dc/dc power module 5v / 3a / 15w the macrodens? 15w pkf 4211a i true component level on-board dc/dc power modules are intended as distributed power sources in decentralized ? 48 and ? 60v dc power systems. they are optimized for an operational ambient temperature range in compliance with present and future application needs, including non temperature controlled environments. ? smd and through-hole versions with ultra low component height 8.0 mm (0.315 in.) ? 81% efficiency at full load ? 1,500 v dc isolation voltage ? switching frequency synchronization ? mttf >10 million hours at +50c case temperature ? low emi pkf 4211a i e the mechanical design offers the choice of surface mount or through-hole versions, delivered in ready- to-use tubes, trays or tape & reel package, and compatibility with semi and fully aqueous cleaning processes. for mechanical and other information please refer to the pkf series general information data sheet.
2 en/lzt 146 79 r1b ? ericsson power modules ab, march 2004 notes: 1) the input voltage range 36?75 v dc meets the european telecom standard prets 300 132-2 nominal input voltage range in 48 v and 60 v dc power systems, ? 40.5? ?57.0 v and ?50.0? ? 72.0 v respectively. absolute max continuous input voltage is 80 v dc. 2) the power modules will operate down to 35v, when v i decreases, but will turn on at v i 36v, when v i increases (see also operating information). input t c 3 en/lzt 146 79 r1b ? ericsson power modules ab, march 2004 safety the pkf 4211a i dc/dc power module is designed in accordance with en 60 950, safety of information technology equipment including electrical business equipment . the pkf power modules are recognized by ul and meet the applicable requirements in ul 1950 safety of information technology equipment , the applicable canadian safety requirements and ul 1012 standard for power supplies . the dc/dc power module shall be installed in an end-use equip- ment and considerations should be given to measuring the case temperature to comply with t c max when in operation. abnormal component tests are conducted with the input protected by an external 15 a fuse. the need for repeating these tests in the end- use appliance shall be considered if installed in a circuit having higher rated devices. when the supply to the dc/dc power module meets all the re- quirements for selv (<60vdc), the output is considered to remain within selv limits (level 3). the isolation is an operational insula- tion in accordance with en 60 950. the dc/dc power module is intended to be supplied by isolated secondary circuitry and shall be installed in compliance with the requirements of the ultimate application. if they are connected to a 60 v dc system reinforced insulation must be provided in the power supply that isolates the input from the mains. single fault testing in the power supply must be performed in combination with the dc/dc power module to demonstrate that the output meets the requirement for selv. one pole of the input and one pole of the output is to be grounded or both are to be kept float- ing. the terminal pins are only intended for connection to mating connectors of internal wiring inside the end-use equipment. these dc/dc power modules may be used in telephone equipment in accordance with paragraph 34 a.1 of ul 1459 (standard for telephone equipment, second edition). the galvanic isolation is verified in an electric strength test. test voltage (v iso ) between input and output is 1,500 vdc for 60 s. in production the test duration may be decreased to 1 s. the capacitor between input and output has a value of 1 nf and the leakage current is less than 1a @ 53 vdc. the case is designed in non-conductive epoxy. its flammability rating meets ul 94v-0. the oxygen index is 34%. transient input voltage single voltage pulse at +25c ambient temperature. electrical data fundamental circuit diagram, single output
4 en/lzt 146 79 r1b ? ericsson power modules ab, march 2004 t c = ?30?+95 c, v i = 36 ...75 v and pin 8 connected to pin 9. output 3 characteristics conditions unit min typ max p d power dissipation miscellaneous % efficiency i o = 3 a 78 81 v i = 53 v v i = 66 v v i = 53 v v i = 66 v 78 81 3 w 0 3.0 a characteristics conditions output 1 min typ max unit output voltage initial setting and accuracy v oi output voltage tolerance band v o idling voltage i o = 0 a load regulation i o = 0.3?3 a, v i = 53 v t tr load transient voltage v tr temperature coefficient 2) t coeff t r start-up time t s i o max output power 2) p o max current limiting threshold i lim t c 5 en/lzt 146 79 r1b ? ericsson power modules ab, march 2004 typical characteristics output characteristic (typ) power derating temperature coefficient turn-on/turn-off input voltage efficiency (typ) @ t a = +25c 1.0 1.25 1.50 1.75 2.00 2.25 2.50 2.5 3 .0 72 74 76 78 80 82 84 75v 36v load current (a) efficiency (%) 0 5 10 15 20 -50 -40 -30 +80 +90 +100 +110 +120 case temperature (?c) max output power (w) 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.8 4.9 5,0 5.1 5.2 5.3 5.4 output voltage (v) load current (a) -30 -14.3 1.2 16.8 32.5 48.1 64.7 79.8 9 5 30 31 32 34 35 36 38 case temperature (c) turn on turn off turn-on/tur-off voltage dynamic load response (typ) @ +25c 4.85 4.91 4.98 5.05 5.11 5.18 5.25 output voltage (v) case temperature ?(c) -30 -14.3 1.2 16.8 32.5 48.1 64.7 79.8 9 5 emc specifications during emc measurements the pkf power module is measured directly. the fundamental switching frequency is 510 khz 5% at i o = 0.3?3a test conditions: v i = 53 v, i o = 3a at room temperature conducted emi (input teminals) external filter (class b) required external input filter in order to meet class b in en 55022, cispr 22 and fcc part 15j. i o step= 1.5-3-1.5a pkf 4211a without filter l1 = 51h ( recommended part: siemens b82790-s0513 ) l2 = 10h c1, c2, c3 = 0.68 f c4 = 22f c5, c6 = 10nf + - supply voltage l1 c2 c3 c6 c5 c4 c1 l2 pin 18 pin 17 0.2 ms/div the output voltage deviation is determined by the load transient (di/ dt) load change: di/dt 4a/ s 200 mv/div 2 a/div
6 en/lzt 146 79 r1b ? ericsson power modules ab, march 2004 turn-on/off input voltage the power module monitors the input voltage and will turn on and turn off at predetermined levels set by means of external resis- tors. to increase v ion a resistor should be connected between pin 11 and 17 (see fig. 2). the resistance is given by the following equation: for v i >34.5v, r iu nom =(2655-v i )/(v i -34.5) k v i is the desired turn-on input voltage. the values are nominal and apply when the unadjusted module turns on at 34.5v. to decrease v ion a resistor should be connected between pin 10 and 11 (see fig. 2). the resistance is given by the following equa- tion: for 30.5 7 en/lzt 146 79 r1b ? ericsson power modules ab, march 2004 output voltage adjust (v adj ) output voltage, v o , can be adjusted by using an external resistor or other external circuitry. if other circuitry is used, the slew rate has to be limited to maximum 5 v/ms. if pins 8 and 9 are not connected together the output will decrease to a low value. to increase v o a resistor should be connected between pin 8/9 and 17, and to decrease v o a resistor should be connected between pin 8 and 9 (see fig. 3). to increase output voltage: r ou nom =4.20(6.35-v o )/(v o -v i ) k v i is the initial output voltage when pin 8 and 9 are connected, v o is the desired output voltage. to decrease output voltage: r od nom =18(v i -v o )/(v o -2.7) k v i is the initial output voltage when pin 8 and 9 are connected, v o is the desired output voltage. figure 2 figure 3 current limiting protection (i lim ) the output power is limited at loads above the output current limiting threshold (i lim ), specified as a minimum value. capacitive load the pkf series has no maximum limit for capacitive load on the output. the power module may operate in current limiting mode during start-up, affecting the ramp-up and the start-up time. for optimum start performance we recommend maximum 100 f/a of i o . connect capacitors at the point of load for best performance. input and output impedance both the source impedance of the power feeding and the load impedance will interact with the impedance of the dc/dc power module. it is most important to have the ratio between l and c as low as possible, i.e. a low characteristic impedance, both at the input and output, as the power modules have a low energy storage capability. use an electrolytic capacitor across the input if the source induct- ance is higher than 10 h. their equivalent series resistance to- gether with the capacitance acts as a lossless damping filter. suita- ble capacitor values are in the range 10?100 f. synchronization (sync) it is possible to synchronize the switching frequency to an exter- nal symmetrical clock signal. the input can be driven by an ttl- compatible output and referenced to the input pin 17. parallel operation paralleling of several converters is easily accomplished by direct connection of the output voltage terminal pins. the load regula- tion characteristic is specifically designed for optimum paralleling performance. load sharing between converters will be within 10%. it is recommended not to exceed p o = n 0.9 p o max , where p o max is the maximum converter output power and n the number of paralleled converters, to prevent overloading any of the converters and thereby decreasing the reliability performance. *) rise time <10ns characteristics min typ max unit high level 2.2 6.5 v threshold level *) 1.2 1.7 2.2 v low level 0 0.4 v sink current 1.5 ma sync. frequency 520 688 khz order info surface mount pkf 4211a si through hole pkf 4211a pi version part no. information given in this data sheet is believed to be accurate and reliable. no responsibility is assumed for the consequences of its use nor for any infringement of patents or other rights of third parties which may result from its use. no license is granted by implication or otherwise under any patent or patent rights of ericsson power modules. these products are sold only according to ericsson power modules? general conditions of sale, unless otherwise confirmed in writing. specifications subject to change without notice.
en/lzt 146 79 r1b ? ericsson power modules ab, march 2004 datasheet ericsson power modules se-141 75 kungens kurva, sweden telephone: +46 8 568 69620 for local sales contacts, please refer to our website www.ericsson.com/powermodules or call: int +46 8 568 69620, fax: +46 8 568 69599 americas ericsson inc., power modules +1-972 583 5254, +1-972 583 6910 americas asia/pacific ericsson ltd. +852-2590-2433
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