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.

Register Log in

SG3525 based Push-Pull converter Feedback

Status
Not open for further replies.
U

usama14

Member level 5
Joined
Oct 31, 2015
Messages
90
Helped
0
Reputation
0
Reaction score
0
Trophy points
6
Activity points
756
Hello Everyone.
I am gonna design a Push-Pull dc dc converter converting 48V to 330Vdc based on the Tahmid's blog as below.
circuit 50kHz.png

My questions are:
1) Do I have to use isolation in the feedback, for example through opto-couplers, to isolate the higher voltage secondary side from the primary side? Or will the above circuit work as it is?

2) If I dont use the isolation, then according to the circuit, all grounds are connected to a common ground. Is is right?

Thankyou!
 

It depends on what this device is required to power.
If one side of the output can be grounded, then you are in luck.

If the output needs to be floating, then your voltage feedback needs isolation.
 

Warpspeed said:
It depends on what this device is required to power.
If one side of the output can be grounded, then you are in luck.

If the output needs to be floating, then your voltage feedback needs isolation.
Click to expand...

I wanna give this output to a microcontroller based SPWM Full bridge Inverter circuit. So, do I require isolation or not?
 

Warpspeed said:
The negative side of the bridge could be grounded, that is pretty common practice.
Click to expand...

Thankyou. I'll design it without the isolation and then discuss with you. :)
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top