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US890
Two-Coil Fan Driver - High Output Current (Tachometer output)
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The US890 is a one-chip solution for driving two-coil brushless DC motors and fans.
Based on the advanced Melexis CMOS process, the IC contains a Hall-effect sensor, dynamic offset correction and powerful output drivers with 1200mA peak output current capability.
Specially designed for driving large fans, the device is optimized for low start-up voltage.
The Frequency Generator open-drain output makes easier the connectivity with any external interface such as hardware monitoring or Super I/O IC.
These features are combined with the Melexis patented no-VDD design to fit the IC in a small 4-pin VK package.
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Features and Benefits
- Peak output current up to 1200mA
- Low start-up voltage
- Low output resistance
- High sensitivity integrated Hall Sensor
- Power-efficient CMOS and power MOSFETs
- Built-in output protection clamping diode
- Locked rotor protection and auto-restart
- Integrated tachometer signal protected output
- Low cost
- 2-coil fan driver with FG output in
- RoHS Compliant 4-pin VK package
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