AH288 HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER General Description Features • • • • • • • • • • On chip Hall sensor Rotor-locked shutdown Automatically restart Frequency generator (FG) output Built-in Zener protection for output driver Operating voltage: 3.8V~28V Output current: IO(AVE) = 400mA Lead Free Package: SOT89-5L (Note 1) SOT89-5L: Available in “Green” Molding Compound (No Br, Sb) Lead Free Finish/RoHS Compliant (Note 2) AH288 is a monolithic fan motor controller with Hall sensor’s capability. It contains two complementary open-drain transistors as motor coil drivers, automatic lock current shutdown, and recovery protections. Additional, frequency generator (FG) output is for speed detection relatively. Rotor-lock shutdown detection circuit turns off the output driver when the rotor is blocked to avoid coil overheat. Then, the automatic recovery circuit will restart the motor. These protected actions are repeated and periodic during the blocked period. Until the blocking is removed, the motor recovers and runs normally. Typical Application Circuit D2 Vdd (24V) D1 R pu 5 4 Coil2 288 FG 1 D3 2 Coil1 3 C1 48V GND * Rpu : typical 10 Kohm 48V Note: The optional Capacitor C1 and Diode D3 are for power stabilization. C1 is recommended to be E-Cap., luF/25V; D3 is recommended to be Zener Diode, VZ =27V. Which C1and D3 value need to be fine tuned to optimize design for different coils and power suppliers . 24V DC Brush-less Fan with FG output function AH288 Rev. 12 DS31040 1 of 9 www.diodes.com APRIL 2010 © Diodes Incorporated AH288 HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER Ordering Information AH288 - Y L - 13 Package Lead Free Packing Y : SOT89-5L L : Lead Free (Note 1) G : Green 13 : Tape & Reel Package Code Y Y Device AH288-YL-13 AH288-YG-13 Notes: 13” Tape and Reel Quantity Part Number Suffix 2500/Tape & Reel -13 2500/Tape & Reel -13 Packaging (Note 3) SOT89-5L SOT89-5L 1. AH288-YL-13 will be replaced by AH288-YG-13 2. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at http://www.diodes.com/products/lead_free.html. 3. 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. 4. Reverse taping as shown on Diodes Inc. Surface Mount (SMD) Packaging document AP02007, which can be found on our website http://www.diodes.com/datasheets/ap02007.pdf. Pin Assignments ( Top View ) 5 FG Vdd 1 288 GND 2 DO 3 47 DOB SOT89-5L Pin Descriptions Pin Name Pin No. Vdd GND DO DOB FG 1 2 3 4 5 AH288 Rev. 12 DS31040 Description Input power Ground Output pin Output pin Frequency generation 2 of 9 www.diodes.com APRIL 2010 © Diodes Incorporated AH288 HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER Block Diagram Vdd 2 Lock shutdown and Automatic recovery Regulator DO Hall Plate Control Logic Amp. DOB GND AH288 Rev. 12 DS31040 3 of 9 www.diodes.com 1 FG APRIL 2010 © Diodes Incorporated AH288 HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER Absolute Maximum Ratings Parameter Symbol Vdd (TA = 25°C) Supply Voltage IO(AVE) IO(PEAK) Output Current IO PD TST TJ θJA Power Dissipation Storage Temperature Maximum Junction Temperature Thermal Resistance Junction-to-Case (Note 5) Rating Unit 30 400 700 800 -55 ~ 150 150 156 V mA mA mW °C °C °C/W TA TJ Tc θ JA θ JC Notes: 5. θJA should be confirmed with what heat sink thermal resistance. If no heat sink contacting, θJA is almost the same as θJC.. Recommended Operating Conditions Symbol Vdd TA Notes: Characteristic Supply Voltage (Note 6) Operating Ambient Temperature Conditions Min Max Unit Operating Operating 3.8 -40 28 100 V °C 6. Please watch out the current limit issue when the operation voltage is over 26.4V, because of the different efficiency in the coil. AH288 Rev. 12 DS31040 4 of 9 www.diodes.com APRIL 2010 © Diodes Incorporated AH288 HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER Electrical Characteristics Symbol (TA = 25 °C, Vdd = 24V, unless otherwise specified) Parameter ICC IOFF TLRP-ON TLRP-OFF Supply Current Output Leakage Current Locked Protection On Locked Protection Off VOUT(SAT) Output Saturation Voltage RDS(ON) VOL VZ Truth Table INH L - Conditions Operating VOUT = 24V Output On Resistance FG Output Vds Output Zener-breakdown Voltage IN+ L H - CT L L H Magnetic Characteristics OUT1 H L off IO = 200mA IO = 300mA IO = 200mA IO = 10mA OUT2 L H off FG H L - Min Typ. Max Unit 0.4 2.4 42 2 < 0.1 0.46 2.76 450 680 2.25 0.3 55 4 10 0.6 3.6 700 800 3.5 0.5 65 mA μA Sec Sec mV ohm V V Mode Rotating Rotating Lockup protection activated (TA = 25 °C, Vdd = 24V, unless otherwise specified, Note 7) (1mT=10 Gauss) Symbol Bop Brp Bhy Notes: Characteristics Operate Point Release Point Hysteresis Min Typ. Max Unit 10 -60 - 30 -30 60 60 -10 - Gauss Gauss Gauss 7. Magnetic characteristics are for design information, which will vary with supply voltage, operating temperature and after soldering. AH288 Rev. 12 DS31040 5 of 9 www.diodes.com APRIL 2010 © Diodes Incorporated AH288 HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER Operating Characteristics DO 24 RP Output Voltage in Volts Output Voltage in Volts DOB OFF 20 16 12 8 4 ON OP Vsat Brp 0 24 OFF OP 20 16 12 8 4 RP ON Vsat Bop Brp Magnetic Flux Density in Gauss 0 Bop Magnetic Flux Density in Gauss S Marking side N ( SOT89-5L ) AH288 Rev. 12 DS31040 6 of 9 www.diodes.com APRIL 2010 © Diodes Incorporated AH288 HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER Performance Characteristics (SOT89-5L) TA (°C) 25 50 60 70 75 80 85 90 95 100 PD (mW) 800 640 576 512 480 448 416 384 352 320 TA (°C) 105 110 115 120 125 130 135 140 145 150 PD (mW) 288 256 224 192 160 128 96 64 32 0 P D (mW ) Power Dissipation Curve 900 800 700 600 500 400 300 200 100 0 -4 00 25 50 75 10 0 125 1 50 T A (°C) Marking Information (1) SOT89-5L ( Top View ) 4 7 5 288 Y W X 1 AH288 Rev. 12 DS31040 2 3 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 : Lead Free A~Z : Green 7 of 9 www.diodes.com APRIL 2010 © Diodes Incorporated AH288 HIGH VOLTAGE HALL-EFFECT SMART FAN MOTOR CONTROLLER Package Information (All Dimensions in mm) (1) Package type: SOT89-5L Sensor Location AH288 Rev. 12 DS31040 8 of 9 www.diodes.com APRIL 2010 © Diodes Incorporated AH288 HIGH VOLTAGE HALL-EFFECT 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 AH288 Rev. 12 DS31040 9 of 9 www.diodes.com APRIL 2010 © Diodes Incorporated