Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronic Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

MOSFET High side and low side applications

Status
Not open for further replies.

Afla

Newbie level 1
Joined
Apr 15, 2015
Messages
1
Helped
0
Reputation
0
Reaction score
0
Trophy points
1
Activity points
8
probably you people have heared about

MOSFET high side switch (drain is connected to +ve and load is taken from source)



MOSFET low side switch (load is taken from drain and source is connected to ground)

i want to know, what are the typical applications using MOSFET in both above cases ?


thanks
 

KlausST

Super Moderator
Staff member
Joined
Apr 17, 2014
Messages
18,104
Helped
4,059
Reputation
8,118
Reaction score
3,977
Trophy points
113
Activity points
119,434
Hi,

..and you can also use a Pchannel FET for highside switching, then you don`t need a charge pump.

***
N-Ch FETs are more common and easy to drive. There are logic level MOSFETS that can be directely driven by a 5V or even 3.3V logic output.

But in cars you have a common "minus" system. All the chassis is connected to minus. Here it makes more sense to switch the high side. One wire swiched high side to load, and return via chassis.

***

Klaus
 

BradtheRad

Super Moderator
Staff member
Joined
Apr 1, 2011
Messages
13,647
Helped
2,701
Reputation
5,398
Reaction score
2,620
Trophy points
1,393
Location
Minneapolis, Minnesota, USA
Activity points
101,910
By mixing N and P devices, you can drive these from a single clock:

The half-bridge alternately provides paths to supply and ground.

The H-bridge can turn single-supply DC into AC.
 

Status
Not open for further replies.
Toggle Sidebar

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top