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.

Illumination driver high speed power NMOS switch 10Mhz ~ 100MHz

Status
Not open for further replies.

subrata_m

Newbie level 4
Joined
May 9, 2018
Messages
6
Helped
0
Reputation
0
Reaction score
0
Trophy points
1
Activity points
61
Hi All ,
Do anyone know about a power mosfet that can switch 3Amp current , in the range of 10Mhz to 100Mhz .
I found CSD16301Q2 of TI can switch up to 80Mhz , but I was looking for 100Mhz .

reference article on illumination drive
https://www.ti.com/lit/an/sbaa209b/sbaa209b.pdf


Again, I was told about RF mosfets but not sure if they can handle high current and will they work in the required frequency range . any advice will be appreciated .
 

Hi,

but not sure if they can handle high current and will they work in the required frequency range . any advice will be appreciated .
Every mosfet manufacturer and most distributors have (interactive) selection tools to find devices for your requirements.
They are free. Use them.

At least this is how I'd do it.

Klaus
 

Using standard Si power MOSFET is a bad idea. Besides dedicated Si RF power MOSFET I would look for GaN.
 
I was also thinking about GaN devices .
the current to be switched is in the range of 1A .
Do you have any recommended GaN device.

Also LDMOS devices can handle high speed. driving GaN is painful .
 

Yes , that is what all of us do;)
Thanks for reminding anyway.
 

Different GaN offerings have different degrees of difficulty
in driving. Cascode types like Transphorm get driven like
a MOSFET because they are a MOSFET under a depletion
mode GaN cascode FET. GaN Systems FETs are more gate-
overvoltage tolerant than EPC (like, you could drive them
with a 5V high current CMOS buffer - maybe even with a
paralleled AC series octal buffer, paralleled up (on the low
side - high side, you'll likely be more limited by available
GaN drivers' speed than the FETs)).

You don't say specifically what voltage rating (and I'm
not motivated to read the datasheet, which doesn't
say what -you- want, just what -it- is). Low voltage
power MOSFETs are "faster" and lower Cgg for a given
current. 1A is low end or sub-low-end for GaN FETs
I've seen listed.

Some idea of whether it's high side or low side switched
might help you get better answers about drivers.

10-100MHz is not a happy place for switching losses,
drivers or controllers. What's the upside, other than
maybe the hope of using an air core inductor (which
sounds cool, until EMI testing time)?
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top