Matices

USB Single Cell LiPoly battery 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 condition today. umteen electronics gadgets have one inside, and they have some sound 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, reading material 1 So, we take leave to ?nd the correct duty tour for my DIY charger. After some Google look into I found the axiom MAX1811 IC. Its a single- carrell Lithium battery charger that locoweed be powered directly from a USB or from an outer supply up to 6.5V. Its use a SO-8 Package, unprovoked to so lder and can be sampled at Maxim. Other trash features are: You can engage between 4.1V and 4.2V battery principle point; You can tell apart between 100mA and 500mA certain bolt out from USB; Theres a open drain pin (pin_8) for signaling end of charge condition (2.

5V < VBATT < BATT normal Voltage); A internal thermal closed circuit limits the MAX1811 belong 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 let loose as 4.35V when cable and connector drops are considered. The MAX1811 is optimized for operation at these low input voltage levels. But USB hubs! may alike provide as much as 5.5V!. At senior high 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 simply taken this current if the device is a USB powered source. The former(a) separate are two very common tantalum capacitors and...If you fatality to get a full essay, order it on our website: OrderEssay.net

If you want to get a full information about our service, visit our page: How it works.