BQ24296M Charge Control IC for Lenovo P70

When a Lenovo P70 comes into your workshop dead after flash or stuck on hang-on-logo with no charging response, the BQ24296M charge control IC is one of the first components you check. This chip sits between the battery, the USB input, and the system rail, so a faulty unit shows up as a phone that won't power on, won't charge, or drains fast even on a full battery.Texas Instruments designed the BQ24296M as an I2C-controlled switch-mode charger with narrow VDC (NVDC) power path management. Instead of routing power straight from the charger to the battery, it manages a separate system rail that stays powered even when the battery is deeply discharged or completely removed. That's why you can bench-test a board with no battery attached and still get a system boot — the IC keeps the system rail alive directly from VBUS On your repair bench, this matters most in two scenarios: a board with zero battery voltage that won't accept a charge, and a board that charges but never powers the system properly. The BQ24296M reads the input source through its detection circuit and automatically sets the current limit — anywhere from 100mA up to 3A — matching what the connected USB source can safely deliver. If the input source is capped for any reason, the IC pulls current from the battery to top up the system load instead of stalling.The chip also runs USB OTG mode, boosting VBUS to an adjustable 4.55V–5.5V output at up to 1.5A when the phone is used as a host for OTG accessories. If your test shows OTG output missing or unstable, that's a strong signal to check this IC rather than the connector or battery.For a straight IC change karna job on a Lenovo P70, you don't need special firmware — this is a hardware replacement, not a software marna fix. Confirm with your multimeter or PPS box that the fault sits on the charge control line before reballing, since a jumper lagana shortcut won't fix a genuinely dead IC underneath. Rework demands a hot air station capable of tight, low-airflow control given the 24-pin VQFN's 4x4mm footprint — this is a fine-pitch part, and pad bridging is the most common install mistake technicians make.This IC integrates four internal FETs — the input reverse-blocking FET, high-side and low-side switching FETs, and the battery FET — along with the bootstrap diode for high-side gate drive. That level of integration is why a single failed IC can present as a full dead phone rather than just a charging complaint; it's doing power routing, not just battery charging.Stock this IC if you handle Lenovo P70 charging issue or dead phone repairs regularly, along with the wider range of Tecno, Infinix, HTC, and Huawei boards that share this same charge controller. Pair it with a hot air rework station and a fine-tip soldering iron rated for lead-free solder, and keep a PPS box on the bench to confirm input current draw before and after the swap.