Handles the clock and data signals sent by the laptop's Embedded Controller (EC) to program charging thresholds.
The 8681L IC is a type of voltage regulator IC that is designed to provide a stable and regulated output voltage from an unregulated input voltage. It is a member of the 78L series of ICs, which are known for their high reliability, low dropout voltage, and high current capability. The 8681L IC is commonly used in a wide range of applications, including power supplies, voltage regulators, and electronic circuits.
: The UGATE and LGATE pins pulse external N-channel MOSFETs, stepping down the high adapter voltage (typically 19V–20V) to match the nominal battery stack voltage (typically 7.4V to 14.8V). 8681l ic datasheet
: Gate drive signals driving external high-side and low-side N-channel MOSFETs for synchronous buck rectification.
The 8681L IC stands out due to its high efficiency, compact footprint, and robust protective features. Electrical Characteristics 4.5V to 21V DC Output Voltage Range: Adjustable from 0.8V up to 15V Continuous Output Current: Up to 3A Peak Efficiency: Up to 95% Switching Frequency: Fixed 500 kHz (typical) Feedback Voltage: 0.8V ( Advanced Capabilities Integrated MOSFETs: Low Handles the clock and data signals sent by
: SMBus (System Management Bus) , permitting real-time programmable charge voltage and charge current adjustments from the system's Embedded Controller (EC).
Communicates with the main battery to determine the optimal charging profile. 8681L IC Datasheet Specifications and Features The 8681L IC is commonly used in a
When the system is powered on, the 8681L monitors the AC adapter's capacity and allocates all remaining current not used by the system to charge the battery.