Hello everyone,
I am repairing a motherboard from a handheld gaming device. Near the LCD connector there is a shielded SMD component that looks like a power inductor. The circuit uses the KTZ8866 LED backlight driver IC.
According to the datasheet, the circuit should have: L1 = 6.8 µH L2 = 2.2 µH
The component on the board is about 3–4 mm square. I want to confirm if this is the boost inductor for the backlight circuit and what package size would be appropriate for replacement.
Any help identifying this component would be appreciated.
Thank you.
A larger, 2-terminal device proximate to a switching control IC may very well be an inductor, however without a schematic for the device in question it’s difficult to suggest a replacement with confidence. Values for support components in controller datasheets are only manufacturer suggestions, and while they’re often followed by those adopting a given IC there’s no requirement to do so.
Candidate devices for a replacement inductor would be found in the fixed inductor family. Filtering by the desired inductance value, size/dimension values and in-stock status would be ways to rapidly narrow that list.