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KX-TG6811RUB/KX-TG6811RUM/KX-TG6812RUB/KX-TG6821RUB/KX-TG6821RUM/KX-TG6822RUM/KX-TG6881RUB/KX-TG6891RUB/KX-TGA681RUB/KX-TGA681RUM/KX-TGA20EXB
4.4.5.
Power Supply Circuit
The power supply voltage from AC adaptor is converted to VBAT (3.0V) in 3.0V Regulator (IC302). And +3.0V for peripherals
and analog part is insulated from VBAT by Doubler of BBIC.
Circuit Operation:
and analog part is insulated from VBAT by Doubler of BBIC.
Circuit Operation:
5.5V
VBAT
RSTN(Reset)
pin 54
VBAT
pin 10
pin 57
pin 9
pin 15
IC501
IC302
IC601
BBIC
DOUBLER OUT
For peripherals
For peripherals
VDDC (1.2V)
AC Adaptor
3.0V
REGULATOR
FLASH
IC611
EEPROM
+3.0V
STM/CKM
Receive
Amp.
MSG LED
Startmonitor
(IC501 57pin)
VDDC (1.2 V)
VBAT
Reset (RSTN)
(IC501_54 pin)
(IC501_54 pin)
BBIC chip initialize
(CKM/STM)
RF Part
LED
(TAM COUNTER)
(TAM COUNTER)
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