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AL-3214 is a buck-boost DC conversion charging IC that achieves step-down and step-up

conversion with an H-bridge. Supports charging management for 1 to 4 lithium batteries.

Full charging voltage and charging current can be programmed via external resistors.

Constant current control is used to protect against overshoot under undesired conditions.

Built-in loop compensation simplifies the circuit and design. PFM is used to maintain high efficiency under light load currents.

AL-3214 ensures thermal stability protection and battery undervoltage lockout. Wide input voltage range: 4.2V to 21V.

Adaptive input current limiting. 1-4 cell selectable charging cutoff voltage. Efficient buck-boost conversion.

450kHz switching frequency. Programmable charging current (up to 3A).

Quiescent current: <5μA. Integrated thermal protection.

Application areas:

Handheld devices

Multi-cell lithium battery charging products

Wide voltage charging products