Matices

USB Single Cell LiPoly charger Resume Rodrigo Forrequi lubiana@gmail.com hypertext transfer protocol://rusticengineering.wordpress.com March 10, 2010 Rodrigo Forrequi email: lubiana@gmail.com http://rusticengineering.wordpress.com 1 USB Single Cell LiPoly Charger atomic number 3 Polymer Battery stationr Introduction atomic number 3 Polymer Batteries be a very common source of powerfulness today. umteen electronics gadgets have one inside, and they have some liable features. Ive bought great batteries, with different sizes and capacities for my electronics projects. So long Im using this batteries, coming the problem: charge them. Charger, magnetic declination 1 So, we take leave to ?nd the correct go for my DIY charger. After some Google look into I found the saying MAX1811 IC. Its a single- kiosk Lithium battery charger that so-and-so be powered directly from a USB or from an out-of-door supply up to 6.5V. Its use a SO-8 Package, wakeful to solde r and can be sampled at Maxim. Other scrap features are: You can engage between 4.1V and 4.2V battery standard point; You can tell apart between 100mA and 500mA sealed drainage from USB; Theres a open drain pin (pin_8) for signaling end of charge condition (2.

5V < VBATT < BATT edict Voltage); A internal thermal shut circuit limits the MAX1811 infract temperature to +135°C by reducing the charging current as necessary. According to datasheet, MAX1811 is speci?cally made for USB devices. The minimum potential difference to a common USB-powered device may be as low as 4.35V when cable and connector dro ps are considered. The MAX1811 is optimized ! for operation at these low input voltage levels. But USB hubs may in addition provide as much as 5.5V!. At high gear input voltages (5.5V) and low cell voltages (2.7V), the MAX1811s thermal closed circuit may limit the charge current until the cell voltage rises. My design uses 500mA was charging current (pin 2 - SELI - pulled up), but MAX1811 tho taken this current if the device is a USB powered source. The opposite separate are two very common tantalum capacitors and...If you fatality to get a full essay, order it on our website: OrderCustomPaper.com

If you want to get a full essay, visit our page: write my paper