Data Sheet Two Phase Dual-coil High Voltage Smart Fan Motor Driver with FG/RD General Description Features The AH9281/82 is a one-chip solution for driving two-coil brushless DC motors and fans. • • • • • • • • Based on the advanced CDMOS process, the IC contains a Hall-effect sensor, dynamic offset correction and powerful output drivers with 1200mA peak output current capability. Specially designed for driving large fans, the device is optimized for low start-up voltage. Frequency Generator or Rotation Detection is available. The open drain output makes easier the connectivity with any external interface such as hardware monitoring or Super I/O IC. • AH9281/82 High Sensitivity Integrated Hall Sensor Low Start-up Voltage 5V and 12V Operation Peak Output Current up to 1200mA Power Efficient CMOS and Power MOSFETs Built-in Output Protection Clamping Diode Locked Rotor Shutdown and Auto-restart Integrated Tachometer (AH9281) or Alarm (AH9282) Signal Output ESD Rating: 6000V (Human Body Model) 400V (Machine Model) Applications • • • • The AH9281/82 is available in TO-95 and SOT-89-5 packages. TO-95 5V/12V DC Brushless Motor/Fan PC, Server, Laptop Cooling Fan Power Supply Cooling Fan Large or Small Fans SOT-89-5 Figure 1. Package Types of AH9281/82 Oct. 2011 Rev. 1. 4 BCD Semiconductor Manufacturing Limited 1 Data Sheet Two Phase Dual-coil High Voltage Smart Fan Motor Driver with FG/RD AH9281/82 Pin Configuration Z5 Package (TO-95) R Package (SOT-89-5) GND DOB DO FG/RD VCC 5 4 3 2 1 DOB DO 5 4 1 VCC (Front View) 2 3 GND FG/RD (Top View) Figure 2. Pin Configuration of AH9281/82 Pin Description Pin Number Pin Name Function TO-95 SOT-89-5 1 1 VCC 2 3 FG/RD 3 4 DO Output pin 1 4 5 DOB Output pin 2 5 2 GND Ground pin Oct. 2011 Power supply pin Frequency Generator (Rotation Detection) open drain output Rev. 1. 4 BCD Semiconductor Manufacturing Limited 2 Data Sheet Two Phase Dual-coil High Voltage Smart Fan Motor Driver with FG/RD AH9281/82 Functional Block Diagram A (B) A for TO-95 B for SOT-89-5 Figure 3. Functional Block Diagram of AH9281/82 Oct. 2011 Rev. 1. 4 BCD Semiconductor Manufacturing Limited 3 Data Sheet Two Phase Dual-coil High Voltage Smart Fan Motor Driver with FG/RD AH9281/82 Ordering Information AH928 - Circuit Type G1: Green 1: AH9281 2: AH9282 TR: Tape & Reel Blank: Bulk Package Z5: TO-95 R: SOT-89-5 Package Temperature Range TO-95 Output Signal Part Number Marking ID Packing Type FG AH9281Z5-G1 9281Z5-G1 Bulk RD AH9282Z5-G1 9282Z5-G1 Bulk FG AH9281RTR-G1 G41C Tape & Reel RD AH9282RTR-G1 G41D Tape & Reel -40 to 125°C SOT-89-5 BCD Semiconductor's Pb-free products, as designated with "G1" suffix in the part number, are RoHS compliant and green. Oct. 2011 Rev. 1. 4 BCD Semiconductor Manufacturing Limited 4 Data Sheet Two Phase Dual-coil High Voltage Smart Fan Motor Driver with FG/RD AH9281/82 Absolute Maximum Ratings (Note 1, TA=25ºC) Parameter Supply Voltage Supply Current (Fault) Peak Output Current Continuous Output Current FG/RD Pull-up Voltage Symbol Value Unit VCC ICC 18 6 1200 600 28 V mA mA mA V IOUT_P IOUT_C VFG/VRD Power Dissipation PD Thermal Resistance (Junction to Ambient) θJA Storage Temperature ESD (Human Body Model) ESD (Machine Model) TO-95 600 SOT-89-5 800 TO-95 208 SOT-89-5 156 -55 to 150 6000 400 TSTG ESD ESD mV ºC/W ºC V 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 2.5 16 V Operating Ambient Temperature TA -40 125 ºC Oct. 2011 Rev. 1. 4 BCD Semiconductor Manufacturing Limited 5 Data Sheet Two Phase Dual-coil High Voltage Smart Fan Motor Driver with FG/RD AH9281/82 Electrical Characteristics VCC=12V, TA=25oC, unless otherwise specified. Parameter Supply Voltage Supply Current Output Current Output Leakage Current Saturation Voltage Output ON Time Output OFF Time FG/RD Output Low Voltage FG/RD Output Leakage Current FG/RD Output Current Limit Output Zener Break-down Voltage Symbol VCC ICC IOUT ILEAKAGE VSAT tON tOFF Conditions Min Typ Max Unit 2.5 12 4 16 6 500 10 1000 V mA mA Operating Average 0.1 600 0.8 5 IOUT=350mA µA mV S S VFGL/VRDL IFG=5mA 0.1 0.2 V IFGLK/IRDLK VFG /VRD=12V 0.1 10 µA IFGLIM/ IRDLIM VFG/VRD=12V 30 mA 35 V VZ Magnetic Characteristics VCC=12V, TA=25oC, unless otherwise specified. Parameter Symbol Min Typ Max Unit Operating Point BOP 0 20 50 Gauss Releasing Point BRP -50 -20 0 Gauss Hysteresis BHYS Oct. 2011 40 Rev. 1. 4 Gauss BCD Semiconductor Manufacturing Limited 6 Data Sheet Two Phase Dual-coil High Voltage Smart Fan Motor Driver with FG/RD AH9281/82 Test Circuit S Marking Side N Figure 4. Basic Test Circuit of AH9281/82 VDO( V) VCC VDOB(V) 12 12 10 10 8 8 6 6 4 4 2 2 VSAT VSAT 0 -40 -20 0 20 0 -40 40 -20 0 20 40 Magnetic Flux Density B (GS) Magnetic Flux Density B (GS) Figure 5. VDO vs. Magnetic Flux Density Oct. 2011 VCC Figure 6. VDOB vs. Magnetic Flux Density Rev. 1. 4 BCD Semiconductor Manufacturing Limited 7 Data Sheet Two Phase Dual-coil High Voltage Smart Fan Motor Driver with FG/RD AH9281/82 Typical Performance Characteristics 6.0 6.0 5.5 5.5 5.0 Supply Current (mA) Supply Current (mA) 5.0 4.5 4.0 3.5 3.0 2.5 4.5 4.0 3.5 3.0 2.5 2.0 1.5 2.0 o TA=25 C 1.5 1.0 o TA=25 C 1.0 VCC=12V 0.5 2 4 6 8 10 12 14 16 0.0 -40 18 -20 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 50 100 40 o TA=25 C 30 BOP/BRP/BHYS (Gauss) BOP/BRP/BHYS (Gauss) 75 50 25 0 -25 BOP 8 10 12 14 16 18 BHYS -20 VCC=12V -20 0 20 40 60 80 100 120 o Ambient Temperature ( C) Supply Voltage (V) Figure 9. BOP/BRP/BHYS vs. Supply Voltage Oct. 2011 BRP -10 -50 -40 -75 6 BOP 0 -40 BHYS 4 10 -30 BRP -50 20 Figure 10. BOP/BRP/BHYS vs. Ambient Temperature Rev. 1. 4 BCD Semiconductor Manufacturing Limited 8 Data Sheet Two Phase Dual-coil High Voltage Smart Fan Motor Driver with FG/RD AH9281/82 Typical Performance Characteristics (Continued) 1000 1200 VCC=12V Saturation Voltage (mV) Saturation Voltage (mV) 900 800 700 600 IOUT=150mA 500 IOUT=350mA 400 1000 800 600 400 o TA=25 C 300 200 VCC=12V 200 100 -40 0 -20 0 20 40 60 80 100 0 120 100 200 o Figure 11. Saturation Voltage vs. Ambient Temperature 400 500 600 Figure 12. Saturation Voltage vs. Output Current 600 800 Power Dissipation (mW) Package: TO-95 Power Dissipation (mW) 300 Output Current (mA) Ambient Temperature ( C) 500 400 300 200 Package: SOT-89-5 600 400 200 100 0 0 -25 0 25 50 75 100 125 -25 150 25 50 75 100 125 150 o Ambient Temperature ( C) Figure 13. Power Dissipation vs. Ambient Temperature Oct. 2011 0 Ambient Temperature ( C) o Figure 14. Power Dissipation vs. Ambient Temperature Rev. 1. 4 BCD Semiconductor Manufacturing Limited 9 Data Sheet Two Phase Dual-coil High Voltage Smart Fan Motor Driver with FG/RD AH9281/82 Typical Application VCC=5V or 12V D1 AH9281/2 VCC FG/RD DO DOB GND R1 47 Coil 1 Coil 2 RPU 4.7K FG/RD R2 4.7 C1 2.2 F C2 2.2 F R3 4.7 C3 2.2 F Figure 15. Typical Application 1 of AH9281/82 (TO-95, 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. R1=47Ω typical. 3. C1=C2=C3=2.2µF typical, electrolytic capacitors are better. They should be fine tuned based on system design. 4. R2=R3=4.7Ω typical. They can be cancelled according to system requirement. 5. RPU=4.7kΩ typical. Oct. 2011 Rev. 1. 4 BCD Semiconductor Manufacturing Limited 10 Data Sheet Two Phase Dual-coil High Voltage Smart Fan Motor Driver with FG/RD AH9281/82 Typical Application (Continued) Figure 16. Typical Application 2 of AH9281/82 (TO-95, 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. R1=47Ω typical. 3. C1 =2.2µF typical, electrolytic capacitors are better. They should be fine tuned based on system design. 4. ZD1 and ZD2 breakdown voltage are 35V. 5. RPU=4.7kΩ typical. Oct. 2011 Rev. 1. 4 BCD Semiconductor Manufacturing Limited 11 Data Sheet Two Phase Dual-coil High Voltage Smart Fan Motor Driver with FG/RD AH9281/82 Typical Application (Continued) Figure 17. Typical Application 3 of AH9281/82 (SOT-89-5, Note 4) Note 4: 1. D1 is an ordinary diode used to filter the noise from VCC and protect IC if VCC and GND are plugged reversed. 2. R1=47Ω typical. 3. C1=C2=C3=2.2µF typical, electrolytic capacitors are better. They should be fine tuned based on system design. 4. R2=R3=4.7Ω typical. They can be cancelled according to system requirement. 5. RPU=4.7kΩ typical. Oct. 2011 Rev. 1. 4 BCD Semiconductor Manufacturing Limited 12 Data Sheet Two Phase Dual-coil High Voltage Smart Fan Motor Driver with FG/RD AH9281/82 Typical Application (Continued) ZD1 35V Coil 1 Coil 2 ZD2 35V 5 4 DOB DO AH9281/2 VCC GND FG/RD 1 2 3 GND VCC=5V or 12V R1 47 RPU 4.7k FG/RD D1 C1 2.2 F Figure 18. Typical Application 4 of AH9281/82 (SOT-89-5, Note 5) Note 5: 1. D1 is an ordinary diode used to filter the noise from VCC and protect IC if VCC and GND are plugged reversed. 2. R1=47Ω typical. 3. C1=2.2µF typical, electrolytic capacitors are better. They should be fine tuned based on system design. 4. ZD1 and ZD2 breakdown voltage are 35V. 5. RPU=4.7kΩ typical. . Oct. 2011 Rev. 1. 4 BCD Semiconductor Manufacturing Limited 13 Data Sheet Two Phase Dual-coil High Voltage Smart Fan Motor Driver with FG/RD AH9281/82 Mechanical Dimensions TO-95 Unit: mm(inch) 1.295(0.051) 1.803(0.071) 0.610(0.024) MIN 2.250(0.089) 2.450(0.096) 1.150(0.045) 1.350(0.053) 3.531(0.139) 3.785(0.149) Package Sensor Location (For Hall IC) 1.220(0.048) 1.620(0.064) 0.381(0.015) 0.581(0.023) 14.000(0.551) 16.000(0.630) 0.360(0.014) 0.510(0.020) 0.950(0.037) REF 0.330(0.013) 0.432(0.017) 5.105(0.201) 5.359(0.211) Oct. 2011 Rev. 1. 4 BCD Semiconductor Manufacturing Limited 14 Data Sheet Two Phase Dual-coil High Voltage Smart Fan Motor Driver with FG/RD AH9281/82 Mechanical Dimensions (Continued) SOT-89-5 Oct. 2011 Rev. 1. 4 Unit: mm(inch) BCD Semiconductor Manufacturing Limited 15 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. 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