 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| ha16341nt/fp, ha16342nt/fp redundant secondary switching power supply controller ade-204-035c (z) rev.3 apr. 2001 description the ha16341nt/fp and the ha16342nt/fp are switching regulator control ics for the off-line converters of redundant power supplies. the ha16342nt/fp is reverse current detection less version of the ha16341nt/fp. the ha16341nt/fp have the functions of current sharing and hot swap control for redundancy. these functions enable high efficiency and high reliability for switching power supplies. combination the ha16341 with the ha16141 is suitable for the redundant ac to dc converters. features ? secondary-side synchronous rectification control ? main switching controller ? dead-time adjustment for synchronous rectification mos ? current share function with line resistance compensation ? hot swap power mos fet control ? remote on/off function, fail output function ? synchronized switching with primary side ? soft start function ? maximum duty adjustment ? overcurrent limiting, overcurrent shutdown functions ? reverse current detection (only the ha16341nt/fp) ? light load detection ? ovp function ? vcc pin uvl function
ha16341nt/fp, ha16342nt/fp rev.1, jan. 2001, page 2 of 21 ordering information type no. package ha16341nt dp-24ts ha16342nt HA16341FP fp-26dt ha16342fp pin arrangement 1 2 3 4 5 7 8 9 10 11 6 tab 12 cf(+) cf( ? ) cfo cfb ein mf out vcc mr out pwm out hsp eout pgnd vref 24 23 22 21 20 18 17 16 15 14 19 tab 13 cs(+) cs( ? ) mt cb cin sgnd pg1 fail trig ct ss pgnd db (top view) (top view) ha16341nt, ha16342nt (dp-24ts) HA16341FP, ha16342fp (fp-26dt) 1 2 3 4 5 8 9 10 11 12 6 tab 13 cf(+) cf( ? ) cfo cfb ein mf out vcc mr out pwm out hsp eout pgnd vref 26 25 24 23 22 19 18 17 16 15 21 20 tab 14 cs(+) cs( ? ) mt cb cin sgnd 7 pgnd pgnd pg1 fail trig ct ss pgnd db ha16341nt/fp, ha16342nt/fp rev.1, jan. 2001, page 3 of 21 pin functions pin no. dp-24ts fp-26dt symbol pin name 1 1 cs(+) current sense amp input (+) 22cs( ? ) current sense amp input ( ? ) 3 3 mt current sense amp output 4 4 cb current bus output 5 5 cin line resistance compensation input 6 6 sgnd signal ground 7 8 pg1 remote on/off 8 9 fail fail output (open-drain) 9 10 trig external synchronization input 10 11 ct timing capacitance 11 12 ss soft start 12 13 db dead band 13 14 vref vref (5 v) 14 15 hsp hot swap output 15 16 pwm out pwm output 16 17 mr out mr output 17 18 vcc power supply voltage 18 19 mf out mf output 19 21 eout error amp output 20 22 ein error amp input 21 23 cfb current share feedback output 22 24 cfo current share differential amp output 23 25 cf( ? ) current share differential amp input ( ? ) 24 26 cf(+) current share differential amp input (+) tab tab, 7, 20 pgnd power ground ha16341nt/fp, ha16342nt/fp rev.1, jan. 2001, page 4 of 21 block diagram ? + op1 19r 26db 6db 0db 1.187v e/in ocl point b current share input to latch b reset r r pg1 r tab ein eout cfb cf(+) cf( ? ) mf out vcc mr out db pg1 cfo pgnd fail unit r: ? c: f cs(+) cs( ? ) mt cb cin sgnd hsp pwm out vref ss ct pgnd trig start-up latch initial: lo start-up latch initial: hi db generator e/in = 95% comp. error amp. reverse current comp. (only ha16341) ocl ovp uvl1 fail ss comp. rs-ff rs-ff 939 a 169 a sw1 sw1 on: 1.3v sw1 off: 3.4v uvl2 exit trigger control oscillator dead band adjust light load detector ? + op6 ? + op2 ? + op1-2 ? + ? + tab op3 ? + op4 ? + ? + ct level compression ct' + ? + latch a s q r rs-ff latch b s q r latch c s r q q latch d s r q q ? 12mv cs(+) 1.25v from b ? + 2.5v vref 5v vref 5v hi: stop 100k from trig driver driver 128.5k delay ? + ? + ? + vref uvl2 1.25v hi: 0.7v lo: 0.5v hi: pwm on 2r r v z = 6.8v pg1 + ? 7.5v + ? + ? hi: 2.5v lo: 2.0v 1.25v 1.25v ? + + ? op5 0db v z = 1.24v 50k 10k 90k r r 1k 1k r + ? 20db 2r 2r 2r 2r driver driver s1 s2 16 pulse delay sw2 on at hsp hi sw2 ha16341nt/fp, ha16342nt/fp rev.1, jan. 2001, page 5 of 21 absolute maximum ratings (ta = 25 c) item symbol rating unit note supply voltage vcc 18 v dc output current1 io1 0.1 a pwm out * 1 peak output current1 iopeak1 1.0 a pwm out * 2 dc output current2 io2 0.2 a mf out * 1 peak output current2 iopeak2 2.0 a mf out * 2 dc output current3 io3 0.1 a mr out * 1 peak output current3 iopeak3 1.0 a mr out * 2 dc output current4 io4 ? 5macb out dc output current5 io5 500 acfb out dc output current6 io6 20 ma fail out dc output current7 io7 ? 5.0 ma vref out peak output current4 iopeak4 0.5 a hsp sink dc output current8 io8 500 amt out dc output current9 io9 500 acfo out dc output current10 io10 6 ma eout sink trig terminal voltage vtrigmax ? 1.5 to v cc v ct terminal voltage vctmax ? 0.3 to vref v vref terminal voltage vrefmax ? 0.3 to vref v ss terminal voltage vssmax ? 0.3 to vref v ein terminal voltage veinmax ? 0.3 to vref v eout terminal voltage veoutmax ? 0.3 to v cc v pg1 terminal voltage vpg1max ? 0.3 to vref v fail terminal voltage vfailmax ? 0.3 to v cc v pwm out terminal voltage vopwmmax ? 0.3 to v cc v mr out terminal voltage vomrmax ? 0.3 to v cc v mf out terminal voltage vomfmax ? 0.3 to v cc v hsp terminal voltage vohspmax ? 0.3 to v cc v cfb terminal voltage vcfbmax ? 0.3 to vref v cs(+) terminal voltage vcs(+)max ? 0.3 to vref v cs( ? ) terminal voltage vcs( ? )max ? 0.3 to vref v mt terminal voltage vmtmax ? 0.3 to vref v cin terminal voltage vcinmax ? 0.3 to vref v notes: 1. v ds = 10 v max. therefore test condition must be v oh = v cc ? 10 v or over , v ol = 10 v or under. 2. v ds = 10 v max. pulse duration 10 ms ha16341nt/fp, ha16342nt/fp rev.1, jan. 2001, page 6 of 21 absolute maximum ratings (cont.) (ta = 25 c) item symbol rating unit note cf(+) terminal voltage vcf(+)max ? 0.3 to vref v cf( ? ) terminal voltage vcf( ? )max ? 0.3 to vref v cfo terminal voltage vcfomax ? 0.3 to vref v cb terminal voltage vcbmax ? 0.3 to vref v db terminal voltage vdbmax ? 0.3 to vref v maximum power dissipation p t 4.17 w 1 operating temperature topr ? 40 to +105 c storage temperature tstg ? 55 to +150 c junction temperature tj 150 c note: 1. this is allowable value up to ta = 25 c. derate by j-a = 30 c/w above that temperature. j-a = 30 c/w is the case that ha16341nt is mounted on 30% wiring density glass epoxy board (105 mm 76.2 mm 1.6 mmt) and HA16341FP is mounted on a board which thermal resistance is 23 c/w because of j-pin (sop) = 7 c/w typ. 5.0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.17 4.5 maximum power dissipation p t (w) ambient temperature ta ( c) ? 50 ? 30 ? 10 170 150 130 110 90 70 50 30 10 figure 1 derating curve ha16341nt/fp, ha16342nt/fp rev.1, jan. 2001, page 7 of 21 electrical characteristics (ta = 25 c, v cc = 12v, pg1 = 3v, vtrig = 0v, vcs(+) = 0v, vcin = 0v, cct = 330pf, gvop1 = 26db, gvop4 = 40db, rdb = 1.8k ? ) ? current share item symbol min typ max unit test conditions note cb output hi voltage vcbh 2.5 ?? v iosource = 300 a vcs(+) = 1v cb output lo voltage vcbl ?? 25 mv vcs(+) = 0v, rcb = 10k ? cfb output lo voltage vcfbl ?? 100 mv iosink = 100 a, hsp on vcs(+) = 0v, vcb = 0.1v cfb output typ voltage vcfbtyp 1.19 1.25 1.31 v vcs(+) = 0v, vcb = 0v rfop4 = 1k ? , hsp on op1 input offset voltage vioop1 ?? (1) mv 1 cs(+) input bias current iibcs(+) ?? 20 ? 30 a vcs(+) = 0v, vcs( ? ) = 0v cs( ? ) input bias current iibcs( ? ) ? 0.2 1.0 a vcs(+) = 0v, vcs( ? ) = 0v cin input bias current iibcin ? 0.2 1.0 a vcin = 0v op4 input resistance rsin 0.75 1.00 1.25 k ? 1, 2 open loop gain op1 ? op6 avo (70) 80 ? db 1 band width op1 ? op6 bwcs ? 700 ? khz 1 ocl detector threshold voltage vthocl 59.5 62.5 65.5 mv cs(+) terminal voltage sensing light load detector threshold hi voltage vthhll (2.0) 3.5 (5.0) mv cs(+) terminal voltage sensing 1 light load detector threshold lo voltage vthlll (1.0) 2.5 (4.0) mv cs(+) terminal voltage sensing 1 vthll hysteresis dvthll (0.5) 1.0 (1.5) mv 1 reverse current detector threshold hi voltage vthrc ? 6 ? 12 ? 18 mv cs(+) terminal voltage sensing 3 notes: 1. design spec. 2. temperature coefficient is 5400ppm/ c. 3. only ha16341nt/fp. ? hot swap item symbol min typ max unit test conditions note hsp on threshold voltage vthhsp 1.14 1.19 1.23 v 95% typ of reference 1.25v hsp charge current ichsp ? 7 ? 10 ? 13 a vhsp = 5v, vein = 2v hsp output lo voltage volhsp ? 0.3 0.6 v vein = 1v, iosink = 50ma ha16341nt/fp, ha16342nt/fp rev.1, jan. 2001, page 8 of 21 electrical characteristics (cont.) (ta = 25 c, v cc = 12v, pg1 = 3v, vtrig = 0v, vcs(+) = 0v, vcin = 0v, cct = 330pf, gvop1 = 26db, gvop4 = 40db, rdb = 1.8k ? ) ? oscillator item symbol min typ max unit test conditions note typical oscillating frequency fosctyp 180 200 220 khz 10% maximum oscillating frequency foscmax 400 ?? khz typical oscillating temperature stability dfosc ? 5 ? % ? 20 c < ta < 85 c1 ct charge current ici ? 135 ? 169 ? 203 a 20% ct discharge current icd 616 770 924 a 20% upper trip point vthcth ? 3.4 ? v2 lower trip point vthctl ? 1.3 ? v amplitude dvct ? 2.1 ? v exit trigger vth vthtrig ? 0.3 ? 0.5 ? 0.7 v notes: 1. design spec. 2. in case of external trigger control, cct should be changed from 330 pf to 430 pf. at this synchronous and 430 pf cct condition vthcth becomes about 2.9 v. ? vref item symbol min typ max unit test conditions note reference voltage vref 4.9 5.0 5.1 v iosource = 1ma 2% line regulation vref-line ? 5 20 mv iosource = 1ma 12v < v cc < 18v load regulation vref-load ? 5 20 mv 0 < iosource < 3ma temperature stability dvref ? 80 ? ppm/ c ? 20 c < ta < 85 c1 note: 1. design spec. ? uvl item symbol min typ max unit test conditions note hi threshold voltage vh 9.5 10.0 10.5 v lo threshold voltage vl 8.5 9.0 9.5 v hysteresis dvuvl 0.6 1.0 1.4 v ha16341nt/fp, ha16342nt/fp rev.1, jan. 2001, page 9 of 21 electrical characteristics (cont.) (ta = 25 c, v cc = 12v, pg1 = 3v, vtrig = 0v, vcs(+) = 0v, vcin = 0v, cct = 330pf, gvop1 = 26db, gvop4 = 40db, rdb = 1.8k ? ) ? pg1 item symbol min typ max unit test conditions note pg1 threshold hi voltage vthhpg1 2.4 2.5 2.6 v pg1 threshold lo voltage vthlpg1 1.9 2.0 2.1 v input impedance rinpg1 (37.5) 50.0 (62.5) k ? 1 note: 1. design spec. ? fail item symbol min typ max unit test conditions note leak current ileakfail ??? 10 avfail = 5v output lo voltage volfail ?? 0.5 v iosink = 10ma ? error amp. item symbol min typ max unit test conditions note input threshold voltage vthein 1.23 1.25 1.27 v veout = 1.25v 1.6% input bias current iibein ?? 0.2 ? 2.0 avein = 2v open loop gain avoea 60 80 ? db band width bwea (0.7) 1.4 ? mhz 1 eout sink current iosinkea 0.5 5.0 ? ma vein = 1.5v, eout = 1.1v eout source current iosourceea ? 100 ? 250 ? a vein = 1.0v, eout = 5v eout clamp voltage vohea 5.8 6.8 7.8 v vein = 1.0v eout lo voltage volea ?? 1.0 v vein = 1.5v, iosink = 200 a note: 1. design spec. ? pwm out item symbol min typ max unit test conditions note output lo voltage volpwm ? 0.2 0.4 v iosink = 100ma output hi voltage vohpwm v cc ? 0.4 v cc ? 0.2 ? v iosource = 100ma rise time trpwm 20 50 100 ns cl = 3300pf fall time tfpwm 20 50 100 ns cl = 3300pf maximum duty dmax 58 65 72 % vss = 4v, vein = 1.0v minimum duty dmin ?? 0 % vss = 4v, vein = 1.5v note: 1. design spec. ha16341nt/fp, ha16342nt/fp rev.1, jan. 2001, page 10 of 21 electrical characteristics (cont.) (ta = 25 c, v cc = 12v, pg1 = 3v, vtrig = 0v, vcs(+) = 0v, vcin = 0v, cct = 330pf, gvop1 = 26db, gvop4 = 40db, rdb = 1.8k ? ) ? mr out item symbol min typ max unit test conditions note output lo voltage volmr ? 0.2 0.4 v iosink = 100ma output hi voltage vohmr v cc ? 0.4 v cc ? 0.2 ? v iosource = 100ma rise time trmr 20 50 100 ns cl = 3300pf fall time tfmr 20 50 100 ns cl = 3300pf ? mf out item symbol min typ max unit test conditions note output lo voltage volmf ? 0.2 0.4 v iosink = 200ma output hi voltage vohmf v cc ? 0.4 v cc ? 0.2 ? v iosource = 200ma rise time trmf 20 50 100 ns cl = 6000pf fall time tfmf 20 50 100 ns cl = 6000pf ? dead band time item symbol min typ max unit test conditions note dead band time1 td1typ 0 50 100 ns rdb = 1.8k ? dead band time2 td2typ 0 100 200 ns rdb = 1.8k ? mr to mf delay time t1 ( ? 20) ? (50) ns t1 = mf off ? mr on 1 pwm to mr delay time t2 ( ? 20) ? (50) ns t2 = mr off ? pwm off 1 mr delay time t3 ? 1 ? s t3 = ct low trip point ? mr on 1 maximum dead band adjust time1 tdadj1 ? td1typ +300 ? ns rdb = 47k ? 1 maximum dead band adjust time2 tdadj2 ? td2typ +600 ? ns rdb = 47k ? 1 note: 1. design spec. measurement is 50% slice point. ha16341nt/fp, ha16342nt/fp rev.1, jan. 2001, page 11 of 21 electrical characteristics (cont.) (ta = 25 c, v cc = 12v, pg1 = 3v, vtrig = 0v, vcs(+) = 0v, vcin = 0v, cct = 330pf, gvop1 = 26db, gvop4 = 40db, rdb = 1.8k ? ) ? ss item symbol min typ max unit test conditions note ss sink current idss 500 ?? a pg1 = 2v, vss = 2v ? ovp item symbol min typ max unit test conditions note ovp latch voltage vovp 6.5 7.5 8.5 v ? current consumption item symbol min typ max unit test conditions note operating current icc 5.4 7.4 9.4 ma vct = 1v standby current istby ? 200 600 a vcc = 8v, pg1 = 0v ha16341nt/fp, ha16342nt/fp rev.1, jan. 2001, page 12 of 21 timing chart 1 (total) vcc vref (5v typ) pg1 (by switch) uvl2 (internal) ss ct out (pwm) ein out (hsp) note: 1. the output of pwm, mr and mf do not appear in the first period of ct cycle due to start-up latch circuit. uvl1 hi 10.0v typ uvl1 lo 9.0v typ uvl2 threshold 4.6v typ 0v 0v 0v 0v 0v 0v 0v 0v 0v 3v vth cth : 3.4v typ vth ctl : 1.3v typ 1.25v (100%) 1.187v (95%) on off on note 1 ha16341nt/fp, ha16342nt/fp rev.1, jan. 2001, page 13 of 21 timing chart 2 (hot swap) pg1 uvl2 (internal) ein internal latch signal : node s2 in block diagram hsp out note: reverse current is ha16341nt/fp only. internal latch signal (inverting) (ovp, ocl or reverse current) : node s1 in block diagram 0v 3v 0v 0v 0v 0v 0v 1.25v (100%) 1.187v (95%) gate charging by 10 a source current gate discharging by 0.5a max sink current vref 0v set reset ha16341nt/fp, ha16342nt/fp rev.1, jan. 2001, page 14 of 21 timing chart 3 (dead band control) td1 ct pwm out mr out mf out v ss t3 t2 td1, td2 (ns) 0 800 600 400 200 700 500 300 100 td2 vref db ha16341 r db 050 40 30 r db (k ? ) 20 10 note: v ss determines maximum duty. this waveform example shows the case of ein = lo. v ss : voltage of ss pin t1 td1 td2 ha16341nt/fp, ha16342nt/fp rev.1, jan. 2001, page 15 of 21 timing chart 4 (soft start) ct ss out (pwm) vth cth : 3.4v note * vth ctl : 1.3v note: self-oscillation: vth cth = 3.4v typ synchronized operation: vth cth = 2.9v typ case v hss vth cth maximum duty would be the value specified in page 9. case v hss < vth cth maximum duty decrease to the corresponding value. please refer to formula 1 as design value of maximum duty. max duty = (tss ? 0.63 s ? td1) operating frequency ? ? ? ? ? formula 1 tss = ici c ct vth cth vth ctl : ct charge current : ct terminal capacitor : ct upper trip point : ct lower trip point (v hss ? vth ctl ) c ct ici select values r1, r2 and c1 for suitable maximum duty and ss time constant. ss ss ct vref (5v) ss ha16341 c figure a. ss terminal application r1 r2 r1 + r2 r1 r2 c1 vhss = vref (5v) r2 r1 + r2 ha16341nt/fp, ha16342nt/fp rev.1, jan. 2001, page 16 of 21 timing chart 5 (external trigger control) primary ic oscillation primary ic aux-out trigger input (trig terminal) trigger detector internal signal secondary oscillation trigger vth vtrig: ? 0.5v typ 0v 0v 0v 0v 0v primary primary ic aux-out secondary vth cth = about 2.9v @cct = 430pf this ic is triggered by negative pulse. r1 and r2 must be calculated including internal impedance of 230k ? . vref (5v) trig ha16341 figure b. external trigger application r1 r2 230k ha16341nt/fp, ha16342nt/fp rev.1, jan. 2001, page 17 of 21 timing chart 6 (duty control) ct' + vo op1-2 (internal) 1/3 (eout ? 2v be ) (internal) ct' + vo op1-2 300mv 1/3 (eout ? 2v be ) 1/3 (eout ? 2v be ) 1.24v clamp out (pwm) 5.26v 300mv no output area vo op1-2 (v) 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.1 1.3 1.24 1.2 1.0 veout (v) 0 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3.0 3.3 3.6 3.9 4.2 4.5 4.8 5.1 5.4 5.7 0.6 0.3 duty control area in case of 50% max duty max duty area 1.54v 2.44v ct' = the amplitude of ct' is 300mv typ at synchronous operation with trigger frequency as 200khz and c ct = 430pf. ct 5.33 ha16341nt/fp, ha16342nt/fp rev.1, jan. 2001, page 18 of 21 timing chart 7 (current limitting) ct' + vo op1-2 (internal) 1/3 (eout ? 2v be ) = 1.24v clamped (internal) out (pwm) 300mv pwm on duty (%) 70 60 50 40 cs(+) (mv) 20 30 0 70 50 20 60 40 30 10 c ct = 430pf, r db = 1.8k ? , v hss = 4v synchronized operation with 200khz ct' = the amplitude of ct' is 300mv typ at synchronous operation with trigger frequency as 200khz and c ct = 430pf. ct 5.33 ha16341nt/fp, ha16342nt/fp rev.1, jan. 2001, page 19 of 21 timing chart 8 (interface with primary control ic) vref pg1 (from primary ic) uvl2 (internal signal) out (pwm) fail (to primary ic) internal latch signal (inverting) (ovp, ocl or reverse current) : node s1 in block diagram set reset note: reverse current is ha16341nt/fp only. ha16341nt/fp, ha16342nt/fp rev.1, jan. 2001, page 20 of 21 package dimensions hitachi code jedec eiaj mass (reference value) dp-24ts ? ? 2.04 g 0.25 1 ? 13 + 0.10 ? 0.05 5.06 max 10.16 2.54 min 0.51 min 1 12 13 24 27.10 28.10 max 1.0 8.8 10.0 max 1.78 0.25 4.04 0.20 0.48 0.10 1.5 max as of january, 2001 unit: mm hitachi code jedec eiaj mass (reference value) fp-26dt ? ? 0.98 g *dimension including the plating thickness base material dimension 0.16 0.10 18.4 19.2 max *0.37 0.08 2.8 3.6 8.3 3.0 max 0.10 + 0.15 ? 0.10 m 26 14 1 13 0.80 *0.32 0.07 10.93 + 0.15 ? 0.25 0 ? 8 0.70 + 0.15 ? 0.20 1.315 1.20 max 0.35 0.06 0.30 0.05 as of january, 2001 unit: mm ha16341nt/fp, ha16342nt/fp rev.1, jan. 2001, page 21 of 21 disclaimer 1. hitachi neither warrants nor grants licenses of any rights of hitachi?s or any third party?s patent, copyright, trademark, or other intellectual property rights for information contained in this document. hitachi bears no responsibility for problems that may arise with third party?s rights, including intellectual property rights, in connection with use of the information contained in this document. 2. products and product specifications may be subject to change without notice. confirm that you have received the latest product standards or specifications before final design, purchase or use. 3. hitachi makes every attempt to ensure that its products are of high quality and reliability. however, contact hitachi?s sales office before using the product in an application that demands especially high quality and reliability or where its failure or malfunction may directly threaten human life or cause risk of bodily injury, such as aerospace, aeronautics, nuclear power, combustion control, transportation, traffic, safety equipment or medical equipment for life support. 4. design your application so that the product is used within the ranges guaranteed by hitachi particularly for maximum rating, operating supply voltage range, heat radiation characteristics, installation conditions and other characteristics. hitachi bears no responsibility for failure or damage when used beyond the guaranteed ranges. even within the guaranteed ranges, consider normally foreseeable failure rates or failure modes in semiconductor devices and employ systemic measures such as fail- safes, so that the equipment incorporating hitachi product does not cause bodily injury, fire or other consequential damage due to operation of the hitachi product. 5. this product is not designed to be radiation resistant. 6. no one is permitted to reproduce or duplicate, in any form, the whole or part of this document without written approval from hitachi. 7. contact hitachi?s sales office for any questions regarding this document or hitachi semiconductor products. sales offices |
Price & Availability of HA16341FP
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |