MAX77849EWB Power Ic For Samsung Note 4 S6

Working on a Note 4 or S6 that won't charge, won't power on, or hangs on logo after a drop or liquid exposure? The MAX77849EWB is one of the first chips to check once you've ruled out the charging port and battery. It sits on the power management line of the motherboard, controlling USB cable detection and charging path switching for the device.This chip belongs to the same architecture family as Maxim's MAX77843 power management and MUIC (Micro USB Interface Controller) series, which is why board-level repair guides and kernel-level documentation for Samsung's Note 4 and S6 platforms group it alongside MAX77843-based charging circuits. In real repair terms, that means the IC's job is reading what's plugged into the USB port and switching the charging or data path accordingly. When it fails, the phone can't tell the difference between a charger and a data cable, and you end up with a dead phone or a charging issue that no amount of port cleaning fixes.Common failure signs technicians report on the Note 4 and S6 include no response after a liquid damage clean, dead after flash with no charging LED, hang on logo after board-level short, and charging issue where the phone shows "charging" but current never actually flows into the battery. Before you commit to changing this IC, isolate the fault with a current meter on the charging line and check for shorts around the power management area. If the board pulls unusual current only when a charger is connected, or the phone won't wake at all on USB power, this chip is a realistic suspect.IC change karna on this chip is a fine-pitch reballing job, not a beginner swap. Use a hot air station with stable temperature control, a proper preheat stage to protect surrounding components like the PMIC and battery connector, and flux made for BGA/WLP-style packages. Clean old solder fully before reballing, align the chip under magnification, and reflow with a controlled profile rather than blasting heat directly. After reflow, test charging behavior and USB detection before you close the board — a cold joint on a chip this small will bring the phone right back to your bench.This part ships as a bare replacement IC, not a plug-and-play module, so it's meant for technicians already comfortable with board-level soldering rather than shops that only do screen and battery swaps. Keep it in your parts bin alongside your other Note 4 and S6 power ICs (MAX77819EWB, MAX77818EWZ) since boards with charging faults often need one of these tested in sequence to isolate the actual failure point.For workshops running higher volume on Note 4 and S6 boards, stocking this chip alongside your ISP tools and UFS programmers means you're not waiting on a supplier every time a charging-fault board comes in. Pair it with a reliable hot air rework station and a good microscope for alignment, and this becomes a routine same-day repair instead of a board you have to set aside.