Preliminary Datasheet Single Phase Full-wave Low Voltage Fan Motor Driver AM9799 General Description Features The AM9799 is a single-phase DC brushless motor driver IC featuring BiCMOS process. It is suitable for fan motor drivers for low voltage equipment such as the note personal computers. The AM9799 includes lock shutdown, automatic restart, frequency generator (FG), have been incorporated into one chip. When the motor is under lock condition, lock shutdown function turns off the output current. When the lock condition is removed, the IC automatically restarts and allows DC fan to run. In addition, the FG function is to output rotation speed signal. It features MOS-FET driver circuit for better saturation characteristics. Slew late of amplifiers and feedback resistors are optimized to achieve low-noise motor operation. • • • • • • • • • Lock Detection and Rotational Speed Sensing Mechanisms are Built-in Rotor-locked Protection and Automatic Restart When the Motor Lock is Undone Hall Bias Built-in and Hall Inputs Have a Hysteresis Built-in Thermal Shutdown Circuit Built-in Over Current Protection Built-in Short Protection Operating Voltage: VCC=2V to 6V BiCMOS Technology Compact Package: MSOP-8 Applications The AM9799 is available in MSOP-8 package. • CPU Cooler Computers Fan in Notebook Personal MSOP-8 Figure 1. Package Type of AM9799 Jun. 2011 Rev. 1. 1 BCD Semiconductor Manufacturing Limited 1 Preliminary Datasheet Single Phase Full-wave Low Voltage Fan Motor Driver AM9799 Pin Configuration MM Package (MSOP-8) OUT2 1 8 GND H+ 2 7 OUT1 HB 3 6 VCC H- 4 5 FG Figure 2. Pin Configuration of AM9799 (Top View) Pin Description Pin Number Pin Name 1 OUT2 2 H+ Hall input(+) 3 HB Hall bias 4 H- Hall input(-) 5 FG Frequency generator 6 VCC Power supply 7 OUT1 Driver out1 8 GND Ground Jun. 2011 Function Driver out2 Rev. 1. 1 BCD Semiconductor Manufacturing Limited 2 Preliminary Datasheet Single Phase Full-wave Low Voltage Fan Motor Driver AM9799 Functional Block Diagram Figure 3. Functional Block Diagram of AM9799 Ordering Information AM9799 - G1: Green Circuit Type TR: Tape & Reel Blank: Tube Package MM: MSOP-8 Package Temperature Range MSOP-8 -40 to 105°C Part Number Marking ID Packing Type AM9799MM-G1 6799MM-G1 Tube AM9799MMTR-G1 6799MM-G1 Tape & Reel BCD Semiconductor's Pb-free products, as designated with "G1" suffix in the part number, are RoHS compliant and green. Jun. 2011 Rev. 1. 1 BCD Semiconductor Manufacturing Limited 3 Preliminary Datasheet Single Phase Full-wave Low Voltage Fan Motor Driver AM9799 Absolute Maximum Ratings (TA=25°C, Note 1) Parameter Symbol Value Unit Supply Voltage VCC 7 V Output Current IO (max) 1 A FG Output Current IFG 5 mA FG Output Voltage VFG 7 V 260 °C Lead Temperature (Soldering 10s) Power Dissipation PD 585 mW Junction Temperature TJ 150 °C Thermal Resistance (Die to Ambient) θJA 214 °C/W Storage Temperature Range TSTG -55 to 150 °C ESD (Human Body Model) (Note 2) ESD 2000 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. Note 2: Electronic semiconductor products are sensitive to Electro Static Discharge (ESD). Always observe Electro Static Discharge control procedures whenever handling semiconductor products. Recommended Operating Conditions (TA=25°C) Parameter Symbol Min Max Unit Supply Voltage VCC 2 6 V Hall Input Voltage Range VH 0.4 VCC -1.1 V Operating Temperature TOP -40 105 °C Jun. 2011 Rev. 1. 1 BCD Semiconductor Manufacturing Limited 4 Preliminary Datasheet Single Phase Full-wave Low Voltage Fan Motor Driver AM9799 Electrical Characteristics VCC =5V, TA=25°C, unless otherwise specified. Parameter Symbol Supply Current Conditions Min ICC Input Offset Voltage Typ Max Unit 4 6 mA ±4 mV 0.3 0.45 V 48 50 dB 0.3 V VHOFS IO=250mA upper and lower total Output Saturation Voltage VO Input-output Gain GIN FG Low Voltage VFGL Input Hysteresis Voltage VHYS ±6 ±10 ±15 mV Lock Detection ON time TON 0.35 0.5 0.7 sec Lock Detection OFF time TOFF 3.5 5 7 sec Hall Bias Voltage VHB 1.15 1.3 1.45 V 45 IFG=3mA IHB=5mA Typical Performance Characteristics Power Dissipation (mW) 800 600 400 200 0 -25 0 25 50 75 100 125 150 o Ambient Temperature ( C) Figure 4. Power Dissipation vs. Ambient Temperature Jun. 2011 Rev. 1. 1 BCD Semiconductor Manufacturing Limited 5 Preliminary Datasheet Single Phase Full-wave Low Voltage Fan Motor Driver AM9799 Thermal Shut Down (TSD) This IC is built-in TSD. TSD has the temperature hysteresis. Output ON TSD OFF TSD ON Output OFF 150ºc 175ºc TSD ON (Typ. 175°C ) All output transistor OFF. TSD OFF (Typ. 150°C) Reset ordinary motion. (It has the temperature hysteresis of 25°C <TYP>) Figure 5. Thermal Shut Down Lock Detection, Automatic Restart Circuit This IC detects the rotation of the motor by hall signal, and adjusts lock detection ON time (Ton) and lock detection OFF time (Toff) by the internal counter. These time (Ton, Toff) are showed below. H+ OUT1 TON TOFF OUT2 FG Lock Reset Cancel Motion Motor Lock Ordinary Figure 6. The Function of Rotor-locked Protection and Auto Restart Diagram of AM9799 Jun. 2011 Rev. 1. 1 BCD Semiconductor Manufacturing Limited 6 Preliminary Datasheet Single Phase Full-wave Low Voltage Fan Motor Driver AM9799 Typical Application Figure 7. Typical Application of AM9799 Jun. 2011 Rev. 1. 1 BCD Semiconductor Manufacturing Limited 7 Preliminary Datasheet Single Phase Full-wave Low Voltage Fan Motor Driver AM9799 Mechanical Dimensions MSOP-8 Jun. 2011 Rev. 1. 1 Unit: mm(inch) BCD Semiconductor Manufacturing Limited 8 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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