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The charging IC (integrated circuit) manages the charging current flowing to the battery, protecting it from overcharge and regulating charge speed. A faulty charging IC results in no charging, extremely slow charging, or the phone only charging at a specific angle — symptoms often confused with a damaged port.
What You Will Need
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Replacement charging IC (model-specific chip)
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Hot air rework station
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Microscope or high-magnification loupe
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Flux and solder paste
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Solder wick
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Tweezers with fine tips
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Isopropyl alcohol and PCB brush
Step 1 — Confirm IC Failure
Before attempting IC-level repair, rule out: charging cable, wall adapter, charging port, and battery condition. A phone that charges fine with wireless charging but not via cable (or vice versa) is a strong indicator of charging IC failure on a specific charge path.
Step 2 — Access the Motherboard
Full disassembly is required to access the motherboard. Remove all components, remove the board, and place it on a stable, heat-safe work surface under magnification.
Step 3 — Remove the Faulty IC
Apply flux generously around the IC. Use a hot air station at 320–360°C with a focused nozzle to reflow the IC's solder balls. Lift the chip with fine tweezers once solder fully reflows. Clean pads with solder wick and IPA.
Step 4 — Reball and Solder New IC
Apply solder paste or reballing stencil to the new chip. Position it precisely on the pad array — all pads must align. Reflow with hot air, applying flux mid-heat if needed. Inspect under magnification for bridges or cold joints.
Step 5 — Reassemble and Test
Rebuild the phone and test charging across multiple charge speeds and cable types. Confirm battery percentage changes correctly during charging before considering the repair complete.
