BSA5W BELLNIX | Alldatasheet
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Ultra High Efficiency 82 - 91% High Efficiency, Small, Low price, Step-Down DC-DC Converter BSA-5W Series is a step down converter which has achieved high efficiency with the ultra low price. By adopting an original multi chip module IC, it succeeded in cutting down the number of parts drastically. According to that, the reliability is improved higher and low cost has been achieved. For the function, it is built in the heat protection and over current protection. Heat sink is not required. <Features> Le - Ultra Small Type - Over-Heat Protection (For BSA24 model only) ery ss - High Efficiency ( 82-91%) - Over-Current Protection wa af ec - Original MCM - IC - Non- isolation converter si en cS \\ “% A - MTBF 1,000,000Hrs. - Heat sink not required \\\\ com ae - Low cost ~ Operating Temperature range -20°C to +70°C D) cm b t - Simple structure ( Possible Start up range -30°C to -20°C) bora a - Easy to use ; SIP / DIP type (Temperature derating required ) Bee - Adjustable output range ~ Long life, High reliability <Model, Rating> Table 1 Ratiny Ratin: Output Line Load Ripple & BSA Series Vde Vdc A (typ “ity p mVpp(typ “(typ Type BSA05-2,5S1R2 5 25 SIP Barere| amo | asso | 2] 2 [eo | > | © [te] BSA24-3.3S1R2 24 3.3 SIP. Semel ooo | an [oe ie | + | @ | 2 Fs BSA24-12S0R6 24 12 SIP. Note 1: Rating input voltage () value indicates Input voltage range. Note 2: Rating output voltage () value indicates adjustable, possible range. SSpecification> oc cmmmnmnmnsnnsinnununananninnnnnnsnnnnennsnnnmunnnuniien ee eae ~Aajustable Ouiputrangs | Output voltage is adjustable within the above range in Table + (By the external 3a cn v'i'ne specified condition is described in the above specification, VO volage is rating, Output current is maxc, and ambient temperature is 25°C Bellnix DC-DC CONVERTERS 1 020040715
Il e = a Bellnix <Outline> [Model [A [8 [ c_ [1] SIP Type > c BSAOSmodell 4.5 typ | 2.5 typ BSA05-2.5S1R2 25.4(+0.8-05) | to8 BSA24model BSA24-3.381R2 Number a 5 BSA24-12S0R6 — fe = roy [pin] Funetion | Ee ESE [a onon —| HS 3H & IE [2 | +vin | Hee Cee 5 ly 13° lS 1 N =AAGHG © tile F 05 ° Dimensions: mm 1028 Tolerances with nothing specified +0.5 2.54x4=10.16 : (Figure 1) [2] DIP Type 2.54. 15.24 2.54 (pin | Function | * | 9 6 BSA05-2.5S1R2-D ty esti Lot — KH ae BSA24-3.3S1R2-D to | ae AS 1 (RY Number «© [3 | GND Bsa2412s0R6-0 |} ZH (+) g [Ta avout | HS AY ps [st veg | HS" ] | [8 _|nocormecron| aa eee ih aL [5 _|pe-comecron] ty is 12 [2 [we conmecrio| 2.54%4=10.16 a 25.4(+9.8/-0.5) ~ Dimensions: mm : Tolerances with nothing specified +0.5 i i ATT 5 05 wo x oO ( Figure 2 ) <Block Diagram> ' BSA 5W Series +Vin__2h = Ja *Vout vance con Rt bc g Input cil } I] Tez Load § sy rs Open=Output OFF ( Figure 3 ) Short=Output ON Bellnix DC-DC CONVERTER 2 epoz0040715
High Efficiency, Small, Low price, Step-Down DC-DC Converter Watt 2BSA Series: <Usage> (A) Standard Connection Recommended Additional Capacitor BSA05-2.5S1R2 C1=16ZL330M (Rubycon) or KZE16VB330 (Nippon Chemi-con) Vin +Vout C2=10ZL680M (Rubycon) or KZE16VB680 (Nippon Chemi-con) 0? 40 BSA24-3.3S1R2 BSA SW “)e3 C1=50ZL120M (Rubycon) or KZES0VB120 (Nippon Chemi-con) + 103 8 (€2=10ZL470M (Rubycon) or KZE10VB470 (Nippon Chemi-con) we Oo e Top ‘Jtoed BS A24-1250RE onorF «6|SND Vaps 4 d & C1=50ZL120M (Rubycon) or KZES0VB120 (Nippon Chemi-con) VRO Se (C2=16ZL330M (Rubycon) or KZE16VB330 (Nippon Chemi-con) I swi Note 1: If ON/OFF is not controlled, it should be connected to Open=Output Off VR1: Vout Down Volume Resistance Short=Output On VR2: Vout Up Volume Resistance GND line. Note 2: When output voltage is rating, please open the terminal V. ADJ (Figure 4) (5 pin) Note 3: 1/0 capacitor (C1, C2) must be added. Please put I/O capacitor to pin close as much as possible and wire with thick pattern. For C1 & C2, please use low impedance capacitor. Note 4: For BSAQS model, when the additional capacitor's capacity is large, startup failure may occur. So please use an additional capacitor which capacity is 8,200uF or below. (B) ON/OFF Control Input voltage is turned on by using ON/OFF control function, and it is Usage Example possible for ON/OFF control of output voltage without cutting it. That is the effective function to compose the sequence of Power MOS-FET or Transistor etc. ome ; | 1.3 Supply Systems. Also using this function, you can save the electric | GND power when Power Supply stands by. Please connect the terminal O ON/OFF with GND. a or ° Between the terminal ON/OFF (1 Pin) and GND (3 Pin) _— - BSA05-2.5S1R2 Noise mao Output voltage OFF mode : OPEN (2V to +Vin) Output voltage ON mode : SHORT (-0.2 to 0.7V, 104A) ( Figure 5 ) BSA24-3.3S1R2 Output voltage OFF mode : OPEN (2.5 to 5.3 V) Output voltage ON mode : SHORT (-0.2 to 0.5 V, 250A ) BSA24-12S0R6 Output voltage OFF mode : OPEN (2.5 to 5.3 V) Output voltage ON mode : SHORT (-0.2 to 0.5 V, 250HA ) Note 1: Use an open collector (or drain) switch element for on/ off control. Note 2: Set the switch element for on/ off control close to the converter, and lessen the noise effect by parallel patern short loops, or by using shield wires. To prevent miss operation caused by noise, it is effective to connect a capacitor between the on/ off pin and GND. However, if this capacitor is too large, when impressing the input voltage at off, the charged current may flow and momentarily voltage may occur, so be sure that the max. value is 3300pF. Note 3: The on/ off pin voltage will be pulled up internally, so it is not necessary to impress voltage externally at off. Bellnix DC-DC CONVERTERS 3 BDD20040715.
High Efficiency, Small, Low price, Step-Down DC-DC Converter (C) Output voltage changeable direction 4 Please open the terminal V.ADJ when you use the output voltage with BSA SW ? Vout rating, without changing. By connecting resistance between the terminal Sees _ GND (3 Pin) and V.AD4 (6 Pin), you can change output voltage within the VRI range of voltage in Table 1. Please refer to the undermentioned equation <J 45 for the calculation of external resistance. Please confirm the output me | VDJ; Load voltage and adjust resistance value after calculating external resistance. Vref = Ry | VR2 3) no | (Figure 6 ) To reduce the output voltage ven = —BeeByx(vo-Vee RrxVref-Ry(Vo-Vref) vRo= OPEN VO = It is your option. To add the output voltage (for 2.5V and 3.3V model) [Model | 25S | 33S | 128 | ra = Vite wa FiVo Viel Vex [Ry [ok nm [22K | VR1 = OPEN VO = It is your option. Note 1: When using at rating without adjusting the output voltage, keep the V. ADJ pin (Spin) open. Note 2: V. ADJ pin (Spin) is a high impedance point, so in a bad environment this wiring may pick up noise and cause bad effect. When energizing, avoid switching the output by opening and shortening or switching the adjustable output resistor(R1, R2). And select a R1, R2 that is accurate and has good temperature characteristics, and mount it by soldering without using connectors or sockets when it is pretty close to the converter. Bellnix DC-DC CONVERTERS 4 BOD20040715
High Efficiency, Small, Low price, Step-Down DC-DC Converter e 2s a Belinix 3 Watt_BSA Series SS Note: These test data do not represent all products. <Turn-On transient> <Output Ripple & Noise> BSA05-2.5S1R2 BSA05-2.5S1R2 ren ae Ll \\ i | : | | Vout: OV i} i Sviciv ttpsecidiv Bm on ‘ameccldv Test conditions: Rating input/Rating load/Room temperature Test conditions: Rating input/Rating load/Room temperature BSA24-3.3S1R2 BSA24-3.3S1R2 —aav - + pop roi: : i Output Voltage ae ee ee a seheneleeeed Le | i" ! [twa | soma od bye i ‘slay ‘2 psectaiv on Test conditions: Rating input/Rating load/Room temperature Test conditions: Rating input/Rating load/Room temperature BSA24-12S0R6 BSA24-12S0R6 12V0.56A fected ie Deseebeeeetereete read Liw - SN aa Vv: Somvidivs : ( i I : : | aay a I ceded Bed ee 2malelv {2ps0cieiv on Test conditions: Rating input/Rating load/Room temperature Test conditions: Rating input/Rating load/Room temperature Bellnix DC-DC CONVERTERS 5 80020040715
High Efficiency, Small, Low price, Step-Down DC-DC Converter e 2 as Belinix 5 Watt_BSA Series ES <Temperature derating> Please set this products at good place for the convection. As to Temperature derating and air condition, please see the below. Cooling Condition : Natural Air Cooling La __ BSA05-2.5S1R2 | 5 Possible Start-up Range | 0.4 bot beovsbennct : -30 -20-10 0 10 20 30 40 50 60 70 80 BSA24-3.3S1R2
14 Vin=9V
1.0 Y Possible Start-up Range
< yf Eos ; Boe Operating Range = Vin=24V R | 0.5A 0.4 - " 4 oo Vin=36V = La “30-20 -10 0 10 20 30 40 50 60 70 80 Ambient Temperature (°C) BSA24-12SOR6 Y
0.5 Y Possible Start-up Range i
Fi Pry Vin=18,24V Operating Range S Vin=36V a g 0.2 0.4 30 -20 -10 0 10 20 30 40 50 GO 70 80 Ambient Temperature (°C) Bellnix DC-DC CONVERTERS 6 |D020040715
<Over-Current Protection> This model has a built-in over-current protection circuit (operating at rating 105% or more), and protects against the output over-current. It will automatically recover by releasing the over-current condition. Please avoid keeping long-time over-current or output short-circuit condition, it may cause converter's failure. For a protection in case a large current flows into the input, caused by the converter's failure, be sure to connect a fuse to the input +line. BSAO5 Series 41) Over-Current Protection The over-current characteristics are as you can see in figure 7, and will automatically recover by releasing the over-current condition. However, when the load impedance comes close to 0 and the current grows, the latch circuiit may operate. When the latch circuit operates, release the over-current condition and restart the input. oe a s aa oO t } 4 } D bd | > | | 3 | | 2 ea 5 | ‘a fe) ot 4 }———4 t t Output Current (A) (Figure 7) 2) Output Short-Circuit Protection The over-current protection will also operate when the output is short. However, when the output suddenly goes short, or restart the input when the output is still short, a very large current will flow into the converter momentarily and the over-current point may grow due to the short-circuit current, For a protection in case the output goes short or the load failure causes an output short-circuit condition, be sure to connect a fuse. BSA24 Series The over-current characteristics are as you can see in figure 8, and will automatically recover by releasing the over-current condition. T | ] ] | ] | | to | S ap | © ne i | i | > | | 3 |} f | 2 | | fe) [pan l | Output Current (A) (Figure 8) Bellnix DC-DC CONVERTERS 7 80020040715
<Reverse Bias Protection Between Output Pin and GND Pin> BSAO5 Series FUSE +vin [> 4 [rout BSA05-2.5S1R2 Series Vi 1 3 5 By | | Zan (Figure 9) For this BSAOS series, at turn-off transient of output, a negative voltage will occur in the output due to the reverse current flowing in from the output additional capacitor into the coil inside the converter. To keep the voltage low, connect the low schottky diode (D2) of VF between +Vout and GND. BSA24 Series A diode for reverse bias protection between the output pin and GND pin is not required. Bellnix DC-DC CONVERTERS 8 80020040718
High Efficiency, Small, Low price, Step-Down DC-DC Converter Belinix 3 Watt_BSA Series SS <Soldering Conditions> <Directions> Solder to be executed under the following conditions. For customer's safety, please see the specification and obey the 1. Hand Soldering Condition 340°C to 360°C_within Ssec. undermentioned notes definitely when using this product. 2. Wavesoldering Condition 240°C to 260°C. within 10sec. - This product intends to be used for a general electronic equipment (Clerical work machine, Telecommunications equipment, and Measurement equipment). Please do not use the medical equipment, the nuclear power equipment, and the train, etc, with dread that the damage of this product might influence the life and the property directly. Please confirm us when <Cleaning Conditions> you use except for the general electronic equipment. This product can not be cleaned bodily and is recommended non-cleaned —_- This product cannot be driven with parallel and series. flax. When and if cleaning only for SIP and DIP type should be necessary, _- Please use neither connector nor the socket to mount this product. use IPA and hand-wash the soldered surface by brush cleaning. The performance might not be able to be satisfied because of After cleaning, please dry enough to use it. the contact resistance, Please execute mounting on the printed wiring board by soldering = Although the overcurrent and the short-circuit protection circuit are built <To prevent reverse input voltage protection (ex.)> in this product, please avoid short-circuit for a long time as it causes The input/output of this products is a non-isolated type and a step-down the breakdown. DC-DC converter from (+) polarity to (+) polarity. If you connect the input _—_- There is a possible to be damaged for this product ifit is used in a non- polarity reversed of this product by mistake it will be eventually damaged. standard electric condition and an environmental condition etc. of the If there is a possibility of reverse connection, please add a protection temperature etc. Please use it in the standard. circuit as indicated in the following figure. The figure below is anexample _- Please make the earth electrical discharge done, and work about worker's using huse and diode. electrified static electricity which might be damaged by static electricity FUSE vin Vout in the environment static electricity ~ 2 4 = This product does not built the fuse inside. When it is abnormal, please BSA SW Series Load connect the fuse with + input line as protection for an excessive current . flows to the input. Please give capacity by which the fuse can be cut to Vin pi Beit 1 3.5 ‘co the power supply. = This product does not built in the overvoltage protection. - When the overvoltage is abnormally generated in the module, there is ‘a mode that the input voltage appears to the output straight, and causes (Figure 7) smoking and the ignition, Please add the overvoltage protection circuit to <Over-Voltage Protection (ex.)> prevent it. This product does not have a built-in over-voltage protection. - The examination result is not attached to this product. When the switching element of this converter gets damaged by short mode, input voltage (+Vin) will go out on the output. For emergency if it gets damaged at over-voltage mode, please add <Guarantee> a circuit as below to intercept the supplying power circuit. The guaranteed term of this product is one year. During this period, if there ruse vn wa should be any failure definitely due to our designing or manufacturing os 2 4 workmanship, we will repair or replace with new one at our own expense.
7 But in that case that you should modify and / or make internal remodeling
Ove: by itself whatsoever, we cannot guarantee it. Vin of 1 a. 5 7 Load This guarantee shall cover only 5 Watt BSA series. I <Others> Ld We will decide upon both deliberations when the doubt is caused in this catalog. (Figure 8) Notes: 1 When it is damaged at over-voltage mode, ON/ OFF control does not operate. 2 When there is a DC Power Supply on the supplying power side, please have the capacity the fuse can be cut, ri ellnss Belinix’ °° iw Belinix Co., Ltd. Ly ] 5-7-8 Negishi Minami-ku Saitama-shi, Saitama, JAPAN 336-0024 Bellnix Co., Ltd. ’ a y TEL: 81-48-864-7733 FAX: 81-48-861-6402 E-mail: info@belinix .co.jp —_ URL http:/Avww.bellnix.co.jp/ *All specification are subject to change without notice. PRINTED IN JAPAN 80020040715