BQ24159 与 USB 完全兼容的完全集成开关模式单节锂离子充电器。

描述The bq24153A/6A/8/9 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, bq24153A/8 can provide VBUS (5.05 V) by boosting the battery voltage. The IC is available in 20-pin WCSP package.特性Charge Faster than Linear ChargersHigh-Accuracy Voltage and Current Regulation Input Current Regulation Accuracy: ±5% (100 mA and 500 mA)Charge Voltage Regulation Accuracy: ±0.5% (25°C), ±1% (0°C to 125°C) Charge Current Regulation Accuracy: ±5%Input Voltage Based Dynamic Power Management (VIN DPM)Bad Adaptor Detection and RejectionSafety Limit Register for Maximum Charge Voltage and Current LimitingHigh-Efficiency Mini-USB/AC Battery Charger for Single-Cell Li-Ion and Li-Polymer Battery Packs20-V Absolute Maximum Input Voltage Rating9-V Maximum Operating Input Voltage- bq24156A/96-V Maximum Operating Input Voltage- bq24153A/8Built-In Input Current Sensing and LimitingIntegrated Power FETs for Up To 1.55-A Charge RateProgrammable Charge Parameters through I2C Compatible Interface (up to 3.4 Mbps): Input Current LimitVIN DPM ThresholdFast-Charge/Termination CurrentCharge Regulation Voltage (3.5 V to 4.44 V)Low Charge Current Mode Enable/DisableSafety Timer with Reset ControlTermination Enable/Disable Support up to 1.55 A Charge Current Using 55- mΩ Sensing ResistorSynchronous Fixed-Frequency PWM Controller Operating at 3 MHz With 0% to 99.5% Duty CycleAutomatic High Impedance Mode for Low Power Consumption Robust Protection Reverse Leakage Protection Prevents Battery DrainageThermal Regulation and ProtectionInput/Output Overvoltage ProtectionStatus Output for Charging and FaultsUSB Friendly Boot-Up SequenceAutomatic Charging Power Up System without Battery bq24158/9Boost Mode Operation for USB OTG: (bq24153A/8 only) Input Voltage Range (from Battery): 2.5 V to 4.5 VOutput for VBUS: 5.05 V/ 200 mA2.1 mm × 2 mm 20-Pin WCSP PackageAPPLICATIONSMobile and Smart PhonesMP3 PlayersHandheld Devices