SM5701 Charging IC

Charging faults are one of the most common complaints walking into any mobile repair shop, and on several Samsung Galaxy models the fault traces back to a single component: the SM5701 charging IC. This chip manages power delivery from the charge connector to the battery and controls USB data switching between the charging port and the motherboard. When it fails or loses a solder joint, you get symptoms that look confusing on the surface — device shows charging icon but battery percentage does not move, phone only charges when the cable is held at an angle, or USB is not detected on the computer at all.You get a component built specifically for board-level micro-soldering work, not a full charging port replacement. That matters on your repair bench because most charging complaints are not caused by a worn-out port — they trace back to this IC losing contact after drops, moisture exposure, or repeated cable insertion stress. A technician working a J120 or J3 2017 board with a dead charging line will usually reflow or replace this IC before touching the connector itself, since connector swaps do not fix an IC-level fault.The SM5701 sits in the charging and USB control workflow between the charge port and the power management section of the board. In a typical diagnostic sequence, you isolate the fault to this stage after ruling out a damaged charge connector and a dead battery — checking continuity and voltage at the IC pins tells you whether the fault is the connector, the IC, or a broken PCB trace. Once you confirm the IC is the point of failure, this component lets you complete the repair without ordering a full sub-board or sending the unit out for BGA rework elsewhere.This is a BGA-package component, so it needs a hot air rework station, flux, and a steady hand rather than a standard soldering iron. Reballing is often required if the original pads lift during removal, so keep your stencil and solder balls ready before starting the job. Preheat the board evenly, protect surrounding components with a shield or kapton tape, and control your hot air temperature carefully — overheating a BGA pad this close to the charge connector risks lifting adjacent traces on a board where trace repair space is already tight.For a repair shop handling volume Samsung Galaxy work, stocking this IC directly on your bench saves time compared to ordering per-job. Charging complaints are frequent enough on J-series and A-series Samsung boards that having this component on hand turns a same-day charging repair into a routine job instead of a wait for parts. Pair it with a continuity tester or multimeter for pin-level diagnosis, a hot air station rated for fine-pitch BGA work, and a fresh charge connector on hand in case the fault turns out to be dual — a cracked port and a damaged IC often show up together after liquid damage.Technicians handling FRP lock, pattern unlock, or software marna jobs on the same handset will also run into charging faults during testing, since a board that will not hold charge cannot stay powered through a long flashing session. Fixing the charging line first with this IC keeps the rest of your repair workflow — flashing, unlocking, or diagnostics — running without the board dying mid-process.