Vibrators - LG GT540 Service Manual

3. TECHNICAL BRIEF

3.16 Vibrators

The strength of vibration is determined by the duty cycle of PWM (VIB_PWM)
U501 : SM100 is Linear motor driver IC.
VREG_MOTOR_3.3V
R502
1K
1%
VIB_PWM
R503
680
1%
LGE Internal Use Only
R505
BYPASS
C1
_SHUTDOWN
B1
R501 51K
IN+
C2
1%
R500 51K
IN-
C3
1%
U501
R504
C501
C557
0.1u
Figure. Linear Moter Drive IC Schematic
Figure. Vibrator Block Diagram
- 68 -
150K
1%
GND
B2
VO-
A1
VO+
B3
VDD
A3
150K
1%
10n
C500
1u
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Only for training and service purposes
VIB_M
VIB_P
KPD_PWR_N