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PDF EUM6801 Data sheet ( Hoja de datos )
| Número de pieza | EUM6801 | |
| Descripción | 3-Phase Sensorless Fan Motor Driver | |
| Fabricantes | Eutech Microelectronics | |
| Logotipo |  |
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EUM6801
3-Phase Sensorless Fan Motor Driver
DESCRIPTION
EUM6801 is a 3-phase sensorless fan motor driver. It
senses the BEMF (Back Electromotive Force) of the
motor in rotation and provides corresponding
commutation current to the motor. The sensorless
technology doesn’t need Hall sensors. The absence of
the Hall sensor makes the fabrication of the motor
easier, especially suitable for ultra-small motors.
EUM6801 integrates PWM speed control, soft
switching, lock protection, auto restart, fan tachometer
and forward/reverse functions.
As applying 3-phase driver method, PWM mode
controls fan speed by adjusting duty cycle of PWM
signal. Internal soft switching function drives fan
motor in low noise and low vibration ways. EUM6801
can drive motor from stop mode to rotation mode by
adjusting the external capacitor between OSC pin and
GND pin. If a motor is stalled by external force or
obstacles, over-driving 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. If the lock still persists,
EUM6801 shuts down power devices for another few
seconds. The lock protection time is built-in and need
no external components. During rotation, FG outputs
signal which represents motor speed. The motor
rotation direction is controlled by setting FR to high or
low.
FEATURES
3-Phase Sensorless Drive Function
(No Hall Sensor Needed)
Few External Components
(3 CAP Only)
Low Startup Voltage: <1.8V
PWM Speed Control and Soft Switching
20µA Low Standby Current
Built in FG Outputs
Built in Thermal Protection
UDFN Small Package with Thermal Pad
(3mm×3mm×0.5mm for Small Fan)
RoHS Compliant and 100% Lead (Pb)-Free
Halogen-Free
APPLICATIONS
NB Fan, Low Noise Fan and Low Power
Consumption Fan
Application Circuit
DS6801 Ver1.2 May 2012
Figure 1.
1
1 page  
EUM6801Tel: 0755-8398 3377 / 135 9011 2223 http://www.gofotech.com
Absolute Maximum Ratings (1)
VCC, FG, U, V, W to GND ------------------------------------------------------------- -0.3V to 7V
Iout -------------------------------------------------------------------------------------------------- 0.9A
IFG ------------------------------------------------------------------------------------------------- 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 ---------------------------------------------------------------- 2kV
Thermal Shut Down------------------------------------------------------------------------------180°C
Recommended Operating Conditions (3)
Supply Voltage VCC -------------------------------------------------------------------- 1.8V to 6.0V
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, and those with boldface type apply over the full operating
temperature range TA=-30°C ~+90°C. VCC＝5.0V unless otherwise specified.
Parameter
Conditions
EUM6801
Unit
Min. Typ. Max.
ICC1 Power supply current 1
ICC2 Power supply current 2
Output
Ron(H) Output upper side saturation
Ron(L) Output lower side saturation
Ron(Total) Ron(H)+ Ron(L)
Startup Oscillation
IOSC1 CPWM charge current
IOSC2 CPWM discharge current
Vpp CPWM peak to peak voltage
PWM Input Signal
VPWMH High-level input voltage
VPWML Low-level input voltage
FPWM Input frequency
IPWM Input current
FG & RD Signal Output
VFG FG pin low voltage
IFGL FG pin leak current
Lock Protection and Auto-Restart
Ton Lock detection on time
Toff Lock detection off time
PWM pin = VCC
PWM pin = 0V
IO=500mA
IO=500mA
IO=500mA
PWM pin=0V
IFG = 5mA
VFG = 7V
- 1.35 2 mA
- 20 30 µA
- 0.5 0.6 Ω
- 0.5 0.75 Ω
- 1 1.35 Ω
2.5 3 3.5 µA
2.4 3 3.5 µA
0.5 V
2.5 VCC V
0 1.0 V
20 25 50 kHz
- -20 -30 µA
- 0.1 0.15 V
0.1 µA
1.4 2 2.3 s
3.1 4 4.5 s
Thermal Shutdown
TSD TSD operating temperature Design Target
180 °C
∆TSD Temperature hysteresis width Design Target
35 °C
DS6801 Ver1.2 May 2012
5
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet EUM6801.PDF ] | |
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