SN2600B1 Charging IC

The SN2600B1 sits at the center of the charging circuit on the iPhone XS, XS Max, and XR logic boards. Technicians know it by its board reference U3300, and the wider repair industry calls the chip family "Tigris" after its internal codename. This IC takes over from the older Tristar design used on earlier iPhone generations, handling communication between the Lightning connector and the phone's power management system.When a customer brings in a dead phone that shows no charging response, no boot, or an "Accessory not supported" prompt when plugged into a genuine cable, the SN2600B1 is one of the first suspects on the board. The IC negotiates USB data and power signals, so a damaged or shorted chip can block charging entirely even when the battery and charging port test fine on their own. Boards affected by liquid exposure or a hard drop often show corrosion or lifted pads directly under this BGA package, which is why a full visual inspection under a microscope comes before any reflow or IC change attempt.Repair shops that work through iPhone XS, XS Max, and XR volume keep the SN2600B1 in stock as a direct swap part for a confirmed bad IC. The typical workflow starts with isolating the fault: a technician checks current draw on the charging line with a DC power supply, looks for a short or an open circuit around U3300, and rules out the battery connector, charging port flex, and PMU before committing to an IC change. Once the SN2600B1 is confirmed as the failure point, the old chip comes off with a hot air rework station set to the correct BGA reflow profile, the pads get cleaned and reballed if needed, and the replacement IC goes back down with a stencil for accurate ball placement.Board-level technicians also see this IC involved in intermittent charging issues — cases where the phone charges only at certain angles of the cable, or drops the connection under light vibration. These symptoms often point to a partially failed solder joint on the SN2600B1 rather than a fully dead chip, and a straightforward reflow sometimes restores function without a full IC replacement. Because the chip also plays a role in USB data negotiation, some units with a faulty Tigris IC show computer recognition failures alongside the charging problem, which narrows the diagnosis further.Sourcing a reliable SN2600B1 matters because charging ICs from unverified suppliers carry a higher failure rate after installation, leading to repeat visits and wasted rework time. KB GSM Store supplies this IC to technicians across Lahore, Karachi, and Islamabad who need a dependable part for XS, XS Max, and XR board repair without guessing on compatibility or quality.For any shop running regular iPhone board repair, having the SN2600B1 on the bench alongside a hot air station, BGA stencil, and DC power supply keeps charging-related turnaround times short. It remains one of the most frequently replaced ICs on this iPhone generation, right alongside the Hydra IC and PMU, and stocking it in bulk saves ordering delays on high-volume repair days.