MP2615

– 2A, 1- CELL OR 2- CELL LI-ION BATTERY CHARGER

MP2615 Rev. 1.0

www.MonolithicPower.com

12

1/16/2014

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OPERATION

The MP2615 is a peak current mode controlled

switching charger for 1- or 2- cell lithium-ion and

lithium-polymer battery. The MP2615 integrates

both the high-side and low-side switches of the

synchronous BUCK converter to provide high

efficiency and save on PCB area.

Charge Cycle (Mode change: TC CC CV)

loops to achieve highly-accurate constant current

(CC) charge and constant voltage (CV) charge.

MP2615 stays in trickle-charge mode and the

output of charge current loop COMPI dominates

the control. The battery is charged by a trickle-

charge mode till the trickle-charge timer is

triggered, charging will be terminated.

The MP2615 will enter constant-current charge

mode once the battery voltage rises higher than

When the battery voltage rises over full battery

voltage

the

charger

enters

into

constant-voltage mode. In constant voltage mode,

precisely and the charge current will fall naturally

due to the existing equivalent internal resistance

of the battery. For the operation flow chart,

please also refer to Figure 4.

CC Charge

Threshold

CV Charge

Threshold

CC

Charge

Charge

Full

TC Charge

Current

CC Charge

Current

CV

Charge

Auto-

recharge

Auto-recharge

Threshold

Trickle

Charge

Figure 2: Li-ion Battery Charge Profile