Donald, Looks like a very nice part but Vin range is?4.5 to 18 V. It could work for 5V protection, but not 3.3V.? Looks like TI has other e-fuses with lower minimum voltage that could work for 3.3V but need to find a low cost one that has the required parameters.
-Steve K1RF
------ Original Message ------
Date 10/21/2024 3:42:33 PM
Subject Re: [QRPLabs] QMX+ V2 - I've killed it
On Mon, Oct 21, 2024 at 12:43 PM, Bruce Akhurst wrote:
There’s definitely a market for a small fast and cheap 3 or 4 terminal protector for the common supply rail voltages
These are $1.56 single quantity, under a dollar at 25 pieces (DigiKey). ?
Overcurrent (2%) , over/undervoltage (3%), thermal protection, Vo dV/dT limiting, etc.? They even have a design calculator tool spreadsheet, just fill in the blanks with your specs. ?
I used them on a MIL SATCOM portable earth terminal power board I designed, among others.? There are many like it, higher voltage, higher current, lower RDSon, etc.
The internal FET makes it a small, bulletproof solution.
73, Don N2VGU
