EUM6883
800mA BTL Linear Fan Motor Driver
DESCRIPTION
EUM6883 is a single-phase full wave DC fan motor
driver. It is used as an interface between a HALL IC
and a single coil brushless motor. With its BTL linear
control and low saturation output stages, EUM6883
silently and efficiently drives a fan motor. The
functions built in EUM6883 are linear control drive
mode, fan tachometer, lock detection, automatic restart,
Hall Bias and thermal shutdown. When output voltage
changes from L to H (or H to L), linear control mode
gently drives the output stage. This makes EUM6883
suitable for the electronics equipment which required
low noise and high reliability. If the motor is stalled by
the external force, overdrive current may incur coil
overheat or burning. To prevent this, the lock detection
circuit shuts off the driver. The automatic restart circuit
resumes powering up the driver after a few seconds.
Rotation detection open drain output is pulled down
when a motor runs. FG is the Fan tachometer output,
and HB provides bias supply for a Hall sensor.
FEATURES
Linear Control for Single-Phase Full Wave Drive
Wide Input Range
1.8V~13.8V
Low Saturation Output Voltage 0.5V @250mA
FG Tachometer Output
Lock Detection, Automatic Restart
- RD = L when Rotation; RD = H when Stop
1.5V Hall Bias
Thermal Shutdown Protection
Available in MSOP-10 Package
RoHS Compliant and 100% Lead (Pb)-Free
APPLICATIONS
CPU Cooling Fan
Car Audio Cooler
Power Supply Cooling Fan
Block Diagram
Figure 1.
DS6883
Ver0.2
July 2009
1
EUTECH [ EUTECH MICROELECTRONICS INC ]
