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50 w dc / dc power module 48 v input series ? regulated single and dual outputs efficiency >90% (3.3v) from 30% to full load low profile 8.5 mm (0.335 in.) 1,500 vdc isolation voltage mtbf >200 years at +75c case temperature full power up to +80c ambient at 1 m/s airflow complete, no extra filters or heatsinks required the pkn 4000 i series of dc/dc power modules are intended to be used as distributed power sources in decentralized 48/60 v dc power systems. the pkn series use a ceramic substrate with thickfilm technolo- gy and a high degree of silicon integration. that to- gether with the electrical design using synchronous rectification gives good thermal management, high reliability and high efficiency. the high efficiency, makes it possible to operate over a wide temperature range without a heatsink. at forced convection cooling >200 lfm (1 m/s), the pkn units can deliver full pkn 4000 i power up to +80c ambient temperature. the high reliability and the low profile of the pkn series makes them particularly suited for information technology and telecom (it&t) applications with board spacing down to 15 mm (0.6 in.). these products are manufactured using highly automated manufacturing lines with a world-class quality commitment and a five-year warranty. ericsson microelectronics ab has been an iso 9001 certified supplier since 1991. for a complete product program please reference the back cover.
2 en/lzt 146 27 r4a ? ericsson microelectronics, february 2002 general safety the pkn 4000 i series dc/dc power modules are designed in accordance with en 60 950 safety of information technology equipment including electrical business equipment , and certified by semko. the isolation is an operational insulation in accordance with en 60 950. the pkn dc/dc power modules are re- cognized by ul and meet the applicable requirements in ul 1950 safety of informa- tion 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 equipment and is intended to be supplied by isolated secondary circuitry and shall be installed in compliance with the requirements of the ultimate application. when the supply 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 connected to a 60 v dc power system reinforced insulation must be provided in the power supply that isolates the input from the ac 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 floating. 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 isolation voltage is a galvanic isolation and is verified in an electric strength test. test voltage between input and output is 1500 v dc for 60 s. in production the test duration may be decreased to 1 s. the capacitor between input and output has a value of 4.7 nf and the leakage current is less than 1 a @ 50 vdc. flammability ratings of the terminal support and internal plastic construction details meets ul 94v-0. absolute maximum ratings 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 stress above these limits, function and performance may degrade in an unspecified manner. characteristics min max unit t c case temperature @ max output power ? 45 +100 c t s storage temperature ? 55 +125 c v i input voltage ? 0.5 +80 v dc v lo local on/off voltage pin 1 ? 0.5 + 80 vdc v rc remote control voltage 0 6 v note: the input voltage range 36...75 v meets the requirements in the european telecom standard prets 300 132-2 for normal input voltage range in 48 v and 60 v dc power systems, C 40.5...C57.0 v and C50.0...C72.0 v respectively. 1) v iso 1500 v dc isolation voltage (input to output test voltage) v ro remote on/off voltage pin 2 ? 0.5 + 80 vdc input t c < t c max characteristics conditions min typ max unit v i input voltage range 1) 36 75 v v i off turn-off input voltage (see operating information) 32 v v ion turn-on input voltage (see operating information) 34 v c i input capacitance 4 f i o =0,v i = 53 v 1.3 w equivalent inrush current resistance m r i rush input idling power p ii input stand-by power v i = 53 v, lo/ro to pin 6 p ist-by w 150 0.25 v adj output adjust voltage pin 17 ? 0.5 2v oi vdc characteristics frequency 10?500 hz amplitude 0.75 mm acceleration 10 g number of cycles 10 in each axis vibration (sinusoidal) iec 68-2-6 f c test procedure & conditions environmental characteristics peak acceleration 200 g shock duration 3 ms shock (half sinus) iec 68-2-27 e a temperature ?40c? +125c number of cycles 300 temperature change iec 68-2-14 n a temperature, solder 260c duration 10?13 s accelerated damp heat solder resistability iec 68-2-3 c a with bias iec 68-2-20 t b 1a temperature 85c humidity 85% rh duration 1000 hours water +55 5c isopropyl alcohol +35 5c terpens +35 5c method with rubbing resistance to cleaning solvents iec 68-2-45 xa method 1
3 en/lzt 146 27 r4a ? ericsson microelectronics, february 2002 mechanical data dimensions in mm (in) case plastic coated aluminum casing with tin plated brass pins. weight maximum 40 g (1.40 oz) for pkn single and maximum 45 g (1.58 oz) for pkn dual. connections pin designation function 1 lo local on/off. turns the module off immediately after lo pin is connected to positive input pin. 2 ro remote on/off. turns the module off approx. 1.5 sec. after ro pin is connected to positive input pin. 3 r alarm reset. resets the alarm and turns on the module when connected to the negative input pin. 4 p alarm. alarm pin p goes high when active. 5 q alarm battery pin. (connected to positive input pin.) 6 ? in negative input pin. 7 +in positive input pin. (input ground.) 8 no pin 9 ? out negative output pin. 10 ? out negative output pin. 11 ? out negative output pin. 12 no pin 13 no pin 14 + out positive output pin. 15 + out positive output pin. 16 + out positive output pin. 17 v adj output voltage adjust. pin designation function 1 lo local on/off. turns the module off immediately after lo pin is connected to positive input pin 2 rc remote control. turns the module off immediately after rc pin is connected to negative input pin 3 nc not connected 4 nc not connected 5 nc not connected 6 ? in negative input 7 + in positive input 8 no pin 9v adj out 2 output 2 voltage adjust 10 + out 2 output 2 11 + out 2 output 2 12 rtn return 13 rtn return 14 rtn return 15 + out 1 output 1 16 + out 1 output 1 17 v adj out 1 output 1 voltage adjust single output dual output connections
4 en/lzt 146 27 r4a ? ericsson microelectronics, february 2002 fundamental circuit diagram electrical data single output control control isolated feedback 14 15 16 9 10 11 17 7 1 2 3 4 5 6 dual output 7 1 2 6 9 10 11 12 13 14 15 16 17 control ic control ic control ic isolated feedback
5 en/lzt 146 27 r4a ? ericsson microelectronics, february 2002 020a pkn 4318 pioa characteristics conditions output 1 min typ max unit output voltage initial setting and accuracy t c = +25c, i o = 20 a, v i = 53 v v oi output voltage tolerance band v o idling voltage i o =0 a load regulation i o = 0.01 ?1.0 i o max , v i = 53 v t tr load transient voltage v tr ramp-up time t r start-up time t s 0.1 ?0.9 v o from v i connection to v o = 0.9 v oi output current i o max output power 2) p o max current limiting threshold i lim t c 6 en/lzt 146 27 r4a ? ericsson microelectronics, february 2002 characteristics conditions unit min typ max efficiency power dissipation p d miscellaneous 87 88.5 % 5.4 w i o = i o max , v i = 53 v, t c = + 25 c i o = i o max , v i = 53 v, t c = + 25 c 020a pkn 4318 pi characteristics conditions output 1 min typ max unit output voltage initial setting and accuracy t c = +25c, i o = 20 a, v i = 53 v v oi output voltage tolerance band v o idling voltage i o =0 a load regulation i o = 0.01?1.0 i o max , v i = 53 v t tr load transient voltage v tr ramp-up time t r start-up time t s 0.1?0.9 v o from v i connection to v o = 0.9 v oi output current i o max output power 2) p o max current limiting threshold i lim t c 7 en/lzt 146 27 r4a ? ericsson microelectronics, february 2002 017a pkn 4419 pi characteristics conditions output 1 min typ max unit output voltage initial setting and accuracy t c = +25c, i o = 17 a, v i = 53 v v oi output voltage tolerance band v o idling voltage i o =0 a load regulation i o = 0.01?1.0 i o max , v i = 53 v t tr load transient voltage v tr ramp-up time t r start-up time t s 0.1?0.9 v o from v i connection to v o = 0.9 v oi output current i o max output power 2) p o max current limiting threshold i lim t c 8 en/lzt 146 27 r4a ? ericsson microelectronics, february 2002 015a pkn 4510 pi characteristics cond itions output 1 min typ max unit output voltage initial setting and accuracy t c = +25c, i o = 15 a, v i = 53 v v oi output voltage tolerance band v o idling voltage i o =0 a load regulation i o = 0.01?1.0 i o max , v i = 53 v t tr load transient voltage v tr ramp-up time t r start-up time t s 0.1?0.9 v o from v i connection to v o = 0.9 v oi output current i o max output power 2) p o max current limiting threshold i lim t c 9 en/lzt 146 27 r4a ? ericsson microelectronics, february 2002 010a pkn 4511 pi characteristics conditions output 1 min typ max unit output voltage initial setting and accuracy t c = +25c, i o = 10 a, v i = 53 v v oi output voltage tolerance band v o idling voltage i o =0 a load regulation i o = 0.01 ?1.0 i o max , v i = 53 v t tr load transient voltage v tr ramp-up time t r start-up time t s 0.1 ?0.9 v o from v i connection to v o = 0.9 v oi output current i o max output power 2) p o max current limiting threshold i lim t c 10 en/lzt 146 27 r4a ? ericsson microelectronics, february 2002 0150 6a pkn 4520 api characteristics cond itions output 1 min unit output voltage initial setting and accuracy t c = +25c, i o =i o nom , v i = 53 v v oi output voltage tolerance band v o idling voltage i o = 0 a load regulation i o1 = i o1 nom , v i = 53 v i o2 = 0.01 ?1.0 i o2 nom t tr load transient voltage v tr ramp-up time t r start-up time t s v o = 0.1 ?0.9 v o from v i connection to v o = 0.9 v oi output current i o max output power 2) p o max calculated value current limiting threshold 1) i lim t c 11 en/lzt 146 27 r4a ? ericsson microelectronics, february 2002 0150 8a pkn 4520 bpi characteristics cond itions output 1 min unit output voltage initial setting and accuracy t c = +25c, i o =i o nom , v i = 53 v v oi output voltage tolerance band v o idling voltage i o = 0 a load regulation i o1 = i o1 nom , v i = 53 v i o2 = 0.01?1.0 i o2 nom t tr load transient voltage v tr ramp-up time t r start-up time t s v o = 0.1 ?0.9 v o from v i connection to v o = 0.9 v oi output current i o max output power 2) p o max calculated value current limiting threshold 1) i lim t c 12 en/lzt 146 27 r4a ? ericsson microelectronics, february 2002 0150 8a pkn 4520 bpioa characteristics cond itions output 1 min unit output voltage initial setting and accuracy t c = +25c, i o =i o nom , v i = 53 v v oi output voltage tolerance band v o idling voltage i o = 0 a load regulation i o1 = i o1 nom , v i = 53 v i o2 = 0.01 ?1.0 i o2 nom t tr load transient voltage v tr ramp-up time t r start-up time t s v o = 0.1?0.9 v o from v i connection to v o = 0.9 v oi output current i o max output power 2) p o max calculated value current limiting threshold 1) i lim t c 13 en/lzt 146 27 r4a ? ericsson microelectronics, february 2002 0150 8a pkn 4520 bpioc characteristics cond itions output 1 min unit output voltage initial setting and accuracy t c = +25c, i o =i o nom , v i = 53 v v oi output voltage tolerance band v o idling voltage i o = 0 a load regulation i o1 = i o1 nom , v i = 53 v i o2 = 0.01 ?1.0 i o2 nom t tr load transient voltage v tr ramp-up time t r start-up time t s v o = 0.1?0.9 v o from v i connection to v o = 0.9 v oi output current i o max output power 2) p o max calculated value current limiting threshold 1) i lim t c 14 en/lzt 146 27 r4a ? ericsson microelectronics, february 2002 typical characteristics pkn 4318 pioa pkn 4318 pi 4 6 8 10 12 14 16 18 2 0 70 75 80 85 90 95 100 load current (a) efficiency (%) 36 v 75 v 1.60 1.65 1.70 1.75 1.80 1.85 1.90 output voltage (v) load current (a) 0369121518212 4 efficiency (typ) output characteristic (typ) power derating 4 6 8 10 12 14 16 18 20 70 75 80 85 90 95 100 load current (a) efficiency (%) 36 v 75 v 03691215182124 1.30 1.35 1.40 1.45 1.50 1.55 1.60 output voltage (v) load current (a) efficiency (typ) output characteristic (typ) power derating max output power (w) case temperature (?c) 20 60 40 80 0 +100 +110 +120 +80 +90 -30 -40 -50 dynamic load response (typ) dynamic load response (typ) max output power (w) case temperature ( c) 20 60 40 80 0 +100 +110 +12 0 +80 +90 -30 -40 -50 a. the output voltage deviation is determined by the load transient (di/dt) b. load change: 0.25i o nom ?0.75i o nom ?0.25i o nom di/dt 5a/ s a. the output voltage deviation is determined by the load transient (di/dt) b. load change: 0.25i o nom ?0.75i o nom ?0.25i o nom di/dt 5a/ s v o1 v o2 v o1 v o2
15 en/lzt 146 27 r4a ? ericsson microelectronics, february 2002 pkn 4419 pi typical characteristics 35791113151719 70 75 80 85 90 95 100 load current (a) efficiency (%) 36 v 75 v 0 2.5 5.0 7.5 10.0 12.5 15.0 17.5 2 0 2.30 2.35 2.40 2.45 2.50 2.55 2.60 output voltage (v) load current (a) efficiency (typ) output characteristic (typ) dynamic load response (typ) power derating a. the output voltage deviation is determined by the load transient (di/dt) b. load change: 0.25i o nom ?0.75i o nom ?0.25i o nom di/dt 5a/ s max output power (w) case temperature ( c) 20 60 40 80 0 +100 +110 +12 0 +80 +90 -30 -40 -50 3.0 4.5 6.0 7.5 9.0 10.5 12.0 13.5 15.0 70 75 80 85 90 95 100 load current (a) efficiency (%) 36 v 75 v 0 2.5 5.0 7.5 10.0 12.5 15.0 17.5 2 0 output voltage (v) load current (a) 3.10 3.15 3.20 3.25 3.30 3.35 3.40 efficiency (typ) output characteristic (typ) power derating dynamic load response (typ) pkn 4510 pi a. the output voltage deviation is determined by the load transient (di/dt) b. load change: 0.25i o nom ?0.75i o nom ?0.25i o nom di/dt 5a/ s max output power (w) case temperature ( c) 20 60 40 80 0 +100 +110 +120 +80 +90 -30 -40 -50 v o1 v o2 v o1 v o2
16 en/lzt 146 27 r4a ? ericsson microelectronics, february 2002 pkn 4511 pi 0 1.5 3.0 4.5 6.0 7.5 9.0 10.5 12 4.85 4.95 5.05 5.15 5.25 5.35 5.45 output voltage (v) load current (a) output characteristic (typ) dynamic load response (typ) efficiency (typ) 234567891 0 70 75 80 85 90 95 100 efficiency (%) 36 v 75 v load current (a) typical characteristics a. the output voltage deviation is determined by the load transient (di/dt) b. load change: 0.25i o nom ?0.75i o nom ?0.25i o nom di/dt 5a/ s max output power (w) case temperature (?c) 20 60 40 80 0 +100 +110 +120 +80 +90 -30 -40 -50 power derating pkn 4520 api efficiency (typ) output characteristic (typ) dynamic load response (typ) a, c. the output voltage deviation is determined by the load transient (di/dt) b, d. load change: 0.25i o nom ?0.75i o nom ?0.25 i o nom, di/dt 5a/ s start up (typ) 2345678910 70 75 80 85 90 95 100 efficiency (%) 36 v 75 v load current (a) i o2 = i o2 nom power derating max output power (w) case temperature (?c) 20 60 40 80 0 +100 +110 +120 +80 +90 -30 -40 -50 v o1 v o2 v o1 v o2 v o1 v o2 3.4 3.3 3.2 3.1 4.5 9.0 12 2.4 2.3 2.5 2.6 v o1 v o2 3.0 0 1.5 6.0 7.5 10.5 output voltage (v) v o1 (v) load current (a) i o2 = i o2 nom output voltage (v) v o2 (v)
17 en/lzt 146 27 r4a ? ericsson microelectronics, february 2002 typical characteristics pkn 4520 bpioa efficiency (typ) output characteristic (typ) power derating dynamic load response (typ) a,c.the output voltage deviation is determined by the load transient (di/dt) b,d.load change: 0.25i o nom ?0.75i o nom ?0.25 i o nom di/dt 5a/ s max output power (w) case temperature (?c) 20 60 40 80 0 +100 +110 +120 +80 +90 -30 -40 -50 start up (typ) v o1 v o2 output voltage (v) v o1 (v) load current (a) i o2 = i o2 nom output voltage (v) v o2 (v) v o1 v o2 0246810121416 3.10 3.15 3.20 3.25 3.30 3.35 3.40 1.30 1.35 1.40 1.45 1.50 1.55 1.60 2345678910 70 75 80 85 90 95 100 efficiency (%) 36v 53v 75v load current (a) i o2 = i o2 nom pkn 4520 bpi 2345678910 70 75 80 85 90 95 100 efficiency (%) 36 v 75 v load current (a) i o2 = i o2 nom 0246810121416 3.10 3.15 3.20 3.25 3.30 3.35 3.40 v o1 v o2 1.60 1.65 1.70 1.75 1.80 1.85 1.90 output voltage (v) v o1 (v) load current (a) i o2 = i o2 nom output voltage (v) v o2 (v) efficiency (typ) output characteristic (typ) start up (typ) dynamic load response (typ) a, c. the output voltage deviation is determined by the load transient (di/dt) b,d. load change: 0.25i o nom ?0.75i o nom ?0.25 i o nom, di/dt 5a/ s max output power (w) case temperature (?c) 20 60 40 80 0 +100 +110 +120 +80 +90 -30 -40 -50 power derating v o1 v o2 v o1 v o2 v o1 v o2
18 en/lzt 146 27 r4a ? ericsson microelectronics, february 2002 pkn 4520 bpioc efficiency (typ) output characteristic (typ) dynamic load response (typ) a, c. the output voltage deviation is determined by the load transient (di/dt) b,d. load change: 0.25i o nom ?0.75i o nom ?0.25 i o nom, di/dt 5a/ s start up (typ) v o1 v o2 max output power (w) case temperature (?c) 20 60 40 80 0 +100 +110 +120 +80 +90 -30 -40 -50 power derating v o1 v o2 efficiency (%) 2345678910 70 75 80 85 90 95 100 53v 75v 36v load current (a) i o2 = i o2 nom v o1 v o2 1.10 1.15 1.20 1.25 1.30 1.35 1.40 0 2 4 6 8 10121416 3.10 3.15 3.20 3.25 3.30 3.35 3.40 output voltage (v) v o1 (v) load current (a) i o2 = i o2 nom output voltage (v) v o2 (v)
19 en/lzt 146 27 r4a ? ericsson microelectronics, february 2002 emc specifications the conducted emi measurement was performed using a module placed directly on the test bench. the fundamental switching frequency for pkn single output is 160 khz 5% at v i = 53 v, i o = (0.1...1.0) i o max . for pkn dual it is 160 khz 5% on output 1 and 320 khz 5% on output 2. test set-up according to cispr publ. 1a. radiated ems (electro-magnetic fields) radiated ems is measured according to test methods in en/iec standard 61000- 4-3. no deviation outside the v o tolerance band will occur under the following conditions: frequency range voltage level 0.08...1,000 mhz 3 v rms /m eft electrical fast transients on the input terminals may cause output deviations outside what is tolerated by the electronic circuits, i.e. 5%. the pkn power module can withstand eft levels of 0.5 kv keeping v o within the tolerance band and 2.0 kv without destruction. tested according to en/iec standard 61000-4-4. output ripple & noise (v o ac) output ripple is measured as the peak to peak voltage of the fundamental switching frequency. external filter (class b) required external input filter in order to meet class b in en 55022, cispr 22 and fcc part 15j. the capacitors are of ceramic type. the low esr is critical for the result. conducted emi pkn 4510 pi input terminal value (typ)
20 en/lzt 146 27 r4a ? ericsson microelectronics, february 2002 to start the converter the output uvd function is blocked for typically 100 ms after the input voltage is applied or the reset pin (r) is activated. if the output voltage of the converter does not reach over the uvd threshold within 100 ms, the converter will turn off. the rise time of the input voltage from 0v to 35v must not exceed 100 ms if the converter is to be started by turning on the primary voltage source. turn-off input voltage the pkn power module monitors the input voltage and will turn on and turn off at predetermined levels. the minimum hysteresis between turn on and turn off input voltage is 1v where the turn on input voltage is the highest. load the pkn series of converters has no limitation of maximum connected capacitance on the output. this is true as long as the output voltage reach over the uvd threshold within 100 ms after the input voltage is applied or the reset-pin is activated. capacitance on the output will affect the ramp-up and the start-up time. parallel operation pkn can be paralleled for redundancy if external o-ring diodes are used in series with the outputs. it is not recomended to parallel pkn for increased power. thermal data the pkn dc/dc power module can deliver full power up to +80c ambient at 1 m/s airflow. 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 or load inductance is larger than 10 h. their equivalent series resistance together with the capacitance acts as a lossless damping filter. suitable capacitor values are in the range 10C100 f. output voltage adjust (v adj ) to decrease the output voltage the resistor should be connected between pin 17 and pin 14C16 (+out 1). to increase the output voltage the resistor should be connected between pin 17 and pin 9C11 (Cout 1). output voltage, v o , can be adjusted by using an external resistor. alarm and control functions reset pin (r) when the reset pin (r) is connected to the negative input the converter will start after a delay of approximately 0.75 s and reset the alarm. the reset pin (r) shall normally be open and closed only when the converter shall start. to ensure safe turn-on the voltage difference between the negative input pin (Cin) and the reset pin (r) shall be less than 1.0 v. r is ttl open collector compatible. remote on/off (ro) turns off the converter when the remote off pin (ro) is connected to the positive input. the converter will stop after a delay of approxi-mately 1.5 second. to ensure safe turn-off the voltage difference between positive input pin (+in) and the remote off pin (ro) shall be less than 1.0 v. ro is ttl open collector compatible. the converter will restart when the ro pin is released. local on/off (lo) turns off the converter when the local off pin (lo) is connected to the positive input. the converter will stop immediately. to ensure safe turn-off the voltage difference between positive input pin (+in) and the remote off pin (lo) shall be less than 1.0 v. lo is ttl open collector compatible. the converter will restart when the lo pin is released. normal operation is achieved if the lo pin is open (nc) or connected to the Cin pin. if the lo pin is not used it is recommended to connect it to Cin. over voltage protection (ovp) the over voltage protection function will detect an over voltage on the output and immediately turn off the converter, at the same time the alarm pin (p) will go high. using the reset pin (r) or toggle the input voltage off / on starts the converter again. under voltage detection (uvd) the under voltage detection function will detect an under voltage on the output and immediately turn off the converter, at the same time the alarm pin (p) will go high. using the reset pin (r) or toggle the input voltage off / on starts the converter again. over temperature protection (otp) the pkn dc/dc power modules are protected from thermal over load by an internal over temperature shutdown circuit. when the case temperature exceeds +130 c 15c the converter will automa-tically shut down. use the reset pin (r) or toggle the input voltage off / on to restart the converter. current limit protection the output power is limited at loads above the current limit threshold (i lim ), specified as a minimum value. when the converter is in current limit function the output voltage will decrease until it reaches the uvd threshold, at the uvd threshold the converter will be turned off and the alarm pin (p) will go high. alarm pin (p) the alarm pin (p) will go high when the module is off. the alarm output pin can drive a current of 70 ma. operating information, single output
21 en/lzt 146 27 r4a ? ericsson microelectronics, february 2002 over voltage protection (ovp) output 1: the over voltage protection function will detect an over voltage on the output and immediately turn off the converter (both output 1 and 2). the ovp is input voltage dependent and has its highest level at approximately v i = 47.5 v, below that input voltage the output voltage is limited by the maximum duty cycle of the converter. using the local on/off pin (lo) starts the converter again. the remote control pin (rc) can also be used but the voltage difference between Cin pin and the rc pin shall be less than 0.08 v. output 2: the over voltage protection function will detect an over voltage on the output and limit the power conversion to output 2. over temperature protection (otp) the pkn dc/dc power modules are protected from thermal over load by an internal over temperature shutdown circuit. when the case temperature exceeds +130c 15c the converter will automatically shut down. if the temperature returns to a normal level normal operation automatically resumes. current limit protection output 1: the total output power is limited by the current limit on output 1. output 2: foldback current limiting when the current exceeds the output 2 current limiting threshold. operating information, dual output turn-off input voltage the pkn power module monitors the input voltage and will turn on and turn off at predetermined levels. the minimum hysteresis between turn on and turn off input voltage is 1v where the turn on input voltage is the highest. maximum capacitive load the pkn series of converters has no limitation of maximum connected capacitance on the output. capacitance on the output will affect the ramp-up and the start-up time. parallel operation pkn can be paralleled for redundancy if external o-ring diodes are used in series with the outputs. it is not recomended to parallel pkn for increased power. thermal data the pkn dc/dc power module can deliver full power up to +80c ambient at 1 m/s airflow. 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 or load inductance is larger than 10 uh. their equivalent series resistance together with the capacitance acts as a lossless damping filter. suitable capacitor values are in the range 10C100 f. output voltage adjust (v adj ) the two outputs can be independently adjusted. to decrease the voltage on output 1 the resistor should be connected between pin 17 and pin 15C16 (+out 1). to increase the voltage on output 1 the resistor should be connected between pin 17 and pin 12C14 (rtn). a 0.1 m resistor will change vout1 approximately 7%. to decrease the voltage on output 2 the resistor should be connected between pin 9 and pin 10C11 (+out 2). to increase the voltage on output 2 the resistor should be connected between pin 9 and pin 12C14 (rtn). a 0.1 m resistor will change vout2 approximately 5%. alarm and control functions remote control (rc) turns off the converter when the remote control pin (rc) is connected to the negative input. the converter will stop immediately. to ensure safe turn-off the voltage difference between negative input pin (C in) and the rc pin shall be less than 0.6 v. the converter will restart when the rc pin is released. normal is achieved if the rc pin is open (nc). local on/off (lo) turns off the converter when the local off pin (lo) is connected to the positive input. the converter will stop immediately. to ensure safe turn-off the voltage difference between positive input pin (+in) and the remote off pin (lo) shall be less than 1.0 v. lo is ttl open collector compatible. the converter will restart when the lo pin is released. normal operation is achieved if the lo pin is open (nc) or connected to the Cin pin. if the lo pin is not used it is recommended to connect it to Cin.
22 en/lzt 146 27 r4a ? ericsson microelectronics, february 2002 quality reliability meantime between failure (mtbf) is calculated to >1.7 million hours at full output power and a case temperature of +75c (t a =+40c), using the ericsson failure rate data system. the ericsson failure rate data system is based on field failure rates and is continously updated. the data corresponds to actual failure rates of conponent used in information technology and telecom equipment in temperature controlled environments (t a =-5+65c). the data is considered to have a confidence level of 90%. for more information see design note 002. quality statement the products are designed and manufactured in an industrial environment where quality systems and methods like iso 9000, 6s and spc, are intensively in use to boost the continuous improvements strategy. infant mortality or early failures in the products are screened out by a burn-in procedure and an ate- based final test. conservative design rules, design reviews and product qualifications, as well as high competence of an engaged work force, contribute to the high quality of our products. warranty ericsson microelectronics warrants to the original purchaser or end user that the products conform to this data sheet and are free from material and workmanship defects for a period of five (5) years from the date of manufacture, if the product is used within specified conditions and not opened. in case the product is discontinued, claims will be accepted up to three (3) years from the date of the discontinuation. for additional details on this limited warranty we refer to ericsson microelectronics abs general terms and conditions of sales, or individual contract documents. limitation of liability ericsson microelectronics does not make any other warranties, expressed or implied including any warranty of merchantability or fitness for a particular purpose (including, but not limited to, use in life support applications, where malfunctions of product can cause injury to a persons health or life). 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 microelectronics. these products are sold only according to ericsson microelectronics? general conditions of sale, unless otherwise confirmed in writing. specifications subject to change without notice.
23 en/lzt 146 27 r4a ? ericsson microelectronics, february 2002
preliminary data sheet en/lzt 146 27 r4a ? ericsson microelectronics ab, february 2002 the latest and most complete infor- mation can be found on our website ericsson microelectronics se-164 81 kista, sweden phone: +46 8 757 5000 www.ericsson.com/microelectronics for local sales contacts, please refer to our website or call: int. +46 8 757 4700, fax: +46 8 757 4776 product program v o /i o max output 1 v i ordering no. p o max 1.5v/20a 1.8v/20a 2.5v/17a 3.3v/15a 5v/10a 3.3v/15a 3.3v/15a 3.3v/15a 3.3v/15a output 2 pkn 4318 pioa pkn 4318 pi pkn 4419 pi pkn 4510 pi pkn 4511 pi pkn 4520 api pkn 4520 bpi pkn 4520 bpioa pkn 4520 bpioc 30 w 36 w 42 w 50 w 50 w 50 w 50 w 50 w 50 w 48/60 v 2.5v/6a 1.8v/8a 1.5v/8a 1.3v/8a

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