M62244FP
7. Charging-completed judgement
(1) When fast charging is in progress and the charging current falls below the charging-completed current, charging
stops. One second later, the battery voltage is detected, and the IC performs one of the following operations
according to the detected value.
(a) If the voltage is 3.95 V or more, LED1 is turned off and LED2 is turned on. This indicates the completion of
charging.
(b) If the battery-voltage is 2.6 V or more but below 3.95 V, the IC makes the transition to fast charging.
(c) If the battery-voltage is below 2.6 V, the IC enters the abnormal mode.
(2) When the charging current is not below the charging-completed current 240 minutes after the start of fast
charging, charging stops. One second later, the battery voltage is detected, and the IC performs one of the
following operations according to the detected voltage value.
(a) If the battery-voltage is 3.95 V or more, LED1 is turned off and LED2 is turned. This indicates the
completion of charging.
(b) If the battery-voltage is below 3.95 V, the IC enters the abnormal mode.
8. Recharging
On completion of charging, the IC continues to detect the battery voltage. When the voltage is 3.9 V or less, the
timer is initialized and recharging in the form of fast charging starts up.
9. Detecting abnormality
When a condition in the list below is detected, the IC judges that the current state is abnormal and stops charging
(abnormal mode). Other than as described in item (8) below, the battery or adapter is disconnected and then
connected to make operation resume from the abnormal mode .
(1) The battery voltage is 1.0 V or less after 10 minutes in precharge 1.
(2) The battery voltage is 2.0 V or less after 60 minutes in precharge 1.
(3) Charging in the precharge-2 mode has continued for 60 minutes.
(4) The battery voltage is 2.6 V or less during fast charging.
(5) The battery voltage is 2.6 V or less at charging-completed judgement.
(6) The battery voltage is 4.35 V or more and excessive voltage is detected.
(7) The charging current is 1.5 A or more and excessive current is detected.
(8) The adapter voltage (voltage on the Vcc pin) is 6.3 V or more and excessive adapter-voltage is detected. Note,
however, that when 6.1 V or less is detected, the IC returns to a normal state (adapter-voltage standby H mode).
(9) The battery-voltage is below 1.95 V in the precharge-2 mode.
(10) The battery-voltage is below 3.95 V 240 minutes after the start of fast charging.
10. LED display
State
LED1 (red)
LED2 (green)
Battery disconnected
Charging in progress
Charging completed
Temperature-standby mode
Adapter-voltage standby L mode
Off
Off
On
Off
Off
On
Off
Off
Retains the previous state
Retains the previous state
Adapter-voltage standby H mode Blinking
Abnormal mode Blinking
Off
Off
When LED2 (green) is not in use, fixing the LED2 pin to low level selects a blinking period of 0.625 Hz (typ.) for
LED1 (red).
Note: When LED2 (green) is not in use, the LED2 pin must either be pulled up by a resistor or connected to ground.
Rev.1.0, Sep.19.2003, page 13 of 17
RENESAS [ RENESAS TECHNOLOGY CORP ]
