Integrated Hall sensor for brushless DC motor

It presents one integrated hall sensor based on compound magnetic path design of double magnets. The principle is that, by inducing the vertical and parallel fields produced by the rotating magnet, the Hall components can output the voltage signals, which indicate rotor operation. The voltage signals are then processed by inner circuit into both commutating signals (U, V, W signals) and absolute position signals (including analog and PWM signals). In high speed region, only the U, V, W signals are necessary, and the max speed is able to achieve 30000 rpm. In low speed region, the precision of absolute position signals is10bit, and the resolution can reach high up to 12 bit.