MLX90287 & MLX90297
SINGLE-COIL
FAN DRIVERS
12V ROBUST FAN DRIVERS
MLX90287 & MLX90297
The MLX90287 & MLX90297 are the 2nd GEN of all-in-one single-coil fan drivers with highly sensitive hall sensor
using AGC control for optimal low noise/high efficiency commutation control regardless of the magnetic field strength.
The PWM input allows controlling the fan speed in combination with a number of resistor-configurable settings
to adapt the speed curve to application specific requirements. Targeting low noise fan control in VGA card
cooling applications, the GEN II low noise motor control features also have been leveraged in demanding home
appliance, white goods, industrial and automotive cooling systems.
KEY FEATURES
k
Certification
• AECQ-100
k
Low BOM cost
• Minimum discrete components
• Single layer pcb, even half size possible
k
VGA speed curves
QUICK REFERENCE
MLX90297 SCHEMATIC
Quick Reference
Minimum speed
Speed curve
MLX90287
MLX90297
Cdecoupling
Configurable* Configurable*
VDD
VDD
FG/RD
Current
limit
VDD
Fixed
Configurable*
10%/20%/30%
Average Fan current < 450 mA
< 600 mA
7 W
OUT1
OUT2
Soꢀ Start
Soꢀ Switch
Motor Power
Current limiting
Soft start
5 W
No
VREF
Yes
Rvref
Yes
Yes
R1
Rminsp
MINSP
Soft switching
Reverse polarity
Yes
Yes
Vpwm_pu
Built-in
External diode
[3.3V, 18V]
9 kV
Rpwm_pu
Supply voltage range [4.5V, 18V]
ESD—HBM** 7 kV
LRP
OTP
CLP
PWM
GND
* Configurable by external resistor (Rvref, Rminsp, R1).
** Human Body Model according AEC-Q100-002 standard.
FOR MORE INFORMATION: WWW.MELEXIS.COM/MLX90287
WWW.MELEXIS.COM/MLX90297