PM845 002 Power iC

When a Galaxy S9, S9+, or Note 9 comes into your shop completely dead — no charging LED, no boot logo, nothing on the board test point — the PM845-002 is one of the first ICs you check. This is Qualcomm's power management chip for the Snapdragon 845 platform, and it sits right at the center of the phone's power tree. Every rail that wakes up the CPU, memory, and charging path runs through this IC first, so when it fails, the whole board goes silent.You'll usually land on this chip after ruling out the easier causes. If the phone shows zero current draw on your power supply, or current spikes and drops without ever stabilizing, that points at PM845-002 rather than a software fault. Boot loop after a bad flash, a board that stays dead after a liquid damage clean, or a device that won't take charge even after a battery and charging port swap — all of these push you toward a power IC replacement instead of another software marne attempt.Reballing or replacing the PM845-002 is a hot air rework job, not a beginner task. You need a preheat station to protect surrounding components, a matching stencil for the correct ball layout, and a steady hand on reflow temperature, since Qualcomm PMICs are sensitive to overheating during removal. Clean the pads properly before placing the new chip — a rushed reball here causes short circuits or a repeat dead board a week later, and that comes back to your shop as a return.This part is sourced as an original Qualcomm chip pulled from verified working boards, not a generic clone. For technicians who handle Samsung Snapdragon 845 board repair regularly, keeping a few PM845-002 units on the shelf saves turnaround time on dead phone cases where the customer needs the device back the same day.Pair this IC with your existing hot air station and BGA reballing kit — you don't need new equipment, just the correct stencil for this footprint. If you're setting up a dedicated power IC repair station, our hot air rework stations and reballing kits stock cover the rest of the workflow, from removal to final reflow and continuity testing.Test the board on your power supply before and after the swap. A correctly seated PM845-002 should show a clean current draw pattern on power-up, with no shorts on the main rails. If the phone still won't turn on after the reball, recheck your solder joints before assuming a second bad chip — cold joints on PMIC reballs are a more common cause of a "still dead" board than a genuinely faulty new IC.Keep this chip in your parts drawer alongside your other Snapdragon 845 power section components. Samsung's S9 series and Note 9 are still common in repair shops across Pakistan, and a dead-after-drop or dead-after-liquid-damage case on these models often traces straight back to this IC.