Data Sheet TWO PHASE DUAL-COIL CMOS SMART FAN MOTOR DRIVER General Description Features The AH9279 is a most advanced fan control and drive Hall IC manufactured by special CMOS process. This IC consists of voltage reference, Hall sensor, signal amplifier, wave shaping circuit, locked rotor detector, locked rotor protection and restart circuit, output drive circuit, etc.. To allow survival in a harsh environment and in consideration of low cost, the AH9279 has been designed with many functions internally, and requires less external components. • • • • • • • When there is no motion for one second, the IC will detect locked rotor conditions, enter protection mode automatically and disable two outputs for five seconds. Then, it will turn on drive current from one channel for one second. If it still fails to detect fan rotation, the AH9279 will shut off the outputs for five seconds again. This sequence will be repeated until rotation condition is detected and the IC enters normal operation mode. This function prevents the chip from overheating and damage due to long time locked rotor. AH9279 On Chip Hall Sensor Built-in Zener Diodes Protection for Output Driver Power Efficient CMOS and Power MOSFET Drivers Allow 400mA Without Overheating 5V and 12V Operation High Sensitivity for Switching Symmetry Locked Rotor Shutdown and Auto Restart ESD Rating: 4000V(Human Body Model) 400V(Machine Model) Applications • Dual-coil Brushless DC Fan The power dissipation decides allowable maximum ambient temperature. Low power dissipation of AH9279 and the output MOSFET power transistor enable it to be used at ambient temperature up to 125°C on condition that the drive power is lower than 100mW or drive current is less than 200mA. The AH9279 is available in TO-94 package. TO-94 Figure 1. Package Type of AH9279 Oct. 2011 Rev. 1. 3 BCD Semiconductor Manufacturing Limited 1 Data Sheet TWO PHASE DUAL-COIL CMOS SMART FAN MOTOR DRIVER AH9279 Pin Configuration Z4 Package (TO-94) 4 GND 3 DOB 2 DO 1 VCC Figure 2. Pin Configuration of AH9279 (Front View) Pin Description Pin Number Pin Name 1 VCC 2 DO Output pin 1 3 DOB Output pin 2 4 GND Ground pin Oct. 2011 Function Power supply pin Rev. 1. 3 BCD Semiconductor Manufacturing Limited 2 Data Sheet TWO PHASE DUAL-COIL CMOS SMART FAN MOTOR DRIVER AH9279 Functional Block Diagram Figure 3. Functional Block Diagram of AH9279 Ordering Information AH9279 - G1: Green Circuit Type Package Z4: TO-94 Package Temperature Range TO-94 -20 to 125°C Part Number AH9279Z4-G1 Marking ID 9279Z4-G1 Packing Type Bulk BCD Semiconductor's Pb-free products, as designated with "G1" suffix in the part number, are RoHS compliant and green. Oct. 2011 Rev. 1. 3 BCD Semiconductor Manufacturing Limited 3 Data Sheet TWO PHASE DUAL-COIL CMOS SMART FAN MOTOR DRIVER AH9279 Absolute Maximum Ratings (TA=25°C, Note 1) Parameter Symbol Value Unit Supply Voltage VCC 18 V Supply current (Fault) ICC 5 mA Output current IOUT 500 mA Power dissipation PD 550 mW Thermal Resistance (Junction to Ambient) θJA 227 °C/W Storage Temperature TSTG -55 to 150 °C ESD (Human Body Model) ESD 4000 V ESD (Machine Model) ESD 400 V Note 1: Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “Recommended Operating Conditions” is not implied. Exposure to “Absolute Maximum Ratings” for extended periods may affect device reliability. Recommended Operating Conditions Parameter Symbol Min Max Unit Supply Voltage VCC 3.5 16 V Ambient Temperature TA -20 125 °C Oct. 2011 Rev. 1. 3 BCD Semiconductor Manufacturing Limited 4 Data Sheet TWO PHASE DUAL-COIL CMOS SMART FAN MOTOR DRIVER AH9279 Electrical Characteristics VCC =12V, TA =25°C, unless otherwise specified. Parameter Symbol Conditions Supply Voltage VCC Operating Supply Current ICC Average Output Current IOUT Output Leakage Current ILEAKAGE VSAT Saturation Voltage Min Typ 3.5 3.5 Max Unit 16 V 5 mA 500 mA VOUT=24V 0.1 10 µA IOUT =350mA 600 1000 mV Output ON Time tON 0.8 S Output OFF Time tOFF 5 S VZ 35 V θJC 49 °C/W Output Zener Voltage Thermal Resistance (Junction to Case) Break-down Magnetic Characteristics VCC =12V, TA =25°C, unless otherwise specified. Parameter Symbol Operating Point BOP Releasing Point BRP Hysteresis BHYS Oct. 2011 Min -50 Rev. 1. 3 Typ Max Unit 25 50 Gauss -25 Gauss 50 Gauss BCD Semiconductor Manufacturing Limited 5 Data Sheet TWO PHASE DUAL-COIL CMOS SMART FAN MOTOR DRIVER AH9279 Test Circuit S Marking Side N Figure 4. Basic Test Circuit of AH9279 DO( V) VCC DOB(V) 12 12 10 10 8 8 6 6 4 4 2 2 VSAT 0 -40 -20 0 20 V SAT 0 40 -40 Magnetic Flux Density B(GS) -20 0 20 40 Magnetic Flux Density B(GS) Figure 5. VDO vs. Magnetic Flux Density Oct. 2011 V CC Figure 6. VDOB vs. Magnetic Flux Density Rev. 1. 3 BCD Semiconductor Manufacturing Limited 6 Data Sheet TWO PHASE DUAL-COIL CMOS SMART FAN MOTOR DRIVER AH9279 Typical Performance Characteristics 6.0 5.0 5.5 5.0 4.0 Supply Current (mA) Supply Current (mA) 4.5 3.5 3.0 2.5 4.0 3.5 3.0 2.5 2.0 1.5 2.0 o TA=25 C 1.0 O TA=25 C 1.5 1.0 4.5 VCC=12V 0.5 0.0 4 6 8 10 12 14 16 -20 18 0 20 40 60 80 100 120 o Ambient Temperature ( C) Supply Voltage (V) Figure 7. Supply Current vs. Supply Voltage Figure 8. Supply Current vs. Ambient Temperature 100 900 Saturation Voltage (mV) BOP/BRP/BHYS (Gauss) 800 50 0 BOP 600 500 400 VCC=12V O TA=25 C BRP -50 700 300 IOUT=350mA BHYS 200 4 6 8 10 12 14 16 18 -20 20 40 60 80 100 120 O Figure 9. BOP/BRP/BHYS vs. Supply Voltage Oct. 2011 0 Ambient Temperature ( C) Supply Voltage (V) Figure 10. Saturation Voltage vs. Ambient Temperature Rev. 1. 3 BCD Semiconductor Manufacturing Limited 7 Data Sheet TWO PHASE DUAL-COIL CMOS SMART FAN MOTOR DRIVER AH9279 Typical Performance Characteristics (Continued) 1200 600 Power Dissipation (mW) Saturation Voltage (mV) 1000 800 600 400 O TA=25 C VCC=12V 200 200 300 400 300 200 100 0 -25 0 100 500 400 500 0 25 50 75 100 125 150 O Output Current (mA) Ambient Temperature ( C) Figure 11. Saturation Voltage vs. Output Current Figure 12. Power Dissipation vs. Ambient Temperature 40 BOP/BRP/BHYS (Gauss) 30 20 10 0 BOP -10 BRP -20 BHYS -30 -40 -20 0 20 40 60 80 100 120 O Ambient Temperature ( C) Figure 13. BOP/BRP/BHYS vs Ambient Temperature Oct. 2011 Rev. 1. 3 BCD Semiconductor Manufacturing Limited 8 Data Sheet TWO PHASE DUAL-COIL CMOS SMART FAN MOTOR DRIVER AH9279 Typical Application VCC=5V or 12V D1 Coil 1 Coil 2 AH9279 VCC DO DOB GND C3 2.2 F R1 4.7 R2 4.7 C1 2.2 F C2 2.2 F Figure 14. Typical Application 1 of AH9279 (Note 2) Note 2: 1. D1 is an ordinary diode used to filter the noise from VCC and protect IC if VCC and GND are plugged reversed. 2. C1=C2=C3=2.2µF typical, electrolytic capacitors are better. They should be fine tuned based on system design. 3. R1=R2=4.7Ω typical. They can be cancelled according to system requirement. Oct. 2011 Rev. 1. 3 BCD Semiconductor Manufacturing Limited 9 Data Sheet TWO PHASE DUAL-COIL CMOS SMART FAN MOTOR DRIVER AH9279 Typical Application (Continued) VCC=5V or 12V D1 Coil 1 Coil 2 AH9279 VCC DO DOB GND C1 2.2 F ZD1 35V ZD2 35V Figure 15. Typical Application 2 of AH9279 (Note 3) Note 3: 1. D1 is an ordinary diode used to filter the noise from VCC and protect IC if VCC and GND are plugged reversed. 2. C1=2.2µF typical, electrolytic capacitors are better. They should be fine tuned based on system design. 3. ZD1 and ZD2 breakdown voltage are 35V. Oct. 2011 Rev. 1. 3 BCD Semiconductor Manufacturing Limited 10 Data Sheet TWO PHASE DUAL-COIL CMOS SMART FAN MOTOR DRIVER AH9279 Mechanical Dimensions TO-94 Oct. 2011 Rev. 1. 3 Unit: mm(inch) BCD Semiconductor Manufacturing Limited 11 BCD Semiconductor Manufacturing Limited http://www.bcdsemi.com IMPORTANT NOTICE IMPORTANT NOTICE BCD Semiconductor BCD Semiconductor Manufacturing Manufacturing Limited Limited reserves reserves the the right right to to make make changes changes without without further further notice notice to to any any products products or or specifispecifications herein. cations herein. BCD BCD Semiconductor Semiconductor Manufacturing Manufacturing Limited Limited does does not not assume assume any any responsibility responsibility for for use use of of any any its its products products for for any any particular purpose, particular purpose, nor nor does does BCD BCD Semiconductor Semiconductor Manufacturing Manufacturing Limited Limited assume assume any any liability liability arising arising out out of of the the application application or or use use of any of any its its products products or or circuits. circuits. BCD BCD Semiconductor Semiconductor Manufacturing Manufacturing Limited Limited does does not not convey convey any any license license under under its its patent patent rights rights or or other rights other rights nor nor the the rights rights of of others. others. MAIN SITE SITE MAIN - Headquarters BCD Semiconductor Manufacturing Limited BCD Semiconductor Manufacturing Limited - Wafer Fab No. 1600, Zi Xing Road, Shanghai ZiZhu Science-basedLimited Industrial Park, 200241, China Shanghai SIM-BCD Semiconductor Manufacturing Tel: Fax: +86-21-24162277 800,+86-21-24162266, Yi Shan Road, Shanghai 200233, China Tel: +86-21-6485 1491, Fax: +86-21-5450 0008 REGIONAL SALES OFFICE Shenzhen OfficeSALES OFFICE REGIONAL - Wafer FabSemiconductor Manufacturing Limited BCD Shanghai SIM-BCD Semiconductor Manufacturing Co., Ltd. - IC Design Group 800 Yi Shan Road, Shanghai 200233, China Corporation Advanced Analog Circuits (Shanghai) Tel: +86-21-6485 1491,YiFax: 0008200233, China 8F, Zone B, 900, Shan+86-21-5450 Road, Shanghai Tel: +86-21-6495 9539, Fax: +86-21-6485 9673 Taiwan Office Shanghai Semiconductor Manufacturing Co., Ltd., Shenzhen Office BCD Taiwan Semiconductor Shenzhen SIM-BCD Office Office (Taiwan) Company Limited Unit A Room 1203, Skyworth Bldg., Gaoxin Ave.1.S., Nanshan Shenzhen, 4F, 298-1, Guang Road,(Taiwan) Nei-Hu District, Taipei, Shanghai SIM-BCD Semiconductor Manufacturing Co., Ltd.District, Shenzhen Office BCDRui Semiconductor Company Limited China Taiwan Advanced Analog Circuits (Shanghai) Corporation Shenzhen Office 4F, 298-1, Rui Guang Road, Nei-Hu District, Taipei, Tel: +86-755-8826 Tel: +886-2-2656 2808 Room E, 5F, Noble 7951 Center, No.1006, 3rd Fuzhong Road, Futian District, Shenzhen 518026, China Taiwan Fax: +86-755-88267951 7865 Fax: +886-2-2656 28062808 Tel: +86-755-8826 Tel: +886-2-2656 Fax: +86-755-8826 7865 Fax: +886-2-2656 2806 USA Office BCD Office Semiconductor Corp. USA 30920Semiconductor Huntwood Ave.Corporation Hayward, BCD CA 94544, USA Ave. Hayward, 30920 Huntwood Tel :94544, +1-510-324-2988 CA U.S.A Fax:: +1-510-324-2988 +1-510-324-2788 Tel Fax: +1-510-324-2788