描述 Description

The FAN54010 family (FAN5401X) combines a highly integrated switch-mode charger, to minimize single -cell Lithium-ion(Li-ion) charging time from a USB power source, and a boost regulator to power a USB peripheral from the battery.
The charging parameters and operating modes are programmable through an I'C Interface that operates up to 3.4 Mbps. The charger and boost regulator circuits switch at 3MHz to minimize the size of external passive components.
The FAN5401X provides battery charging in three phases: conditioning, constant current, and constant voltage.
To ensure USB compliance and minimize charging time, the input current is limited to the value set through the IFC host.Charge termination is detemined by a programmable minimum current level.A safety timer with reset control provides a safety backup for the IFC host.
The integrated circuit(IC) automatically restarts the charge cycle when the battery falls below an internal threshold. If the input source is removed, the IC enters a high-impedance mode with leakage from the battery to the input prevented.Charge status is reported back to the host through the Ic port. Charge current is reduced when the die temperature reaches 120℃.
The FAN5401X can operate as a boost regulator on command from the system. The boost regulator includes a soft-start that limits inrush current from the battery.
The FAN5401X is available in a 1.96x1.87 mm,20-bump,0.4 mm pitch, WLCSP package.

特性 Features

? 用于單體鋰離子和鋰聚合物電池組的全集成高效充電器
? 比線性充電器的充電速度更快
? 充電電壓精度：
25°C時為0.5%
0至125°C時為1%
? ±5%輸入電流調(diào)節(jié)精度
? ±5%充電電流調(diào)節(jié)精度
? 20V絕對最大輸入電壓
? 6V最大輸入工作電壓
? 1.25A最大充電速度
? 可通過具有快速模式及其兼容性的高速I2C接口(3.4Mb/s)進行編程
輸入電流
快速充電 / 終端電流
充電器電壓
終端使能
? 占空周期范圍寬的3MHz同步降壓PWM控制器
? 小尺寸1μH外部電感
? 帶復(fù)位控制功能的安全定時器
? 輔助電路的1.8V VBUS穩(wěn)壓輸出
? 由下降的充電電流調(diào)節(jié)來保持最小VBUS電壓的弱輸入源
? 防止電池漏電至VBUS的反向小漏電流
? 5V，300mA的升壓模式，用于USB OTG的2.5到4.5V的電池輸入

應(yīng)用 Application

TBA