Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics 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.

[SOLVED] dual NPN and a Diode driveing a P-Channel MOSFET

Status
Not open for further replies.

marcogmaia

Newbie level 5
Joined
Apr 15, 2019
Messages
8
Helped
1
Reputation
2
Reaction score
1
Trophy points
3
Activity points
67
Hello, I've ran simulations with this driver circuitry, tested it in my bench, and is working nicely, but I've never seen this configuration before.

If this topology have a name, what is it called?
And what cautions should I take?
I only need a max of 500Hz.

double_npn_d_driver.png
 
Last edited:

No idea... Common emitter driving common collector driving drain follower with slow rise and fall time output?

I've seen a PNP used for fast FET turn off and to keep bounce loop inside MOS and PNP.

I like this kind of circuit. What function does common collector serve? Along with diode, is it supposed to implement fast turn-on and fast turn-off?
 

Yes, I was trying to speed up the fall time of the FET
 
  • Like
Reactions: d123

    d123

    Points: 2
    Helpful Answer Positive Rating
Hi,

Not that bad.
But a lot of effort.
There are high side power switches ... with additional features.
Maybe something like this: NCP45524I

Klaus
 

For me cost is the problem, the circuit e in the picture costs about 10 - 15 cents.
 

Hi,

I see.

But you need to take the overall cost into consideration.
* assembling cost for 8 additional parts
* increased board size
* stock costs
* purchase costs
* increased failure rate
* and so on...

Klaus
 
Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top