ACE4704
Fully 5A, 4cell Standalone Li-ion Battery Charger
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:
ICH is the full scale charge current
RCS is the resistor between the CSP pin and BAT pin
VER 1.2
6
ACE [ ACE TECHNOLOGY CO., LTD. ]
