EUM6179

EUM6179/6179A Single-Phase Full-Wave Motor Driver for Fan Motor DESCRIPTION EUM6179 is designed specifically for electronic commutation of single coil brushless DC motor applications. It is intended to be used as an interface between a HALL IC and a single coil motor. The functions built in EUM6179 are soft switched drive www.DataSheet4U.com mode, fan tachometer, lock detection, automatic restart, thermal shut-down and Hall Bias. Soft switched drive mode makes the output signal gentle when the amplitude of HALL signal is small. Oppositely, it makes the output signal steep when the amplitude of HALL signal is big. If the motor is stalled by external force or obstacles, overdrive current may incur coil overheat/burning. To prevent this, lock detection circuit can shut down the driver for 5 seconds after motor lockup. Then automatic restart circuit will try to power up the driver for 500ms every 5 seconds. For different application, fan tachometer circuit has FG output for EUM6179 and FG/2 output for EUM6179A. FEATURES z z z z z Low Voltage 2.2V~6V Single-Phase Full-Wave driver System Soft switched drive Lock detection, Automatic restart Tachometer Output FG output for EUM6179, FG/2 output for EUM6179A Hall Bias Thermal Shutdown Protection FG Output RoHS Compliant and 100% Lead (Pb)-Free z z z z APPLICATIONS z NB FAN Motor Application Circuit and Block Diagram Figure 1. DS6179 Ver1.0 Feb. 2007 1 EUM6179/6179A Pin Configurations Package Type Pin Configurations MSOP-8 www...