Requiring a minimum of external components, the UDN3625M and UDN3626M are monolithic ICs that provide single-chip control and direct drive solutions for many small, single-phase, unipolar brushless dc motor applications. Integrated into the ICs are a highsensitivity Hall-effect sensor, control and commutating logic, a stable voltage regulator, extensive self and system protective functions, and two high-current saturated npn outputs. Both ICs include thermal shutdown, output over-current limiting, and output transient protection/flyback diodes. The UDN3625M is nominally for 12 V motor applications while the UDN3626M is better suited to 24 V motors.

FEATURES
■ 900 mA/12 V or 400 mA /24 V Operation
■ Speed-Control (PWM) Capability
■ Locked-Rotor Indication
■ Minimum External Components
■ Over-Current Protected
■ Thermal Protection
■ Enhanced Reliability
■ Reduced Cost