343S00437 Power iC for iPhone 12 Series Main PMIC Chip

Why the 343S00437 Power iC Matters on iPhone 12 Boards
The 343S00437 Power iC is the main power management chip on the iPhone 12 family, and iFixit teardowns of the iPhone 12, 12 Pro, and 12 Pro Max list it as the Apple APL1094 343S00437. Every power rail on the logic board depends on this chip, so a weak or shorted unit gives you a dead phone, a charging issue, or a board that stays stuck before the logo. The same chip serves the iPhone 12, 12 mini, 12 Pro, and 12 Pro Max, which makes it a regular part number for your stock. If you search for an iPhone 12 power IC price in Pakistan, match this exact marking on your board before you order. A wrong part number wastes your time, your hot air session, and your customer’s patience.

Where This IC Sits in Your Repair Workflow
This part belongs to the IC and PCB repair stage, after diagnostics and before final testing. You start with a DC power supply and watch the current draw when you connect the board. A board that pulls high current with no response points you toward a hardware fault in the power section, and a board that shows almost no current makes you suspect a dead main power chip. You confirm with a multimeter in diode mode on the main rails and compare the readings against a known good board. Many technicians reach this stage after a dead after flash complaint or a liquid damaged phone, because software marna never fixes a hardware fault. Do not skip the visual check either. Look for corrosion, burnt marks, or missing small parts around the chip, because a new IC fails again if the original cause stays on the board.

IC Change Karna: Removal, Cleaning, and Fitting
Replacing this chip needs a hot air station with stable airflow control, a good preheater, quality flux, and a microscope so you can see every pad. Protect the nearby components first, because the area around the main power IC is crowded with small parts. Lift the old chip slowly, clean the pads with solder wick and fresh flux, and inspect them under the microscope for lifted or damaged pads. Check the underside of the new IC as well. If it needs reballing, use a reballing kit with the right stencil and keep your hand steady. Place the chip in the correct orientation, reflow it evenly, and keep the heat as low as the job allows. Let the board cool before you handle it. Rushing this step leads to bridged balls and a second dead board.

Testing the Board and Choosing Related Tools
After you fit the chip, connect the board to your DC power supply and check the current behavior before you reassemble anything. A healthy board wakes up and moves toward boot, while a short or a stuck current reading sends you back to the microscope to hunt for bridges. Test charging, display, and network on the bench before you close the phone, so the customer does not return with the same complaint. Keep a note of your readings before and after the repair, which helps when a similar board arrives next week. A hot air station, a microscope, a reballing kit, a multimeter, and a PCB holder form the core set for this job. If you plan an upgrade path, a hot air station with finer airflow control and a stronger preheater makes every IC change karna safer. Browse the Hot Air Stations, Microscopes, and Reballing Kits categories at KB GSM Store to complete your setup.