LNK3206GQ : Lowest Possible working Input voltage
Hello All ,
I am designing a buck boost configuration using LNK3206GQ switcher . The minimum input voltage in my application is 59.2VDC but as per the datsheet of the IC , its 60VDC.
1.will this switcher IC work for 59.2 VDC volts of input voltage ?
2. In the datsheet minimum drain pin supply voltage specified is 50V . whats its significance ? is it the lowest possible working input voltage for IC ?
3.is there any documentation or reference to confirm that the switcher ic will work for 59.2V ?
Please provide your comments .
Thanks in advance .
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Attached is the schematic for Buck Boost Vout =70V.
on bench testing , output is not reaching to 70 volts instead getting to 67.6V at Vin_min (60V) and 65 V (160) at Vin_max.
components values are taken from PI tool except R3 and Css ( soft start cap).
what could be the issue ?
Please give your suggestion
Thanks
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Hi Kadamrohan16,
Thanks for your inquiry.
The 50Vdc is where the drain can bias the internal circuitry of the LNK TN2.
The 60V specs is 50V + 10V margin.
With this data, the 59.2Vin is still acceptable and IC can still operate in this range.
Thanks
Regards PI-CHLOE