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PDF EUM6804 Data sheet ( Hoja de datos )
| Número de pieza | EUM6804 | |
| Descripción | PWM Fan Motor Driver | |
| Fabricantes | Eutech Microelectronics | |
| Logotipo |  |
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EUM6804
PWM Fan Motor Driver with Slope
Control and Low Duty Startup
DESCRIPTION
EUM6804 is a fan motor driver for brushless DC fan
motor. It integrates three types speed control modes,
low duty startup function, soft switched output, lock
protection, Hall bias, FG output, shutdown mode,
quick restart and TSD. With these modes and functions,
EUM6804 can not only be applied to DC fans which
require different speed curves, but also be applied to
NB and other portable equipments which require
silence and low power dissipation.
The three types speed control modes are PWM control
mode, VCC control mode with slope adjustable,
normal VCC control mode. Low duty startup function
makes it possible for DC fan to start and restart under a
very low PWM duty cycle. Soft switched output drives
DC fan in low noise and low vibration. If a DC fan is
stalled by the external force or obstacles, overdrive
current may incur coil overheat and burning. To
prevent motor from overheating, the lock protection
circuit shuts down the internal power devices for a few
seconds after the motor lock is detected. Then the auto
restart circuit resumes to power up the internal power
devices. EUM6804 has built in Hall IC bias output,
motor rotation speed feedback (FG). With its shutdown
mode and quick restart, EUM6804 consume little
power dissipation during shutdown time and can be
started at once regardless of lock detection time.
FEATURES
Single-Phase Full-Wave Driver System
Three Speed Control Mode
PWM Control Mode
VCC Control Mode with Slope Adjustable
Normal VCC Control Mode
Low Duty Startup
SD = H: Enable Low Duty Startup
SD = L: Disable Low Duty Startup
Soft Switched Drive for Silent Application
Lock Detection and Automatic Restart
Shutdown Mode and Quick Restart
Low Standby Current (PWM = L)
FG Output
Hall Bias Output
Thermal Shutdown Protection
Available in UDFN-10 Package
RoHS Compliant and 100% Lead (Pb)-Free
Halogen-Free
APPLICATIONS
NB Cooling Fan
Silent Fan Motor
Application Circuit
DS6804 Ver1.0 Dec. 2011
Figure 1. PWM Control Mode
1
1 page  
EUM6804Tel: 0755-8398 3377 / 135 9011 2223 http://www.gofotech.com
Absolute Maximum Ratings (1)
VCC -------------------------------------------------------------------------------------- -0.3V to 7V
OUT1, OUT2 --------------------------------------------------------------------------- -0.3V to 7V
IN+, IN-, HB, SV, PWM, SD --------------------------------------------------------- -0.3V to 7V
Iomax --------------------------------------------------------------------------------------- 1000mA
VFG -------------------------------------------------------------------------------------- -0.3V to 7V
IFG, IHB ------------------------------------------------------------------------------------- 10mA
Maximum Junction Temperature ---------------------------------------------------------- +150°C
Lead Temperature (Soldering, 10sec.) ---------------------------------------------------- +300°C
Package Thermal Resistance θJA (UDFN-10) ------------------------------------ 114.81°C/W (2)
Power Dissipation PD @ TA=+25°C (UDFN-10) -----------------------------------1089 mW (2)
Storage Temperature --------------------------------------------------------------- -55°C to +150°C
ESD Ratings
Human Body Mode ---------------------------------------------------------------------------- 2K
Thermal Shut Down---------------------------------------------------------------------------- 160°C
Thermal Shut Down Hysteresis--------------------------------------------------------------- 30°C
Recommended Operating Conditions (3)
Supply Voltage VCC ----------------------------------------------------------------------- 1.8V to 6V
Hall Input Voltage Range IN+, IN- ---------------------------------------------- 0.3V to Vcc-1.1V
Operating Temperature Range ------------------------------------------------------ -30°C to +90°C
Note (1): Stress beyond those listed under “Absolute Maximum Ratings” may damage the device.
Note (2): PCB: 1 layer, dimension 114.3mm*76.2mm.
Note (3): The device is not guaranteed to function outside the recommended operating conditions.
Electrical Characteristics
Specifications in standard type face are for TA=+25°C. VCC＝5.0V unless otherwise specified.
Symbol
Parameter
Conditions
EUM6804
Min.
Typ. Max.
ICC1
Rotation Mode
- 1.1 1.6
ICC2 Supply Current
Lock Protection Mode
- 1.1 1.6
ICC3
Shutdown Mode
- 50 70
Hall Bias
VHB HB Output Voltage
IHB=5mA
1.0 1.2 1.4
Hall Input Signal
VHOFS Input Offset Voltage
VHYS Input Hysteresis Voltage
- - ±6
- ± 10 ± 20
Output
VO Output Voltage
Io=250mA Upper and Lower
Total
-
0.14 0.20
Gio Input-Output Gain
48 49 50
FG Signal Output
VFGL FG Low Voltage
IFG＝5mA
- - 0.1
IFGL FG Leakage Current
VFG＝7V
- -1
Lock Protection
TON Lock Detection On Time
0.4 0.5 0.66
TOFF Lock Detection Off Time
4 5 6.6
PWM Input
VPWMH PWM Input H Level
VPWML PWM Input L Level
0.5× VCC
0
- VCC+0.5
- 0.2× VCC
FPWM PWM Input Frequency
2 - 50
TQ Quick Startup Time
100 130 165
Low Duty Enable Input
VSDH SD Input H Level
VSDL SD Input L Level
0.5× VCC - VCC+0.5
0 - 0.2× VCC
VCC Slope Control Output
ISV SV Output Current
VCC=3V, SV=0V
- 18 -
Unit
mA
µA
V
mV
mV
V
dB
V
µA
Sec
Sec
V
V
kHz
mS
V
V
µA
DS6804 Ver1.0 Dec. 2011
5
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet EUM6804.PDF ] | |
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