MLX90297-S
12 V PWM
SINGLE-COIL
FAN DRIVER
BRINGING 12V CAPABILITY TO TINY FAN APPLICATIONS
MLX90297-S
The MLX90297-S is the shrinked version of the MLX90297-A. It offers the same one-chip fan driver
functionality for driving single-coil brushless DC motors, into the Ultra-Thin (0.4mm) DNF8 package, with a
footprint of only 5mm
2
. The motor speed can be controlled in a highly efficient way through PWM switching
of the output half-bridge drivers. The speed control is done through a PWM input signal. The speed transfer
curve can be configured by tuning external resistors.
KEY FEATURES
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All-in-one single coil fan driver with low BOM cost
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High magnetic sensitivity
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Wide operating voltage range from 3.0 V to 18 V
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Wide PWM input frequency range from
100 Hz to 100 KHz
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Built-in PWM input resistor: Reduces BOM and
wire-break protection
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Integrated protection: Locked rotor, brown-out,
thermal shutdown, FG/RD output short circuit
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High ESD protection: 9,000 V human body model
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Package options: UTDFN8 2.5x2.0, 0.4mm height
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Soft start: Suppresses start peak current while
ensuring reliable fan start-up
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Minimum speed setting
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Resistor configurable speed curve with minimum
speed setting and adjustable slope
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Soft switching: Optimum low noise performance at
any rotation speed
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Integrated current limiting of the output driver:
Reduces BOM (no shunt required), safe operation
with low motor coil resistance
V1/21-12-17
The above information is “as is” and believed to be correct and accurate. Melexis disclaims any and all liability in connection with or arising out of the furnishing, application or use of the information or products; any and all liability, including without limitation, special, consequential or incidental damages;
and any and all warranties, express, statutory, implied, or by description, including warranties of fitness for particular purpose, non-infringement and merchantability. Melexis reserves the right to change it at any time and without notice. Users should obtain the latest version of the information to verify
it is current. Users must further determine the suitability of a product for its application, including the level of reliability required and determine whether it is fit for a particular purpose. Export control regulations may apply and export might require a prior authorization from competent authorities.
Melexis’ products are intended for use in normal commercial applications. Unless otherwise agreed upon in writing, the products are not designed, authorized or warranted to be suitable in applications requiring extended temperature range and/or unusual environmental requirements. High reliability
applications, such as medical life-support or life-sustaining equipment are specifically not recommended by Melexis. Melexis’ products are sold under the Melexis’ Terms of Sale, which can be found at https://www.melexis.com/en/legal/terms-and-conditions.
FOR MORE INFORMATION: WWW.MELEXIS.COM/MLX90297-S
The hummingbird’s beating wings flap at extremely high
frequencies, typically around 50 times per second. This allows it
to fly at speeds exceeding 15 m/s, to fly backwards or to seemingly
be suspended in the air in perfect balance. What better animal to
reflect the motor/control driver and actuator capacities?
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