5v/150ma output step-down dc/dc converter bp5223 data sheet absolute maximum ratings input voltage operating temperature range storage temperature range maximum surface temperature maximum output current parameter symbol limits unit vi topr tstg tsmax iopeak 18 ?25 to +80 ?25 to +85 100 150 v c c c ma unit ?2 ?1 conditions v v ma v v vpp % dc vi=14v, io=100ma vi=14v vi=8 to 18v, io=100ma vi=14v, io=0 to 100ma vi=14v, io=100ma vi=14v, io=150ma ? 1 maximum output current varies depending on ambient temperature ; please refer to derating curve. ? 2 the output ripple voltage may vary depending on the capacitance, environment, and location of peripheral components. especially right attention has to be paid to aluminum electrolytic capacitor, because esr changes greatly at the time of the low temperature and output ripple voltages increase. electrical characteristics input voltage range output voltage output current line regulation load regulation output ripple voltage power conversion efficiency parameter symbol typ. max. min. vi vo io vl vr vp 14.0 5.0 ? 0.03 0.05 0.06 80 18.0 5.3 150 0.10 0.15 0.15 ? 8.0 4.7 ? ? ? ? 75 conversion efficiency 90 80 70 60 50 40 30 20 10 0 0 30 90 120 150 60 (ta=25 c , vi=12.0v) output current io(ma) conversion efficiency (%) conversion efficiency dimensions (unit : mm ) application circuit external component specifications fuse: fuse use a fast-acting fuse of 0.5a rated voltage : beyond 50v capacitance : 33 to 220 f, low impedance type rated ripple current : beyond 0.1arms rated voltage : beyond 25v capacitance : 100 to 470 f, low impedance type esr : less than 0.39 ? rated ripple current : beyond 0.37arms evaluate under actual operating conditions since it affects the output ripple voltage. c1: input capacitor c2: output capacitor rated voltage : beyond 25v capacitance :0.1 to 0.22f film or ceramic capacitor c3: noise removal capacitor pin no. 1 2 3 4 5 function input terminal vi not used gnd gnd output terminal vo please verify operation and characteristics in the customer's circuit before actual usage. ensure that the load current does not exceed the maximum rating. derating curve derating curve operation range 160 140 120 100 80 60 40 20 0 0 10 -30 -20 -10 20 4030 80706050 90 ambient temperature ta( c ) output current io(ma) load regulation 0 1 2 3 4 5 6 0 50 150 200 250 100 (ta=25 c , vi=12v) output current io(ma) output voltage vo(v) load regulation bp5223 be sure to use fuse for safety. 1 3 4 5 c1 c2 io c3 vo vi l in + oscillataion frequency characteristics 200 180 160 140 120 100 80 60 20 40 0 0 30 90 120 150 60 output current io(ma) oscillation frequency (khz) oscillation frequency surface temperature increase 0 4 2 6 8 10 12 14 16 18 20 0 30 90 120 150 60 (ta=25 c , vi=12v) output current io(ma) temperature rising ?t( c ) surface temperature increase 54 1 3 16.8max. 4.01.0 2.54 x 4=10.16 p=2.540.2 1.30.2 0.50.1 3.25max. 10.4max. 5.25max. 5.15max. 0.250.05 17.0max. mark side 100-200vac input/12w output isolated ac/dc converter BP5728 data sheet electrical characteristics absolute maximum ratings parameter symbol limits unit 6pin input voltage v d 800 v 2pin input voltage ?0.2 to +6 3pin input voltage v dd 24 v v 0.64 105 ma dimensions (unit : mm) derating curve load regulation (in case of 12v output) 18.8max. 9.9max. 19.5max. marking side 4.01.0 2.540.2 1 2 3 6 0.250.05 4.35max. 2.54x5=12.7typ. p d w max surface temperature allowable loss tcmax c operating temperature range topr ?25 to +80 c storage temperature range tstg ?25 to +105 c v fb marking side 3.25max. 0.50.1 1.30.2 5.55max. conversion efficiency (in case of 12v output) 3pin input current i dd 8 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 -30 -10 10 30 50 70 90 ambient templature ta / c derating curve allowable loss / w tsmax=105 c tsmax=105 c operation range operation range co nve rsion efficiency (vi=311v, ta=25 c) 0 10 20 30 40 50 60 70 80 90 0 200 400 600 800 1000 output current / ma conversion efficiency / % output charasteristic (vi=311v, ta=25 c) 0 2 4 6 8 10 12 14 0 500 1000 1500 2000 output current / ma output voltage / v parameter symbol min. typ. max. unit conditions parameter symbol v dd min. typ. unit conditions i fb =0.5ma i fb =01.55ma turn on voltage v dd on 16.5 17.5 v v dd =017.5v zero-duty i fb ioz 0.85 1.15 % input voltage v dd 8.9 12 20 v ? i fb =0.5ma output frequency fo 59 71 65 khz turn off voltage v dd off 8.3 8.9 v v dd =17.50v maximum duty duty max 75 15.5 7.7 68 82 1.45 ma (v dd =15v, vd=15v,i fb =0.1ma,sw1=r1,ta=25 c, unless otherwise specified) max. over drain current protection idocp 10v 15v 20v 217 269 314 247 302 349 281 338 388 ma v d =015v sw1=r2 application circuit (in case of 12v output) com fb v dd v d pin no. terminal name 1 2 3 6 terminal function common terminal at primary side feed back terminal power supply terminal for internal drive drain terminal for built-in fet c13 c12 ic2 + c7 d4 pc1 ns + c5 d3 nd np d2 c4 + c3 f1 db fl1 c2 c1 r6 r7 r8 r9 r5 r4 r3 r2 f2 r1 znr1 BP5728 be sure to use fuse for safety. ac80 to 154v(100v ) ac154v to 286v(200v ) 12v/0.5a(100v ) 12v/1a(200v ) t1 vo gnd ic1 1 2 3 6 external component specifications c1,c2 : c3 : c4 : c5 : c7 : c12 : c13 : d2 : d3 : d4 : db : f1.f2 : ic1 : rated at 300vac or higher 0.1 to 0.22 f 22f / 450v 2200pf / 1kv 10 f / 50v 470 f / 35v low impedance 0.1 f / 50v 2200pf / ac250v frd 800v / 0.5a 80v / 0.1a sbd 90v / 3a 800v / 1a use for safety BP5728 noise reduction capacitors input smoothing capacitor noise reduction capacitor vdd smoothing capacitor output capacitor phase compensation capacitor noise reduction capacitor rectifier diode rectifier diode rectifier diode diode bridge fuse BP5728 ic2 : fl1 : r1 : r2 : r3 : r4 : r5 : r6 : r7 : r8 : r9 : pc1 : t1 : znr1 : shunt regulator noise reduction filter resistor resistor resistor resistor resistor resistor resistor resistor resistor photo coupler switching transformer varistor vref=2.495v use if necessary 0? 750k? 0.5w / 600v 200k? / 3w 51? / 0.125w 1k? / 0.1w 15k? / 0.1w 3k? / 0.1w 4.7k? / 0.1w 1k? / 0.1w pc817 srw25es-47v015(tdk) a varistor is required to protect against lightning surges and static electricity. operating principle c5 is charged by r2 when the power is on, and the switching starts when the voltage at v dd pin reaches the voltage threshold (17.5v max.) vdd is supplied via nd and fb current flows to pc1 once vo exceeds the threshold voltage. once pc1 turns on a current ioz flows through the transistor. also, fb current runs to pin 2 of BP5728 when vo exceeds the designed voltage and the constant voltage control is executed. the input current will increase if the output power increases, and the overcurrent protection circuit will turn on once the drain current exceeds the specified value (idocp). 1.when turned on : 2.during operation : 3.in overcurrent conditions : 1/1 2010.01 - rev.a www.rohm.com ?2010 rohm co., ltd. all rights reserved.
r1010 a www.rohm.com ? 2010 rohm co., ltd. all rights reserved. notice rohm customer support system http://www.rohm.com/contact/ thank you for your accessing to rohm product informations. more detail product informations and catalogs are available, please contact us. notes no copying or reproduction of this document, in part or in whole, is permitted without the consent of rohm co.,ltd. the content specified herein is subject to change for improvement without notice. the content specified herein is for the purpose of introducing rohm's products (hereinafter "products"). if you wish to use any such product, please be sure to refer to the specifications, which can be obtained from rohm upon request. examples of application circuits, circuit constants and any other information contained herein illustrate the standard usage and operations of the products. the peripheral conditions must be taken into account when designing circuits for mass production. great care was taken in ensuring the accuracy of the information specified in this document. however, should you incur any damage arising from any inaccuracy or misprint of such information, rohm shall bear no responsibility for such damage. the technical information specified herein is intended only to show the typical functions of and examples of application circuits for the products. rohm does not grant you, explicitly or implicitly, any license to use or exercise intellectual property or other rights held by rohm and other parties. rohm shall bear no responsibility whatsoever for any dispute arising from the use of such technical information. the products specified in this document are intended to be used with general-use electronic equipment or devices (such as audio visual equipment, office-automation equipment, commu- nication devices, electronic appliances and amusement devices). the products specified in this document are not designed to be radiation tolerant. while rohm always makes efforts to enhance the quality and reliability of its products, a product may fail or malfunction for a variety of reasons. please be sure to implement in your equipment using the products safety measures to guard against the possibility of physical injury, fire or any other damage caused in the event of the failure of any product, such as derating, redunda ncy, fire control and fail-safe designs. rohm shall bear no responsibility whatsoever for your use of any product outside of the prescribed scope or not in accordance with the instruction manual. the products are not designed or manufactured to be used with any equipment, device or system which requires an extremely high level of reliability the failure or malfunction of which may result in a direct threat to human life or create a risk of human injury (such as a medical instrument, transportation equipment, aerospac e machinery, nuclear-reactor controller, fuel- controller or other safety device). rohm shall bear no responsibility in any way for use of any of the products for the above special purposes. if a product is intended to be used for any such special purpose, please contact a rohm sales representative before purchasing. if you intend to export or ship overseas any product or technology specified herein that may be controlled under the foreign exchange and the foreign trade law, you will be required to obtain a license or permit under the law.
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