Low power +48V supply from a +15V input supply

[hafrse]

Hello,

I am looking for a simple low power ( around 20mA) circuit to generate +48V from a +15V . Thanks

 

[KlausST]

Hi,

distributors provide a lot of isolated an non isolated DCDC converters.
Some of them are as simple as can be: Three pins: INPUT, GND, OUTPUT

I´d use the distributor´s selection guide.

Klaus

 

[danadakk]

https://www.ti.com/power-management/non-isolated-dc-dc-switching-regulators/step-down-buck/buck-converter-integrated-switch/simple-switcher.html

Regards, Dana.

 

[BradtheRad]

simple...circuit.

This boost converter is simplified to depict basic operation.
a) While switch (or transistor) is closed it pulls increasing current through inductor.
b) When switch opens, inductor generates a pulse of sufficient voltage to push current to output stage.
The 1 ohm resistor is unnecessary. It's included to represent some amount of parasitic resistance.