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MOC3021-M
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MOC3021-M - - -

Pinout/Connection Diagram

moc3021-m Circuit
One of the control circuit's triacs selects the tap on main transformer T1, which provides the proper, preregulated voltage to the secondary regulator. T2 and its associated components comprise the second-ary regulator.

The ADO 0804, IC1, digitizes a voltage-feedback signal from the secondary regulator's output. The MC1415 demultiplexer, IC2, decodes the digitizer's output. IC2, in turn, drives T1's optoisolated triacs via the 74LS240 driver chip, IC3, and associated optoisolators.

Transformer T3 samples the circuit's current output. The auxiliary, 12 V winding on T1 ensures no-load starting. The combination of op amp IC5 and the inverting transistor, Q1, square this current signal. The output of Q1 is the CLK signal, which triggers one-half of the one shot, IC4A, to begin the circuit's A/D conversion. The one shots' periods are set to time out within 1/2 cycle of the ac input.

Upon completion of its A/D conversion, IC1's INTR output triggers the other half of the one shot, IC4B, which enables the converter's data outputs. The rising edge of the CLK signal resets the one shot and latches the new conversion value into IC2. The latch, associated driver, and optoisolator trigger a selected triac according to the latest value of the voltage-feedback signal, VO.

Supplier

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  Part Number Mfg Pack D/C Qty Note
MOC3021-M FSC 10 9000 Original Part
  SCYLLA POWER H.K. LIMITED Hong Kong
Contact: Mr. jack   MSN:daniel@scyllapower.com Tel: 86-755-84157780 Fax: 86-755-84708330
MOC3021-M QT/FSC 100000
  Hendary Tech(HK) Co., Limited China (Mainland)
Contact: Mr. Tony   MSN:tony-hun@hotmail.com Tel: +86-755-82862373 Fax: +86-755-82810121
MOC3021-M FATRCHILD SOIC-6 15000 New and original sample can be provided
  UNION TECHNOLOGY (HK) TRADING COMPANY LIMITED China (Mainland)
Contact: Mr. Kevin   MSN:union-hk@live.com Tel: 0086-755-82813231/ 82813232 Fax: 0086-755-82813230
MOC3021-M FSC 09+ 3101
  HK GREAT WORLD TEDCHNOLOGY LIMITED Hong Kong
Contact: Mr. T T   MSN:dengziDIY@hotmail.com Tel: 86-0755-88307817 Fax: 86-0755-88307181
MOC3021-M FSC DIP 09+ 30000 new
  Gran Electronics Technology Co.,Ltd China (Mainland)
Contact: Mr. Shepherd   MSN:sales@granelectronicstech.com Tel: 86-755-23815981 Fax: 86-755-23940631
MOC3021-M 1200
  Kingwin Tech.Co.,Limited China (Mainland)
Contact: Mr. Roymand   MSN:kingwintech@hotmail.com Tel: 86-755-33171721 Fax: 86-755-33171721
MOC3021-M FATRCHILD N/A 0505+ 17500 New & original, stock offer
  TONGGUANG (H.K.) ELECTRICS CO., LIMITED China (Mainland)
Contact: Mr. james   MSN:james_123lin@hotmail.com,SKYPE:wondle Tel: +86-755-23932235 Fax: +86-755-83996795
MOC3021-M QT/FSC 100000
  E-Chips Solution Co.,LTD Hong Kong
Contact: Ms. Antonia Leung   MSN:antonia7020@hotmail.com Tel: 86-755-61358345 Fax: 86-755-83793928
MOC3021-M Fairchild N/A 09+ 20000 SUNON'S STOCK
  SUNON(HK) SEMICON CO.,LTD Hong Kong
Contact: Mr. Rick Lin   MSN:sun789@msn.cn Tel: 86-755-82811600 Fax: 86-755-83985387
MOC3021-M FAIRCHIL DIP 05+ 20000PCS
  Aosiwei Commercial & Trade Co., Ltd. China (Mainland)
Contact: Ms. Sophia   MSN:aosi@vip.163.com Tel: 86-755-83019442 Fax: 86-755-83019443
MOC3021-M FAIRCHIL DIP 05+ 20000PCS
  Hongkong Kaiyuwei Trading Company China (Mainland)
Contact: Ms. Lisa   MSN:lisa.kyw@hotmail.com Tel: 86-755-36931142 Fax: 86-755-83869906
MOC3021-M Fairchild DIP 10+ 1947
  Winsome Holding (HK) Group Company Limited Hong Kong
Contact: Mr. Ho   MSN:hkwinsome@hotmail.com Tel: +86-755-82807955 Fax: +86-755-83234025
MOC3021-M FAIRCHILD DIP 09+ 10000 new original part in stock.
  Sky Far Electronics Hong Kong Co., Ltd Hong Kong
Contact: Ms. Resa   MSN:sales-1@skyfar-ic.com Tel: 00-852-5103-5561-801 Fax: 00-852-3059-1919
MOC3021-M FAIRCHIL 07+ 20000 Cheeda stock ,new and original
  Cheeda Electronics (HK) Co., Ltd. China (Mainland)
Contact: Mr. SUN H   MSN:cheedaelectronics@hotmail.com Tel: 86-755-89922039 Fax: 86-755-89922039
MOC3021-M FAIRCHIL 07+ 5800 NEW ORIGINAL,SAMPLES AVAILABLE.WELCOME INQUIRY. E-MAIL:joy.kaino@gmail.com
  VICKO(HK)ELECTRONICS TECHNOLOGY CO.,LTD China (Mainland)
Contact: Mr. ken   MSN:yang.kaino@hotmail.com Tel: 86-755-82514990 Fax: 86-755-83294692
MOC3021-M News & Original 07+ 5000 Available Stock
  XGF ELECTRONIC COMPONENTS LIMITED  China (Mainland)
Contact: Mr. Frank Lau   MSN:franklmk168@live.cn skype: franklmk168 Tel: 0086-755-83576094 Fax: 0086-755-83576061
MOC3021-M FCS DIP 10+ 10000 STOCK AND ORIGINAL
  kingshine(hk)electronic co.,ltd. China (Mainland)
Contact: Mr. Joe Hong   MSN:joehong102@hotmail.com Tel: 86-755-83958561 Fax: 86-755-83958652
MOC3021-M FSC 50 10 3,000 DIP
  HK INNOVATE INTERNATIONAL CO.,LTD Hong Kong
Contact: Mr. Sam   MSN:ljscollege@163.com Tel: 86-755-29187483 Fax: 86-755-28540099
MOC3021-M FSC 07+ 10000 100%original,new inhand.superiority
  zorbo(Hong Kong) Electronics Co., Ltd. China (Mainland)
Contact: Mr. Lin   MSN:zobelec@hotmail.com Tel: 086-0755-82579232 Fax: 086-0755-82579232
MOC3021-M Fairchi 12000
  New star advance co.,ltd Hong Kong
Contact: Mr. MICHAEL   MSN:nsadvance1@hotmail.com Tel: 86-755-83216997 Fax: 86-755-61309242
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PDF / Datasheet

MOC3021-M PDF Download

MOC3021-M

File Size: 534356 KB
Manufacturer: FAIRCHILD

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