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TPS92513: Non Linear dimming with External Mosfet Using TPS92513 driver IC

Part Number: TPS92513

Hi,

Good day.

Our customer is using the TPS92513 and they have an inquiry for this. Kindly refer below.

""We are the manufacturer of LED lighting .we have developed LED bulb and we have issue when do the dimming by external mosfet circuit (attached schematic).We have use LED load of 6.5V/300mA  when apply dimming from 0 to 10% -draw 80mA, 20%-120mA ,30%-200mA ,40%-270mA ,50% to 100%- 270mA to 300mA.
Means 0 to 40% 270mA (out of 300mA) current ,after 40-100% current remains steady (only small change found).
Please support us to resolve the our issue.""

Looking forward to your inputs. Thank you.

8838.Driver Board.pdf6366.20210528_G4 driver.rar
Regards,

Cedrick