SS6781ACSTR datasheet(12/18 Pages) SSC

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SS6781A(G)

1/11/2005 Rev.2.10

Power ON

LED Flash 3 Times

VBT in Normal

Range

VNTC<0.72 VCC

If VNTC>0.29VCC

Discharge

Enabled

LED's Display Abnormal,

ICON ON,

Safety Timer Reset

SEL3>VCC-0.3V

or VCC/2-0.4V>SEL3

>1.4V

Discharge

Finished

LED's Display Fast Charge, ICON OFF

Safety Timer Counts

Initial Timer

Finished

Peak Timer Period

has Finished

0.25% Decline of VBT

is Detected

∆T/∆ t

has Reached

Safety Timer Period

has Finished

LED's Display

Battery Fulll,

Fast Charge

Finished,

Trickle charge

Starts

∆T/∆t Detector,

∆V Detector,

Peak timer are all

Disabled

LED's Display,

Abnormal,

ICON ON,

Safety Timer Reset

SEL3>VCC-0.3V

or VCC/2-0.4V>SEL3

>1.4V

Battery Replacement

Yes

∆T/∆t Disabled

Fig. 16

Function Flow Chart of SS6781A

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