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EMC5040,1.2A,13.5V輸入單節線性鋰電池充電IC

EMC5040】1.2A,13.5V輸入單節線性鋰電池充電IC

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EMC5040 詳細介紹

EMC4054概述
EMC5040完整的單節鋰離子電池用恒定電流/恒定電壓線性充電器。其TDFN-10封裝與較少的外部組件數目使得EMC5040成為便攜式應用的理想選擇。而且,EMC5040是專為在 USB 電源規范內工作而設計的。采用了內部 MOSFET 架構,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行調節,以便在大功率操作或高環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電阻器進行外部設置。當充電電流在達到最終浮充電壓之后降至設定值的 1/10 時,EMC5040 將自動終止充電循環。當輸入電壓 (交流適配器或 USB 電源) 被拿掉時,EMC5040自動進入一個低電流狀態,將電池漏電流降至 2µA 以下。可將EMC5040置于停機模式,從而將供電電流降至 25µA。
The EMC5040 is a complete linear charger for single cell lithium-ion batteries. With small TDFN-10 package and few external components, EMC5040 is well suited for portable applications. In addition, the EMC5040 is specifically designed to work within USB power specifications.  No external sense resistor and blocking diode are required. Charging current can be programmed externally with a single resistor. The built-in thermal regulation facilitates charging with maximum power without risk of overheating. 
The EMC5040 always preconditions the battery with 1/10 of the programmed charge current at the beginning of a charge cycle, after it verifies that the battery can be fast-charged. The EMC5040 automatically terminates the charge cycle when the charge current drops to 1/10th the programmed value after the final float voltage is reached. 
The EMC5040 features 13.5V maximum rating voltage for AC adapter, and it provides the charge current up to 1.2A. Other features include battery temperature monitoring, reverse current protection, shutdown mode, charging current monitor, under voltage lockout, automatic recharge and status indicator.

EMC5040技術特性
Programmable charge current up to 1.2A
No MOSFET, sense resistor or blocking diode required
Complete linear charger in TDFN-10 for single cell li-ion batteries
Thermal regulation maximizes charge rate without risk of overheating
Thermistor input for temperature qualified charging
Charges single cell Li-ion batteries directly from USB port.
Preset 4.2V charge voltage with ±1% accuracy
Automatic recharge
Charge status indicator
C/10 charge termination
Battery reverse leakage current less than 1uA


EMC5040應用領域
Wireless handsets
Hand-held instruments
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