Description

The FAH4830 is a high-performance enhanced haptic drive for mobile phone and other hand-held devices. The haptic driver takes a single-ended PWM input signal to control a DC motor. It can drive both Eccentric Rotating Mass (ERM) and Linear Resonant Actuator (LRA) motors. The device utilizes an external 10 kHz to 50 kHz PWM signal capable of meeting the wide range of resonant frequencies.

The FAH4830 has its own register maps accessible via I2C serial communication. A gain control setting can be used to help prevent PWM noise from getting into the motor and to control the maximum output voltage on the motor. For ERM motors, the over-drive control block is designed to control the inertial momentum of the motor.

Features

■ Direct Drive of ERM and LRA Motors

■ External PWM Input (10 kHz to 50 kHz)

■ External Motor Enable/Disable Input

■ Internal Mode-Select Register: ERM or LRA

■ Low Standby Current: <500 nA

■ Fast Wake-up Time

■ Nearly Rail-to-Rail Output Swing

■ Register-Based Control by I2C

■ Over Driving Motor Control

■ Under-Voltage, Over-Current, and Over

Temperature Protections

■ Settable Filter and External Gain Control

■ Package: 10-Lead MLP

Applications

■ Mobile Phones

■ Handheld Devices

■ Any Key-Pad Interface