AH5794-WU-7 Diodes Inc., AH5794-WU-7 Datasheet

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... Description The AH5794 is a single chip solution for driving single-coil brushless direct current (BLDC) fans and motors. The integrated full-bridge driver output stage uses soft switching to minimize audible switching noise and electromagnetic interference (EMI) providing a low noise solution. Low operating voltage down to 1.8V allows motor speed to be controlled by varying the supply voltage ...

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... Output driving & sinking pin NC No connection FG Frequency generator (Note 1) Notes: 1. The FG output is the same as the magnetic change frequency. AH5794 Document number: DS35809 Rev SINGLE PHASE HALL EFFECT LATCH FAN MOTOR DRIVER Description www.diodes.com AH5794 March 2012 © Diodes Incorporated ...

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... Functional Block Diagram (Note 2) Notes: 2.The AH5794 has an open-drain tachometer FG output that follows the magnetic change frequency. Typically a pull-up resistor of 10kΩ is recommended from FG pin to the supply voltage. AH5794 Document number: DS35809 Rev SINGLE PHASE HALL EFFECT LATCH FAN MOTOR DRIVER www ...

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... I = 300mA OUT I = 500mA OUT I = 300mA OUT I = 500mA OUT I = 300mA OUT I = 500mA OUT 17Ω load on O1/ 5mA OFF www.diodes.com AH5794 Values Unit 7 V 1000 mA 650 mW 750 (Note 4) o -65 ~ +150 Min Max Unit 1.8 6 -40 +105 C Min Typ. Max Unit - 2 ...

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... Document number: DS35809 Rev SINGLE PHASE HALL EFFECT LATCH FAN MOTOR DRIVER = 25° 1.8V to 6V, Note 5) DD Min 10 -50 - OFF OFF Bop Magnetic Flux Density in Gauss www.diodes.com AH5794 (1mT = 10 G) Typ. Max Unit 25 50 -25 -10 Gauss Brp 0 Bop N ...

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... depends on magnetic pole North or South AH5794 Document number: DS35809 Rev SINGLE PHASE HALL EFFECT LATCH FAN MOTOR DRIVER Ton Toff Mechanical lock motor locked detected (Note www.diodes.com AH5794 “Re-start spinning” motor locked cleared March 2012 © Diodes Incorporated ...

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... With 5V nominal motor, changing V voltage between 5V to 1.8V, speed can be controlled from 100% to 36% typically. DD Soft Switching AH5794 uses soft switching of the motor coil current during commutation for to minimize audible switching noise and electromagnetic interference (EMI) to provide a low noise solution. Vdd Vout 1 ...

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... TEMPERATURE (°C) Power Dissipation Curve www.diodes.com AH5794 100 339 313 286 260 135 140 145 150 105 125 150 March 2012 © Diodes Incorporated ...

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... TEMPERATURE (°C) Power Dissipation Curve www.diodes.com AH5794 100 406 375 344 313 135 140 145 150 105 125 150 March 2012 © Diodes Incorporated ...

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... EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. No purposely added lead. Halogen and Antimony free. Please visit our website at http://www.diodes.com/products/lead_free.html Marking Information (1) Package type: TSOT26 Part Number AH5794-WU-7 (2) Package type: U-DFN2020C-6 Part Number AH5794-FDC-7 AH5794 Document number: DS35809 Rev ...

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... SINGLE PHASE HALL EFFECT LATCH FAN MOTOR DRIVER (All Dimensions in mm) Hall Sensor 0.55±0.1 Top Mark (Active area depth) Seating plane 6x-0.37 C 1.95/2.075 0.57/0.63 A 1.55/1.75 0.30±0.1 Die Land Pattern Recommendation 0.65nom. 0.2/0.3 0. Bottom View www.diodes.com AH5794 0.65 1.59 (Unit:mm) Top View March 2012 © Diodes Incorporated ...

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... Taping Orientation (1) Package Type: U-DFN2020C-6 Notes: 11. The taping orientation of the other package type can be found on our website at http://www.diodes.com/datasheets/ap02007.pdf. AH5794 Document number: DS35809 Rev SINGLE PHASE HALL EFFECT LATCH FAN MOTOR DRIVER www.diodes.com AH5794 March 2012 © Diodes Incorporated ...

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... Customers must fully indemnify Diodes Incorporated and its representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems. Copyright © 2012, Diodes Incorporated www.diodes.com AH5794 Document number: DS35809 Rev SINGLE PHASE HALL EFFECT LATCH FAN MOTOR DRIVER IMPORTANT NOTICE LIFE SUPPORT www.diodes.com AH5794 March 2012 © Diodes Incorporated ...