ET9553M Charging iC

A dead phone that plugs in and shows nothing on screen is one of the most common charging complaints you get on the bench, and on a good number of Samsung A-series boards, the ET9553M charging IC sits right at the center of that fault. This 12-pin BGA IC manages power detection and charging path control between the charging connector and the battery circuit. When it fails, you typically see one of three symptoms: the phone shows dead after flash, it charges but the percentage never climbs, or it charges painfully slow even on a rated adapter.You find this IC on Samsung Galaxy A31, A315F, A307F, A30S, A125, A217, M515, and A022 boards. Before you commit to changing the IC, run your usual diagnostic sequence first — check the charging port for damage, test the battery connector, and measure current draw on your power supply. If the board pulls unusual current or shows a short on the charging line, and your USB port and battery both check out clean, the ET9553M becomes your next suspect. This IC works alongside the board's power management IC, so isolate it from a broader PMIC fault before you reach for the hot air station.Removal and replacement follow standard BGA rework practice. Apply flux generously, set your hot air station to the right temperature and airflow for a 12-pin BGA package, and lift the IC without dragging surrounding components. Clean the pad thoroughly before reballing or placing the new IC — leftover flux residue or misaligned balls cause the same charging fault you just fixed. Reflow with steady, even heat, check continuity on the charging line afterward, and test the board with a known-good battery and adapter before you close it up.The reason this IC shows up across so many A-series models comes down to Samsung's shared board design across that generation. If you handle A-series charging repairs regularly, this IC belongs in your parts bin — you'll pull it out often enough that keeping stock on hand saves you a same-day turnaround more than once a month. Pair it with a decent hot air station and a stencil sized for 12-pin BGA work, and this becomes one of the more routine board-level jumps in your workflow rather than a headache.Genuine part quality matters more on charging ICs than almost anywhere else on the board, since a failing replacement gives you the exact same complaint back within days. Source from a supplier who tests stock before shipping, and confirm the pinout matches your board revision before you solder — A-series variants sometimes differ slightly between regions and production batches, and mismatched pinouts damage the board rather than fix it.