EUM6898R Datasheet, PDF (1/1 Pages) Eutech Microelectronics Inc – Single-Phase Full-Wave Motor Driver with Direct PWM Input

EUM6898R/S
Single-Phase Full-Wave Motor Driver
with Direct PWM Input
DESCRIPTION
EUM6898R/S is a motor driver for single coil
brushless DC motor. With its high efficient direct
PWM control mode, EUM6898R/S can control the
speed of brushless DC motor. It integrates minimum
speed mode, stop mode, adjustable speed slope control
mode, soft start mode, fan tachometer, lock protection,
auto restart, TSD, OCP and noise controlled mode.
Noise control mode optimizes low noise performance
with a SW pin’s resistor according to different
requirements, and can drive the BLDC fan motor in
low noise and low vibration. Minimum speed mode
can set minimum motor speed by presetting RMIN
voltage. Stop speed mode can set stop PWM duty by
presetting STOP voltage. The adjustable speed slope
control mode can set fan speed slope by presetting SL
voltage. Soft start suppresses high peak start-up current,
which will also provide a reliable start-up even for low
rotation speed. If the motor is stalled by external force
or obstacles, overdrive current may incur coil overheat.
To prevent this, lock protection circuit can shut down
the internal power devices for a few seconds after
motor lockup. Then auto restart circuit will try to
power up these devices. EUM6898R/S has FG output.
Application Circuit
FEATURES
Single-phase Full-wave Driver
Few External Components
Built-in Input Surge Protection, No Zener Diode
Need
External Programmable Soft Start and Soft
Restart Function
Wide Input Range 3.0V~18V
Direct PWM Fan Speed Control
Programmable Minimum Fan Speed
(EUM6898R only)
Programmable Noise Control by an External
Resistor
Stop Mode PWM Duty Adjustable
(EUM6898S only)
Fan Speed Slope Control
Built-in Over Current Protection Function
Lock Protection and Auto Restart
Built in Hall Bias
Fan Rotation Speed Feedback FG Output
Available in TSSOP-16 and TSSOP-14 (EP)
Packages
RoHS Compliant and 100% Lead (Pb)-Free
Halogen-Free
APPLICATIONS
Personal Computer’s Power Supply Radiation
and CPU/VGA Cooler
DS6898R/S Ver1.2 July 2016
Figure 1. TSSOP -16 Typical Application Circuit
1