High side N channel MOSFET driver ?

[asrock70]

Can you recommend an integrated high side MOSFET driver for 48V power supply.
Alternatively Get a sample solution.

 

[jpanhalt]

Why do you need it to be high side? What are your current and switching time requirements?

John

 

[asrock70]

Load have in series thermocouple and must be grounded.
Current is 10A and switching time adequately small

- - - Updated - - -

Load must be grounded and without voltage when transistor is OFF.
Current is 10A, Drain voltage 25V and for driving have 48V.
Switching time adequately small

 

[asrock70]

Nobody ?

For a better idea
Seeking something a driver in the picture, but
- faster R1 charging the gate slowly
- energy saving in OFF is current over R1 too large

 

[Astrid]

At speeds
https://obrazki.elektroda.pl/1602948900_1397774215.png

 

[D.A.(Tony)Stewart]

Although this can drive 8.9A at 85'C ambient and 125'C Tj, you might get more current using 40'C max environment and a bigger heatsink on TO220 and have Tj<<125'C.

Astrid's design has the right approach with push pull drivers, and that IRF can handle +/- 20V Vgs.. However you only need to drive Vgs to 0V and +10V is OK.

You will likely want to add a diode clamp on the load for the negative spikes from inductive wire load.

 

[asrock70]

Thanks to all
Use POWER HIGH SIDE SWITCH is interesting idea, but price and versatility still speaks for classical N-MOSFET.
IRF3205Z have 6,5mOhm and price about 0.8$

 

[jony130]

Check out this hight side driver

 

[FvM]

Unfortunately we are missing a full problem specification.

A bootstrap driver like the suggested circuit in post #8 will only work for a pulse application but not for a static switch. So we don't know if it's applicable. For a static switch, you either need an auxilarysupply voltage or DC/DC converter, e.g. a charge pump to generate it.

 

[M.Imran Ali]

High side MOSFET driver IR2110 .......

 

[ALERTLINKS]

With discreet components, for DC and upto many KHz, suitable for use with microcontroller.