描述 / Descriptions
少的外部元件數(shù)目使得BRCL4054CME成為便攜式應(yīng)用的理想選擇。BRCL4054CME可以適合USB電源
和適配器電源工作。
The BRCL4054CME is a complete constant-current/constant voltage linear charger for single cell
lithium-ion batteries. Its Thin SOT package and low external component count make the
BRCL4054CME ideally suited for portable applications. Furthermore, the BRCL4054CME is
specifically designed to work within USB power specifications.
由于采用了內(nèi)部PMOSFET架構(gòu)，加上防倒充電路，所以不需要外部檢測電阻器和隔離二極管。熱反
饋可對充電電流進(jìn)行調(diào)節(jié)，以便在大功率操作或高環(huán)境溫度條件下對芯片溫度加以限制。充電電壓固定
于4.2V，而充電電流可通過一個(gè)電阻器進(jìn)行外部設(shè)置當(dāng)充電電流在達(dá)到最終浮充電壓之后降至設(shè)定值
1/10時(shí)，BRCL4054CME將自動(dòng)終止充電循環(huán)。
No external sense resistor is needed, and no blocking diode is required due to the internal
MOSFET architecture. Thermal feedback regulates the charge current to limit the die temperature
during high power operation or high ambient temperature. The charge voltage is fixed at 4.2V, and the
charge current can be programmed externally with a single resistor. The BRCL4054CME
automatically terminates the charge cycle when the charge current drops to 1/10th the programmed
value after the final float voltage is reached.
當(dāng)輸入電壓（交流適配器或USB電源）被拿掉時(shí)，BRCL4054CME自動(dòng)進(jìn)入一個(gè)低電流狀態(tài)，將電池
漏電流降至2uA以下。也可將BRCL4054CME置于停機(jī)模式，以而將供電電流降至25uA。
BRCL4054CME的其他特點(diǎn)包括充電電流監(jiān)控器、欠壓閉鎖、自動(dòng)再充電和一個(gè)用于指示充電結(jié)束和輸
入電壓接入的狀態(tài)引腳。
When the input supply (wall adapter or USB supply) is removed, the BRCL4054CME automatically
enters a low current state, dropping the battery drain current to less than 2μA. The BRCL4054CME
can be put into shutdown mode, reducing the supply current to 25μA. Other features include charge
current monitor, under voltage lockout, automatic recharge and a status pin to indicate charge
termination and the presence of an input voltage.
特征 / Features
¾ 高達(dá)500mA的可編程充電電流
Programmable Charge Current Up to 500mA
¾ 無需MOSFET、檢測電阻器或隔離二極管
No MOSFET, Sense Resistor or Blocking Diode Required
¾ 用于單節(jié)鋰離子電池、采用SOT23-5封裝的完整線性充電器
¾ Complete Linear Charger in 5-Lead SOT-23 Package for Single Cell Lithium-Ion Batteries
¾ 恒定電流/恒定電壓操作，并具有熱調(diào)節(jié)功能
Constant-Current/Constant-Voltage Operation with Thermal Regulation to Maximize Charge Rate
Without Risk of Overheating
¾ 直接從USB端口給單節(jié)鋰離子電池充電
Charges Single Cell Li-Ion Batteries Directly from USB Port
¾ 4.2V預(yù)設(shè)充電電壓
Preset 4.2V Charge Voltage with ±1% Accuracy
¾ 用于電池電量檢測的充電電流監(jiān)控器輸出
Charge Current Monitor Output for Gas Gauging
¾ 自動(dòng)再充電
Automatic Recharge
¾ 充電狀態(tài)輸出引腳
Charge Status Output Pin
¾ C/10充電終止
C/10 Charge Termination
¾ 待機(jī)模式下的供電電流為25μA
25μA Supply Current in Shutdown
¾ 2.9V涓流充電器件版本
2.9V Trickle Charge Threshold
¾ 軟啟動(dòng)限制了浪涌電流
Soft-Start Limits Inrush Current
¾ 單燈使用時(shí)，充滿后燈全滅。
When using a single lamp, the light is completely extinguished after fully charging..
¾ 無鹵產(chǎn)品。
Halogen-free Product.
用途 / Applications
蜂窩電話、PDA、MP3播放器；
Cellular Telephones, PDAs, MP3 Players
¾ 充電座
Charging Docks and Cradles
¾ 藍(lán)牙應(yīng)用
Bluetooth Applications.
