sanken electric co., ltd. http://www.sanken-ele.co.jp/en/ description the BR301 is non-isolated step down type dc/dc converter module. the single module includes: a control ic, inductor, ceramic capacitor, and standoff pins. this provides a complete dc / dc converter solution, requiring few external components. it can be configured easily, reducing overall design time, allowing reuse of designs, and saving space on the application pcb. features and benefits ? input voltage range 8 to 30 vdc ? circuit topology: step-down chopper ? switching frequency: 350 khz ? output: 3.3 v, 1 a, 3.3 w ? module footprint: 14 14 10 mm (w d h) ? weight: 1.6 g ? all in one ? design-free ? high efficiency: 87% (typ) at v in = 8 v, i o = 0.6 a ? miniaturizes space required, by using high-frequency switching technology ? protection functions: ? overcurrent protection function (ocp), with auto restart ? thermal shutdown protection function (tsd), with auto restart 3.3 v, 1 a non-isolated step down dc/dc converter module typical application circuit BR301 BR301-ds, rev. 1.0 september 11, 2012 applications: ? factory automation ? communication devices ? consumer electronics ? other low power conversion vin vo v in 8 to 30 v c in 220 f c o electrolytic 470 f or ceramic 30 f 1 3 2 4 gnd nc load BR301 14 14 mm (11 mm height mounted) package: module
2 sanken electric co., ltd. BR301-ds, rev. 1.0 3.3 v, 1 a non-isolated step down dc/dc converter module BR301 september 11, 2012 selection guide part number BR301 the polarity value for current specifies a sink as "+," and a source as ? ? ,? referencing the ic. absolute maximum ratings , valid at t a = 25c characteristic symbol notes pins rating unit input voltage v in 4 ? 2 ?0.3 to 35 v operating temperature range top see the derating curve ? ?20 to 85 c operating humidity range hop no condensation ? 10 to 90 % storage temperature range tstg ? ?20 to 85 c storage humidity range hstg no condensation ? 5 to 95 % vibration (non-operation) frequency ? ? 10 to 55 hz acceleration ? ? 19.6 m/s 2 sweep time ? ? 1 minute vibration ? ? 1.5 mm vibration direction ? ? x,y,z ? vibration time ? ? 2 hour shock capability ? dropped from 50 mm height to a concrete sur- face, five times each on left and right sides. ? no failure ? recommended operating conditions , valid at t a = 25c, unless otherwise specified characteristic symbol conditions pins min. max. unit input voltage range v in 4 ? 2 8 30 v output current range i o 1 ? 2 0 1 a
3 sanken electric co., ltd. BR301-ds, rev. 1.0 3.3 v, 1 a non-isolated step down dc/dc converter module BR301 september 11, 2012 electrical characteristics unless specifically noted, t a is 25c characteristic symbol test conditions pins min. typ. max. unit input current i in v in = 24 v, i o = 1 a 4-2 ? 0.17 ? a standby power p stb v in = 24 v, i o = 1 a 4-2 ? 0.13 ? w output voltage v o 1-2 ? 3.30 ? v constant voltage accuracy v acc 1-2 ? 3.0 ? 3.0 % output current i o 1-2 0 ? 1.0 a maximum output power p o(max) 1-2 ? ? 3.3 w output voltage ripple* v rip v in = 24 v, i o = 1 a 1-2 ? 50 ? mv p-p output voltage noise* v noise v in = 24 v, i o = 1 a 1-2 ? 50 ? mv p-p output overcurrent protection i ocp 1-2 1.1 ? ? a * the ripple measurement is made at both ends of the electrolytic capacitor c o (470 f). for the capacitor c in , a yxf type made by rubycon for switching power supplies, or equivalent, is recommended. for c o , a low impedance zl type made by rubycon for switching power supplies, or equivalent, is recommended. in this case, a 470 f electrolytic capacitor was connected at 10 mm trace length from the output terminal. ripple current measurement circuit vin vo v in c in 220 f c o 470 f electrolytic 1 2 10 mm trace length 4 gnd rated load 50 10 nf terminator oscilloscope bw 20 mhz z = 1 m BR301 1.5d2v coaxial cable (rg-174/u equivalent) 1.5 m length
4 sanken electric co., ltd. BR301-ds, rev. 1.0 3.3 v, 1 a non-isolated step down dc/dc converter module BR301 september 11, 2012 performance characteristics at v o = 3.3 v v in = 8 v, i o = 0 a v in = 30 v, i o = 0 a v in = 8 v, i o = 1 a v o (2 v/div) v o (2 v/div) v o (2 v/div) v o (2 v/div) v sw (5 v/div) v sw (5 v/div) v sw (5 v/div) v sw (5 v/div) v in (2 v/div) v in (2 v/div) v in (10 v/div) v in (2 v/div) i l (500 ma/div) i l (500 ma/div) i l (500 ma/div) i l (500 ma/div) v in = 30 v, i o = 1 a t = 1.00 s/div t = 2.00 s/div t = 1.00 s/div t = 1.00 s/div
5 sanken electric co., ltd. BR301-ds, rev. 1.0 3.3 v, 1 a non-isolated step down dc/dc converter module BR301 september 11, 2012 performance characteristics temperature rise at v in = 30 v, v o = 3.3 v, i o = 1 a measurement points temperature (c) temperature rise (c) inductor top 68.5 41.2 diode top 71.5 44.2 ceramic capacitor top 58.7 31.4 ic bottom 74.8 47.5 input ceramic capacitor bottom 64.2 36.9 output ceramic capacitor bottom 62.2 34.9 ambient temperature D 27.3 D regulation output efficiency derating curve (natural cooling)
6 sanken electric co., ltd. BR301-ds, rev. 1.0 3.3 v, 1 a non-isolated step down dc/dc converter module BR301 september 11, 2012 typical application vin vo v in 8 to 30 v c in 220 f c o electrolytic 470 f or ceramic 30 f 1 3 2 4 gnd nc load BR301 typical application circuit example ? an input electrolytic capacitor, c in , of approximately 220 f should be connected to the input side of the BR301. if the input voltage is stable, it is not required. ? an output capacitor, c o , either electrolytic of approximately 470 f or ceramic of approximately 30 f should be connected to the output side of the BR301. ? for c in , a yxf type made by rubycon for switching power supplies or equivalent is recommended. ? for c o , either a low impedance zl type made by rubycon, or three ceramic capacitors connected in parallel (grm31cr71e106ka12 made by murata), for switching power supplies or equivalent are recommended. ? depending on pcb layout, output voltage ripple could be amplified. please check the output voltage ripple in the actual application.
7 sanken electric co., ltd. BR301-ds, rev. 1.0 3.3 v, 1 a non-isolated step down dc/dc converter module BR301 september 11, 2012 functional block diagram vin 3 4 vo 1 nc 2 gnd BR301 regulator ic pin list table number name function 1vo output terminal of the positive electrode of the dc / dc converter. the output load can be taken from this pin and the gnd pin 2 gnd ground terminal of the dc / dc converter. the output load can be taken from this pin and the vo pin 3 nc not connected. do not use this pin. 4 vin input terminal of the positive electrode of the dc / dc converter. the input voltage of 8 to 30 vdc can be supplied between this pin and the gnd pin. 14 23 vo gnd vin nc pin-out diagram
8 sanken electric co., ltd. BR301-ds, rev. 1.0 3.3 v, 1 a non-isolated step down dc/dc converter module BR301 september 11, 2012 package outline drawing pb-free, compliant with the rohs directive. rohs directive compliance: lead, cadmium, mercury, hexavalent chromium and pbb, pbde meet the specified criteria on the basis of eu directive 2002/95/ec, except for nonrestricted materials. 7.62 0.15 11 (3.4) 1.6 (5) 3 14 0.3 bottom view 10.16 0.15 14 0.5 2.5 (?1.2) 4 x ?0.8 0.05 ? all dimensions are in millimeters ? the tolerance is 0.3mm unless otherwise specified. ? dimensions shown in parentheses are reference dimensions. ? pb-free. device composition compliant with the rohs directive ? product weight 1.6 g ? product outline 14 x 14 x 10 mm (w d h) v0 vin nc the BR301 type is indicated by a red ink dot on the top side, at this location br300 sk gnd type indicator view
9 sanken electric co., ltd. BR301-ds, rev. 1.0 3.3 v, 1 a non-isolated step down dc/dc converter module BR301 september 11, 2012 because reliability can be affected adversely by improper storage environments and handling methods, please observe the follow- ing cautions. cautions for storage ? ensure that storage conditions comply with the standard temperature (5c to 35c) and the standard relative humidity (around 40% to 75%); avoid storage locations that experience extreme changes in temperature or humidity. ? avoid locations where dust or harmful gases are present and avoid direct sunlight. ? reinspect for rust on leads and solderability of products that have been stored for a long time. cautions for testing and handling when tests are carried out during inspection testing and other standard test periods, protect the products from power surges from the testing products, shorts between the product pins, and wrong connections. in addition, avoid tests exceeded ratings. soldering ? when soldering the products, please be sure to minimize the working time, within the following limits. ? 260 5c 10 1 s (flow, 2 times) ? 350 5c 3.0 0.5 s (soldering iron, 1 time) at a distance of 3.4 mm from the main body of the products. electrostatic discharge ? when handling the products, the operator must be grounded. to prevent shock hazard, grounded wrist straps should be used and at least 1 m of resistance from the operator to ground should be placed near the operator. ? workbenches where the products are handled should be ground- ed and be provided with conductive table and floor mats. ? when using measuring equipment such as a curve tracer, the equipment should be grounded. ? when soldering the products, the head of a soldering irons or the solder bath must be grounded in order to prevent leak volt- ages generated by them from being applied to the products. ? the products should always be stored and transported in sanken shipping containers or conductive containers, or be wrapped in aluminum foil. operating precautions
10 sanken electric co., ltd. BR301-ds, rev. 1.0 3.3 v, 1 a non-isolated step down dc/dc converter module BR301 september 11, 2012 ? the contents in this document are subject to changes, for improvement and other purposes, without notice. make sure that this is the latest revision of the document before use. ? application and operation examples described in this document are quoted for the sole purpose of reference for the use of the prod- ucts herein and sanken can assume no responsibility for any infringement of industrial property rights, intellectual property r ights or any other rights of sanken or any third party which may result from its use. ? although sanken undertakes to enhance the quality and reliability of its products, the occurrence of failure and defect of se micon- ductor products at a certain rate is inevitable. users of sanken products are requested to take, at their own risk, preventativ e measures including safety design of the equipment or systems against any possible injury, death, fires or damages to the society due to device failure or malfunction. ? sanken products listed in this document are designed and intended for the use as components in general purpose electronic equ ip- ment or apparatus (home appliances, office equipment, telecommunication equipment, measuring equipment, etc.). when considering the use of sanken products in the applications where higher reliability is required (transportation equipment and its control systems, traffic signal control systems or equipment, fire/crime alarm systems, various safety devices, etc.), and whenever long life expectancy is required even in general purpose electronic equipment or apparatus, please contact your nearest sanken sales representative to discuss, prior to the use of the products herein. the use of sanken products without the written consent of sanken in the applications where extremely high reliability is requi red (aerospace equipment, nuclear power control systems, life support systems, etc.) is strictly prohibited. ? in the case that you use sanken products or design your products by using sanken products, the reliability largely depends on the degree of derating to be made to the rated values. derating may be interpreted as a case that an operation range is set by dera ting the load from each rated value or surge voltage or noise is considered for derating in order to assure or improve the reliability. in general, derating factors include electric stresses such as electric voltage, electric current, electric power etc., environmental stres ses such as ambient temperature, humidity etc. and thermal stress caused due to self-heating of semiconductor products. for these stress es, instantaneous values, maximum values and minimum values must be taken into consideration. in addition, it should be noted that since power devices or ic's including power devices have large self-heating value, the de gree of derating of junction temperature affects the reliability significantly. ? when using the products specified herein by either (i) combining other products or materials therewith or (ii) physically, ch emically or otherwise processing or treating the products, please duly consider all possible risks that may result from all such uses in advance and proceed therewith at your own responsibility. ? anti radioactive ray design is not considered for the products listed herein. ? sanken assumes no responsibility for any troubles, such as dropping products caused during transportation out of sanken's dis tribu- tion network. ? the contents in this document must not be transcribed or copied without sanken's written consent.
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