1. Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
    Dismiss Notice

how to generate +5V\2ma from a -90V\1A floating dc\dc ...?

Discussion in 'General Electronics Chat' started by bulerias, Jan 3, 2003.

  1. bulerias

    bulerias New Member

    Joined:
    Jan 3, 2003
    Messages:
    1
    Likes:
    0
    hi,
    as wrriten on the subject,i have a dc\dc that supplies -90V/1A,and i need to supply also +5V\2mA,on the same ground.
    i thought on linear regulator,to save space & money...but how should i connect the ground between the -90 and the +5V...? (THEY MUST BE ON THE SAME GROUND !!!)...?
    (DC\DC solution has a minimum load more than 2mA,and it cost more than linear regulator)
    also i regulate the voltage to -5V,is there any switch capacitor from -5 to +5v ?
    THANKS
    Bull
     
  2. kinjalgp

    kinjalgp Active Member

    Joined:
    Oct 28, 2002
    Messages:
    1,851
    Likes:
    3
    Location:
    INDIA/USA
    Tie the reference terminal of -90V and ground of 5V together. This will be your circuit ground. The circuit would be like this:

    (+)------------> +5V

    (-)
    ========> GND
    (+)

    (-)------------> -90V
     

Share This Page