BQ24105-Q1系列介绍资料

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BQ24105-Q1

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独立汽车类 1 至 3 节 2A 降压电池充电器

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The bqSWITCHER™ series are highly integrated Li-ion and Li-polymer switch-mode charge management devices targeted at a wide range of portable applications. The bqSWITCHER™ series offers integrated synchronous PWM controller and power FETs, high-accuracy current and voltage regulation, charge preconditioning, charge status, and charge termination, in a small, thermally enhanced QFN package.

The bqSWITCHER charges the battery in three phases: conditioning, constant current, and constant voltage. Charge is terminated based on user-selectable minimum current level. A programmable charge timer provides a safety backup for charge termination. The bqSWITCHER automatically restarts the charge cycle if the battery voltage falls below an internal threshold. The bqSWITCHER automatically enters sleep mode when V_CC supply is removed.

Qualified for Automotive Applications
Ideal For Highly Efficient Charger Designs For
Single-, Two-, or Three-Cell Li-Ion and Li-Polymer
Battery Packs
Also for LiFePO₄ Battery (see Using bq24105 to Charge LiFePO4 Battery)
Integrated Synchronous Fixed-Frequency PWM Controller Operating at 1.1 MHz
With 0% to 100% Duty Cycle
Integrated Power FETs For Up To 2-A Charge Rate
High-Accuracy Voltage and Current Regulation
Stand-Alone (Built-In Charge Management and Control) Version
Status Outputs For LED or Host Processor Interface Indicates Charge-In-Progress,
Charge Completion, Fault, and AC-Adapter Present Conditions
20-V Maximum Voltage Rating on IN and OUT Pins
High-Side Battery Current Sensing
Battery Temperature Monitoring
Automatic Sleep Mode for Low Power Consumption
Reverse Leakage Protection Prevents Battery Drainage
Thermal Shutdown and Protection
Built-In Battery Detection
Available in 20-Pin, 3.5 mm × 4.5 mm, QFN Package

All trademarks are the property of their respective owners.

Number of series cells	1, 2, 3
Charge current (max) (A)	2
Vin (max) (V)	16
Cell chemistry	Li-Ion/Li-Polymer, Lithium Phosphate/LiFePO4, NiCd, NiMH
Battery charge voltage (min) (V)	2.1
Battery charge voltage (max) (V)	15.5
Absolute max Vin (max) (V)	20
Control topology	Switch-Mode Buck
Control interface	Standalone (RC-Settable)
Features	BAT temp thermistor monitoring (hot/cold profile), Input OVP
Vin (min) (V)	4.35
Rating	Automotive
Operating temperature range (°C)	-40 to 85

VQFN (RHL)

15.75 mm² 4.5 x 3.5

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BQ24105-Q1

独立汽车类 1 至 3 节 2A 降压电池充电器

4000-306-326