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PDF EUM6867 Data sheet ( Hoja de datos )
| Número de pieza | EUM6867 | |
| Descripción | PWM Pre Driver | |
| Fabricantes | Eutech Microelectronics | |
| Logotipo |  |
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Preliminary EUM6867
PWM Pre Driver for DC Fan Motor
DESCRIPTION
EUM6867 is a pre driver for single coil brushless DC
motor, specially designed for 12V power supply
application. With an external PWM input signal,
EUM6867 can control the speed of DC motor. It is an
interface between a HALL IC and a single coil motor.
The functions built in EUM6867 include soft start
mode, 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. With soft start function.
EUM6867 can drive motor from slow speed to fast
speed in a settable time by setting the external
capacitor between S-S and 5VREG. 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 overheat/burning. To prevent this, lock protection
circuit can shut down the external power devices for a
few seconds after motor lockup. Then auto restart
circuit will try to power up these devices. The
protection and power up time are settable by an
external capacitor. EUM6867 has FG output.
Application Circuit
FEATURES
z Single-phase full-wave Pre Driver
z PWM Control Mode
z Soft Start Function
z Soft-Switching Time
z Minimum Speed Settable
z Lock Protection and Auto Restart
z FG Output
z Current Limit Protection
z Available in TSSOP-16 Package
z RoHS Compliant and 100% Lead (Pb)-Free
APPLICATIONS
z Personal Computer’s Power Supply Radiation
and CPU Cooler
DS6867 Ver0.1 Nov. 2007
Figure 1.
1
1 page  
Tel: 0755-8398 3377 / 135 9011 2223
http://www.gofotech.com
Preliminary
Electrical Characteristics (continued)
(Unless otherwise specified Ta =25°C, VCC = 12V)
Parameter
Conditions
Lock Protection Block
IS-S S-S pin charge current
VS-S=1V
FG Signal Output
VFGL FG low voltage
IFG = 5mA
IFGL FG leakage current
VFG = 19V
IVTH/
IRMI
VTH/RMI pin bias current
CPWM=VTH/RMI=2V
* This product is not designed for protection against radioactive rays.
EUM6867
EUM6867
Min. Typ. Max.
Unit
0.5 A
0.15 V
30 A
0.1 A
DS6867 Ver0.1 Nov. 2007
5
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet EUM6867.PDF ] | |
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