Data Sheet Two Phase Dual-coil High Voltage Smart Fan Motor Driver General Description Features The AH9280 is a most advanced smart fan controller and Hall IC driver manufactured by special CMOS process. It is designed for 5V and 12V cooling fan. To allow survival in a harsh environment and lower the total system cost, the AH9280 has been designed with many powerful functions while almost eliminating all discrete components, such as, capacitor, resistor, transistor, diode and PC board. • • • • • • • • The AH9280 can operate normally in an ambient temperature up to 125°C due to its Hall IC circuitry and power MOSFET output that allow low power dissipation. AH9280 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 ESD Rating: 6000V (Human Body Model) 400V (Machine Model) Applications • • • • When there is no motion for one second, the IC will automatically detect the locked rotor conditions, and enter protection mode, shutting off the motor driver for five seconds. Then, the IC will turn on the motor driver for one second to detect whether there is rotation condition, if fails, the IC will shut off motor driver for five seconds again. This sequence will be repeated until rotation condition is detected, and the IC enters normal operation. This feature can effectively prevent the AH9280 from overheating and damage due to long-time locked rotor condition. 5V/12V DC Brushless Motor/Fan PC, Server, Laptop Cooling Fan Power Supply Cooling Fan Large/Small Sized Fan Specially designed for driving large fans, the AH9280 is optimized for low start-up voltage. The AH9280 is available in TO-94 package. TO-94 Figure 1. Package Type of AH9280 Oct. 2011 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 1 Data Sheet Two Phase Dual-coil High Voltage Smart Fan Motor Driver AH9280 Pin Configuration Z4 Package (TO-94) 4 3 2 1 Figure 2. Pin Configuration of AH9280 (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. 2 BCD Semiconductor Manufacturing Limited 2 Data Sheet Two Phase Dual-coil High Voltage Smart Fan Motor Driver AH9280 Functional Block Diagram Figure 3. Functional Block Diagram of AH9280 Ordering Information AH9280 - G1: Green Circuit Type Package Z4: TO-94 Package Temperature Range TO-94 -40 to 125°C Part Number AH9280Z4-G1 Marking ID 9280Z4-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. 2 BCD Semiconductor Manufacturing Limited 3 Data Sheet Two Phase Dual-coil High Voltage Smart Fan Motor Driver AH9280 Absolute Maximum Ratings (Note 1, TA=25°C) Parameter Symbol Value Unit VCC 18 V Peak Output Current IOUT_P 1200 mA Continuous Output Current IOUT_C 600 mA Supply Current (Fault) ICC 6 mA Power Dissipation PD 600 mW Thermal Resistance (Junction to Ambient) θJA 208 °C/W Storage Temperature TSTG -55 to 150 °C ESD (Human Body Model) ESD 6000 V ESD (Machine Model) ESD 400 V Supply Voltage 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 Ambient Temperature TA -40 125 °C Oct. 2011 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 4 Data Sheet Two Phase Dual-coil High Voltage Smart Fan Motor Driver AH9280 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 Min Typ Max Unit 2.5 12 16 V 4 6 mA 500 mA 0.1 10 µA 600 1000 mV ILEAKAGE Saturation Voltage VSAT Output On Time TON 0.8 s Output Off Time TOFF 5 s VZ 35 V Output Zener Break-down Voltage IOUT=350mA Magnetic Characteristics VCC =12V, TA =25°C, unless otherwise specified. Parameter Symbol Operating Point BOP Releasing Point BRP Hysteresis BHYS Min -50 Typ Max Unit 20 50 Gauss -20 Gauss 40 Gauss VDO (V) High Off-state BHYS Turn On Turn Off VSAT N Low On-state BRP 0 BOP S Magnetic Flux Density (Gauss) Oct. 2011 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 5 Data Sheet Two Phase Dual-coil High Voltage Smart Fan Motor Driver AH9280 Test Circuit S Marking Side N Figure 4. Basic Test Circuit of AH9280 VCC VDO (V) VDOB (V) 12 12 10 10 8 8 6 6 4 4 2 2 VSAT VSAT 0 -40 -20 0 0 20 40 -40 Magnetic Flux Density B (Gauss) -20 0 20 40 Magnetic Flux Density B(Gauss) Figure 5. VDO vs. Magnetic Flux Density Oct. 2011 VCC Figure 6. VDOB vs. Magnetic Flux Density Rev. 1. 2 BCD Semiconductor Manufacturing Limited 6 Data Sheet Two Phase Dual-coil High Voltage Smart Fan Motor Driver AH9280 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 1.0 o TA=25 C 1.5 1.0 2 4 6 8 10 12 14 16 VCC=12V 0.5 0.0 -40 18 -20 0 40 60 80 100 120 o Figure 7. Supply Current vs. Supply Voltage Figure 8. Supply Current vs. Ambient Temperature 1000 100 o TA=25 C 900 VCC=12V BOP 75 IOUT=150mA BRP 50 Saturation Voltage (mV) BOP/BRP/BHYS (Gauss) 20 Ambient Temperature ( C) Supply Voltage (V) BHYS 25 0 -25 800 IOUT=350mA 700 600 500 400 300 -50 -75 200 4 6 8 10 12 14 16 100 -40 18 -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 Figure 10. Saturation Voltage vs. Ambient Temperature Rev. 1. 2 BCD Semiconductor Manufacturing Limited 7 Data Sheet Two Phase Dual-coil High Voltage Smart Fan Motor Driver AH9280 1200 600 1000 500 Power Dissipation (mV) Saturation Voltage (mV) Typical Performance Characteristics (Continued) 800 600 400 400 300 200 o TA=25 C 200 100 VCC=12V 0 0 100 200 300 400 500 0 600 -25 Output Current (mA) 0 25 50 75 100 125 150 o Ambient Temperature ( C) Figure 11. Saturation Voltage vs. Output Current Figure 12. Power Dissipation vs. Ambient Temperature 50 40 BOP/BRP/BHYS (Gauss) 30 20 10 0 -10 VCC=12V BOP BRP BHYS -20 -30 -40 -50 -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. 2 BCD Semiconductor Manufacturing Limited 8 Data Sheet Two Phase Dual-coil High Voltage Smart Fan Motor Driver AH9280 Typical Application VCC=5V or 12V D1 Coil 1 Coil 2 AH9280 VCC DO DOB GND R1 47 C1 2.2 F R2 4.7 R3 4.7 C2 2.2 F C3 2.2 F Figure 14 Typical Application 1 of AH9280 (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 removed according to system requirement. Oct. 2011 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 9 Data Sheet Two Phase Dual-coil High Voltage Smart Fan Motor Driver AH9280 Typical Application (Continued) VCC=5V or 12V D1 Coil 1 Coil 2 AH9280 VCC DO DOB GND R1 47 C1 2.2 F ZD1 35V ZD2 35V Figure 15. Typical Application 2 of AH9280 (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. Oct. 2011 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 10 Data Sheet Two Phase Dual-coil High Voltage Smart Fan Motor Driver AH9280 Mechanical Dimensions TO-94 0.500(0.020) 0.700(0.028) 3.780(0.149) Unit: mm(inch) 45 °TYP 4.080(0.161) 1.520(0.060) 1.720(0.068) 0.700(0.028) 0.900(0.035) 4.980(0.196) 5.280(0.208) 0.360(0.014) 0.510(0.020) 2.000(0.079) 2.300(0.091) 1.100(0.043) 1.400(0.055) Package Sensor Location 0.380(0.015) 0.550(0.022) 3.450(0.136) 3.750(0.148) (For Hall IC) 0.360(0.014) 0.500(0.020) 14.000(0.551) 15.300(0.602) 1.270(0.050) TYP 3.710(0.146) 3.910(0.154) Oct. 2011 Rev. 1. 2 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. 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