usb 5v to 12v dc dc step up converter


Posted on Feb 7, 2014

This is a 5V to 12V DC-DC step-up (boost) converter circuitry that is especially ideal for the USB powered applications. First of all a USB port has two current supply modes. Before detecting the connected device, it supplies maximum 100mA to the load. After recognizing the device, it increases the output current up to 500mA. In this circuit, cont


usb 5v to 12v dc dc step up converter
Click here to download the full size of the above Circuit.

roller (LT1618) also provides two input current modes. 100mA and 500mA input modes can be selected by the user. Output currents are limited due to the increased potential difference at the output. When the demand of the load increases, output voltage will start to decrease. For example, if the circuit operates in the 100 mA input mode, when the load is 35 mA, the output voltage will be kept at 12V. But if the load increases to 50 mA, output voltage will reduce to 8V to maintain the constant 100 mA input current.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

TV Modul½±tor
3 channel audio mixer (2N3904)
Light timer switch with PIC12F629
10Mhz universal counter
Get Negative Rail With Cmos Gates
Music On Hold Circuit
Crystal Set 1
LED Flasher Schematic
Hydraulic oil Automotive LED Alarm SL322C schematic
Thyristor AC torque motor speed control circuit 2
DC generator automatic voltage regulator circuit



Top