Panasonic EB-X70 - Your Phone

TECHNICAL DESCRIPTION
Issue 1 Section 4 PMCD030901C8
Revision 0 – 20 – Service Manual
4.8. Power Supplies
4.8.1 Introduction
Figure 4.11: Power Supply Block Diagram
The Power Management Block consists of six parts as follows:
1. Power Source
2. Power On/Off Control
3. Power Source Failure detection
4. Voltage Regulation
5. Battery Charging & Monitoring
6. Accessory Control
4.8.2 Power Source
The battery comprises a single Lithium-Ion (Li-Ion) cell with a nominal voltage of 3.7 V and 680 mAh capacity. This type of
battery has an advantage in weight and size over Nickel Metal Hydride (NiMH) cells.
EXTPWR
nACC-SENSE
I/O
CN2702
ACC±PWR±IO
VBAT
BAT-TEMP
MAIN
BATTERY
U120
SYREN
VRDBB
D18VMEM
VRIO1
VRABB
A28BB
VRRAM
VR
VR
VR
VRIO2
VR
D15V
D18V
D28VB
VRRTC
D15RTC
VRSIM
MICBIAS
U100
CALYPSO
CN300
(SIM)
U140
FLASH
+ SRAM
VBACKUP
BACKUP
CELL
ONOFF
RESPWONZ
INT2
RF_EN
U602
REG
VSTX
VSRF
VBAT
MIC
EXT-IRQ
UPR
VR
VSDBB
VR
KEYPAD
BACK-
LIGHTS
VBAT
CAMERA
LCD
BACK-
LIGHTS
ACC±PWR±EN
Q400
VR
VRMEM
U142
REG
VBAT
U500
BLUETOOTH
U301
MELODY
GENERATOR
U141
REG
D18V
D28V
TR201 /
TR202
SW
D18VMEM
ONNOFF
ONNOFFONNOFF
VBAT
U141
REG
VBAT
Q202
10696-1
All manuals and user guides at all-guides.com