Motorola D10 Service Manual page 72

BenQ
3.11 Charging circuit
F1
2
BC807-40W
1
BQ5
3
R62
24K
D2 S1
G2 S2
DZ1
UDZS6.2B
BGND
C75
0.1U
ICTL
R67
From Nausica
C31 BGND
47K(0805)
0.1UF
BGND
BGND
VBAT>4.4 OUTPUT=HIGH
XC61CC4402MR(Tolex)
U16
R70
3 1
NC OUT
10K
4 2
GND VIN
VBAT
BGND
C76
C(0603)
BGND
Description
The charging circuit of 56f16 is composed of over-current protection¡ B
battery over-voltage protection¡ B adaptor over-voltage protection circuit¡ B
charger IC control and sofeware charging control that are controlled by
Nausica (U3).56f16's adaptors are standard linear 3.6V/600mA charger
and switching VPA (cigarette charger) with 6V/400mA output.
The group of BQ5, DZ1, R62, R70, U16, and U21 compose the charger
over-voltage protection circuit and battery over-voltage protection.
The cut-off voltage is 6.8V and 4.4V for each. While the charger voltage
is over 6.8V, the circuit will turn on DZ1 and BQ5 by latching U12.G1 to
stop charging. Software will take over the charging task by controlling
CHARGER IN
1A(0603)
CHARGER_IN
C29
T6
T5 T7
0.1U
TVS
NM.TVS
NM.TVS
RB520S-30
D22
1 2
VCHG
To Nausica
R61
1K
D1
U12
BGND
FDC6506P
G1
3
U11
1 6
ISENSE DRIVE
2 5
GND BAT
3 4
VCC PROG
C73
C74
1UF
0.1U
BGND
C10
BGND
C(0402)
BGND
BGND
VBAT>4.1 OUTPUT=HIGH
VBAT
XC61CC3102MR(Tolex)
U21
U17
3 1
NC OUT
UMH10N
4 2
GND IN
BGND
C78
C77
C(0603)
4.1INV
R30
47K
BGND BGND
VCHG
VR3
R60
J1
2.7K
1
V+
2
SW
3
C30
GND
T12
T11
4
GND
C(0402)
TVS
5
GND
NM.TVS
Power Jack
BGND
VBATBB
4
0.2F(0805)
2 R63 0F(1206)
BQ6
R24
MMJT9435
R65
C72
47K
10UF
BGND
BGND
4.1INV
S2
D1 G2 U6
FDG6303
D2
S1 G1
VBAT<3.1 OUTPUT=LOW
R68
R66
7.5K 7.5K
VBAT
XC61CC4102MR(Tolex)
U18
1 3
OUT NC
BGND
BGND
2 4
VIN GND
BGND
C(0603)
31
Rev 1.0
TP11 TP12
TP13
VBAT
BATTEP
C47 C49
C(0805) C48
C(0805) C58
22P J 33P J
BGND BGND
BGND
JP1
1
2
3
REMOVABLE BATTER