BQ24103系列介绍资料

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BQ24103

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采用 WQFN-20 封装的独立 1 至 2 节 2A 同步降压电池充电器

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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 VQFN package. The system-controlled version provides additional inputs for full charge management under system control.

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.

Ideal For Highly Efficient Charger Designs For
Single-, Two-, or Three-Cell Li-Ion and Li-Polymer
Battery Packs
bq24105 Also for LiFePO4 Battery (see Using
bq24105 to Charge the 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
Available in Both Stand-Alone (Built-In Charge
Management and Control) and System-Controlled
(Under System Command) Versions
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
System-Controlled Version Can Be Used in NiMH
and NiCd Applications
Reverse Leakage Protection Prevents Battery
Drainage
Thermal Shutdown and Protection
Built-In Battery Detection
Available in 20-Pin, 3.50 mm × 4.50 mm VQFN
Package
APPLICATIONS
- Handheld Products
- Portable Media Players
- Industrial and Medical Equipment
- Portable Equipment

All other trademarks are the property of their respective owners

Number of series cells	1, 2
Charge current (max) (A)	2
Vin (max) (V)	16
Cell chemistry	Li-Ion/Li-Polymer
Battery charge voltage (min) (V)	4.2
Battery charge voltage (max) (V)	8.4
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	Catalog
Operating temperature range (°C)	-40 to 85

VQFN (RHL)

15.75 mm² 4.5 x 3.5

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BQ24103

采用 WQFN-20 封装的独立 1 至 2 节 2A 同步降压电池充电器

4000-306-326