will depend on the pcb layout and ground layer design. it is also important to consider the stand-off of the dc/dc converter. if a g round la y er is used, it should be connected to the output of the dc/dc converter and the equipment ground or chassis. a ground layer will increase the stray capacitance in the pcb and improve the high frequency emc performance. output ripple and noise output ripple and noise measured according to figure below. see design note 022 for detailed information. 10uf 0.1uf -vout +vout *conductor from vout to capacitors = 50mm [1.97in.] bnc connector to scope tantalum capacitor ceramic capacitor + output ripple and noise test setup e pkb 4000b pi intermediate bus converters, input 36-75 v, 40 a / 240 w en/lzt 146 384 r2a dec 2008 ? ericsson power modules ab technical specifcation 11
ericsson internal product specification 2 (5) prepared (also subject responsible if other) no. eab/fjb/gkj tord johan sson 3/1301-bmr 658 uen approved checked date rev reference eab/fjb/gkg (magnus broman) (micmros) 2008-06-03 a operating information input voltage the input voltage range 36 to 75 vdc meets the requirements of the european telecom standard ets 300 132-2 for normal input voltage range in ?48 and ?60 vdc systems, -40.5 to -57.0 v and ?50.0 to -72 v respectively. at input voltages exceeding 75 v, the power loss will be higher than at normal input voltage and t ref must be limited to absolute max 125 c. the absolute maximum continuous input voltage is 80 vdc. turn-off input voltage the dc/dc converters monitor the input voltage and will turn on and turn off at predetermined levels. the minimum hysteresis between on and off input voltage is 1.0 v. remote control (rc) the products are fitted with a remote control function referenced to the primary negative input connection (- in), with positive lo g ic option available. the rc function allows the product to be turned on/off by an external device like a semiconductor or mechanical switch. the rc pin has an internal pull up resistor to + in. the maximum required sink curre nt is less than 1 ma. when the rc pin is left open, the volta g e g enerated on the rc pin is 5-10 v. the second option is ?positive logic? remote control, which can be ordered by adding the suffix ?p? to the end of the part number. the dc/dc converter will turn on when the input voltage is applied with the rc pin open. turn off is achieved by connecting the rc pin to the - in. to ensure safe turn off the voltage difference between rc pin and the - in pin shall be less than 1 v. the dc/dc converter will restart automatically when this connection is opened. input and output impedance the impedance of both the input source and the load will interact with the impedance of the dc/dc converter. it is important that the input source has low characteristic impedance. minimum recommended external input capacitance is 220 f. the performance in some applications can be enhanced by addition of external capacitance as described under external decoupling capacitors. external decoupling capacitors when powering loads with significant dynamic current requirements, the voltage regulation at the point of load can be improved b y addition of decouplin g capacitors at the load. the most effective technique is to locate low esr ceramic and electrolytic capacitors as close to the load as possible, using several parallel capacitors to lower the effective esr. the ceramic capacitors will handle high-frequency dynamic load changes while the electrolytic capacitors are used to handle low frequency dynamic load changes. ceramic capacitors will also reduce any high frequency noise at the load. it is equally important to use low resistance and low inductance pcb layouts and cabling. for semi regulated dc/dc converters, such as pkb-b intermediate bus converters, there is no limit on the value of output capacitance that may be used. the user should be aware, however, that large values of capacitance will affect the ramp-up time of the dc/dc converter output voltage during start-up. for further information please contact your local ericsson power modules representative. parallel operation the converters can be paralleled for redundancy if external o- ring diodes are used in series with the outputs. over temperature protection (otp) the dc/dc converters are protected from thermal overload by an internal over temperature shutdown circuit. when t ref as defined in thermal consideration section exceeds 125c the dc/dc converter will shut down. the dc/dc converter will make continuous attempts to start up (non-latching mode) and resume normal operation automatically when the temperature has dropped below the temperature threshold. over voltage protection (ovp) the dc/dc converters have an output over volta g e protection that normally will clamp the output voltage to the ovp threshold level. if the output voltage should increase to the ovp threshold level very fast then the dc/dc converter can shut down and make attempts to start up (non-latching mode). after removal of the over voltage condition the dc/dc converter will resume to normal operation automatically. over current protection (ocp) the dc/dc converters include current limiting circuitry for protection at continuous overload. the output voltage will decrease towards zero for output currents in excess of max output current (max i o ). the dc/dc converter will resume normal operation after removal of the overload. the load distribution should be designed for the maximum output short circuit current specified. e pkb 4000b pi intermediate bus converters, input 36-75 v, 40 a / 240 w en/lzt 146 384 r2a dec 2008 ? ericsson power modules ab technical specifcation 12
ericsson internal product specification 3 (5) prepared (also subject responsible if other) no. eab/fjb/gkj tord johan sson 3/1301-bmr 658 uen approved checked date rev reference eab/fjb/gkg (magnus broman) (micmros) 2008-06-03 a thermal consideration general the products are designed to operate in different thermal environments and sufficient cooling must be provided to ensure reliable operation. for products mounted on a pcb without a heat sink attached coolin g is achieved mainl y b y conduction, from the pins to the host board, and convection, which is dependant on the airflow across the product. increased airflow enhances the cooling of the converter. the output current derating graph found in the output section for each model provides the available output current vs. ambient air temperature and air velocity at v in = 53 v. the product is tested on a 254 x 254 mm, 35 m (1 oz), 16-layer test board mounted vertically in a wind tunnel with a cross-section of 305 x 305 mm. proper cooling of the dc/dc converter can be verified by measuring the temperature at positions p1, p2, p3, p4 and p5. the temperature at these positions should not exceed the max values provided in the table below. the number of points may vary with different thermal design and topology. see design note 019 for detailed information. position description max value p1 reference point ( t ref ) 125 oc p2 transistor 125 oc p3 optocoupler 100 oc p5 reference point ( t ref ) 125 oc p6 transistor 125 oc p7 base plate 105 oc open frame base plate e pkb 4000b pi intermediate bus converters, input 36-75 v, 40 a / 240 w en/lzt 146 384 r2a dec 2008 ? ericsson power modules ab technical specifcation 13
ericsson internal product specification 4 (5) prepared (also subject responsible if other) no. eab/fjb/gkj tord johan sson 3/1301-bmr 658 uen approved checked date rev reference eab/fjb/gkg (magnus broman) (micmros) 2008-06-03 a connections pin designation function 1 +in positive input 2 rc remote control 3 -in negative input 4 -out negative output 5 +out positive output e pkb 4000b pi intermediate bus converters, input 36-75 v, 40 a / 240 w en/lzt 146 384 r2a dec 2008 ? ericsson power modules ab technical specifcation 14
ericsson confidential product spec. mechanical 1 (4) prepared (also subject responsible if other) no. exxuyng 4/1301-bmr 658 uen approved checked date rev reference sec/d (betty wu) see 1 2008-11-27 c mechanical information - hole mount, open frame version e pkb 4000b pi intermediate bus converters, input 36-75 v, 40 a / 240 w en/lzt 146 384 r2a dec 2008 ? ericsson power modules ab technical specifcation 15
ericsson confidential product spec. mechanical 2 (4) prepared (also subject responsible if other) no. exxuyng 4/1301-bmr 658 uen approved checked date rev reference sec/d (betty wu) see 1 2008-11-27 c mechanical information - hole mount, base plate version e pkb 4000b pi intermediate bus converters, input 36-75 v, 40 a / 240 w en/lzt 146 384 r2a dec 2008 ? ericsson power modules ab technical specifcation 16
ericsson confidential product spec. mechanical 3 (4) prepared (also subject responsible if other) no. exxuyng 4/1301-bmr 658 uen approved checked date rev reference sec/d (betty wu) see 1 2008-11-27 c mechanical information - surface mount version e pkb 4000b pi intermediate bus converters, input 36-75 v, 40 a / 240 w en/lzt 146 384 r2a dec 2008 ? ericsson power modules ab technical specifcation 17
ericsson confidential product spec. 1 (4) prepared (also subject responsible if other) no. exxuyng 5/1301- bmr 658 uen approved checked date rev reference sec/d (betty wu) see 1 2008-11-27 b soldering information - surface mounting the surface mount product is intended for forced convection or vapor phase reflow soldering in snpb and pb-free processes. the reflow profile should be optimised to avoid excessive heating of the product. it is recommended to have a sufficiently extended preheat time to ensure an even temperature across the host pcb and it is also recommended to minimize the time in reflow. a no-clean flux is recommended to avoid entrapment of cleaning fluids in cavities inside the product or between the product and the host board, since cleaning residues may affect long time reliability and isolation voltage. minimum pin temperature recommendations pin number 4 is chosen as reference location for the minimum pin temperature recommendation since this will likely be the coolest solder joint during the reflow process. snpb solder processes for snpb solder processes, a pin temperature (t pin ) in excess of the solder melting temperature, (t l , 183c for sn63pb37) for more than 30 seconds and a peak temperature of 210c is recommended to ensure a reliable solder joint. for dry packed products only: depending on the type of solder paste and flux system used on the host board, up to a recommended maximum temperature of 245c could be used, if the products are kept in a controlled environment (dr y pack handling and storage) prior to assembly. general reflow process specifications snpb eutectic pb-free average ramp-up (t product ) 3c/s max 3c/s max typical solder melting (liquidus) temperature t l 183c 221c minimum reflow time above t l 30 s 30 s minimum pin temperature t pin 210c 235c peak product temperature t product 225c 260c average ramp-down (t product ) 6c/s max 6c/s max maximum time 25c to peak 6 minutes 8 minutes t product maximum t pin minimum time pin profile product profile t l time in reflow time in preheat / soak zone time 25c to peak temperature lead-free (pb-free) solder processes for pb-free solder processes, a pin temperature (t pin ) in excess of the solder melting temperature (t l , 217 to 221c for snagcu solder alloys) for more than 30 seconds and a peak temperature of 235c on all solder joints is recommended to ensure a reliable solder joint. maximum product tempera ture requirements top of the product pcb near pin 2 is chosen as reference location for the maximum (pea k) allowed product temperature (t product ) since this will likely be the warmest part of the product during the reflow process. snpb solder processes for snpb solder processes, the product is qualified for msl 1 according to ipc/jedec standard j-std-020c. during reflow t product must not exceed 225 c at any time. pb-free solder processes for pb-free solder processes, the product is qualified for msl 3 according to ipc/jedec standard j-std-020c. during reflow t product must not exceed 260 c at any time. dry pack information products intended for pb-free reflow soldering processes are delivered in standard moisture barrier bags according to ipc/jedec standard j-std-033 (handlin g , packin g , shippin g and use of moisture/reflow sensitivit y surface mount devices). using products in high temperature pb-free soldering processes requires dry pack storage and handling. in case the products have been stored in an uncontrolled environment and no longer can be considered dry, the modules must be baked ac cording to j-std-033. thermocouple attachment pin 4 for measur ement of minimum pin (solder j oint) temperature, t pin top of pcb near pin 2 for measurement of maximum product temperature, t product e pkb 4000b pi intermediate bus converters, input 36-75 v, 40 a / 240 w en/lzt 146 384 r2a dec 2008 ? ericsson power modules ab technical specifcation 18
ericsson confidential product spec. 2 (4) prepared (also subject responsible if other) no. exxuyng 5/1301- bmr 658 uen approved checked date rev reference sec/d (betty wu) see 1 2008-11-27 b soldering information - hole mounting the hole mounted product is intended for plated throu g h hole mounting by wave or manual soldering. the pin temperature is specified to maximum to 270c for maximum 10 seconds. a maximum preheat rate of 4c/s and maximum preheat temperature of 150c is suggested. when soldering by hand, care should be taken to avoid direct contact between the hot soldering iron tip and the pins for more than a few seconds in order to prevent overheating. a no-clean flux is recommended to avoid entrapment of cleaning fluids in cavities inside the product or between the product and the host board. the cleanin g residues ma y affect long time reliability and isolation voltage. delivery package information surface mount version the products are delivered in antistatic injection molded tra y s (jedec design guide 4.10d standard). tray specifications material antistatic ppe surface resistance 10 5 < ohm/square < 10 12 bakability the trays can be baked at maximum 125c for 48 hours tray thickness 17.4 mm [0.685 inch] box capacity 100 products (5 full trays/box) tray weight 120 g empty, 640 g full tray delivery package information hole mount, open frame version hole mount, base plate version the products are delivered in antistatic trays. tray specifications material pe foam surface resistance 10 5 < ohm/square < 10 12 bakability the trays are not bakeable tray thickness 22 mm [0.87 inch] box capacity 75 products (3 full trays/box) tray weight open frame version 40 g empty, 690 g full tray base plate version 40 g empty, 1165 g full tray e pkb 4000b pi intermediate bus converters, input 36-75 v, 40 a / 240 w en/lzt 146 384 r2a dec 2008 ? ericsson power modules ab technical specifcation 19
ericsson confidential product spec. 3 (4) prepared (also subject responsible if other) no. exxuyng 5/1301- bmr 658 uen approved checked date rev reference sec/d (betty wu) see 1 2008-11-27 b product qualification specification characteristics external visual inspection ipc-a-610 change of temperature (temperature cycling) iec 60068-2-14 na temperature range number of cycles dwell/transfer time -40 to 100c 1000 15 min/0-1 min cold (in operation) iec 60068-2-1 ad temperature t a duration -45c 72 h damp heat iec 60068-2-67 c y temperature humidity duration 85c 85 % rh 1000 hours dry heat iec 60068-2-2 bd temperature duration 125c 1000 h electrostatic discharge susceptibility iec 61340-3-1, jesd 22-a114 iec 61340-3-2, jesd 22-a115 human body model (hbm) machine model (mm) class 2, 2000 v class 3, 200 v immersion in cleaning solven ts iec 60068-2-45 xa, method 2 water glycol ether isopropyl alcohol 55c 35c 35c mechanical shock iec 60068-2-27 e a peak acceleration duration 100 g 6 ms moisture reflow sensitivity 1 j-std-020c level 1 (snpb-eutectic) level 3 (pb free) 225c 260c operational life test mil-std-202g, method 108a duration 1000 h resistance to soldering heat 2 iec 60068-2-20 tb, method 1a solder temperature duration 270c 10-13 s robustness of terminations iec 60068-2-21 test ua1 iec 60068-2-21 test ue1 through hole mount products surface mount products all leads all leads solderability iec 60068-2-58 test td 1 iec 60068-2-20 test ta 2 preconditioning temperature, snpb eutectic temperature, pb-free preconditioning temperature, snpb eutectic temperature, pb-free 150c dry bake 16 h 215c 235c steam ageing 235c 245c vibration, broad band random iec 60068-2-64 fh, method 1 frequency spectral density duration 10 to 500 hz 0.07 g 2 /hz 10 min in each direction notes 1 only for products intended for refl ow soldering (surface mount products) 2 only for products intended for wave soldering (plated through hole products) e pkb 4000b pi intermediate bus converters, input 36-75 v, 40 a / 240 w en/lzt 146 384 r2a dec 2008 ? ericsson power modules ab technical specifcation 20

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