Built-In Charger Circuit; Outline - Canon MV750i E Service Manual

3. Built-in Charger Circuit

DC
MAIN P.C.B.
P.C.B.
CN3201
3
DC
2
JACK
1
BATTERY
CN3202
5,6
3,4
2
D
1
B

3-1 Outline

The main circuit elements and their functions are as follows.
(1) IC100 : MODE MI-COM
• Charging voltage and charging current control
• Detection and display of charging progress
• Error discrimination and display
• Battery type discrimination and DC jack input detection
(2) IC 1800 : Charge control IC
• Signal amplification for detecting charging current
• Charge switch control
• Trickle charge switch / quick charge changeover
(3) Q1800/Q1801 : MOS form FET
• Power supply changeover switch
DC JACK SW
DC+
DC-
Q1800
BATT+
BATT-
BATT INFO AD
BATT E3 E3
Fig. 4
MV750i E, MV730i E, MV700i E, MV700 E, MV690 E
RESET
Q1801
IC1800
CHARGE
CONTROL
3 5
6
7
10
9
11
6
TECHNICAL DESCRIPTION
IC103
73 71
BATT AD
87
IC100
MODE
MI-COM.
CHG-CTL1
41
CHG-CTL2
99
CHG-CTL3
100
A/D I
90
89 88