AH5798 SINGLE PHASE HALL EFFECT LATCH SMART FAN MOTOR CONTROLLER Description Pin Assignments The AH5798 is a single chip solution for driving single-coil ( Top View ) brushless direct current (BLDC) fans and motors. The integrated full-bridge driver output stage uses soft switching Vdd 1 5 FG to minimize audible switching noise and electromagnetic interference (EMI) providing a low noise solution. Vss 2 NC To help protect the motor coil, the AH5798 provides Rotor Lock Protection which shuts down output drive if rotor lock is O1 3 74 O2 detected. The device automatically re-starts when the rotor lock is removed. Over temperature shutdown provides SOT89-5L thermal protection for the device. A Tachometer output is provided by open-drain Frequency ( Top View) Generator (FG) Pin which allows external interface to monitor motor rotation or speed. The FG output is the magnetic change frequency. FG 1 5 Vdd The AH5798 is available in space saving SOT89-5L and Vss 2 thinner TSOT25 packages. O2 3 4 O1 Features TSOT25 • Supports single-coil full-wave DC fan drivers • Built-in Hall sensor and input amplifier • Operating Voltage: 1.8V to 5.5V Applications • Soft switching for low noise DC fan motor applications • Rotor Lock Protection (Lock detection, output shutdown • 3.3V / 5V Min. BLDC Cooling Fans and automatic re-start) • Netbook/ Notebook BLDC fans • Thermal protection • Low Voltage/ Low Power BLDC Motors • Tachometer (FG) output • No external timing capacitor - Reduces the numbers of external components required • Low profile packages: SOT89-5L and TSOT25 • “Green” Molding Compound AH5798 1 of 11 June 2010 Document number: DS32001 Rev. 2 - 2 www.diodes.com © Diodes Incorporated

AH5798 SINGLE PHASE HALL EFFECT LATCH SMART FAN MOTOR CONTROLLER Typical Application Circuit SYSTEM POWER 10Kohm SYSTEM POWER Vdd FG FG D1 C1 Dz AH5798 O1 O2 V SS * Reverse connection of power supply may damage the device. To prevent reverse power damage, a protection (reverse blocking) Diode D1 is needed between power supply and Vdd terminal. If a reverse power protection diode D1 is used, there is no current return path to power supply, so it is necessary to follow measures such as below. - Connect Dz (Zener diode) between Vdd and Vss terminal, to prevent voltage exceeding the absolute maximum rating of the device. - Connect a capacitor C1 between Vdd and Vss terminal, to complete the current return path to power supply. The AH5798 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. Pin Descriptions Pin Name Description Vdd Power Supply Pin Vss Ground Pin O1 Output Driving & Sinking Pin 1 O2 Output Driving & Sinking Pin 2 NC No Connection FG Frequency Generator (Note 1) Notes: 1. The FG is the same as the magnetic change frequency. AH5798 2 of 11 June 2010 Document number: DS32001 Rev. 2 - 2 www.diodes.com © Diodes Incorporated

AH5798 SINGLE PHASE HALL EFFECT LATCH SMART FAN MOTOR CONTROLLER Functional Block Diagram Vdd Power FG Frequency Generator O1 Hall Control Soft Switching Full Bridge AMP Sensor Logic Control Driver O2 Lock detect, Shoutdown and Vss Automatic re-start Operating S Magentic N O2 O1 Ton Toff FG Normal spinning Mechanical lock “Re-start spinning” motor locked detected motor locked cleared Notes: 2. In “Normal spinning”, the FG changes its state at each rising edge of O1. 3. When the motor locks with South pole at the Hall element, O2 is kept on “L” and O1 is a clock with Ton/Toff ratio. When motor locks with North pole at the Hall element, O1 is kept on “L”, O2 is a clock with Ton/Toff ratio. 4. When “Re-start spinning” occurs, the motor speed ramps up to the “Normal Spinning” speed from zero. Speed ramp-up profile depends on motor characteristics. AH5798 3 of 11 June 2010 Document number: DS32001 Rev. 2 - 2 www.diodes.com © Diodes Incorporated

AH5798 SINGLE PHASE HALL EFFECT LATCH SMART FAN MOTOR CONTROLLER Soft Switching AH5798 employs soft switching of output drive at commutation to reduce audible noise and EMI for low noise applications. Vdd Vout 1 Vout 2 GND 100µs typ. Absolute Maximum Ratings (T = 25°C, unless otherwise noted) A Symbol Parameter Rating Unit Vdd Supply voltage 6 V I Maximum Output Current (Peak) 800 mA O(PEAK) SOT89-5L 800 mW P Power Dissipation D TSOT25 520 mW T Storage Temperature Range -65 ~ 150 oC ST Thermal Resistance Junction-to-Ambient SOT89-5L 156 oC/W θ JA (Note 5) TSOT25 240 oC/W TA TJ Tc θ JA θ JC Notes: 5. θ should be confirmed with heat sink thermal resistance. If there is no heat sink contact, θ will almost be the same as θ . JA JA JC Recommended Operating Conditions (TA = 25°C) Symbol Parameter Conditions Min Max Unit Vdd Supply Voltage Operating 1.8 5.5 °C T Operating Ambient Temperature Range Operating -40 105 V A AH5798 4 of 11 June 2010 Document number: DS32001 Rev. 2 - 2 www.diodes.com © Diodes Incorporated

AH5798 SINGLE PHASE HALL EFFECT LATCH SMART FAN MOTOR CONTROLLER Electrical Characteristics (T = 25°C, Vdd= 5V) A Symbol Parameter Test Conditions Min Typ. Max Unit Idd Supply Current No Load - 5 - mA V Output Voltage High I = 300mA 4.4 4.65 - V OH OUT V Output Voltage Low I = 300mA - 0.35 0.6 V OL OUT T Output Switching Slope Duration 50Ω load on out1/out2 - 100 - μs SW I FG Output Leakage Current - - 5 μA LEAK V FG Output Voltage Low I = 5mA - - 0.4 V FGOL FG T On Time 350 500 650 ms ON R Duty Ratio T / T - 10 - DR OFF ON Magnetic Characteristics (T = 25°C, Vdd = 1.8V~5V, Note 6) A (1mT = 10 G) Symbol Parameter Min Typ. Max Unit B Operate Point 10 25 50 G op Brp Release Point -50 -25 -10 G B Hysteresis - 50 - G hy Notes: 6. The magnetic characteristics may vary with supply voltage, operating temperature and after soldering. AH5798 5 of 11 June 2010 Document number: DS32001 Rev. 2 - 2 www.diodes.com © Diodes Incorporated

AH5798 SINGLE PHASE HALL EFFECT LATCH SMART FAN MOTOR CONTROLLER Operating Characteristics O1 O2 VOH VOH s s olt RP OFF olt OFF OP V V n n e i e i g g a a olt olt V V ut ut p p Out ON OP Out RP ON V V OL OL Brp 0 Bop Brp 0 Bop Magnetic Flux Density in Gauss Magnetic Flux Density in Gauss S N Marking side Marking side N S (SOT89-5L) (TSOT25) AH5798 6 of 11 June 2010 Document number: DS32001 Rev. 2 - 2 www.diodes.com © Diodes Incorporated

AH5798 SINGLE PHASE HALL EFFECT LATCH SMART FAN MOTOR CONTROLLER Performance Characteristics (1) SOT89-5L T (°C) 25 50 60 70 75 80 85 90 95 100 A P (mW) 800 640 576 512 480 448 416 384 352 320 D T (°C) 105 110 115 120 125 130 135 140 145 150 A P (mW) 288 256 224 192 160 128 96 64 32 0 D P (mW) D Power Dissipation Curve 900 800 700 600 500 400 300 200 100 0 -400 25 50 75 100 105 125 150 T (°C) A (2) TSOT25 T (°C) 25 50 60 70 75 80 85 90 95 100 A P (mW) 520 417 375 333 313 292 271 250 230 208 D T (°C) 105 110 115 120 125 130 135 140 145 150 A P (mW) 188 167 146 125 104 83 63 42 21 0 D P (mW) D Power Dissipation Curve 600 520 500 400 300 200 100 0 -400 25 50 75 100 125 150 105 T (°C) A AH5798 7 of 11 June 2010 Document number: DS32001 Rev. 2 - 2 www.diodes.com © Diodes Incorporated

AH5798 SINGLE PHASE HALL EFFECT LATCH SMART FAN MOTOR CONTROLLER Ordering Information AH 5798 - XX G - X Package Green Packing Y : SOT89-5L G : Green 7/13 : Tape & Reel WT : TSOT25 Package Packaging 7”/13” Tape and Reel Device Code (Note 7 & 8) Quantity Part Number Suffix AH5798-YG-13 Y SOT89-5L 2500/Tape & Reel -13 AH5798-WTG-7 WT TSOT25 3000/Tape & Reel -7 Notes: 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) SOT89-5L (Top View) 5 4 7 XX : Identification code Y : Year : 0~9 W : Week : A~Z : 1~26 week; XX Y W X a~z : 27~52 week; z represents 52 and 53 week X : Internal code 1 2 3 A~Z : Green Part Number Package Identification Code AH5798-YG SOT89-5L K4 (2) TSOT25 (Top View) 5 74 XX : Identification code Y : Year 0~9 XX Y W X W : Week : A~Z : 1~26 week; a~z : 27~52 week; z represents 52 and 53 week 1 2 3 X : A~Z : Green Part Number Package Identification Code AH5798-WTG TSOT25 K4 AH5798 8 of 11 June 2010 Document number: DS32001 Rev. 2 - 2 www.diodes.com © Diodes Incorporated

AH5798 SINGLE PHASE HALL EFFECT LATCH SMART FAN MOTOR CONTROLLER Package Outline Dimensions (All Dimensions in mm) (1) Package type: SOT89-5L Sensor Location AH5798 9 of 11 June 2010 Document number: DS32001 Rev. 2 - 2 www.diodes.com © Diodes Incorporated

AH5798 SINGLE PHASE HALL EFFECT LATCH SMART FAN MOTOR CONTROLLER Package Outline Dimensions (Continued) (2) Package type: TSOT25 Sensor Location AH5798 10 of 11 June 2010 Document number: DS32001 Rev. 2 - 2 www.diodes.com © Diodes Incorporated

AH5798 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). Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or trademark rights, nor the rights of others. Any Customer or user of this document or products described herein in such applications shall assume all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diodes Incorporated website, harmless against all damages. Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel. Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall indemnify and hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized application. Products described herein may be covered by one or more United States, international or foreign patents pending. Product names and markings noted herein may also be covered by one or more United States, international or foreign trademarks. LIFE SUPPORT Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein: A. Life support devices or systems are devices or systems which: 1. are intended to implant into the body, or 2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the labeling can be reasonably expected to result in significant injury to the user. B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or to affect its safety or effectiveness. Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any use of Diodes Incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related information or support that may be provided by Diodes Incorporated. Further, 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 © 2010, Diodes Incorporated www.diodes.com AH5798 11 of 11 June 2010 Document number: DS32001 Rev. 2 - 2 www.diodes.com © Diodes Incorporated

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