• High Efficiency, 1.5MHz, Synchronous Buck Charger
93% Charge Efficiency at 1A from 5V Input
91% Charge Efficiency at 2A from 5V Input
Optimized for USB Voltage Input (5V)
Selectable PFM Mode for Light Load Efficiency
• USB On-The-Go (OTG) Support (Boost Mode)
Boost Converter with up to 1.2A Output
Boost Efficiency of 93.5% at 0.5A and 92.2% at 1A
Accurate Hiccup Mode Over-Current Protection
Soft-Start Capable with up to 500μF Capacitive Load
Output Short Circuit Protection
Selectable PFM Mode for Light Load Operations
• Single Input for USB or High Voltage Adapters
3.9V to 13.5V Operating Input Voltage Range
20V Absolute Maximum Input Voltage Rating
Programmable Input Current Limit and Dynamic Power
Management (IINDPM, 100mA to 3.2A with 100mA Resolution)
to Support USB 2.0 and USB 3.0 Standards and High Voltage Adaptors
Maximum Power Tracking by Input Voltage Limit up to 5.4V (VINDPM)
VINDPM Tracking of Battery Voltage
• High Battery Discharge Efficiency with 28mΩ Switch
• Narrow Voltage DC (NVDC) Power Path Management
Instant-On with No or Highly Depleted Battery
Ideal Diode Operation in Battery Supplement Mode
• Ship Mode, Wake-Up and Full System Reset
Capability by Battery FET Control
• Flexible Autonomous and I2 C Operation
Modes for Optimal System Performance
• Fully Integrated Switches, Current Sense and Compensation
• 10μA Ship Mode Low Battery Leakage Current
• High Accuracy
±0.5% Charge Voltage Regulation
±5% Charge Current Regulation at 1.5A
±10% Input Current Regulation at 0.9A
• Safety
Battery Temperature Sensing (Charge/Boost Modes)
Thermal Regulation and Thermal Shutdown
Input Under-Voltage Lockout (UVLO)
Input Over-Voltage (ACOV) Protection
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• 90% 高效开关模式 2A 充电器
• 3.9V 至 6.2V 单输入 USB 标准充电器,提供 6.4V 过压保护
输入电压和电流限制支持 USB 2.0 和 USB 3.0
输入电流限值:100mA、150mA、500mA、 900mA、1A、1.5A 和 2A
• USB OTG 在电流为 1A 或 1.5A 时的可调输出电压 范围为 4.55V 至 5.5V
快速 OTG 启动(典型值为 22ms)
5V 升压模式效率为 90% – 精确的 ±15% 断续模式过流保护
• 窄范围 VDC (NVDC) 电源路径管理
在无电池或深度电池放电时的即时系统启动
电池充电模式中的理想二极管运行
• 薄型 1.2mm 电感 1.5MHz 开关频率
• I2C 端口用于实现最优系统性能和状态报告
• 具有或不具有主机管理的自主电池充电
电池充电启用 – 电池充电预调节
充电终止和再充电
• 高精度
±0.5% 充电电压调节
充电电流调节范围为 ±7%
输入电流调节范围为 ±7.5%
USB OTG 升压模式下 ±3% 输出电压调节范围
• 高集成 – 电源路径管理
同步开关 MOSFET
集成电流感测
阴极负载二极管
内部环路补偿
• 安全性 – 针对 OTG 模式中充电和放电的电池温度感测
电池充电安全定时器
热调节和热关断
输入和系统过压保护
MOSFET 过流保护
• 针对 LED 或主机处理器的充电状态输出
• 通过输入电压稳压实现的最大功率跟踪功能
• 20µA 低电池泄漏电流,支持运输模式
• 4mm x 4mm 紧凑型超薄四方扁平无引线 (VQFN)- 24 封装
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