SM5414 Charger IC

The SM5414 is a 1-cell Li-Ion switching charger IC built by Silicon Mitus, and it sits at the center of the charging circuit on the Android boards that use it. Unlike a basic linear charger, this chip runs a high-efficiency synchronous switching regulator, which means it converts and regulates charging power with less heat loss and tighter control over current delivery. That efficiency matters on a repair bench — when you replace a damaged charging IC with a mismatched or lower-grade part, you often see charging issues resurface within weeks. Matching the original chip keeps the board behaving the way the manufacturer intended.At the core of the SM5414's design is intelligent dual-path output. This lets the phone power up and run system functions directly from the USB or TA input even when the battery is completely dead — no more waiting for a trickle charge before the board even boots. If you've dealt with a dead phone that won't show any sign of life on the display or logo, and you've confirmed the battery itself is fine, a faulty charging IC handling this dual-path function is a common root cause.The chip takes a single input line for both USB and TA (travel adapter) sources and can withstand up to 20V on that input, which gives it a safety margin against voltage spikes from cheap chargers — a real-world scenario on repair benches across Pakistan where customers bring in boards charged with unbranded adapters. Programmable charge parameters run over a 400kHz I2C compatible interface, covering fast charge current, charge termination current, battery regulation voltage, pre-charge current, and both fast-charge and charge-reduction threshold voltages. The 1.5MHz switching frequency and dedicated charge reduction mode keep charging efficient even under sustained load.Protection circuitry on the SM5414 covers thermal protection and thermal regulation, input and output overvoltage protection, adaptive input current limit protection (AICL), reverse leakage protection, no-battery detection through pin sensing, battery overvoltage protection, and over-current protection during discharge. This stack of protections is why board-level techs trust this chip on boards showing a hang on logo after flash, or a board that develops charging issue right after a software marna session — a properly functioning SM5414 rules out charger-side faults so you can isolate the problem to PMIC, battery connector, or charging port instead.The chip also runs boost mode for USB OTG, outputting a programmable 5.0V to 5.2V at up to 900mA — the function responsible for OTG accessory support on the phone.Physically, the SM5414 ships in a 25-bump WLCSP package measuring 2.08mm x 2.08mm, which means this is fine-pitch reballing and hot air work — a stable microscope setup and controlled hot air station make the difference between a clean IC change and a lifted pad. On boards where this chip has failed, techs typically pair the IC swap with a check of the neighboring charging port and PMIC to confirm the fault doesn't originate elsewhere on the board.KB GSM Store stocks the SM5414 as a genuine replacement part for technicians working OPPO and Meizu charging faults, sourced for boards where the