The UCC3626 motor controller IC combines many of the functions required to design a high performance, two or four quadrant, 3-phase, brushless DC motor controller into one package. Rotor position inputs are decoded to provide six outputs that control an external power stage. A precision triangle oscillator and latched comparator provide PWM motor control in either voltage or current mode configurations. The oscillator is easily synchronized to an external master clock source via the SYNCH input. Additionally, a QUAD select input configures the chip to modulate either the low side switches only, or both upper and lower switches, allowing the user to minimize switching losses in less demanding two quadrant applications.