BQ24157YFFT

完全集成的开关模式充电器， USB兼容性和USB -OTG支持 Fully Integrated Switch-Mode Charger With USB Compliance and USB-OTG Support

* Power Up System without Battery * Charge Faster than Linear Chargers * High-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 Rejection * Safety Limit Register for Maximum Charge Voltage and Current Limiting * High-Efficiency Mini-USB/AC Battery Charger for Single-Cell Li-Ion and Li-Polymer Battery Packs * 20-V Absolute Maximum Input Voltage Rating * 6.5-V Maximum Operating Input Voltage * Built-In Input Current Sensing and Limiting * Integrated Power FETs for Up To 1.55-A Charge Rate * Programmable Charge Parameters through I2C™ Compatible Interface up to 3.4 Mbps: * Input Current Limit * VIN DPM Threshold * Fast-Charge/Termination Current * Charge Regulation Voltage 3.5 V to 4.44 V * Low Charge Current Mode Enable/Disable * Termination Enable/Disable * Support up to 1.55A Charge Current using 55 mΩ Sensing Resistor * Synchronous Fixed-Frequency PWM Controller Operating at 3 MHz With 0% to 99.5% Duty Cycle * Automatic High Impedance Mode for Low Power Consumption * Robust Protection * Reverse Leakage Protection Prevents Battery Drainage * Thermal Regulation and Protection * Input/Output Overvoltage Protection * Status Output for Charging and Faults * USB Friendly Boot-Up Sequence * Automatic Charging * Boost Mode Operation for USB OTG * Input Voltage Range from Battery: 3.2 V to 4.5 V * 2.1 mm × 2 mm 20-Pin WCSP Package