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High-side and low-side gate driver outputs that alternate switching external N-channel MOSFETs to buck the adapter voltage down to battery charging levels.

The , frequently marked as OZ8682LN or simply OZ8682 , is a specialized power management integrated circuit (IC) designed primarily for lithium-ion (Li-ion) battery charging, often found in laptops and portable computing devices. Housed in a compact QFN-16 package, this component plays a crucial role in managing the safe and efficient charging of battery packs.

). An open or drifted resistor will distort the internal current readings, triggering safety shutdowns.

He tried variations. 8682L controller , 8682L military spec . Nothing. It was a ghost. A silicon phantom.

The midpoint junction of the high-side and low-side MOSFETs, outputting to the power inductor.

Current sensing inputs to monitor charging current. GND: Ground connection.

: Use an oscilloscope to probe Pin 4 (SMCLK) and Pin 5 (SMDATA). If there is no pulse activity when the battery is plugged in, the communication loop between the IC and the Embedded Controller is broken.

Battery current sensing pin to regulate charging and discharging limits safely. VDDP Internal gate driver power supply rail. 12 BOOT

| Parameter | Value | |-----------|-------| | Output Voltage (Fixed) | 3.3V, 5.0V, 9V, 12V (varies by suffix) | | Maximum Output Current | 150mA – 300mA (depending on package) | | Dropout Voltage | ~0.5V – 0.7V @ 100mA | | Input Voltage Range | Up to 30V (Absolute Max ~35V) | | Line Regulation | 0.2% / V | | Load Regulation | 0.4% typical | | Quiescent Current | 2mA – 5mA |

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If you are currently sourcing a replacement or debugging a design, let me know:

While pinning nomenclature can subtly shift across schematic implementations depending on individual board-designer preferences, the fundamental layout centers around specific node clusters:

For physical replacements, components matching exact QFN-16 packaging specs can be referenced via component distributors such as the Aliexpress Electronics Marketplace to ensure physical compatibility during board re-balling or soldering operations.

While specific pin functions must always be verified against the manufacturer’s schematics (as they can vary slightly with different LN variants), typical functions for a charger IC in this package include: Power input. GND: Ground reference. ACIN: AC adapter voltage monitoring.

The device runs successfully on the battery pack but completely fails to detect or pull current from an attached AC adapter.