Need help designing power supply(In = 9-15V out=19v 3-4A)

[zanor]

Hi!

Need help designing a powersupply for my laptop for use in car. Output must be 19v and 3-4A.
I have three UC2577-T ADJ but I'm not sure how to use them.

Please help me.

Thanks!

 

[IanP]

Re: Need help designing power supply(In = 9-15V out=19v 3-4A

Theoretically speaking, switcher in this voltage regulator can switch currents of up to 3A, so 9V@3A (assuming 100% efficiency) can be converted to 19V@1.4A ..

Also, connecting these regulators' outputs in parallel won't work ..

Try to use something like LM2588ADJ, or similar ..

Regards,
IanP

 

[snazzy c]

pls can anyone help me confirm the schematic for an alarm reset using a relay. i ve an 8 pins relay and want to stop the alarm (reset) each time there is an alarm (fault). all i did was connecting my fault voltage line(s) through the NC of the relay then to the alarm, looped to the NO of the push button switch - whose signal energizes the relay coil to disengange the alarm. i hope am right! sorry i didnt include my schematic. pls help!