ACE4704

Fully 5A, 4cell Standalone Li-ion Battery Charger

VER 1.2

6

An overvoltage comparator guards against voltage transient overshoots (>8% of regulation voltage). In

this case, P-channel MOSFET are turned off until the overvoltage condition is cleared. This feature is

useful for battery load dump or sudden removal of battery.

The charging profile is shown in Figure 2.

Figure 2 The Charging Profile

Application Information

Undervoltage Lockout (UVLO)

An undervoltage lockout circuit monitors the input voltage and keeps the charger off if VCC falls below

6V(Typical).

Trickle Charge Mode

At the beginning of a charge cycle, if the battery voltage is below 11.2V, the charger goes into trickle

charge mode with the charge current reduced to 15% of the full-scale current.

Charge Current Setting

The full-scale charge current, namely the charge current in constant current mode, is decided by the

following formula:

ICH=200 mV / Rcs

Where: