Looking for circuit diagram of USB Charger

Status
Not open for further replies.

litto43ph

Newbie level 5
Joined
Oct 23, 2005
Messages
9
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,332
USB Charger

M8,

I used my PS2 or PC to charge my MP3 player(Ipod). Instead of using pc, an external would be better and easy to carry.Can you share a circuit diagram of USB charger?

Thanks,
Litto
 

Re: USB Charger

Hi Litto43ph

The USB spec. for Vbus power is:

+4v40 to +5v25 @ 100mA.
Once a device has been configured the current available to it rises to 500mA.
Max and min capacitance on Vbus per device is 1µF to 10µF.

I suggest that a simple stabilised supply of 5v0 @ 500mA DC source would work satisfactorily.

I would also recommend a 6~7v varistor be placed across the output.

regards ... Polymath
 

USB Charger

so where's the circuit?
 

Re: USB Charger

USB chargers are available in Indian markets for just 30/- Rupees or 0.75 US dollars. You may directly use them with almost all your USB charging devices. If you are so keen building it yourself, use a 5 volts regulated supply in the same polarity as of the PC. Connect the 2 data pins of the charger to + track with 100K resistors. This setup is used to detect a valid charger by some of the devices. You can also have a look at a similar querry, answered by me at
 

Status
Not open for further replies.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…