Deeply Discharged Batteries; Accessory Control - Panasonic EB-G60 Service Manual

Personal cellular telephone

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The phone will be power down two minutes after generating a Low battery Alarm.

Battery charging is controlled by the CPU within the phone. If external power is detected and the temperature is within

specified limits, the charger starts the rapid charge algorithm.

When the battery is fitted, the charging algorithm is determined by constant voltage and constant current control with

time, temperature and voltage safeguards. A current limit not greater than the maximum charge current for any battery

option must be provided by the external power source.

5.16.2. Deeply Discharged Batteries

In the case of deeply discharged batteries, there may not be enough power in the battery to initiate charging. In this case,

the charging circuit automatically starts to trickle charge the battery until there is enough power to switch on the phone.

The telephone can detect accessories connected to the I/O connector by pulsing ACC_PWR high and checking

ACC_ID. It can then communicate with the detected peripheral and control set ACC_PWR where required, as detailed in

the following table.

Input

Output

ACC_ID

ACC_PWR

ACC_ID

High

ACC_ID

High

100K

Peripherals

Data cable

Digital Camera

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