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You can calculate the resistor value with the equation that is presented in section 5.1.2 Current Regulation Set (PROG) of the datasheet IC/33244_SPCN.pdf.
Gpel e04 magnetic micro usb converter adapter charging head series#
You can add some resistors in series between the PROG pin and resistor labeled 202 (this would require cutting a trace) or replacing the surface mount resistor with a higher resistance value.
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I recommend changing the resistor that is on board to reduce charge rate. Looking at the charge rate for the battery, it looks like the recommended charge rate is 1C (or 400mA). In general, if you are charging your LiPo at a fast rate past the charge current specs of the battery, the life of the battery will go down. The default output from a standard USB port is 500mA. 4 of 4 found this helpful: Charge rate last updated about 2 years ago The default charge rate for the LiPo Charger Basic is set to 500mA. This can fluctuate back and forth with charging depending on if there is some small discharge with the LiPo battery. From the datasheet, this unit features “AutomaticPower-Down.' So when the battery is fully charged, the LED should turn off and the charge IC controller should turn off. This is an output to indicate the charge status which is explained in section 5.2.1 in table 5-1:Shutdown: Hi-Z (High-impdedence mode)No battery present: Hi-ZPreconditioning: L (Low)Constant-Current Fast Charge: LConstant Voltage: LCharge Complete – Standby: H (High)Since the cathode (-) of the LED is connected to the controller, setting the pin low turns the LED on setting the pin high (or putting it in high-impedence mode) turns the LED off. 29.4x10.8mm SchematicEagle FilesDatasheet (MCP73831T)GitHub SparkFun LiPo Charger Basic - Micro-USB Product Help and Resources Support Tips Skills Needed 5 of 5 found this helpful: MCP73831T STAT Pin and STAT LED last updated about 2 years ago If you look at the datasheet for the LiPoly USB Charger's IC controller, the LED is connected to the charge status output (STAT). We also have this charger with a mini-USB connection as well. A small mounting hole allows this charger to be easily embedded into a project.Note: This version uses a micro-USB cable. Check the datasheet below to see if it will work with your battery.The board incorporates a charging circuit, status LED, connector for your battery (JST-type used in the batteries we carry), and a micro-USB connector. It is designed to charge single-cell Li-Ion or Li-Polymer batteries.
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8.95 8.50 8.06 7.61 1 items 10 items 25 items 100 items Description Features Documents If you need to charge LiPo batteries, this simple charger will do just that, and do it fast! The SparkFun LiPo Charger Basic is stripped down of all features and just does one thing well - charge 3.7V LiPo cells at a rate of 500mA.
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In stock PRT-10217 RoHS Has 3D Model 24 $ 8.95 Volume sales pricing Quantity discounts available Added to your shopping cart ×××× Creative Commons images are CC BY 2.0 Share Use this URL to share: Share on Google Share on Tumblr Submit to reddi Share on Twitter Share on Facebook Pin It Favorited Favorite 43 Wish List 3D Download: Sketchup, STL, Blender SparkFun LiPo Charger Basic - Micro-USB In stock PRT-10217 RoHS Has 3D Model 24 $ 8.95 Volume sales pricing Quantity discounts available Added to your shopping cart $ 8.95 Volume sales pricing Quantity discounts available Added to your shopping cart In stock 250 items in stock.