Diode datasheet reading The 2019 Stack Overflow Developer Survey Results Are Inrectenna, diode selectionReading Diode DatasheetTrying to understand flyback diodes and general diode orientationConstant Voltage model pf Diode circuit analysisWhat is the difference between rectifier/signal diode and zener diode?Should a freewheeling (flyback) diode be used on the coil of a 2-coil latching relay?Rectifiers parametersDifferent Zener Diode SymbolsOutput rectifying diode burning up in LED driverCan I buy an ideal diode? How do I OR two power supplies togetherDiode Array for Full-Wave Rectifier for PoE

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Diode datasheet reading



The 2019 Stack Overflow Developer Survey Results Are Inrectenna, diode selectionReading Diode DatasheetTrying to understand flyback diodes and general diode orientationConstant Voltage model pf Diode circuit analysisWhat is the difference between rectifier/signal diode and zener diode?Should a freewheeling (flyback) diode be used on the coil of a 2-coil latching relay?Rectifiers parametersDifferent Zener Diode SymbolsOutput rectifying diode burning up in LED driverCan I buy an ideal diode? How do I OR two power supplies togetherDiode Array for Full-Wave Rectifier for PoE



.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty margin-bottom:0;








3












$begingroup$


What is difference between single and common cathode configuration? If I want to use 2804 for rectifying, will it act as 2800?



enter image description here



HSMS2800 https://datasheet.octopart.com/HSMS-2800-BLKG-Avago-datasheet-7087620.pdf










share|improve this question











$endgroup$


















    3












    $begingroup$


    What is difference between single and common cathode configuration? If I want to use 2804 for rectifying, will it act as 2800?



    enter image description here



    HSMS2800 https://datasheet.octopart.com/HSMS-2800-BLKG-Avago-datasheet-7087620.pdf










    share|improve this question











    $endgroup$














      3












      3








      3





      $begingroup$


      What is difference between single and common cathode configuration? If I want to use 2804 for rectifying, will it act as 2800?



      enter image description here



      HSMS2800 https://datasheet.octopart.com/HSMS-2800-BLKG-Avago-datasheet-7087620.pdf










      share|improve this question











      $endgroup$




      What is difference between single and common cathode configuration? If I want to use 2804 for rectifying, will it act as 2800?



      enter image description here



      HSMS2800 https://datasheet.octopart.com/HSMS-2800-BLKG-Avago-datasheet-7087620.pdf







      diodes rectifier






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited Apr 4 at 14:07







      Max Rock

















      asked Apr 4 at 14:04









      Max RockMax Rock

      497




      497




















          2 Answers
          2






          active

          oldest

          votes


















          6












          $begingroup$

          A 2804 is two 2800's, with their cathodes connected together, put in the same package. You could just use one of them, or you could use both in parallel.






          share|improve this answer









          $endgroup$












          • $begingroup$
            That means, if I do not solder one of two terminal side of 2804 diode, it will act as 2800. Am I right?
            $endgroup$
            – Max Rock
            Apr 4 at 14:53










          • $begingroup$
            These are not power diodes, only small signal, for low current<5mA use. Do you understand Max?
            $endgroup$
            – Sunnyskyguy EE75
            Apr 4 at 15:02










          • $begingroup$
            @SunnyskyguyEE75 I am working on project related to rectenna. According to many researches I looked through, mostly used diodes were HSMS 28xx family. I am stuck on choosing right diodes. Most diodes of HSMS 28xx family are obsolete. That is why I am looking for trade-off. What I found HSMS 2804 was not out of stock.
            $endgroup$
            – Max Rock
            Apr 4 at 15:35










          • $begingroup$
            @SunnyskyguyEE75 a bit different question, more broadly about my problem I posted here(electronics.stackexchange.com/questions/428821/…)
            $endgroup$
            – Max Rock
            Apr 4 at 15:42











          • $begingroup$
            hmm that schematic does not reflect your readings. "circuit gave output 14.5V and 45uA on 200 Ohms load." does not make sense. 45uA on 200 Ohms is 9mV
            $endgroup$
            – Sunnyskyguy EE75
            Apr 4 at 15:48


















          2












          $begingroup$

          As you can see in the table, every package has identical single diode specifications.



          But your question is "If I want to use 2804 for rectifying, will it act as 2800?"



          The temperature rise will be double sharing one package for two diodes.



          Answer: Yes for peak currents <=1mA
          No , if near Ip=10mA do not use if temp rise exceeds 70'C above worst case board temp.



          Although they have identical characteristics, now it means the dual diode package must share the same thermal resistance of;

          500°C/W for SOT-23 and 150°C/W for SOT-323



          You must work out the temp rise, but it means your DC load must be << 1mA since the diode peak current into a storage cap with 10% ripple will be 10mA






          share|improve this answer











          $endgroup$













            Your Answer





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            2 Answers
            2






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            2 Answers
            2






            active

            oldest

            votes









            active

            oldest

            votes






            active

            oldest

            votes









            6












            $begingroup$

            A 2804 is two 2800's, with their cathodes connected together, put in the same package. You could just use one of them, or you could use both in parallel.






            share|improve this answer









            $endgroup$












            • $begingroup$
              That means, if I do not solder one of two terminal side of 2804 diode, it will act as 2800. Am I right?
              $endgroup$
              – Max Rock
              Apr 4 at 14:53










            • $begingroup$
              These are not power diodes, only small signal, for low current<5mA use. Do you understand Max?
              $endgroup$
              – Sunnyskyguy EE75
              Apr 4 at 15:02










            • $begingroup$
              @SunnyskyguyEE75 I am working on project related to rectenna. According to many researches I looked through, mostly used diodes were HSMS 28xx family. I am stuck on choosing right diodes. Most diodes of HSMS 28xx family are obsolete. That is why I am looking for trade-off. What I found HSMS 2804 was not out of stock.
              $endgroup$
              – Max Rock
              Apr 4 at 15:35










            • $begingroup$
              @SunnyskyguyEE75 a bit different question, more broadly about my problem I posted here(electronics.stackexchange.com/questions/428821/…)
              $endgroup$
              – Max Rock
              Apr 4 at 15:42











            • $begingroup$
              hmm that schematic does not reflect your readings. "circuit gave output 14.5V and 45uA on 200 Ohms load." does not make sense. 45uA on 200 Ohms is 9mV
              $endgroup$
              – Sunnyskyguy EE75
              Apr 4 at 15:48















            6












            $begingroup$

            A 2804 is two 2800's, with their cathodes connected together, put in the same package. You could just use one of them, or you could use both in parallel.






            share|improve this answer









            $endgroup$












            • $begingroup$
              That means, if I do not solder one of two terminal side of 2804 diode, it will act as 2800. Am I right?
              $endgroup$
              – Max Rock
              Apr 4 at 14:53










            • $begingroup$
              These are not power diodes, only small signal, for low current<5mA use. Do you understand Max?
              $endgroup$
              – Sunnyskyguy EE75
              Apr 4 at 15:02










            • $begingroup$
              @SunnyskyguyEE75 I am working on project related to rectenna. According to many researches I looked through, mostly used diodes were HSMS 28xx family. I am stuck on choosing right diodes. Most diodes of HSMS 28xx family are obsolete. That is why I am looking for trade-off. What I found HSMS 2804 was not out of stock.
              $endgroup$
              – Max Rock
              Apr 4 at 15:35










            • $begingroup$
              @SunnyskyguyEE75 a bit different question, more broadly about my problem I posted here(electronics.stackexchange.com/questions/428821/…)
              $endgroup$
              – Max Rock
              Apr 4 at 15:42











            • $begingroup$
              hmm that schematic does not reflect your readings. "circuit gave output 14.5V and 45uA on 200 Ohms load." does not make sense. 45uA on 200 Ohms is 9mV
              $endgroup$
              – Sunnyskyguy EE75
              Apr 4 at 15:48













            6












            6








            6





            $begingroup$

            A 2804 is two 2800's, with their cathodes connected together, put in the same package. You could just use one of them, or you could use both in parallel.






            share|improve this answer









            $endgroup$



            A 2804 is two 2800's, with their cathodes connected together, put in the same package. You could just use one of them, or you could use both in parallel.







            share|improve this answer












            share|improve this answer



            share|improve this answer










            answered Apr 4 at 14:09









            Neil_UKNeil_UK

            78.9k285182




            78.9k285182











            • $begingroup$
              That means, if I do not solder one of two terminal side of 2804 diode, it will act as 2800. Am I right?
              $endgroup$
              – Max Rock
              Apr 4 at 14:53










            • $begingroup$
              These are not power diodes, only small signal, for low current<5mA use. Do you understand Max?
              $endgroup$
              – Sunnyskyguy EE75
              Apr 4 at 15:02










            • $begingroup$
              @SunnyskyguyEE75 I am working on project related to rectenna. According to many researches I looked through, mostly used diodes were HSMS 28xx family. I am stuck on choosing right diodes. Most diodes of HSMS 28xx family are obsolete. That is why I am looking for trade-off. What I found HSMS 2804 was not out of stock.
              $endgroup$
              – Max Rock
              Apr 4 at 15:35










            • $begingroup$
              @SunnyskyguyEE75 a bit different question, more broadly about my problem I posted here(electronics.stackexchange.com/questions/428821/…)
              $endgroup$
              – Max Rock
              Apr 4 at 15:42











            • $begingroup$
              hmm that schematic does not reflect your readings. "circuit gave output 14.5V and 45uA on 200 Ohms load." does not make sense. 45uA on 200 Ohms is 9mV
              $endgroup$
              – Sunnyskyguy EE75
              Apr 4 at 15:48
















            • $begingroup$
              That means, if I do not solder one of two terminal side of 2804 diode, it will act as 2800. Am I right?
              $endgroup$
              – Max Rock
              Apr 4 at 14:53










            • $begingroup$
              These are not power diodes, only small signal, for low current<5mA use. Do you understand Max?
              $endgroup$
              – Sunnyskyguy EE75
              Apr 4 at 15:02










            • $begingroup$
              @SunnyskyguyEE75 I am working on project related to rectenna. According to many researches I looked through, mostly used diodes were HSMS 28xx family. I am stuck on choosing right diodes. Most diodes of HSMS 28xx family are obsolete. That is why I am looking for trade-off. What I found HSMS 2804 was not out of stock.
              $endgroup$
              – Max Rock
              Apr 4 at 15:35










            • $begingroup$
              @SunnyskyguyEE75 a bit different question, more broadly about my problem I posted here(electronics.stackexchange.com/questions/428821/…)
              $endgroup$
              – Max Rock
              Apr 4 at 15:42











            • $begingroup$
              hmm that schematic does not reflect your readings. "circuit gave output 14.5V and 45uA on 200 Ohms load." does not make sense. 45uA on 200 Ohms is 9mV
              $endgroup$
              – Sunnyskyguy EE75
              Apr 4 at 15:48















            $begingroup$
            That means, if I do not solder one of two terminal side of 2804 diode, it will act as 2800. Am I right?
            $endgroup$
            – Max Rock
            Apr 4 at 14:53




            $begingroup$
            That means, if I do not solder one of two terminal side of 2804 diode, it will act as 2800. Am I right?
            $endgroup$
            – Max Rock
            Apr 4 at 14:53












            $begingroup$
            These are not power diodes, only small signal, for low current<5mA use. Do you understand Max?
            $endgroup$
            – Sunnyskyguy EE75
            Apr 4 at 15:02




            $begingroup$
            These are not power diodes, only small signal, for low current<5mA use. Do you understand Max?
            $endgroup$
            – Sunnyskyguy EE75
            Apr 4 at 15:02












            $begingroup$
            @SunnyskyguyEE75 I am working on project related to rectenna. According to many researches I looked through, mostly used diodes were HSMS 28xx family. I am stuck on choosing right diodes. Most diodes of HSMS 28xx family are obsolete. That is why I am looking for trade-off. What I found HSMS 2804 was not out of stock.
            $endgroup$
            – Max Rock
            Apr 4 at 15:35




            $begingroup$
            @SunnyskyguyEE75 I am working on project related to rectenna. According to many researches I looked through, mostly used diodes were HSMS 28xx family. I am stuck on choosing right diodes. Most diodes of HSMS 28xx family are obsolete. That is why I am looking for trade-off. What I found HSMS 2804 was not out of stock.
            $endgroup$
            – Max Rock
            Apr 4 at 15:35












            $begingroup$
            @SunnyskyguyEE75 a bit different question, more broadly about my problem I posted here(electronics.stackexchange.com/questions/428821/…)
            $endgroup$
            – Max Rock
            Apr 4 at 15:42





            $begingroup$
            @SunnyskyguyEE75 a bit different question, more broadly about my problem I posted here(electronics.stackexchange.com/questions/428821/…)
            $endgroup$
            – Max Rock
            Apr 4 at 15:42













            $begingroup$
            hmm that schematic does not reflect your readings. "circuit gave output 14.5V and 45uA on 200 Ohms load." does not make sense. 45uA on 200 Ohms is 9mV
            $endgroup$
            – Sunnyskyguy EE75
            Apr 4 at 15:48




            $begingroup$
            hmm that schematic does not reflect your readings. "circuit gave output 14.5V and 45uA on 200 Ohms load." does not make sense. 45uA on 200 Ohms is 9mV
            $endgroup$
            – Sunnyskyguy EE75
            Apr 4 at 15:48













            2












            $begingroup$

            As you can see in the table, every package has identical single diode specifications.



            But your question is "If I want to use 2804 for rectifying, will it act as 2800?"



            The temperature rise will be double sharing one package for two diodes.



            Answer: Yes for peak currents <=1mA
            No , if near Ip=10mA do not use if temp rise exceeds 70'C above worst case board temp.



            Although they have identical characteristics, now it means the dual diode package must share the same thermal resistance of;

            500°C/W for SOT-23 and 150°C/W for SOT-323



            You must work out the temp rise, but it means your DC load must be << 1mA since the diode peak current into a storage cap with 10% ripple will be 10mA






            share|improve this answer











            $endgroup$

















              2












              $begingroup$

              As you can see in the table, every package has identical single diode specifications.



              But your question is "If I want to use 2804 for rectifying, will it act as 2800?"



              The temperature rise will be double sharing one package for two diodes.



              Answer: Yes for peak currents <=1mA
              No , if near Ip=10mA do not use if temp rise exceeds 70'C above worst case board temp.



              Although they have identical characteristics, now it means the dual diode package must share the same thermal resistance of;

              500°C/W for SOT-23 and 150°C/W for SOT-323



              You must work out the temp rise, but it means your DC load must be << 1mA since the diode peak current into a storage cap with 10% ripple will be 10mA






              share|improve this answer











              $endgroup$















                2












                2








                2





                $begingroup$

                As you can see in the table, every package has identical single diode specifications.



                But your question is "If I want to use 2804 for rectifying, will it act as 2800?"



                The temperature rise will be double sharing one package for two diodes.



                Answer: Yes for peak currents <=1mA
                No , if near Ip=10mA do not use if temp rise exceeds 70'C above worst case board temp.



                Although they have identical characteristics, now it means the dual diode package must share the same thermal resistance of;

                500°C/W for SOT-23 and 150°C/W for SOT-323



                You must work out the temp rise, but it means your DC load must be << 1mA since the diode peak current into a storage cap with 10% ripple will be 10mA






                share|improve this answer











                $endgroup$



                As you can see in the table, every package has identical single diode specifications.



                But your question is "If I want to use 2804 for rectifying, will it act as 2800?"



                The temperature rise will be double sharing one package for two diodes.



                Answer: Yes for peak currents <=1mA
                No , if near Ip=10mA do not use if temp rise exceeds 70'C above worst case board temp.



                Although they have identical characteristics, now it means the dual diode package must share the same thermal resistance of;

                500°C/W for SOT-23 and 150°C/W for SOT-323



                You must work out the temp rise, but it means your DC load must be << 1mA since the diode peak current into a storage cap with 10% ripple will be 10mA







                share|improve this answer














                share|improve this answer



                share|improve this answer








                edited Apr 4 at 15:00

























                answered Apr 4 at 14:54









                Sunnyskyguy EE75Sunnyskyguy EE75

                71.2k227103




                71.2k227103



























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