AH5792 SINGLE PHASE HALL EFFECT LATCH SMART FAN MOTOR CONTROLLER Description Pin Assignments ( Top View ) 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. O2 1 VSS 2 O1 3 5 FG NC 4 Vdd SOT553 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. ( Top View ) 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. O2 1 5 FG Vss 2 NC O1 3 74 Vdd SOT89-5L Features Applications • • • • • • • • • • • 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 AH5792 Document number: DS314641 Rev. 6 - 2 3.3V / 5V Min. DC Fans (Eight Pole) Low Voltage / BLDC Motors Micro-Vibration Motors 1 of 10 www.diodes.com July 2010 © Diodes Incorporated AH5792 SINGLE PHASE HALL EFFECT LATCH SMART FAN MOTOR CONTROLLER Typical Application Circuit (Note 1) SYSTEM POWER 10Kohm SYSTEM POWER Vdd D1 C1 FG FG Dz AH5792 O1 O2 V SS Notes: 1. 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 (10Kohm, typically for System Power = 5V) connected to a supply voltage. Pin Descriptions (Note 2) Pin Name O1 Vdd Vss FG O2 NC Notes: Description Output driving & sinking pin 1 Power supply pin Ground pin Frequency Generator (Note 2) Output driving & sinking Pin 2 No Connection 2. The FG is half (1/2) the magnetic change frequency. AH5792 Document number: DS314641 Rev. 6 - 2 2 of 10 www.diodes.com July 2010 © Diodes Incorporated AH5792 SINGLE PHASE HALL EFFECT LATCH SMART FAN MOTOR CONTROLLER Functional Block Diagram Vdd Power FG Frequency Generator Hall Sensor O1 Logic Block AMP Full Bridge Driver O2 Lock Detector V SS Operating (Note 3, 4, 5) Magentic S N Out 1 Out 2 Ton FG Normal spinning Toff Mechanical lock motor locked detected Notes: “Re-start spinning” motor locked cleared 3. 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. 4. 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. 5. 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: DS314641 Rev. 6 - 2 3 of 10 www.diodes.com July 2010 © Diodes Incorporated AH5792 SINGLE PHASE HALL EFFECT LATCH SMART FAN MOTOR CONTROLLER Absolute Maximum Ratings (TA = 25°C, unless otherwise noted) Symbol Vdd IO(PEAK) Characteristics Values Unit 6 V SOT553 400 mA SOT89-5L 500 mA SOT553 SOT89-5L 230 800 mW mW Supply voltage Maximum Output Current (Peak) PD Power Dissipation TST Storage Temperature Range o -65 ~ 150 C Recommended Operating Conditions (TA = 25°C) Symbol Vdd TA Parameter Supply Voltage Operating Temperature Range Conditions Rating Unit Operating Operating 1.8 to 5.0 -40 to +100 V °C Electrical Characteristics (TA = 25°C, Vdd = 5.0V) Symbol Idd Characteristic Supply Current Conditions No Load IOUT = 200mA (For SOT553) IOUT = 300mA (For SOT89-5L) IOUT = 200mA (For SOT553) IOUT = 300mA (For SOT89-5L) Min Typ. Max Unit - 3.5 5 mA 4.4 - - V - - 0.6 V - 148 - mA - - 5 μA VOH Output Voltage High VOL Output Voltage Low IOUT Output Current ILeak FG Output Leakage Current IFG FG Output Current VFGOL = 0.4V 5 - - mA FG Output Voltage Low IFG = 5mA - - 0.4 V - 215 - ms - 10 - VFGOL TON On Time RDR Duty Ratio AH5792 Document number: DS314641 Rev. 6 - 2 RL=30Ω TOFF / TON 4 of 10 www.diodes.com July 2010 © Diodes Incorporated AH5792 SINGLE PHASE HALL EFFECT LATCH SMART FAN MOTOR CONTROLLER Magnetic Characteristics (TA = 25°C, Vdd = 1.8V~5.0V, Note 6) Symbol Bop Brp Bhy Notes: Parameter Operate Point Release Point Hysteresis Min Typ. (1mT = 10 G) Max Unit 10 -50 - 30 -30 60 50 -10 - G G G 6. The magnetic characteristics may vary with supply voltage, operating temperature and after soldering. Operating Characteristics O2 O1 VOH RP OFF ON OP Output Voltage in Volts Output Voltage in Volts VOH VOL Brp 0 OFF OP RP ON VOL Bop Brp Magnetic Flux Density in Gauss S Marking side Document number: DS314641 Rev. 6 - 2 Bop Magnetic Flux Density in Gauss S AH5792 0 Marking side N N (SOT553) (SOT89-5L) 5 of 10 www.diodes.com July 2010 © Diodes Incorporated AH5792 SINGLE PHASE HALL EFFECT LATCH SMART FAN MOTOR CONTROLLER Performance Characteristics (1) SOT553 TA (°C) 25 50 60 70 80 85 90 100 110 120 130 140 150 PD (mW) 230 184 166 147 129 120 110 92 74 55 37 18 0 P D (m W ) P o w e r D is s ip a tio n C u rv e 300 200 100 0 0-4 0 25 50 75 85 100 125 150 o TA ( C ) (2) SOT89-5L TA (°C) PD (mW) TA (°C) PD (mW) 25 800 105 288 50 640 110 256 60 576 115 224 P D (m W ) 70 512 120 192 75 480 125 160 80 448 130 128 85 416 135 96 90 384 140 64 95 352 145 32 100 320 150 0 Power Dissipation Curve 900 800 700 600 500 400 300 200 100 0 0 -40 25 50 75 10 0 1 25 1 50 T A (°C ) AH5792 Document number: DS314641 Rev. 6 - 2 6 of 10 www.diodes.com July 2010 © Diodes Incorporated AH5792 SINGLE PHASE HALL EFFECT LATCH SMART FAN MOTOR CONTROLLER Ordering Information AH 5792 - X G - X Device AH5792-ZG-7 AH5792-YG-13 Notes: Package Green Packing Z : SOT553 Y : SOT89-5L G : Green 7/13 : Tape & Reel Package Code Z Y 7”/13” Tape and Reel Quantity Part Number Suffix 3000/Tape & Reel -7 2500/Tape & Reel -13 Packaging (Note 7 & 8) SOT553 SOT89-5L 7. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at http://www.diodes.com/datasheets/ap02001.pdf 8. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at http://www.diodes.com/products/lead_free.html Marking Information (1) SOT553 ( Top View ) XX Y W X Part Number AH5792 XX : Identification Code Y : Year : 0~9 W : Week : A~Z : 1~26 week; a~z : 27~52 week; z represents 52 and 53 week X : A~Z : Green Package SOT553 Identification Code KE (2) SOT89-5L 7 ( Top View ) 5 4 XX Y W X 1 2 Part Number AH5792 AH5792 Document number: DS314641 Rev. 6 - 2 3 XX : Identification code Y : Year : 0~9 W : Week : A~Z : 1~26 week; a~z : 27~52 week; z represents 52 and 53 week X : Internal code A~Z : Green Package SOT89-5L 7 of 10 www.diodes.com Identification Code KF July 2010 © Diodes Incorporated AH5792 SINGLE PHASE HALL EFFECT LATCH SMART FAN MOTOR CONTROLLER Package Outline Dimensions (All Dimensions in mm) (1) Package Type: SOT553 1.50/1.70 1.0Typ. CL 0.10/0.18 CL 0.32/0.58 Pin1 0.5Typ. 2.2 1.2 C L 1.7 0.1 0.45/0.67 1.10/1.25 C L 0.30 C 1.55/1.70 6°~8 ° A 5x-0.5 0.30 C D D 0.30 C D 1.0Typ. Hall Sensor 0.15/0.30(5x) 0.10 M C A-B D B 0.55/0.62 6°~8° Pin1 0.5Typ. 0.3 Land Pattern Recommendation (Unit:mm) Top View 6°~ 8° AH5792 Document number: DS314641 Rev. 6 - 2 8 of 10 www.diodes.com July 2010 © Diodes Incorporated AH5792 SINGLE PHASE HALL EFFECT LATCH SMART FAN MOTOR CONTROLLER Package Outline Dimensions (Continued) (2) Package type: SOT89-5L Sensor Location AH5792 Document number: DS314641 Rev. 6 - 2 9 of 10 www.diodes.com July 2010 © Diodes Incorporated AH5792 SINGLE PHASE HALL EFFECT LATCH SMART FAN MOTOR CONTROLLER IMPORTANT NOTICE DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION). 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