M
ODEL
SL900A V
ERSION
V_1.0
P
REPARED BY
H/W
D
ATE
2006.06.30
S
UBJECT
T
ECHNICAL
M
ANUAL
P
AGE
41/51
SL900A
T
ECHNICAL
M
ANUAL
switch of LED can sink 150mA to drive up to 10 LEDs simultaneously for backlight. The switch of
vibrator can sink 250mA for a vibrator motor. The switch of alerter can sink 300mA to drive the
beeper. And all the open-drain output switches are high impedance when disable. ALERTER pin is
dedicated to Main KEY BackLight LED, VIBRATOR pin is dedicated to Vibrator Motor.
11.
Battery Charger
BATUSE pin can set MT6305 to fit the battery type. When BATUSE is set low, Li-ion battery is used.
MT6305 charges the battery in three phases : pre-charging, constant current mode charging, and
constant voltage mode charging. The circuitry of MT6305 combines with a PMOS transistor, diode,
current-sense resistor externally to form a simple and low cost linear charger. MT6305 is available
pulsed top-off charging algorithm by the CHRCNTL pin control from baseband chipset.
Figure 27. Charger and Voltage Detection
Figure 28. Li-Ion Battery Charging Profile.
III.
TOME808
( CMOS Camera Module )
Summary of Contents for SL900A
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