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AH5792 Dataheets PDF



Part Number AH5792
Manufacturers Diodes Incorporated
Logo Diodes Incorporated
Description SINGLE PHASE HALL EFFECT LATCH SMART FAN MOTOR CONTROLLER
Datasheet AH5792 DatasheetAH5792 Datasheet (PDF)

NOT RECOMMENDED FOR NEW DESIGN USE AH9485/AH9486 AH5792 SINGLE PHASE HALL EFFECT LATXCHXXSXMXART FAN MOTOR CONTROLLER Description The AH5792 is a single chip solution for driving single-coil brush-less DC fans and motors. The AH5792 employs a bidirectional full bridge driver output stage for single coil fan motor applications. The device includes features such as Rotor Lock Protection with rotor lock detection and automatic self-restart to avoid damage to the coil when the rotor is blocked..

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NOT RECOMMENDED FOR NEW DESIGN USE AH9485/AH9486 AH5792 SINGLE PHASE HALL EFFECT LATXCHXXSXMXART FAN MOTOR CONTROLLER Description The AH5792 is a single chip solution for driving single-coil brush-less DC fans and motors. The AH5792 employs a bidirectional full bridge driver output stage for single coil fan motor applications. The device includes features such as Rotor Lock Protection with rotor lock detection and automatic self-restart to avoid damage to the coil when the rotor is blocked. The AH5792 also offers an externally controlled Tachometer (Frequency Generator Pin) open-drain output which makes it easier to connect with external interface such as hardware monitoring. The FG is half (1/2) the magnetic change frequency. Pin Assignments ( Top View ) O2 1 5 FG VSS 2 NC O1 3 SOT553 4 Vdd The devices are packaged in SOT553 and SOT89-5L small outline packages for applications such as small motors like vibration motors or ultra thin cooling fans. ( Top View ) O2 1 5 FG Vss 2 NC O1 3 74 Vdd SOT89-5L Features • Support Single-Phase Full Wave Min Fan Driver • Built-in Hall Sensor Input Amplifier • Low Voltage Startup (Vdd = 1.8V) • Lock Detection and Automatic Self-Restart • Without External Timing Capacitor, Reduces the Numbers of External Component Required • FG Output • Low Profile Package: SOT553 and SOT89-5L • “Green” Molding Compound • Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) • Halogen and Antimony Free. “Green” Device (Note 3) • For automotive applications requiring specific change control (i.e. parts qualified to AEC-Q100/101/200, PPAP capable, and manufactured in IATF 16949 certified facilities), please contact us or your local Diodes representative. https://www.diodes.com/quality/product-definitions/ Applications • 3.3V / 5V Min. DC Fans (Eight Pole) • Low Voltage / BLDC Motors • Micro-Vibration Motors Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant. 2. See https://www.diodes.com/quality/lead-free/ for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and Lead-free. 3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and <1000ppm antimony compounds. AH5792 Document number: DS31641 Rev. 8 - 3 1 of 10 www.diodes.com January 2021 © Diodes Incorporated Typical Application Circuit (Note 4) SYSTEM POWER Vdd D1 C1 Dz V SS AH5792 AH5792 XXXXX SYSTEM POWER 10Kohm FG FG O1 O2 Note: 4. Reverse connection of power supply may break the device. A countermeasure is needed such as using reverse power protection diode D1 between power supply and Vdd terminal. In such case of using reverse power protection diode D1 because of there is no way to return current to power supply, please take necessary measures like below. - Connect Dz (Zener diode) between Vdd and Vss terminal, not to exceed the absolute maximum rating voltage. - Connect a capacitor C1 between Vdd and Vss terminal, to make the path of return current to power supply. The AH5792 has an open-drain tachometer FG output that follows the half (1/2) the magnetic change frequency. A pull-up resistor (10kΩ, typically for System Power = 5V) connected to a supply voltage. Pin Descriptions (Note 5) Pin Name O1 Output Driving & Sinking Pin 1 Vdd Power Supply Pin Vss Ground Pin FG Frequency Generator (Note 5) O2 Output Driving & Sinking Pin 2 NC No Connection Note: 5. The FG is half (1/2) the magnetic change frequency. Description AH5792 Document number: DS31641 Rev. 8 - 3 2 of 10 www.diodes.com January 2021 © Diodes Incorporated Functional Block Diagram AH5792 XXXXX Vdd Power Hall Sensor AMP V SS FG Frequency Generator O1 Logic Full Bridge Block Driver O2 Lock Detector Operating (Notes 6, 7, 8) S Magentic N Out 1 Out 2 FG Normal spinning Ton Toff Mechanical lock “Re-start spinning” motor locked detected motor locked cleared Notes: 6. In “Normal spinning, the FG shall change its state at each rising edge of OUT2. In “Mechanical lock”, the FG state is kept as the same as the moment of motor locked detected. 7. When magnetic is locked as “S” pole, then out1 is kept on “L”, out2 is a clock with Ton/Toff ratio. When magnetic is locked at “N” pole, then out 2 is kept on “L”, out 1 is a clock with Ton/Toff ratio. 8. When “Re-start spinning” occurs, the motor shall ramp up to the “Normal Spinning” speed from zero. It depends on the motor characteristics. AH5792 Document number: DS31641 Rev. 8 - 3 3 of 10 www.diodes.com January 2021 © Diodes Incorporated Absolute Maximum Ratings (TA = +25C, unless otherwise noted.) Symbol Vdd IO(PEAK) PD TSTG Supply Voltage Characteristics Maximum Output Current (Peak) Power Dissipation Storage Temperature Range SOT553 SOT89-5L SOT553 SOT89-5L .


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