SGM4054,PDF数据表下载

SGM4054 pdf资料下载The SGM4054 is a complete constant-current/constantvoltage linear charger for single cell lithium-ion batteries. Its SOT23-5 small package and low external component count make the SGM4054 ideally suited for portable applications. Besides wall adapter’s 5V power supply, the SGM4054 is specifically designed to work within USB power specifications. SGM4054 is high integrated charger, there is no external current sense resistor and MOSFET, 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 SGM4054 automatically terminates the charge cycle when the charge current drops to 1/10th the programmed value after the final float voltage is reached. When the input supply (wall adapter or USB supply) is removed, the SGM4054 automatically enters a low current state, dropping the battery drain current to less than 3μA. The SGM4054 can be put into shutdown mode, reducing the supply current to 25μA. Other features include charge current monitor, undervoltage lockout, automatic recharge and a status pin to indicate charge termination and the presence of an input voltage. SGM4054YN5/TRDatasheet pdf资料数据表下载