Charger Usb Data

Charger Usb Data

Need help from mobile engineer. I want 2 modify my USB data cable 2 charge data cable. give me some info .?

I use my cell phone Siemens M65 as a modem with my computer. but problem is it's running out of charge my data cable is not capable 2 charge moblie. in that case every 4 ours later must charge my mobile. How can i configure my USB data cable convert 2 a chrger that can my pc can charge + data suply ?it's has 12 pins & all of them used. If last 2 pin is not use i can put them 2 become a carger with usb +5 volt. If there have a risk posibilty that i marge my charger adapter & data cable ? i want 2 know web site or info which pin do what (siemens data cable 12 pins ). Give me details.My adapter have 2 pins 1 + 1 - it's use 9 volt. use have 5 volt which one can i configure 2 which pin. which is better ?

Where can i find details about my data cable ?
That site i want there would details about which pin do what. about pin 0 to 5 for USB & For Data Cable 0 to 12 pin.

The battery in your phone is likely a Lithium Ion battery. These batteries are charged with a constant current limited to 1C or less. You should check the amp-hour rating of your battery, but it is probably around 1000 mAh so you can charge it at 1000 mA or 1A maximum. But it is always preferrable to charge at a lower current than the maximum.

The Lithium Ion needs to charge at a constant current until the maximum voltage is attained, then the charger must change to a constant voltage charger and not exceed the allowed charge voltage. As the battery charges, the current will drop. Once the current drops below 3%C, the battery is charged and the charger must be disconnected.

The USB voltage (Vbus) is 5V and your cell phone battery is probably 4.1V. So a low dropout regulator (LDO) can drop the charge voltage to 4.1 volts from the 5V. Placing a current limiting resistor in series with the LDO will limit the current to the battery.

As for the wiring, a standard 4-wire USB cable has the VBUS on pin 1 and the ground on pin 4.

Good luck with your project!

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