What is the difference between the LT8640S & LT8640S-2 ?

Which products are newer?

Thanks

Hy.J

I have a design with two LT8640S devices.  They are set to generate 12V from a 24V input.  One is used to power devices on another board.  The other powers on-board devices.  The LT8640S for the off-board devices works fine and generates 12V.  The LT8640S…

Hello

Our customer will use LT8302 fly back and LT8640S.

(24V-> 5.5V by LT8302 and 5.5V-Vf-> 3.3V about 4A by LT8640S.

(Refer to attached slide 1)

He simulated this design by LTspice.

(Result is attached slide 2)

When LT8302 SW current reaches…

Hi,

I've designed a board with the LT8640.

The switcher is not working and the IntVcc pin is stuck at 2V instead of the specced >3V.

The input voltages are ok and the switching terminal is silent and doesn't do anything.

Where could I start…

Hello.

Is there a date for when the LT8640S will be supported by LTPowerCAD? 

Thanks for the help.

Hi all,

I'm doing reliability analysis (according to Telcordia SR332 Issue 3 method).

Fit/MTBF values given by Analog here follow another standard and are not comparable to Telcordia values.

I need MTBF/FIT value (according to Telcordia) for this…

Hello, can you confirm that PCB file for LT8640 works? Because I cannot run it with Altium Designer. I need this file for my thesis project. I would be happy if you can help me on it.

I don't get 1 μF of bypass capacitor.
Therefore I think we'll set a bypass capacitor of VIN1,2 to 2.2 μF.
Would there be an anxious point?

Can I have advice?

I am trying to simulate the LT8640S briefly losing power on its input and then recovering. I'm using a voltage divider to supply the EN/UV pin.

The LT8640S turns on with the initial application of power (24V), but when the input power goes to 0V…

Hello,

I´m trying to dynamically adjust the LT8640S output voltage with an external control voltage (let´s say from a DAC).

Could this be done using the TR/SS pin?

The LT8640S output voltage refers to its resistor devider:

Vout = 0,97V …