ACT2801QL-T0550

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Function:	Multi-Function Controller
Battery Chemistry:	Lithium-Ion/Polymer
Number of Cells:	1
Fault Protection:	Over Current, Over Temperature, Over Voltage, Short Circuit
Interface:	--
Operating Temperature:	-40°C ~ 85°C (TA)
Package / Case:	24-VFQFN Exposed Pad
Supplier Device Package:	24-QFN (4x4)

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Introduction

The ACT2801QL-T0550 is a power management integrated circuit (PMIC). It is used for battery management and provides an optimal charge algorithm for Li-Ion, Li-FeS2, and Li-Polymer battery packs. It includes a charging current regulator, full charge voltage regulator, and battery temperature monitor, as well as a choice of constant current/constant voltage (CC/CV) charger. This PMIC can be integrated with several controllers, providing protection and efficient charge control to conserve battery life and maximize battery performance.

Application Field and Working Principle

The ACT2801QL-T0550 is well-suited for the application of charging and power management of Li-Ion, Li-FeS2, and Li-Polymer battery packs used in portable devices such as tablets and mobile phones. The primary function of this power management integrated circuit is to provide a highly efficient charge process for Lithium-based battery packs. The ACT2801QL-T0550 includes an internal charging current regulator, full-charge voltage regulator, battery temperature monitor, and a choice of constant current/constant voltage (CC/CV) charger. Besides these features, the PMIC also provides protection against battery overcharging and over-discharging, providing extra safety to the battery pack.The working process of the ACT2801QL-T0550 can be divided into the following steps:1. Initiating the charging process: After the PMIC power-on, it starts to measure the storage battery voltage. If the storage battery voltage is lower than the set voltage threshold, then the charging process begins. 2. Doing the charging: The PMIC constantly detects and adjusts the charging current which is based on the battery temperature. Moreover, the power monitoring and voltage monitoring panels monitor the input voltage, charge current, and storage battery voltage to accurately control the charging process. 3. Endpoint detection of charging: battery voltage reaches to a certain level and the charge current decreases, the charger enters the float voltage control mode, the current is small and stable, the power consumption is reduced, and the charging process is about to end.4. Charge termination: When the battery is fully charged, the threshold value of the charging voltage is exhibited, the PMIC detects that the charge current is lower than a certain value and the operation is stopped, then the charging process is complete.

Benefits

The ACT2801QL-T0550 PMIC provides optimal charging control and protection for Li-Ion, Li-FeS2, and Li-Polymer battery packs, helping to conserve battery life and maximize performance. The integrated constant current/constant voltage (CC/CV) charger enables fast and efficient charging of battery packs. Moreover, the PMIC features various protections such as over-voltage protection, over-charge protection, over-discharge protection, and short-circuit protection, providing additional safety for the battery pack.

Conclusion

The ACT2801QL-T0550 PMIC provides an ideal solution for battery management of Li-Ion, Li-FeS2 and Li-Polymer battery packs, offering optimal charging algorithms and a variety of protections to extend and preserve battery life. Thanks to its efficient constant current/constant voltage (CC/CV) charger, the PMIC provides fast and reliable battery charging. With all of these features, the ACT2801QL-T0550 PMIC is an excellent choice for portable device applications such as tablets and mobile phones.

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