Received: from PCH.mit.edu (18.7.21.50) by mail.efplus.com (192.168.0.8) with Microsoft SMTP Server (TLS) id 8.3.485.1; Mon, 12 Jul 2021 13:15:03 -0700 Received: from PCH.MIT.EDU (localhost.localdomain [127.0.0.1]) by PCH.mit.edu (8.14.7/8.12.8) with ESMTP id 16CK5GtM015547; Mon, 12 Jul 2021 16:06:03 -0400 Received: from outgoing-exchange-5.mit.edu (OUTGOING-EXCHANGE-5.MIT.EDU [18.9.28.59]) by PCH.mit.edu (8.14.7/8.12.8) with ESMTP id 16CK5EZj015523 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL) for ; Mon, 12 Jul 2021 16:05:14 -0400 Received: from w92exedge3.exchange.mit.edu (W92EXEDGE3.EXCHANGE.MIT.EDU [18.7.73.15]) by outgoing-exchange-5.mit.edu (8.14.7/8.12.4) with ESMTP id 16CK4mSj012198 for ; Mon, 12 Jul 2021 16:05:14 -0400 Received: from w92expo23.exchange.mit.edu (18.7.74.77) by w92exedge3.exchange.mit.edu (18.7.73.15) with Microsoft SMTP Server (TLS) id 15.0.1497.18; Mon, 12 Jul 2021 16:04:29 -0400 Received: from oc11exhyb1.exchange.mit.edu (18.9.1.60) by w92expo23.exchange.mit.edu (18.7.74.77) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Mon, 12 Jul 2021 16:04:54 -0400 Received: from NAM12-BN8-obe.outbound.protection.outlook.com (104.47.55.174) by oc11exhyb1.exchange.mit.edu (18.9.1.60) with Microsoft SMTP Server (TLS) id 15.0.1497.18 via Frontend Transport; Mon, 12 Jul 2021 16:04:54 -0400 Received: from MWHPR22CA0021.namprd22.prod.outlook.com (2603:10b6:300:ef::31) by DM6PR01MB3835.prod.exchangelabs.com (2603:10b6:5:87::18) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4308.22; Mon, 12 Jul 2021 20:04:49 +0000 Received: from CO1NAM11FT058.eop-nam11.prod.protection.outlook.com (2603:10b6:300:ef:cafe::e7) by MWHPR22CA0021.outlook.office365.com (2603:10b6:300:ef::31) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4308.20 via Frontend Transport; Mon, 12 Jul 2021 20:04:49 +0000 Received: from mail-qk1-f175.google.com (209.85.222.175) by CO1NAM11FT058.mail.protection.outlook.com (10.13.174.164) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4308.20 via Frontend Transport; Mon, 12 Jul 2021 20:04:49 +0000 Received: by mail-qk1-f175.google.com with SMTP id 18so2170387qka.0 for ; Mon, 12 Jul 2021 13:04:49 -0700 (PDT) From: Denny Esterline To: Microcontroller discussion list - Public. Sender: "piclist-bounces@mit.edu" Date: Mon, 12 Jul 2021 13:04:37 -0700 Subject: Re: [EE] Redundant PSU for critical NAS server Thread-Topic: [EE] Redundant PSU for critical NAS server Thread-Index: Add3WpoZRcxCWmbYTSe6X+1g3YbDsw== Message-ID: References: <2fd4df00967f3c7f872cc7c87c6cc133.squirrel@mai.hallikainen.org> <20210712200859.60c4f038@raspberry> List-Help: List-Subscribe: , List-Unsubscribe: , In-Reply-To: <20210712200859.60c4f038@raspberry> Reply-To: Microcontroller discussion list - Public. Accept-Language: en-US X-MS-Exchange-Organization-AuthAs: Anonymous X-MS-Exchange-Organization-AuthSource: TS500.efplus4.local X-MS-Has-Attach: X-Auto-Response-Suppress: All X-MS-Exchange-Organization-SenderIdResult: Pass X-MS-Exchange-Organization-PRD: mit.edu X-MS-TNEF-Correlator: received-spf: Pass (protection.outlook.com: domain of gmail.com designates 209.85.222.175 as permitted sender) receiver=protection.outlook.com; client-ip=209.85.222.175; helo=mail-qk1-f175.google.com; dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to; bh=vfir8q/CcYFcihuW/4yNU5yA8h6h9xF8WM3qhK5PDM4=; b=XGvGHPfm+mdyve9UQOxKRxyyOMLleQtBY/vwsvf/gdVZwOhRd7TCnT9fbbcDqAiDIx uixm0qIHkXZUdx30tZZ6NuHaBd9KK5CTycPaz0bh4LiSPIeT5GYKnyyYaOKOUb4oKFmF C7OK1WAa26adRj+7Fk2dZHdZgVhQ6i+AzLnnxeddbTYsawZUf7U4DTqCJs0vLiRNRHof IXvyL8FRJMhz3i3ZTC1Rb/EWD4enWNV+H5FrbjfpIAf9IDUAKgsmBUhYHKcx+PTeQcU0 d3SnVQvEAeOcKgOSsYcsfle2vNt8kUGzZEh1HgUwayw32gK2MrTW9nlQYI8+XYuxlYlj cBmg== authentication-results: spf=pass (sender IP is 209.85.222.175) smtp.mailfrom=gmail.com; mit.edu; dkim=pass (signature was verified) header.d=gmail.com; mit.edu; dmarc=pass action=none header.from=gmail.com; errors-to: piclist-bounces@mit.edu list-id: "Microcontroller discussion list - Public." list-post: x-beenthere: piclist@mit.edu x-mailman-version: 2.1.6 x-received: by 2002:a05:620a:4151:: with SMTP id k17mr477060qko.10.1626120288509; Mon, 12 Jul 2021 13:04:48 -0700 (PDT) x-topics: [EE] x-content-filtered-by: Mailman/MimeDel 2.1.6 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 I've worked on a couple circuits that had multiple supplies. The term I heard used was "auctioneering diodes". A quick google gives ~10k hits and at least the first page seems relevant to the discussion. -Denny --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .