Vibrator Interface - LG -T300 Service Manual

3.15 Vibrator Interface

The haptic motor driver is a single chip supply haptic driver for improved sensory experience in mobile
phone and other handheld devices. This function is capable of driving up to 250mA at 3V supply voltage
and has overcurrent limitation function. Near rail-to-rail output swing under load ensures sufficient
voltage drive for most ERM (Eccentric Rotating Mass)/LRA (Linear Resonant Actuator) type actuators,
while the differential output drive allows the voltage polarity across the actuator to be reversed quickly.
Reversing the voltage gives the haptic motor driver the ability to drive an actuator both clock-wise and
counter clock-wise.
These features fast turn on time, and a wide input voltage range for precise speed control. A low power
shutdown mode minimizes power consumption.
Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Figure 3-15-1 Vibrator Driver Block Diagram
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3. TECHNICAL BRIEF
3. TECHNICAL BRIEF
LGE Internal Use Only