CrossChip CC6420
CC6420 is a one-chip solution for single-coil brushless DC motor/fan with PWM speed control. The chip is designed and manufactured using an innovative advanced high-voltage BiCMOS process that is optimized for Hall sensors and motor drives. It integrates a driver power tube, a voltage regulator module, a high-precision Hall sensor, a chopper offset cancellation module, a Hall signal linear amplification and modulation module, and a digital logic control module.FEATURES
● Built-in high sensitive hall sensor● High efficiency, Zero Current Switch (ZCS) and Zero magnet Switch (ZBS)
● Low noise, using SVPWM technology to realize sine wave control of the motor, reducing electromagnetic noise
● PWM speed control with minimal speed setting
● Strong driving capability, RDSON = 1.5Ω, High output current, up to 450mA
● Wide operating voltage, 3.5V to 18V
● Rotation Detect (RD) and Frequency Generator (FG) are optional
● Protection: Reverse voltage, Thermal Protection, LRP (Lock Rotation Protection), Current Limit Protection
● AGC control
● Intelligent soft start, reduce the motor starting current, reduce the impact on the power supply
● The rotational speed curve is configurable
● ESD (HBM) 6kV APPLICATION
● Single Coil Brushless DC Motor
● Single Coil Brushless DC Fan
GENERAL DESCRIPTION
In terms of motor control, it has a soft-start function, which can eliminate the spike current when the motor starts. The chip comes with a sine wave modulation driver module and a built-in automatic gain modulation module.