negative supply load switch

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mystery

Joined: 09 May 2001
Posts: 164
Helped: 2
Location: Turkey

03 Mar 2006 7:48 negative supply switch

Hi,

I want to implement a negative supply load switch with using p and n channel mosfet. The switch will be controlled with 3.3V microcontroller.

How may i design this circuit?

thanks

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jiangwp

Joined: 27 Jul 2004
Posts: 184
Helped: 9

03 Mar 2006 13:32 negative supply load switch

You want to impliment circuit that is called low side driver.

There is many structure about the type circuit in the industry.

You can google it . and examine the datasheet to build up your circuit.

mystery

Joined: 09 May 2001
Posts: 164
Helped: 2
Location: Turkey

03 Mar 2006 15:52 negative supply switching

Actually What i want is not a low side driver.
A low side driver switches the ground. The load is energized with the supply.
I have load, which is normaly connected to the ground, and i want to switch the negative supply with using a 3.3V microcontroller I/O.

Added after 1 hours 24 minutes:

Ok I've found the solution[/img]

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