The (full part number OZ8682L or OZ8682LN ) is a highly integrated SMBus Level 2 Battery Charger Controller manufactured by O2Micro . It is widely used in laptop power management systems, particularly in mid-range and legacy Apple MacBook Pro (e.g., A1286) and various notebook motherboards. Key Technical Review
The RT8682L is typically utilized for point-of-load (POL) conversions, stepping down higher voltage rails (such as 5V or 12V) to lower voltages required by microcontrollers, DSPs, memory, or ASICs.
: Use a standard lead-free reflow profile. If manual soldering is required, a hot air station with a fine nozzle is recommended. Solder Paste
The chip comes in a small QFN-16 package (3x3mm or 4x4mm). It is highly sensitive to Electrostatic Discharge (ESD); safety protocols like anti-static wrist straps are mandatory. 8682l Datasheet
Finding a direct alternative for a proprietary IC like the OZ8682L is challenging. However, engineers often look for functional equivalents. The search results point to several similar battery charger ICs, such as the from Texas Instruments, which is also a host-controlled multi-chemistry battery charger and the UP1589Q mentioned as an equivalent.
: The OZ8681L, also from O2 Micro, is a related device. However, it is crucial to note that it serves a different purpose. The OZ8681L is a smart battery charger (SBC) with SMBus programmability for battery management, whereas the 8682L is part of the main power supply generation circuitry. Technicians have questioned the compatibility between the 8681L and 8682L, and they are generally not interchangeable due to these different roles.
While an official datasheet from a specific manufacturer is definitive, the following table represents the for devices matching the 8682l designation in repair and design communities. The (full part number OZ8682L or OZ8682LN )
Note: For the exact schematic, always refer to the specific OZ8682LN datasheet from the manufacturer, as pin functions can vary slightly based on the revision. Applications of the 8682L IC
The OZ8682L is a moisture-sensitive device (MSD). Before any soldering, the component must be pre-baked to remove any absorbed moisture. The recommended procedure is to bake the IC at . This prevents the "popcorning" effect, where trapped moisture expands rapidly under heat, causing internal delamination and destroying the chip.
: Pin configuration to select the battery series cell count (e.g., setting thresholds for 2S, 3S, or 4S Lithium-ion packs). : Use a standard lead-free reflow profile
A practical example of troubleshooting this IC comes from the BadCaps.net forum, where a user detailed their struggle with a Lenovo 100-15ibd laptop that refused to charge or detect the battery.
Understanding this datasheet allows engineers to diagnose charging failures, design custom power circuits, and implement stable battery backup infrastructures. Functional Overview and Role in Power Systems