ME4084 is a 24V single-section lithium-ion battery constant voltage constant current charge management chip, the maximum charging current can reach 600mA (SOT23-5, FBP2*2-6L), 800mA (DFN2*2-8L), 1A(ESOP8). Because the linear charger will be seriously heated in the case of large pressure difference between the input and output, its internal thermal feedback circuit can control the chip temperature during the charging process, and adjust the charging current to a lower level to adapt to the corresponding system heat dissipation requirements.     The addition of few external components makes it ideal for portable applications.

    The ME4084 does not require current detection resistors or external isolation diodes for anti-backflow applications. The charging cut-off voltage is fixed at 4.2V, and the charging current can be adjusted by external resistance. When the charging current reaches 1/10 of the constant current, the ME4084 will terminate the charging.

    When the input voltage (adapter or USB) is removed, the ME4084 goes into sleep mode. The charging path is automatically turned off inside the chip, and the input voltage becomes low. At this time, the battery leakage current is reduced to less than 2uA. When the ME4084 is powered and the battery is removed, the chip current is reduced to 100uA to reduce system losses.

    The ME4084 also features battery temperature detection, input undervoltage locking, automatic recharging, and two charge indication pins.

Maximum input voltage 24V, improve system reliability

Programmable charging current up to :600mA (SOT23-5, FBP2*2-6L), 800mA (DFN2*2-8L), 1A(ESOP8)

Anti-battery reverse connection protection function

Internal thermal feedback protection function, control system in a reasonable charging range

No MOSFETs, detect resistors or isolate diodes

Single section complete linear charger

Constant current and constant voltage switching

Accuracy up to ±1% of 4.2V fixed charge cut-off voltage

Automatic recharging function

Charging status dual output, no battery and fault status display

C/10 Termination of charging

Standby current 100μA

Input overvoltage protection: 6.5V

2.9V Trickle switch threshold

Soft start limits inrush current