SMB239
APPLICATIONS INFORMATION (CONTINUED)
POR
Set I(charge-max)
YES
Vin >
Standby Mode
Vbat+130mV ?
(Always
NO
(Pause Charge)
Monitored)
10mA trickle charge
(timers off)
YES
Vbat>2.0V?
NO
Vbatt <
Vfloat - 200mV ?
(Always
NO
YES
Monitored)
Optional Operation
(controlled by register)
Regulate Current to
Precharge Mode
Reset t(precharge)
Vbat <Vprechg?
YES
I(precharge)
(<Icharge-max)
NO
NO
Vbat <Vprechg?
Fast Charge Mode
Reset t(charge)
NO
YES
t(precharge)
expired?
NO
Vbat < Vfloat?
YES
NO
Regulate Voltage to
Vfloat
YES
YES
Regulate Current to
I(charge)
<(Icharge-max)
YES
Battery Fault
I(charge) <
I(terrm)?
NO
t(charge) expired?
YES
NO
Terminate Charge
Standby Mode
t(charge) expired?
NO
Vbat <Vprechg?
NO
Terminate Charge
Standby Mode
Vbat < Vfloat-
115mV?
YES
YES
Figure 5 – Functional flow chart.
Summit Microelectronics, Inc
2129 3.0 2/23/2009
15
SUMMIT [ SUMMIT MICROELECTRONICS, INC. ]
