Warning: mysqli::__construct(): (HY000/1203): User howardkn already has more than 'max_user_connections' active connections in D:\Inetpub\vhosts\howardknight.net\al.howardknight.net\includes\artfuncs.php on line 21
Failed to connect to MySQL: (1203) User howardkn already has more than 'max_user_connections' active connectionsPath: ...!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!eternal-september.org!.POSTED!not-for-mail From: legg Newsgroups: sci.electronics.design Subject: Re: neat Hall sensor Date: Fri, 03 Jan 2025 09:33:01 -0500 Organization: A noiseless patient Spider Lines: 45 Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Injection-Date: Fri, 03 Jan 2025 15:30:21 +0100 (CET) Injection-Info: dont-email.me; posting-host="553194c1df2277d627f73d347b72cbdb"; logging-data="4146682"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1+HRIIadR8n2i7CnMB3XuGE" Cancel-Lock: sha1:MslmXsPbDSqkFmucIQCEBoWjlus= X-Newsreader: Forte Agent 4.2/32.1118 Bytes: 2452 On Thu, 02 Jan 2025 08:09:16 -0800, john larkin wrote: >On Thu, 02 Jan 2025 09:05:03 -0500, legg wrote: > >>On Tue, 31 Dec 2024 15:58:07 -0800, john larkin >>wrote: >> >>> >>>https://www.monolithicpower.com/en/mcs1802.html?srsltid=AfmBOoq2BNuYQ-Ef5ee9o7-gyHDqRkK_xS5TAKb-MgxtjZ6r71FItxXm >>> >>>Really nice, as compared to a shunt and an isolated ADC and all that >>>stuff. Reasonably accurate, especially above 20c. >>> >>>But they can't be serious about pushing 50 amps through an SO8 >>>package. Or not for long. >>> >>>Their demo board thermal design is kinda silly. >>> >>> >> >>Demo board makes sense to me. Simplest thermal conductivity >>test. > >They used 4 oz copper, hardly practical. ? What's impractical about 4oz copper in a power circuit? Are you saying it's not enough? I'd say it was more than could be expected from a simple demo board and is typical of higher current layout in this neck of the woods, where power and control circuits try not to share the same board or board layer. Also, using a part with a 50A full scale in a 25-30A continuous rated circuit would be normal pactice, where duty cycle, crest factor or pulse/surge are anticipated under normal operating conditions. There are 'better' SMD packages available, if that is your only concern. You seem to have found some. RL