Bq24271 reference design circuit | battery charger application circuit

The bq24271 is a highly integrated single-cell Li-Ion battery charger and system power path management device for portable applications with limited space and large capacity batteries. This article mainly introduces the bq24271 characteristics, application range, reference design circuit and circuit analysis to help you shorten the design time.

Bq24271 features: high efficiency switch mode charger with independent power path control; safe and accurate battery management function; can use I2C interface to set charging parameters; voltage based NTC monitoring input

Bq24271 Typical applications: handheld products; portable media players; portable devices; netbooks and portable Internet devices

Bq24271 reference design application circuit:

Figure 1bq24271 internal structure diagram

The bq24271 are highly integrated single cell Li-Ion battery charger and system power path management devices targeted for space-limited, portable applications with high capacity batteries. The single cell charger has several input current limits which allow operation from either a USB port or higher Power input supply (ie AC adapter or wireless charging input) for a versatile solution.

Figure 2bq24271 reference design

Thebq24271 is highly integrated single cell Li-Ion battery chargers and system power path management devices targeted for space-limited, portable applications with high capacity batteries. The singleinput, single cell charger operates from either a USB port or alternate power source (ie wall adapter Or wireless power input) for a versatile solution.

Bq24271 Chinese data sheet: Click to download

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