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LNK3206GQ buck boost output voltage not regulated to set value

Posted by: kadamrohan16 on Thu, 08/19/2021

Hello ,

I am bench testing the buck boost topology with LNK3206GQ ic .  schematic is attched for the reference .

The  dc-dc converter is not able to produce exact 70V at the output even though the design components  used  are suggested by PI expert tool.

follwoing are  the actual testing results  at constant current  load of 130 mA.

Vout=66.7volts @Vin_min =60V and Vout=65 volts @Vin_max =160V

Please check and let me know what could have gone wrong ?

 

 

Thanks

Rohan

 

Files

Attachment 大小
LNK3206GQ based Buck-Boost.pdf 44.36 KB

评论

Submitted by PI-Jedidiah on Tue, 08/24/2021

Hi  kadamrohan16 ,

You may change R2 to 84.5 kohms to increase the output voltage.

Regards,

Jedidiah