FSA831AL10X

Series:	--
Packaging:	Tape & Reel (TR)
Lead Free Status / RoHS Status:	--
Part Status:	Not For New Designs
Moisture Sensitivity Level (MSL):	--
Function:	Multi-Function Controller
Battery Chemistry:	--
Number of Cells:	--
Fault Protection:	Over Voltage
Interface:	USB
Operating Temperature:	-40°C ~ 85°C (TA)
Package / Case:	10-UFQFN
Supplier Device Package:	10-MicroPak™
Base Part Number:	FSA831

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The FSA831AL10X is a Power Management Integrated Circuit (PMIC) under the Battery Management category. This PMIC handles Protection and Charging functionalities for Lithium-ion batteries. It is specifically designed to protect Lithium-ion batteries against undervoltage, overvoltage, over-temperature, over-current, and over-charge conditions.BasicsThe FSA831AL10X is offered in the RoHS-compliant 72-pin QFN package with an operating temperature of -40°C to +85°C. It supports 3.5V to 16V input voltage and 2.5V to 4.38V output voltage. It has an average current detection accuracy of about ±50mA with a powerful 20A peak current rating for short durations. The independent watchdog timer can be used to reset the system with a timeout period of 16 seconds.Application FieldThe FSA831AL10X is primarily used in smartphones, tablets, and other portable electronic devices that are powered by Lithium-ion batteries. It is also used in industrial and automotive applications. This PMIC is integrated in battery packs to provide protection against over/under voltage, over temperature, over charge/discharge current, and short circuits. The power supply can be rapidly switched on or off, eliminating the need for an external switch.FeaturesThe FSA831AL10X offers a host of features such as a programmable undervoltage (UVP), overvoltage (OVP), charge voltage (VC), discharge current limit (IDC), overcharge current (OC), overheat protection (OT), and current regulation (IR). Additionally, the PMIC supports a wide range of charging temperatures and charging current/voltage conditions. It can automatically adjust the charging current based on the temperature of the battery for improved accuracy, stability, and safety.Working PrincipleThe FSA831AL10X operates on a three-stage charging algorithm. During the first stage, it kicks in pre-charge charging current that is used to prepare the battery for the main charging cycle. In the second stage, the device keeps a constant charge current as per the pre-defined settings. During the last stage, the battery is charged to its maximum capacity at a pre-determined voltage while the charge current gradually starts dropping. This ensures the battery is charged safely and efficiently.The FSA831AL10X also has an integrated voltage stabilizer circuit and current sense amplifier for accurate current regulation. The voltage and current are adjusted based on the particular application requirements to maintain the battery’s health. The PMIC continuously monitors the battery temperature for safe operation and can automatically shut down the charging in case of temperature over-shoot.ConclusionThe FSA831AL10X is an advanced power management IC specifically designed for Lithium-ion battery applications. It provides efficient and safe charging along with protection from over and undervoltage, over-temperature and over-charge conditions. The integrated voltage stabilizer and current sense amplifier provides the necessary accuracy and flexibility while the wide range of charging temperature and current settings make it suitable for a variety of applications.

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