Power Supply Asic - Siemens C45 Repair Documentation

Overview of HW Structure
All power supply functions of the mobile phone, except the RF-Part, are carried out
by the power supply ASIC (D361)
General:
The pin POWER of the I/O-Connector is used for charging the battery.
For accessories, which provide a variable charging current, the current will
be set via a pin SB
Car Kits etc.).
- The S45/ME45 power supply is unregulated and cannot be controlled by
the SB signal.
- The SB signal is used to distinguish between various chargers.
The following restrictions must be considered:
The phone cannot be operated without battery.
-
The phone will be damaged if the battery is inserted the wrong way
-
- In the charging branch a fuse element is inserted against over current.

5.2 Power Supply ASIC

The power supply ASIC (D361) contains the following functions:
Control of "Switch On" of the mobile phone via the
-
Recognition of external chargers connected on POWER.
-
Control of "Switch On" of the mobile phone via the
-
- Watchdog monitoring
Control of mobile phone "SWITCH OFF" via
-
- "Switch off "of mobile phone in the case of overvoltage at battery connection.
Generation of RESET
-
- Voltage generation via "Linear regulator
Voltage generation via "Linear regulator
-
Voltage generation via "Linear regulator
-
Battery charge support: interrupted if there is an over-temperature
-
Software-controlled switching of voltage supply for the accessories
-
- Light switching
Voltage generation for "SIM-CARD"
-
- VIBRA switching
Ringer tone switching
-
- Audio switching
Switch "ON" sequence
- Falling edge recognition KB7, or RTC_INT
-
Generation of the "2,07; 2,65; 2,9" voltages
-
Generation of the "RESET_2,0V and RESET_2,65V"
-
32,768 KHz oscillator
-
Generation of the "Watch Dog" signal through the EGOLD+
after "POWER_ON"
-
26MHz oscillator
V1.0
C45, M50 AND MT50
(current byte) (e.g. S25 chargers corresponding to
signal for EGOLD+ and Flash
2.90 V
2.65 V
2.07 V
Page 23 of 46
Company Confidential © Copyright Siemens AG
ON/OFF switch.
ON/OFF1 (RTC)
WATCHDOG_µP connection.
"
"
"
ICM MP CCQ ST
05/02