A1445 Description
TheA1444 andA1445 are full-bridge motor drivers designed to drive low-voltage brushless DC (BLDC) motors in applications that require rotor speed control and fast rotor start-stop cycles. A high density CMOS semiconductor process allows the integration of a Hall element, a full-bridge output driver, and PWM speed control logic into one monolithic IC. mutation of the motor is achieved by use of a single Hall element...
A1445 Key Features
- Low voltage operation: 1.8 to 4.2 V
- Externally controlled motor speed regulation
- Fast motor startup and braking function allows faster
- Reverse voltage protection on the VDD and S¯¯L¯¯E¯¯E¯¯P pins
- Output short circuit and thermal shutdown protection
- Soft switching algorithm for reduced audible switching
- Chopper stabilization reduces Hall signal offset drifts and
- Sleep mode pin allows device enable/disable for reducing average power consumption
- Antistall feature guarantees continuous rotation
- Single-chip solution for high reliability