BQ24156中文资料I2C 单节 1.55A 降压电池充电器数据手册TI规格书

描述 Description

The bq24153/6/8 is a compact, flexible, high-efficiency, USB-friendly switch-mode charge management device for single-cell Li-ion and Li-polymer batteries used in a wide range of portable applications. The charge parameters can be programmed through an I2C interface. The IC integrates a synchronous PWM controller, power MOSFETs, input current sensing, high-accuracy current and voltage regulation, and charge termination, into a small WCSP package. The IC charges the battery in three phases: conditioning, constant current and constant voltage. The input current is automatically limited to the value set by the host. Charge is terminated based on battery voltage and user-selectable minimum current level. A safety timer with reset control provides a safety backup for I2C interface. During normal operation, The IC automatically restarts the charge cycle if the battery voltage falls below an internal threshold and automatically enters sleep mode or high impedance mode when the input supply is removed. The charge status can be reported to the host using the I2C interface. During the charging process, the IC monitors its junction temperature (TJ) and reduces the charge current once TJ increases to about 125°C. To support USB OTG device, bq24153/8 can provide VBUS (5.05V) by boosting the battery voltage. The IC is available in 20-pin WCSP package.

特性 Features

• Charge Faster than Linear Chargers
• Input Current Regulation Accuracy: ±5% (100 mA and 500 mA)
• Charge Current Regulation Accuracy: ±5%
• Input Voltage Based Dynamic Power Management (VIN DPM)
• Safety limit register for maximum charge voltage and current limiting
• 20-V Absolute Maximum Input Voltage Rating
• 6-V Maximum Operating Input Voltage-bq24153/8
• Integrated Power FETs for Up To 1.5-A Charge Rate-bq24156, 1.25A-bq24153/8
• Input Current Limit
• Fast-Charge/Termination Current
• Low Charge Current Mode Enable/Disable
• Termination Enable/Disable
• Synchronous Fixed-Frequency PWM Controller Operating at 3 MHz With 0% to 99.5% Duty Cycle
• Robust Protection
• Thermal Regulation and Protection
• Status Output for Charging and Faults
• Automatic Charging
• Boost Mode Operation for USB OTG: (bq24153/8 only)
• Output for VBUS: 5.05 V/ 200 mA
• 2.1 mm x 2 mm 20-Pin WCSP Package
• Mobile and Smart Phones
• Handheld Devices