Having 19 volt - needed 15 volt

[wlie]

I have a PS with an output at 19 volt 8 amp. For charging model fly I only need about 15 Volt 6.5 amp (19 volt are too much). I can not open the PS so I need some external circuit to change the voltage to 15 to 16 volt. The charging use up to 6.5 amp. Any hints?

 

[Shyamal]

You may can use voltage regulator IC and its circuit.

 

[wlie]

I have already looked for such a device but could not find any which can withstand 6.5 amp

 

[4pyros]

Try This; https://www.linear.com/product/LT1083

 

[crutschow]

Just note that any linear method of reducing 19V to 15V @ 6.5A will dissipate 26W of power and will require a very healthy size heat sink.

For lower power dissipation. at the expense of more complexity, you could use a switching regulator.