SL4054 Linear Li-Ion Charger with SOP Package and Low External Component Count is Suited for Portable Applications

时间： 2023-09-25 来源：SLKOR News

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Today, we will introduce the SL4054 Linear Li-Ion Charger.

Fig.1

Description:

The Slkor®4054 is a complete constant-current/constant-voltage linear charger for single-cell lithium-ion batteries. Its SOP package and low external component count make the SL4054 ideally suited for portable applications. Furthermore, the SL4054 can work with USB and wall adapters. No blocking diode is required due to the internal PMOSFET architecture and prevents to negative Charge Current Circuit. 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 SL4054 automatically terminates the charge cycle when the charge current drops to 1/10th the programmed value after the final float voltage is reached. Removing input power automatically puts the SL4054 into a low current mode to reduce the battery's leakage current to below 2uA, and the shutdown mode reduces the supply current to 45µA. SL4054 Other features include a current monitor, under voltage lockout, automatic recharge, and two status pins to indicate charge termination and the presence of an input voltage. The Slkor® SL4054 is available in a SOT23-5 (ThinSOT^TM) package.

Characteristics:

● The programmable charging current as high as 500mA;

● In no need of external MOSFET, sense resistors, or backward diodes;

● Constant current/constant voltage mode operation, with the function of thermal protection;

● Charging for lithium batteries through the USB port:

● Preset charging voltage with an accuracy of 1%;

● The current of 20μA in the standby mode:

● The trickle charging voltage of 2.9V

● The limitation of the surge current with a soft start

● The SOT23-5 package

Applications:
USB-Powered Charging, Handheld Computers, MP3 Players, Bluetooth Headphones, Digital Cameras, Cellular Telephones, PDA.

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本文由三年不鸣转载自SLKOR News，原文标题为:【Daily Highlight】SL4054 Linear Li-Ion Charger，本站所有转载文章系出于传递更多信息之目的，且明确注明来源，不希望被转载的媒体或个人可与我们联系，我们将立即进行删除处理。

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