Transforming 4.5V charger to a usb charger

Status
Not open for further replies.
I

izua

Member level 3
Joined
Oct 31, 2006
Messages
63
Helped
2
Reputation
4
Reaction score
0
Trophy points
1,286
Activity points
1,880
Hi! I have a bunch of devices that charge only through USB. I also happen to have around lying an old ericsson charger (i'm not sure if it's an adapter or a charger) rated at 4.5 V 300mA. (it's a type 4020061 BV)

How can i step up from 4.5 V to 5 and make it a supply instead of a charger? is it possible? Would it be difficult? Any ideas appreciated
 

Re: 4.5V to usb charger

since it is DC you would need a DC-DC converter step up the voltage to 5V,,,,
 

Re: 4.5V to usb charger

Normally, the USB will feed the power supply 5 VDC at pin 1 comparing to pin 4 GND. For the charger, the voltage level 5 VDC and 4.5 VDC should not make any thing difference. I guess you have the problems on the pinout between the 4.5 VDC charger. Although the excellent charger circuit is required the pulse, I believe the constant 4.5 VDC should work. I suggest to check the pinout again.
 

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…