SMB139 View Datasheet(PDF) - Summit Microelectronics
Part Name
Description
MFG CO.
'SMB139' PDF : 27 Pages View PDF
SMB139
APPLICATIONS INFORMATION (CONTINUED)
POR
Standby Mode
(Pause Charge)
NO
Vin >
Vbat+130mV ?
(Always
Monitored)
YES
YES
T(hi)>T>T(lo)?
NO
(Always
Monitored)
Set I(charge-max)
Vbat>2.0V?
NO
YES
Vbat <Vprechg?
YES
Precharge Mode
Reset t(precharge)
3mA trickle charge
(timers off)
Regulate Current to
I(precharge)
(<Icharge-max)
NO
Fast Charge Mode
Reset t(charge)
NO
Vbat <Vprechg?
NO
YES
NO
YES
NO
Vbat < Vfloat?
Regulate Voltage to
Vfloat
I(charge) <
I(terrm)?
NO
YES
Regulate Current to
I(charge)
<(Icharge-max)
YES
NO
t(charge) expired?
YES
t(charge) expired?
NO
Vbat <Vprechg?
t(precharge)
expired?
YES
YES
Battery Fault
Terminate Charge
Standby Mode
NO
Terminate Charge
Standby Mode
Vbat < Vfloat-
115mV?
YES
Summit Microelectronics, Inc
2121 3.0 6/19/2008
14
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