ACE4559P

150mA Single Cell Li-ion Battery Charger, 0.1mA Termination, 45nA Battery leakage Current

VER 1.1

11

When charging, transient loads on the BAT pin can cause the PROG pin to fall below 100mV for short

periods of time before the DC charge current has dropped to 1/10 of the programmed value. The 1ms

premature charge cycle termination. Once the average charge current drops below 1/10 of the

programmed value, the ACE4559P terminates the charge cycle and ceases to provide any current

through the BAT pin, the chip will be put into standby mode. In this state, all loads on the BAT pin must be

supplied by the battery.

The ACE4559P constantly monitors the BAT pin voltage in standby mode. If this voltage drops below the

again supplied to the battery. The state diagram of a typical charge cycle is as below: