{"product_id":"photovoltaic-cell-battery-charger-solar-cell-li-ion-battery-trickle-charger-with-mppc","title":"Photovoltaic Cell Battery Charger \/ Solar Cell Li-Ion Battery Trickle Charger with MPPC","description":"\u003cp\u003e\u003cspan\u003eThis is a tiny module that allows users to charge small Li-ion batteries, CR2032 or equivalent, from a low power source such as a small photovoltaic cell. The project consists of the \u003c\/span\u003e\u003cstrong\u003eLTC3105\u003c\/strong\u003e\u003cspan\u003e step-up DC-DC converter chip which features Maximum Power Point Control (MPPC) and \u003c\/span\u003e\u003cstrong\u003e250mV start-up\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003evoltage which enables operational directly from low power, high impedance alternative power sources such as photovoltaic cells. A user-programmable MPPC set point maximizes the energy that can be extracted from any power source. Burst Mode operation, with a proprietary self-adjusting peak current, optimizes converter efficiency and output voltage ripple overall operating conditions. The circuit works with single-cell or dual-cell in parallel. The operating supply of this project is as low as \u003c\/span\u003e\u003cstrong\u003e225mV\u003c\/strong\u003e\u003cspan\u003e and a maximum \u003c\/span\u003e\u003cstrong\u003eof 5V.\u003c\/strong\u003e\u003cspan\u003e Input supply should not exceed 5V DC. The module is programmed to output \u003c\/span\u003e\u003cstrong\u003e4.1V\u003c\/strong\u003e\u003cspan\u003e which is important to charge the Li-On battery. Jumper J1 should be open for normal operation, close to disable the output.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNIMH Battery Charging:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003echarging NiMH battery is also possible with this module by changing feedback resistors value, R4 = 470K, R5= 0 Ohms. R1 and R2 remain unchanged. This change will provide 3.2V output and it’s sufficient to charge 2x NiMH batteries.\u003c\/p\u003e\n\u003cp\u003eSuitable Solar Cell -\u0026gt; Digikey Part:\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.digikey.in\/product-detail\/en\/powerfilm-inc\/MP3-37\/1996-1024-ND\/9559474\"\u003e1996-1024-ND\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eInput Supply 225mV to 5V (Photovoltaic Cell)\u003c\/li\u003e\n\u003cli\u003eOutput 4.1V \/ Approx. 20mA\u003c\/li\u003e\n\u003cli\u003eMaximum Power Point Control\u003c\/li\u003e\n\u003cli\u003eOutput Disconnect and Inrush Current Limiting\u003c\/li\u003e\n\u003cli\u003eVIN \u0026gt; VOUT Operation\u003c\/li\u003e\n\u003cli\u003eSoft Start\u003c\/li\u003e\n\u003cli\u003eAutomatic Power Adjust\u003c\/li\u003e\n\u003cli\u003ePCB Dimensions 29.05 x 13.81mm\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"dotfry","offers":[{"title":"Default Title","offer_id":47221583380652,"sku":"G169","price":9.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0757\/6436\/7532\/files\/G169A.jpg?v=1789547310","url":"https:\/\/dotfry.com\/products\/photovoltaic-cell-battery-charger-solar-cell-li-ion-battery-trickle-charger-with-mppc","provider":"dotfry","version":"1.0","type":"link"}