Patent ID: 9698719
Date: 2017-07-04
CPC Classifications: H02P

Claim:
1. A linear vibration motor driver, comprising: an amplitude and temperature testing unit, a gain controller, a coil resistance detector, and an amplifier connected in sequence; wherein the amplitude and temperature testing unit receives a motor drive input signal and a feedback drive signal output by the amplifier, and outputs a corresponding estimated motor amplitude and real-time temperature according to the motor drive input signal and the feedback drive signal; the gain controller receives the estimated motor amplitude and the real-time temperature, and outputs a gain control signal to the amplifier according to the ratio of the estimated amplitude to the maximum amplitude of the motor and the ratio of the real-time temperature and the maximum temperature of the motor respectively; the coil resistance detector tests the gain control signal and acquires an AC impedance signal corresponding to the motor drive input signal, and the AC impedance signal is output through the amplifier; and the amplifier adjusts magnification according to the gain control signal, amplifies the motor drive input signal according to the magnification and outputs the feedback drive signal to drive the motor.