M62256FP

REJ03F0246-0200 Rev.2.00 Jun 16, 2008

Page 8 of 10

3. Discharge Operation

(1) Discharge control

The Dchg SW terminal is used for the forced discharge of the battery. Discharge starts when this terminal stays "L"

0.7 seconds or more. The Dchg IN terminal and the Dchg OUT terminal are used to control discharge. These

terminal contain the feedback function which enables constant current discharge.

(2) Detection of adapter

When the voltage of the battery which has been discharging reaches 5 V or less, the discharge mode has canceled.

(Charging mode takes over.)

(3) Forced ending of discharge

Once the discharge mode is in progress, it is possible to cancel the discharge mode by making the Dchg SW

terminal to "L" once more. (Stays 0.7 seconds or more.)

(4) RESET operation

The RESET circuit goes into operation when the power supply voltage goes 2.8 V (Typ) or lower. The internal logic

circuit are all RESET to the initial states.

(5) Modes setting

The Adapter mode has the highest priority. Modes are switched in the following.

(a) When the power is turned ON

Batt IN causes the charge mode to take over.

Power ON puts the Adapter mode in standby

Adpt IN causes the adapter mode to take over.

(b) When the battery is connected:

Adpt IN causes the adapter mode to take over.

Quick charge:

Adpt IN causes the initial RESET to start and the adapter mode goes into

operation. Adpt OUT starts the charging mode by way of the initial check.

Trickle charge:

Adpt IN sets the charge OFF and the adapter mode takes over.

The charge OFF mode continues after adapter OUT.

Charge OFF:

Adpt IN causes temporary stop. Then, the adapter mode takes over.

Charge standby (Preliminary charge): Continues after Adpt OUT

(c) When the battery is disconnected during the adapter is in operation

Adpt IN

→ Batt OUT → Adpt OUT → Adapter mode standby

Adpt IN

→ Batt OUT → Batt IN

→ Adpt OUT

→ : It is assumed that a different battery connected and the charge mode starts by way of the initial check.