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US90AEDC Datasheet(PDF) 1 Page - Melexis Microelectronic Systems |
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US90AEDC Datasheet(HTML) 1 Page - Melexis Microelectronic Systems |
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1 / 12 page  US90A / US91A 24V Hall IC Fan Driver 390109026302 Page 1 of 12 Data Sheet Rev 002 Apr/07 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 tachometer (US90A) or alarm (US91A) signal output 2-coil fan driver with FG/RD output in 4-pin VK / VA and 8-pin narrow SOIC packages (all RoHS Compliant) Application Examples 12V/24V fans Peak current up to 500mA Ordering Information Part No. Temperature Code Package Code US90A E (-40°C to 85°C) VK (4-pin TO-92) US90A E (-40°C to 85°C) DC (8-pin narrow SOIC) US90A E (-40°C to 85°C) VA (4-pin TO-92 flat) US91A E (-40°C to 85°C) VK (4-pin TO-92) US91A E (-40°C to 85°C) DC (8-pin narrow SOIC) US91A E (-40°C to 85°C) VA (4-pin TO-92 flat) 1 Functional Diagram 2 General Description The US90A/91A 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. Frequency Generator or Rotation Detection is available. The open-drain output makes the connectivity with any external interface such as hardware monitoring or Super I/O IC easier. These features are combined with the Melexis patented no-VDD design to fit the IC in small 4-pin VK and VA package. The device is also delivered in DC package for automatic assembly. |
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Similar Description - US90AEDC |
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