Dear experts,

I would like to know if it is possible to change the Rt=49,9kOhm - recommended value by the datasheet - to reduce the base bias current and all over the quiescent power consumption of the device? My application uses a simple push pull architecture…

Hi 

When using LT3999 with a light load, the output voltage became higher than the set value.

I also tried it with LTspice and I saw a similar waveform.

Is there a way to  regulate the output voltage at light loads?

Best Regards,

Hgtk

Hello!

I have a problem with LT3999.

I simulate LDO with parameters:

Vin=12V

Vout=12V

Iout=800 mA.

I use Coilcraft PA6384 with turns ratio 1:1.4 and diaode with Vf=1V.

I do not understand, why the output violtage rises more than 12v?

 Then I add a load…

Hello everyone, 

I am designing a DC-DC converter with the LT3999, input voltage is 24V and output voltages are 5 and 15V.

I am facing some problems. What should be the minimum inductance of the primary side? and what are the parameters of the LT3999 that…

Is there any mechanism in LT3999 which forbid flux imbalance in the converter?

I am designing a DC-DC converter with LT3999, input Voltage is 24V and output voltages are 15V and 5V, what should be the minimum value of the primary inductance

Hi,

I am running a LTSpice simulation using in-built LT3999 macro model test fixture available. The test fixture is designed for a 12V input, 12V output, 0.4A load which seems to be working well.

However, when the load is changed to 1kohm and Rdc set…

In the link: www.analog.com/.../high-frequency-push-pull-dc-dc-converter.html, equation 14 and equation 15. They both have a factor "Ts/4". I wonder how the figure '4' come from? Thanks.

Hi All,

I am using LT3999MP part in my design. As per datasheet, SW node voltages (at SWA and SWB) should be between -0.3V and 80V (screenshot below).

The transformer that I am using has leakage inductance of 0.45uH. Based on simulations with LT3999…