800 mA single coil fan driver for 5V/12V/24V auto & truck applications

MLX90411-automotive

The MLX90411 is a low-noise all-in-one single-coil fan driver IC with a 0.8 A drive capability, suitable for any fan, blower or pump applications
MLX90411-K: IT/Appliances/Industrial
MLX90411-L: Automotive

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Top features

  • All-in-one fan driver, including high-sensitivity Hall-effect sensor

  • Up to 800 mA motor current

  • Integrated supply clamp: 20V and 40V versions

  • Adaptive commutuation for best in class efficiency for any fan/blower design, over it's full speed operating range

  • Commutation options

    • Maximum torque

    • Very low acoustic noise

    • Low electromagnetic emissions

  • PWM control input

    • Open-loop control with max duty cycle limitation setting

    • Closed loop speed control +/- 1.5%

  • Operating supply range from 3.2 V to 32 V

  • Operating junction temperature from -40 to 150°C

  • Protections and diagnostics

    • Locked Rotor Protection (LRP) (Programmable)

    • Temperature Shutdown (TSD)

    • Over Voltage protection (OVP) (Programmable)

    • Short circuit protection (OCP)

    • Current limit (CL)

    • FG/RD open drain diagnostics output (Programmable)

  • Certifications MLX90411-L (automotive)

    • AECQ-100

    • ASIL-Ready

  • I2C programming

    • Fast prototyping

    • End-of-line programming     

  • Package

    • Straight-lead SOT package (ZE)

    • Tiny UTDFN 2.5 x 2.0 x 0.4 mm (LD)

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800 mA single coil fan driver for 5V/12V/24V auto & truck applications - MLX90411-automotive

Product description

The MLX90411 is a low-noise all-in-one single-coil fan driver IC with a 0.8 A drive capability, designed for meeting the demanding automotive quality requirements through design for test, package qualification and extensive test coverage.

MLX90411 Automotive visual

The MLX90411-L (automotive) is AECQ100 certified. The operating temperature range is from -40 °C to 150 °C. A 20V clamp version is ideal for operating fan applications on a regulated 5V supply.

A 40V clamp version is robust to 40V load dump, and is ideal for operating up to 7W fans directly on the 12V car battery without any additional protection. This version can also be applied on a 24V truck battery with the necessary additional protections against load dump. Typical applications range from LED headlamp fans, seat fans over sensor fans as well as multimedia GPU fans.

The MLX90411-K (consumer) can be found here

The MLX90411 features several adaptive commutation control options optimised for either lowest acoustic noise and vibration, or highest efficiency, or lowest EMI. Extensive start-up options ensure robust and reliable start up over the extended fan lifetime.

Both open loop and closed loop speed control are possible, with a wide range of dynamic (PI) settings.

The device is programmable via an I2C interface and all options are configurable in the on-board EEPROM. Based upon 0.18 μm technology, the tiny MLX90411 is available in a straight-lead SOT package (-ZE package code) and a 2.5 x 2.0 x 0.4 mm UTDFN (LD package code) package.

Features and benefits

  • All-in-one fan driver, including high-sensitivity Hall-effect sensor

  • Up to 800 mA motor current

  • Integrated supply clamp: 20V and 40V versions

  • Adaptive commutuation for best in class efficiency for any fan/blower design, over it's full speed operating range

  • Commutation options

    • Maximum torque

    • Very low acoustic noise

    • Low electromagnetic emissions

  • PWM control input

    • Open-loop control with max duty cycle limitation setting

    • Closed loop speed control +/- 1.5%

  • Operating supply range from 3.2 V to 32 V

  • Operating junction temperature from -40 to 150°C

  • Protections and diagnostics

    • Locked Rotor Protection (LRP) (Programmable)

    • Temperature Shutdown (TSD)

    • Over Voltage protection (OVP) (Programmable)

    • Short circuit protection (OCP)

    • Current limit (CL)

    • FG/RD open drain diagnostics output (Programmable)

  • Certifications MLX90411-L (automotive)

    • AECQ-100

    • ASIL-Ready

  • I2C programming

    • Fast prototyping

    • End-of-line programming     

  • Package

    • Straight-lead SOT package (ZE)

    • Tiny UTDFN 2.5 x 2.0 x 0.4 mm (LD)

Practical applications

application thermal management PHEV thumbnail

PHEV thermal management

In order to optimize energy while increasing the All-Electric Range (AER), a perfect thermal management system is key. Melexis products enable higher system integration towards a safer and cost-effective thermal management, maximizing the AER and improving the driver experience.

 

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Application diagram onboard charger

Onboard charger

The function of the onboard charger is to efficiently, reliably and safely convert AC electricity from the electrical grid (e.g. household plug) to DC electricity so it can be stored in the battery of the electrified vehicle (xEV).

 

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application Main DCDC thumbnail

main DCDC

The DC/DC converter produces low voltage DC electricity (e.g. 12 V, 14 V, 24 V) from the high voltage battery (e.g. 48 V up to 800 V) to supply the boardnet and charge the low voltage battery.

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