EUM6167 Datasheet, PDF (1/1 Pages) Eutech Microelectronics Inc – Single-Phase Full-Wave Pre Driver for Fan Motor

EUM6167
Single-Phase Full-Wave Pre Driver
for Fan Motor
DESCRIPTION
EUM6167 is a pre-driver for single coil brushless DC
motor. With an external PWM input signal, EUM6167
can control the speed of DC motor. It is an interface
between a HALL IC and a single coil motor. The
functions built in EUM6167 include PWM control
mode, minimum speed mode, soft-switching time, fan
tachometer, lock protection, auto restart, Hall Bias and
current limiter.
PWM mode controls the external PMOS-NMOS FET
in low noise and low vibration. Minimum speed mode
makes the lowest speed of motor settable.
Soft-switching time can cut the ineffective current
when phase change is not set. If the motor is stalled by
external force or obstacles, overdrive current may incur
coil overheating. To prevent this, the lock protection
circuit shuts down the external power devices for a few
seconds after the motor is locked. Then auto restart
circuit will resume to power up these devices. The
protection and power up time are settable by external
capacitor. EUM6167 has FG output and RD output.
FEATURES
z Single-phase Pre Driver
z PWM Control Mode
z Soft-Switching
z Built in Hall Bias
z Minimum Speed Settable
z Current Limiter
z Lock Protection and Auto Restart
z FG and RD Output
z 12V/24V/48V Power Supplies Applicable
z Available in TSSOP-20 Package
z RoHS Compliant and 100% Lead (Pb)-Free
APPLICATIONS
z PC/Server FAN Motor
Application Circuit
DS6167 Ver1.3 Feb. 2009
Figure 1. 12V Application Circuit
1