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Hi everyone,
I won't bore you with background but I've been working on this for a long while and would love some feedback on it's efficacy.
It's the first major circuit project I've ever undertaken, you guys seem nice but still I'd appreciate if you could keep that in mind. As stated in the title It's a Daughterboard, meant to be a drop-in replacement of the power supply/rf Daughterboard of an original CPU-07 revision Nintendo Family Computer & replace it's rf av output with equivalent RCA composite signals for compatibility with north american televisions.
It comprises a buck converter power supply section, and an audio/video signal processing section to clean up and/or boost the signals for output to television. For technical details, the board is 4 layers, is limited in size to be 88 by 50 milimeters to fit within the original console's shell, the DC input and AV output connectors are fixed in position for the very same reason, is intended to ouput a signal compliant with north american CRT televisions etc
I'd like particularely like feedback in the following areas: the stability of the buck regulator layout and whether you feel placement of it's components are effective (please tell me where you would put them if you had feedback on this point), whether the av section is sufficiently noise-coupled, whther the av section is also properly buffered and has proper impedance, whether the board properly grounded where it needs to be, and whether you found anything to speak of DFM and manufacturability.
For checks i've already done: DFM checks have been passed, NPTH clearences have been verified, I have multiple dedicated ground planes, and feedback routing has been reviewed favourably against the voltage regulator's datasheet.
As for it's designed enviroment of operation: a input voltage range of 9-12 volts DC, a fixed ouput voltage of 5 volts DC, a load current of approximately 850 miliamps, a target tv output of RCA composite with a 75 Ohm termination, and is to be hand assembled.
I haven't assembled or ordered the board yet, so i'm mostly just asking for feedback on it's theoretical design, but if possible i'd like to refrain from major layout changes. Below are my files so you can view them and make your own judgements, I used kicad for designing this board. Also, I don't have super high standards for how i want this to turn out, just that it has full functionality and that there aren't any critical errors/obvious things i've overlooked.
Thank you to anyone who takes the time to read this and give their feedback.
I won't bore you with background but I've been working on this for a long while and would love some feedback on it's efficacy.
It's the first major circuit project I've ever undertaken, you guys seem nice but still I'd appreciate if you could keep that in mind. As stated in the title It's a Daughterboard, meant to be a drop-in replacement of the power supply/rf Daughterboard of an original CPU-07 revision Nintendo Family Computer & replace it's rf av output with equivalent RCA composite signals for compatibility with north american televisions.
It comprises a buck converter power supply section, and an audio/video signal processing section to clean up and/or boost the signals for output to television. For technical details, the board is 4 layers, is limited in size to be 88 by 50 milimeters to fit within the original console's shell, the DC input and AV output connectors are fixed in position for the very same reason, is intended to ouput a signal compliant with north american CRT televisions etc
I'd like particularely like feedback in the following areas: the stability of the buck regulator layout and whether you feel placement of it's components are effective (please tell me where you would put them if you had feedback on this point), whether the av section is sufficiently noise-coupled, whther the av section is also properly buffered and has proper impedance, whether the board properly grounded where it needs to be, and whether you found anything to speak of DFM and manufacturability.
For checks i've already done: DFM checks have been passed, NPTH clearences have been verified, I have multiple dedicated ground planes, and feedback routing has been reviewed favourably against the voltage regulator's datasheet.
As for it's designed enviroment of operation: a input voltage range of 9-12 volts DC, a fixed ouput voltage of 5 volts DC, a load current of approximately 850 miliamps, a target tv output of RCA composite with a 75 Ohm termination, and is to be hand assembled.
I haven't assembled or ordered the board yet, so i'm mostly just asking for feedback on it's theoretical design, but if possible i'd like to refrain from major layout changes. Below are my files so you can view them and make your own judgements, I used kicad for designing this board. Also, I don't have super high standards for how i want this to turn out, just that it has full functionality and that there aren't any critical errors/obvious things i've overlooked.
Thank you to anyone who takes the time to read this and give their feedback.
