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US72 Datasheet(PDF) 1 Page - Melexis Microelectronic Systems |
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US72 Datasheet(HTML) 1 Page - Melexis Microelectronic Systems |
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1 / 9 page  US72/73 Single Coil Fan Driver 3901090261 Page 1 of 9 Data Sheet Rev. 002 May/04 Features and Benefits Full Bridge Driver High Sensitivity Hall Sensor Locked Rotor Shutdown and Auto-Restart Power-Efficient CMOS and Power MOSFETs Integrated tachometer (US72) or alarm (US73) signal outputs Applications For 12V/24V Fans Ordering Information Part No. Temperature Suffix Package Code US72 E (-40°C to 85°C) DC (8-Pin narrow SOIC) US73 E (-40°C to 85°C) DC (8-Pin narrow SOIC) Functional Diagram Locked-Rotor Protection N1 P2 N2 Hall Amp. Gate Drive P1 Gate Drive 6 3 Regulator 4 Switching Logic Clamp 1 Out1 Out2 8 5 2 7 FG/RD Vdd Gnd Description The US72 and US73 provide a monolithic solution for driving single-coil fans. The bridge drivers provide bi-directional current through the single phase motor winding. US72: The tachometer/Frequency Generator (FG) version produces a logic signal, which is aligned with the Hall plate signal. US73: The Rotation Detector (RD) / Alarm Signal version has a low output in the normal condition. When a locked rotor condition occurs the RD changes to a high state. |
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