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US91
Two-Coil Fan Driver - High Voltage (Alarm output)
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Dear Customer,
Please note the US91 is not recommended to be used for new designs.
The US91A represents its direct drop-in replacement.
For more information, please click on the US91A link in Related Products section below.
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The US91 is a one-chip solution for driving two-coil brushless DC cooling fans.
Based on the advanced Melexis CMOS process, the IC contains a Hall-effect sensor, dynamic offset correction and low side output drivers.
The Rotation Detection open-drain output makes the connectivity with any external interface easier.
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
- Low cost
- High sensitivity Hall Sensor
- Locked rotor protection and auto-restart
- Power-efficient CMOS and power MOSFETs
- Built-in output protection clamping diode
- Integrated alarm signal output
- 4-pin VK and 8-pin narrow SOIC package (both RoHS Compliant)
Product Applications
Fan driver ICs
Assets
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