Laptop Computer Power Supply Circuit

Posted on Sep 29, 2012

A laptop computer supply that has 9-V output, crowbar overvoltage protection, and operates i`rom a 12-V supply is shown above. The supply voltage should be at least 3.6 V above the expected output voltage. Ql should be heatsinked appropriately. R5 should have a value of 1.5 1: for 9-V output. Table 1 gives values for other voltages. Note: Any output voltage value greater than 10V requires a higher input voltage than 13.6V. In addition capacitor working voltage ratings will have to be increased accordingly.

Laptop Computer Power Supply Circuit
Click here to download the full size of the above Circuit.

Allow a minimum of 2.5 times the voltage expected to appear across the capacitor as a standard for the working voltage.

Leave Comment

characters left:

New Circuits



Popular Circuits

AM/cw 12-meter band transmitter
Electronic ship siren
Arduino Serial Call Response
Arduino multi-mode lamp with soft touch switch
Shock alarm circuit
PNP Transistor Analysis
Mini IR Theremin Circuit
Dimming circuit using capacitance
Monostable circuit diagram of the use of video amplifiers and comparators