Panasonic EB-CR600, Technical Manual

Page: 37 / 45

http://cxema.ru
Current
mode Battery
Voltage
HF nIGNITION EXTINT KBR0
EXT_PWR
_SENSE
Power down New mode
X X X 1 X <0.5V normal OFF
X X X X 0 X X emergency OFF
X X X X 1 1 <0.5V normal OFF
active <4.0V X X 1 0 >1.2V normal restricted
active <4.0V no X 1 1 >1.2V normal charge
active <4.0V yes >2.5V 1 1 X normal OFF
active <4.0V yes <0.5V 1 1 >1.2V normal charge
active <4.0V yes >2.5V 1 0 X normal OFF
active X no X 1 1 >1.2V normal charge
active X yes <0.5V 1 1 >1.2V normal charge
active X yes >2.5V 1 1 X normal OFF
active X yes >2.5V 1 0 >1.2V normal OFF
active X X X 1 0 <0.5V normal OFF
9.5 PowerManagement
The Power supply circuit needs to supply regulated power to the baseband and RF parts, control battery charging
and monitor battery usage.
G600 must achieve 2 types of battery operation - 4 cell Ni-MH and 2 cell Li-ION.
The power supply section consists of four parts;
1. Power-on circuitry,
2. Voltage regulators,
3. Battery charging circuitry,
4. Power fail detection.
In order to reduce the size and weight of the phone, two Li-ION cells have been chosen as the main power source.
To reduce the cost of the phone four Ni-MH cells can be used as the optional power source. The Li-ION standard
battery gives 400mAH (typical) capacity. The optional Ni_MH battery gives 670mAH capacity.
Battery operating voltage range:
4.5V (minimum safe discharge)
6V (maximum fully charged Ni-MH)
8.2V (maximum fully charged Li-ION)
The G600 battery management operates with the following voltage levels:
Battery Voltage Li-ION Ni-MH
B-Icon 3 bar 7.55< 4.90<
B-Icon 2 bar 7.20< <7.55 4.75< <4.90
B-Icon 1 bar 6.00< <7.20 4.50< <4.75
LVA <6.00 <4.50
Issue 1 Section 9 MCUK980101G8
Revision 0 9 - 4 Technical Guide
POWER SUPPLIES