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sanken electric co., ltd. http://www.sanken-ele.co.jp/en/ description the BR204 is a thin type pol converter modules with an industry standard exterior shape and footprint, responsive to very high speed loads and compatible with ceramic capacitors. it can be used as a design-free pol converter for a 12 v system intermediate bus. it can be configured easily, reducing overall design time, and allowing reuse of designs. miniaturization was achieved by high frequency switching technology, allowing saving space on the application pcb. soldering capability has been significantly improved by adoption of end face through holes. features and benefits ? industry standard footprint ? improved soldering: gold-plated pads and side notches ? synchronized rectifying type stepdown chopper ? high power ? high efficiency: 95.1% at v in = 12 v, v o = 5 v, i o = 7 a ? operating temperature range: ?40c to 85c ? input voltage range: 10.8 to 13.2 vdc ? output voltage: 1.6 to 5.5 v ? output current range: 0 to 10 a ? operating frequency: 600 khz ? overcurrent protection function pol converter module for 12 v system intermediate bus package: module BR204 BR204-ds rev. 0.03e applications: ? communication devices ? computer server ? other low power conversion r trim BR204 on/off pg vin gnd v in power good c out gnd v out v pg (5 v) c in on/off vs+ vout rtrim typical application circuit 20.3 11.4 4.2 mm
2 sanken electric co., ltd. BR204-ds, rev. 0.03e pol converter module for 12 v system intermediate bus BR204 absolute maximum ratings , valid at t a = 25c characteristic symbol notes pins rating unit on/ o f f pin voltage v onoff 17v pg pin voltage v pg sink current 7 ma 9 7 v operating temperature range t a ? ?40 to 85 c storage temperature range t stg ? ?40 to 85 c operating humidity range h op no condensation ? 20 to 85 % storage humidity range h stg no condensation ? 10 to 95 % selection guide part number output voltage, v out (v) operating frequency, f op (khz) BR204 1.60 to 5.5 600 the polarity value for current specifies a sink as "+," and a source as ? ? ,? referencing the ic.
3 sanken electric co., ltd. BR204-ds, rev. 0.03e pol converter module for 12 v system intermediate bus BR204 electrical characteristics unless specifically noted, t a is 25c characteristic symbol test conditions min. typ. max. unit input voltage range v in 10.8 12.0 13.2 v output voltage v out adjust with r trim 1.60 ? 5.5 v output current i out with temperature derating 0 ? 10 a output voltage accuracy err vout v in = 10.8 to 13.2 v, i out = 0 to i out (max), operating temperature range, r trim =1% accuracy ?2.0 ? 2.0 %v out ripple voltage 1 v rip bw = 20 mhz, v out = 5 v, i out = 0 to10 a, c out = 200 f ? 10 50 mv p-p efficiency v in = 12 v, i out = 10 a, v out = 5 v ? 94.7 ? % operating frequency f op ? 600 ? khz overcurrent protection threshold i out(ocp) hiccup ? 24.5 ? a input capacitor 2 c in when input voltage is an ideal voltage source 20 ? 5000 f output capacitor 2 c out when input voltage is an ideal voltage source 200 ? 1400 f startup time t r v out from 10% to 90% points ? 0.7 ? ms start delay time t d with the on/ o f f pin open, measured from the vin pin switching high, to v out reaching 10% of operating level (see figure 1) ? 2 ? ms on/ o f f start delay time t rcd with the vin pin high, measured from the on/ o f f pin switching open, to v out reaching 10% of operating level (see figure 2) ? 2 ? ms interface characteristics power good p wgl lower limit of power good 83.1 87.3 91.5 %v out p wgh upper limit of power good 109.3 112.7 116.9 %v out on/ o f f pin high voltage v ih when the on/ o f f pin is set open, the BR204 converter is turned on 0.55 0.70 1.00 v on/ o f f pin low voltage v il when the on/ o f f pin is pulled down to gnd, the BR204 converter is turned off 0.27 0.30 0.33 v 1 see the ripple voltage measuring method section. 2 place a decoupling capacitor near the vin terminal and the vout terminal of the BR204 device.
4 sanken electric co., ltd. BR204-ds, rev. 0.03e pol converter module for 12 v system intermediate bus BR204 characteristic definitions figure 1. start delay time, t d , definition vin 0 v out t r 0 90% 10% 0 on/off (open) t d vin 0 v out t r 0 90% 10% 0 on/off open t rcd figure 2. on/ o f f start delay time, t rcd , definition
5 sanken electric co., ltd. BR204-ds, rev. 0.03e pol converter module for 12 v system intermediate bus BR204 performance characteristics t a = 25c t a (c) i o (a) 14 12 10 8 6 4 2 0 40.0 50.0 60.0 70.0 80.0 90.0 i o (a) (%) 100 80 60 40 20 0 02468 v in = 10.8 v v in = 12.0 v v in = 13.2 v 10 v out = 5.0 v temperature derating v out = 5 v, v in = 12 v 1.5 m/s air ow measuring condition: product soldered directly to 101.6 101.6 mm, 1.6 mm thick, 6-layer pcb pcb is mounted vertically during measurement measuring locations (centers of top surface of major components) airflow ef ciency versus output current
6 sanken electric co., ltd. BR204-ds, rev. 0.03e pol converter module for 12 v system intermediate bus BR204 functional description power good ( pg) operation when output voltage, v out , is within the output voltage accu- racy limits, err vout , the pg pin is disconnected internally by the mosfet switch. the signal at the power good node is pulled up to 5 v. if v out falls out of the accuracy limits, the mosfet switch connects pg to gnd, and the signal at the power good node is pulled low. the pg peripheral circuit is shown in figure 3. output sensing ( vs+) and compensation reduction in output voltage can be compensated by connecting the output sense terminal, vs+ , to the load. when using lc filter, the proper connection is shown in panel a of figure 4. note: do not connect the output sense terminal to the output of the lc filter. it may not operate normally. caution: when the output sense terminal is not used, it must be connected directly to the vout output terminal. this is shown in panel b of figure 4. external on/off output control (on/ o f f ) operation of the output of the product can be turned on and off by using the on/off function, irrespective of input voltage connec- tion. this is enabled by connection of the on/ o f f pin (pin 1) (refer to figure 5): ? when the on/ o f f pin is open, the output voltage is on ? when the on/ o f f pin is connected to gnd, the output voltage is off the on/ o f f pin is also used as a soft-start function. do not con- nect the on/ o f f pin to the other pins in parallel, and be sure to connect the on/ o f f pin to a single switch device such as a fet (see figure 5). do not pull-up the on/ o f f pin from the external voltage source. caution: ? the on/ o f f pin is pulled-up inside the BR204 converter. therefore, a voltage of 6.5 v is output to the on/ o f f pin. ? do not feed voltage to the on/ o f f pin from outside BR204 converter. power good gnd v pg (5v) pg gnd BR204 BR204 vout gnd vs+ load c out BR204 gnd load l c ol c out vout vs+ on/off gnd BR204 figure 3. pg peripheral circuit figure 4. vs+ peripheral circuit (a) (b) figure 5. on/ o f f peripheral circuit
7 sanken electric co., ltd. BR204-ds, rev. 0.03e pol converter module for 12 v system intermediate bus BR204 r trim constant reference value for output voltage the output voltage level is set by the value of a resistance con- nected to the rtrim pin. the relationship is: r trim ( ) = (0.591 10,000) / (v out (v) ? 0.591) the following table provides representative values for r trim to generate voltages within the specified v out ranges: BR204 v out (v) r trim ( ) 5.5 1203 5 1340 3.63 1944 3.3 2181 2.5 3095 1.8 4888 1.6 5857 reset conditions there are two methods for resetting all functions in the BR204 (refer to figure 6): ? set vin pin voltage to 0.5v or lower for a minimum of 100 ms, or ? set the on/ o f f pin voltage to 0.27 v or lower for a minimum of 10 ms max. 0.5 v input voltage (v) 0 0 time (ms) time (ms) device resets min. 100 ms max. 0.27 v min. 10 ms device resets 0 0 on/off pin voltage (v) figure 6. reset conditions timing diagrams
8 sanken electric co., ltd. BR204-ds, rev. 0.03e pol converter module for 12 v system intermediate bus BR204 application information test measuring circuit the test measuring circuit used for establishing the BR204 elec- trical characteristics is is shown in figure 7. the decoupling capacitors, c in and c out , should be ceramic capacitors, placed near the i/o terminals of the BR204. ripple voltage measuring method figure 8 provides the test measurement circuit used for establish- ing voltage ripple. figure 7. test circuit for electrical characteristics figure 8. test circuit for ripple voltage measurement r trim BR204 on/off pg vin gnd v in power good c out gnd v out v pg (5 v) c in c in : ceramic capacitor (120 f) c out : ceramic capacitor (200 f) on/off vs+ vout rtrim vin vout v in c in c out gnd rated load 50 10 nf terminator oscilloscope bw 20 mhz z = 1 m BR204 1.5d2v coaxial cable (rg-174/u equivalent) 1.5 m length ceramic capacitor, 100 f install near the test probe keisoku giken trc-50f equivalent circuit switching period vrip
9 sanken electric co., ltd. BR204-ds, rev. 0.03e pol converter module for 12 v system intermediate bus BR204 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. ? all dimensions are in millimeters ? dimensions shown in parentheses are reference dimensions. ? product weight 1.5 g ? product outline 20.3 x 11.4 x 4.2 mm (w d h) tolerance includes burrs and protrusions remaining from splitting the printed circuit board ? coplanarity 0.1 mm (max) 20.32 0.5 11.43 0.5 lot number scale: 1:2 4.2 max (0.85) pick-up point pin 1 identifier mark (silkscreen) product identification number: 4 for BR204
10 sanken electric co., ltd. BR204-ds, rev. 0.03e pol converter module for 12 v system intermediate bus BR204 pcb board layout and pin-out diagram pin list table number name function 1 on/ o f f input for external control of output 2 vin supply for device 3, 8,10 nc no connection 4 gnd device ground terminal 5 rtrim output voltage level setting terminal, connect to external resistor r trim 6 vout output voltage terminal 7 vs+ output feedback sense terminal 9 pg power good flag output BR204 bottom view 1.28 1.58 1.98 0.72 0.72 0.15 0.15 9.91 2.14 (11.43) 5.72 1.27 5.72 1.52 1.27 1.43 1.99 0.72 1.73 5.84 9.91 13.97 18.80 (20.32) 10.16 2.14 2.44 1.52 nc(3) gnd(4) vout(6) rtrim(5) vs+(7) nc(8) on/off(1) pg(9) nc(10) vin(2) ? the tolerance for all dimensions shown is 0.1 mm. ? there are lands of the module, pattern, and through holes. please give consideration to providing sufficient creepage distanc e when designing the pattern (the traces of different potentials are placed for a creepage distance of 0.25 mm from the land boundaries indicated by the dotted lines). ? the shaded areas indicate dimensions of lands (copper foil dimensions) on the pcb. (1.43 mm x 2.14 mm are the dimensions of a land / footprint.) dimensions of a footprint do not include tolerance. dimensions include only an assumed mounting variance o f 0.15 mm for both vertical and horizontal directions. ? in actual use of a module, please consider actual mounting variances and adjust footprint dimensions. ? a dotted line indicates a pad of a module. the area which exceeds the footprint dimensions of 1.43 mm x 2.14 mm is the extend ed pad. when a user requires improvement in power dissipation and to maximize soldered area, it is recommended to cover the whole shaded area. but if a user does not require the improvement, please use the module with minimum pad area, 1.43 mm x 2.14 mm. figure 9. optional edge soldering at through hole centers
11 sanken electric co., ltd. BR204-ds, rev. 0.03e pol converter module for 12 v system intermediate bus BR204 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. 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. cautions for use ? do not use the power modules under overload conditions as that will damage the module and cause a malfunction or failures. ? use the products within the specified input voltage range. operating precautions
12 sanken electric co., ltd. BR204-ds, rev. 0.03e pol converter module for 12 v system intermediate bus BR204 ? 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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