XYT4054E summarize：
The XYT4054E is a linear lithium-ion battery linear charger with a complete trickle/constant current/constant voltage three-stage charging mode. Its input/output port has a voltage tolerance of up to 10.5V, making the XYT4054E suitable for a variety of USB power supply and adapter power supply operating environments. Due to the internal PMOSFET architecture and anti-reverse charging circuit, external detection resistors and isolation diodes are not required. The thermal feedback adjusts the charging current to limit the chip temperature during high-power operation or high ambient temperatures.
The charging voltage is limited to 4.2V and the charging current is regulated by an external resistor. After reaching the target charging voltage, the XYT4054E will automatically end the charging process when the charging current is reduced to 1/10 of the set value. When input voltage (AC adapter or USB electrical
When the source is removed, the XYT4054E automatically enters a low current state, reducing the battery leakage current to less than 2uA. The XYT4054E can also be set to stop working so that the power supply current is reduced to 35μA.
XYT4054E built-in anti-reverse connection function, in the lithium battery reverse connection to ensure that the IC will not be broken down resulting in battery self-discharge accidents.
Other features include: charge current monitoring, undervoltage latching, automatic recharging and full and start charging signs.
XYT4054E peculiarity：
ogrammable charging current up to 500mA.
No MOSFETs, sensing resistors and blocking diodes required
The small size enables complete linear charge management of lithium-ion batteries
Constant current/voltage operation and heat regulation allow for maximum battery management efficiency without the risk of overheat
Manage a single lithium-ion battery from a USB port
The preset charging voltage is 4.2V±1%
Charge current output monitoring
Charging status indicator
1/10 charge current terminated
35μA current when stopped working
2.9V trickle charging threshold voltage
Soft start limits the surge current current
Battery reverse protection
XYT4054E Apply：
Lithium battery charger
XYT4054E引脚排列及说明：
XYT4054E功能框图：
XYT4054E典型应用：
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