How to get 30 volts as Vout from LYT 1402-1604 (LYTSwitch-1 Family)
Posted by: niraj@infabytes.com
on
Hi there,
We have used LYT 1402-1604 (LYTSwitch-1 Family) to get the output voltage as 30 volt. We have use High-Side Buck circuit on figure 1a. of data sheet.
If the value of R7 is kept 402k ohm (as per figure 5 on page no 3, in Rev.B 07/16), we get Vout over 100 volt dc.
And if I choose R7 value to be 100k ohm, I get Vout as 75 volt DC constant.
Why when I chose the right value of R7, I do not get the expected voltage.
Also, how can I get 30 volt as Vout.
Thanks
Niraj
Hi Niraj,
Thank you for showing interest in Power Integrations and its products.
According to the datasheet, resistor R7 is set to a fixed value of 402 kohms and R4 will determine the overvoltage limit.
R4 can be calculated as follows; R4 = 2V x R7 / (Vout - 2V)
For a 30V design, R4 is 28.7kohms
Thank you.
Please let us know if you have further questions.