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; Fri, 9 Oct 2020 12:47:01 -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 099JZSG9002536; Fri, 9 Oct 2020 15:36:04 -0400 Received: from outgoing-exchange-1.mit.edu (OUTGOING-EXCHANGE-1.MIT.EDU [18.9.28.15]) by PCH.mit.edu (8.14.7/8.12.8) with ESMTP id 099JZRrw002533 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Fri, 9 Oct 2020 15:35:27 -0400 Received: from oc11exedge1.exchange.mit.edu (OC11EXEDGE1.EXCHANGE.MIT.EDU [18.9.3.17]) by outgoing-exchange-1.mit.edu (8.14.7/8.12.4) with ESMTP id 099JZHgp029516 for ; Fri, 9 Oct 2020 15:35:27 -0400 Received: from w92exhyb6.exchange.mit.edu (18.7.71.111) by oc11exedge1.exchange.mit.edu (18.9.3.17) with Microsoft SMTP Server (TLS) id 15.0.1293.2; Fri, 9 Oct 2020 15:34:15 -0400 Received: from oc11exhyb7.exchange.mit.edu (18.9.1.112) by w92exhyb6.exchange.mit.edu (18.7.71.111) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Fri, 9 Oct 2020 15:35:11 -0400 Received: from NAM10-DM6-obe.outbound.protection.outlook.com (104.47.58.105) by oc11exhyb7.exchange.mit.edu (18.9.1.112) with Microsoft SMTP Server (TLS) id 15.0.1395.4 via Frontend Transport; Fri, 9 Oct 2020 15:35:11 -0400 Received: from CO2PR04CA0144.namprd04.prod.outlook.com (2603:10b6:104::22) by CH2PR01MB6024.prod.exchangelabs.com (2603:10b6:610:44::26) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3433.35; Fri, 9 Oct 2020 19:35:10 +0000 Received: from CO1NAM03FT063.eop-NAM03.prod.protection.outlook.com (2603:10b6:104:0:cafe::b4) by CO2PR04CA0144.outlook.office365.com (2603:10b6:104::22) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3412.20 via Frontend Transport; Fri, 9 Oct 2020 19:35:09 +0000 Received: from mail-qk1-f178.google.com (209.85.222.178) by CO1NAM03FT063.mail.protection.outlook.com (10.152.81.61) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3455.23 via Frontend Transport; Fri, 9 Oct 2020 19:35:09 +0000 Received: by mail-qk1-f178.google.com with SMTP id b69so11767057qkg.8 for ; Fri, 09 Oct 2020 12:35:09 -0700 (PDT) Received: from [192.168.1.22] ([216.154.0.78]) by smtp.gmail.com with ESMTPSA id r13sm6772745qtp.94.2020.10.09.12.35.06 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 09 Oct 2020 12:35:06 -0700 (PDT) From: Jim Ruxton To: "piclist@mit.edu" Sender: "piclist-bounces@mit.edu" Date: Fri, 9 Oct 2020 12:35:05 -0700 Subject: Re: [EE] Looking for equivalent IC to HT4928S Lithium Ion Charger Thread-Topic: [EE] Looking for equivalent IC to HT4928S Lithium Ion Charger Thread-Index: AdaedPVpKwmXfxVNQX2qZzB9GEEAiQ== Message-ID: References: List-Help: List-Subscribe: , List-Unsubscribe: , In-Reply-To: Reply-To: Microcontroller discussion list - Public. Accept-Language: en-US Content-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 209.85.222.178 as permitted sender) receiver=protection.outlook.com; client-ip=209.85.222.178; helo=mail-qk1-f178.google.com; dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:to:references:from:message-id:date:user-agent:mime-version :in-reply-to:content-transfer-encoding:content-language; bh=q/iz2aUk3ifLjzgZ3FdRgYEwqlvJB+5aMzDAMeShr/0=; b=Q2VdKibo1t7QsjqS3iTv7+cndv8RK+fze1TeZvEC7nARmx80F5JN/pOGpg+uQP3zaX tOtj2E5YtthwgTsJivqV8mntQOdUboV67ZrJoIVrLWWxrKGB+ZTA+OPPd8O8/jwNH2Vx knKoIxmdYNY6n2HCLpKBT1sZBuMGH06NoO5CwZM1k1JVoHVS/Y0ivZkHtr3oQXtMHLDK nfh5X12w+jirksMHT46A1T0crbBG4wDC6AdsOASBagqj3mi2LaThhU+B1S8NL3jnelSO 29cs4f+uEFnZAK4VkmUMtVzEvYCVt+S7GBvaCNGWZNOKv4dMgCCBs9pUhYBEERtxHIpm SwGg== authentication-results: spf=pass (sender IP is 209.85.222.178) 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; user-agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 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:a37:b784:: with SMTP id h126mr7450221qkf.385.1602272108032; Fri, 09 Oct 2020 12:35:08 -0700 (PDT) x-topics: [EE] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Hi Josh, Something that may be relevant is that the chip goes into shutdown if=20 the load falls below 60 mA. I know this provides an issue for some=20 people using this module when they have light loads. Jim > Hi Jim, > > I am not sure if I have that exact model, but I definitely tossed > something similar on a recent AliExpress order. My plan was to remove > the USB-A connector so I could solder to its pads for 5V output. > > The only part I hadn't figured out was power control, I don't > necessarily want the boost converter sitting and running while the > unit is off. But I also find it sloppy if the unit needs to be > switched on to charge. > > I'm sure there's a clever solution, I just haven't looked for it yet. > > Josh --=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 .