Preliminary Datasheet ADJUSTABLE-SPEED SINGLE-PHASE FULL-WAVE PRE-DRIVER FOR MOTOR General Description Features The AM4967 is a single-coil, single-phase motor predriver designed by bipolar process. Its rotation speed can be controlled through an external PWM. This IC requires few external components and has the merit of high efficiency which make it suitable for use in great air volume, large current and high voltage applications. · · · · · · · · The AM4967 is available in SSOP-16 package. AM4967 Single-phase Full-wave Pre-drive Rotation Speed Control via External PWM Maximum Operating Current Limit Linear Start Function for Reducing Large Current Impulse at the Moment of Turn-on Minimum Rotation Speed Setting Lock Protection and Auto Start Function Rotation Speed Indication Over Temperature Protection Application · · CPU and OA (Office Automation) Cooler Fan Brushless DC Motor SSOP-16 Figure 1. Package Type of AM4967 Jun. 2008 Rev. 1. 1 BCD Semiconductor Manufacturing Limited 1 Preliminary Datasheet ADJUSTABLE-SPEED SINGLE-PHASE FULL-WAVE PRE-DRIVER FOR MOTOR AM4967 Pin Configuration GS Package (SSOP-16) OUT2 OUT1 16 OUT2B 1 2 15 OUT1B VCC 3 14 GND CS 4 13 VREF VMIN 5 12 LS VPWM 6 11 CT COSC 7 10 HIN+ FG/RD 8 9 HIN- Figure 2. Pin Configuration of AM4967 Jun. 2008 Rev. 1. 1 BCD Semiconductor Manufacturing Limited 2 Preliminary Datasheet ADJUSTABLE-SPEED SINGLE-PHASE FULL-WAVE PRE-DRIVER FOR MOTOR AM4967 Pin Description Pin Number Pin Name Function 1 OUT2 Second channel P-type driver output. Open-drain output, must be connected with pull-up resistor to drive external power devices in operation 2 OUT2B Second channel N-type driver output. Push-pull output to drive external power devices 3 VCC Power supply 4 CS Current limiter indicator. Fixed to 0.2V internally. Maximum allowable current is decided by external sample resistance. When the voltage of this pin exceeds 0.2V, the output will be shut down by current limit. If this function is not used, connect this pin to ground directly 5 VMIN Minimum speed setting terminal. Connect it to VREF when disused. In case it is tied to other power supply for controlling, an isolated resistor is necessary 6 VPWM Speed control terminal. It is full speed mode when connected to ground. If the speed is controlled by PWM mode, the frequency of control signal is 20kHz to 100kHz. Moreover, a low pass network is necessary to transfer PWM to DC level 7 COSC PWM basic oscillation frequency generator when connected with a capacitor of 220pF. 30kHz frequency is available. 8 FG/RD "FG" means pin 8 is an output pin of FG signal which is used for detecting rotation speed. "RD" means pin 8 is an output pin of RD signal, and is used for detecting fan rotate-stop state. "FG" and "RD" can be selected according to the requirement. This pin need to be connected with pull-up resistor when used. A new pulse will be generated once input signal changed. Keep this pin open when it is not to be used 9 HIN- Hall sensor negative input. To prevent noise, this pin is recommended to be placed as close as possible to Hall circuit. If necessary, a capacitor may be added between HIN+ and HIN- to reduce the influence caused by noise 10 HIN+ Hall sensor positive input. To avoid noise, this pin is recommended to be placed as close as possible to Hall circuit 11 CT Lock protection and auto start frequency generator. It is connected with an external 0.47µF capacitor which decides lock-rotate time and start time. If lock-rotate protection function is disused, please connect this pin to GND 12 LS Linear start terminal. This pin is connected to VREF externally via a capacitor of 0.47µF to 1µF which enables fan start steadily. Start time is dependent to the capacitance. If linear start function is not used, connect this pin to ground 13 VREF 5V voltage reference 14 GND Ground for circuit control 15 OUT1B First channel N-type driver output. Push-pull output to drive external power devices 16 OUT1 First channel P-type driver output. Open-drain output, must be connected with pull-up resistor to drive external power devices in operation BCD Semiconductor Manufacturing Limited Jun. 2008 Rev. 1. 1 3 Preliminary Datasheet ADJUSTABLE-SPEED SINGLE-PHASE FULL-WAVE PRE-DRIVER FOR MOTOR AM4967 Functional Block Diagram 8 CT VCC VREF 11 Lock Shutdown and Auto Restart 3 13 5V Reference 15 16 Predriver Controller HIN+ HIN- FG/RD Thermal Shutdown 2 10 1 OUT1B OUT1 OUT2B OUT2 9 Hysteresis Amp Hysteresis Amp Oscillation 12 5 6 LS VMIN VPWM 7 COSC 4 14 CS GND Figure 3. Functional Block Diagram of AM4967 Jun. 2008 Rev. 1. 1 BCD Semiconductor Manufacturing Limited 4 Preliminary Datasheet ADJUSTABLE-SPEED SINGLE-PHASE FULL-WAVE PRE-DRIVER FOR MOTOR AM4967 Truth Table 1. Driver-lock. VOSC is High, VPWM, VVMIN and VLS are low. HIN- HIN+ H L CT OUT1 OUT1B OUT2 OUT2B FG/RD Mode L L OFF H L OUT1 OUT2 (Driver) OFF H L L OFF OUT2 OUT1 (Driver) OFF L OFF H L OFF H OFF L OFF L L H H L L H H Lock Protection 2. Speed control. VCT, VLS are low. VPWM, VMIN COSC L H H L HIN- HIN+ OUT1 OUT1B OUT2 OUT2B Mode H L L L OFF H OUT1 OUT2 (Driver) L H OFF H L L OUT2 OUT1 (Driver) H L OFF L OFF H L H OFF H OFF L Regenerative Ordering Information AM4967 E1: Lead Free G1: Green Circuit Type Pin 8 R: RD Blank: FG TR: Tape and Reel Blank: Tube Package GS: SSOP-16 Package SSOP-16 Temperature Range Part Number Lead Free Marking ID Green Lead Free Green Packing Type AM4967GS-E1 AM4967GS-G1 AM4967GS AM4967GS-G1 Tube AM4967GSTR-E1 AM4967GSTR-G1 AM4967GS AM4967GS-G1 Tape & Reel AM4967RGS-E1 AM4967RGS-G1 AM4967RGS AM4967RGS-G1 -30 to 105oC AM4967RGSTR-E1 AM4967RGSTR-G1 AM4967RGS AM4967RGS-G1 Tube Tape & Reel BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant. Products with "G1" suffix are available in green package. BCD Semiconductor Manufacturing Limited Jun. 2008 Rev. 1. 1 5 Preliminary Datasheet ADJUSTABLE-SPEED SINGLE-PHASE FULL-WAVE PRE-DRIVER FOR MOTOR AM4967 Absolute Maximum Ratings (Note 1) Parameter Symbol Value Unit VCC 18 V OUT1B/OUT2B Output Current IOUTB 20 mA OUT1/OUT2 Sink Current IOUT 20 mA OUT1B/OUT2B/OUT1/OUT2 Withstand Voltage VOUT 18 V VPWM/VVMIN 7 V VLS 7 V VFG/VRD VCC V FG/RD Output Current IFG/IRD 10 mA VREF Output Current IREF 20 mA Power Dissipation (Note 2) PD 800 mW Storage Temperature Range TSTG -55 to 150 oC ESD (Human Body Model) ESD 2000 V Supply Voltage VPWM/VMIN Withstand Voltage LS Withstand Voltage FG/RD Withstand 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. Note 2: When mounted on the specified printed circuit board (114.3mm×76.1mm×1.6mm, glass epoxy). Recommended Operating Conditions Parameter Supply Voltage Symbol Min VCC VPWM/VMIN Input Voltage Hall Input Voltage Ambient Temperature TA Jun. 2008 Rev. 1. 1 Typ Max Unit 5.5 16 V 0 5 V 0.2 3 V -30 105 o C BCD Semiconductor Manufacturing Limited 6 Preliminary Datasheet ADJUSTABLE-SPEED SINGLE-PHASE FULL-WAVE PRE-DRIVER FOR MOTOR AM4967 Electrical Characteristics (VCC=12V, TA=25oC, unless otherwise specified.) Parameter Symbol Conditions Min Typ Max Unit IQ1 Lock off 8 10 12 IQ2 Lock on 8 10 12 4.5 5.0 5.5 V mA Quiescent Current IOUT=5mA VREF Reference Voltage VREF Current Limit Voltage VLIM 186 200 215 mV COSC High Level Voltage VOSCH 3.0 3.4 3.8 V COSC Low Level Voltage VOSCL 0.9 1.1 1.3 V 25.4 30 35.5 kHz COSC Frequency fOSC CT High Level Voltage VCTH 2.4 3.3 3.6 V CT Low Level Voltage VCTL 1.0 1.3 1.6 V CT Charge Current ICHG VCT=0.5V 1.5 2 2.5 µA CT Discharge Current IDHG VCT=3.5V 0.13 0.2 0.25 µA CT Charge and Discharge Ratio RCD ICHG/IDHG 8.5 10 14.5 Linear Start Charge Current ILS VLS=1V 0.5 0.7 µA VCC0.9 VCC V CL=220pF OUT1B/OUT2B High Level Voltage VOBH IOUT=10mA OUT1B/OUT2B Low Level Voltage VOBL IOUT=10mA 0.9 1.5 V OUT1/OUT2 Low Level Voltage VOL IOUT=10mA 0.45 0.8 V FG Signal Hall Input Sensitivity VHN IHIN+, IHIN- difference voltage (include offset and hysteresis) ±10 FG Saturation Voltage VSAT ISINK=5mA 200 FG Leakage Current ILFG VFG=VCC VPWM/VMIN Bias Current IPWMB/IVMINB VCC1.8 VOSC=VPWM/VVMIN=2V 0.1 mV 500 mV 30 µA 3 µA BCD Semiconductor Manufacturing Limited Jun. 2008 Rev. 1. 1 7 Preliminary Datasheet ADJUSTABLE-SPEED SINGLE-PHASE FULL-WAVE PRE-DRIVER FOR MOTOR AM4967 Typical Performance Characteristics 16 16 14 14 Supply Current (mA) Supply Current (mA) 12 12 10 8 10 8 6 4 6 TA=25°C VCC=12V 2 4 2 4 6 8 10 12 14 16 0 -40 18 -30 -20 -10 Supply Voltage (V) 0 10 20 30 40 50 60 70 80 O Ambient Temperature ( C) Figure 5. Supply Current vs. Ambient Temperature Figure 4. Supply Current vs. Supply Voltage 7.5 6.0 7.0 6.5 Reference Voltage (V) Reference Voltage (V) 5.5 5.0 4.5 VCC=12V 4.0 6.0 5.5 5.0 4.5 4.0 VCC=12V 3.5 IOUT=5mA O TA=25 C 3.0 2.5 3.5 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 0 90 2 4 6 8 10 12 14 16 18 20 Output Current (mA) O Ambient Temperature ( C) Figure 6. Reference Voltage vs. Ambient Temperature Figure 7. Reference Voltage vs. Output Current Jun. 2008 Rev. 1. 1 BCD Semiconductor Manufacturing Limited 8 Preliminary Datasheet ADJUSTABLE-SPEED SINGLE-PHASE FULL-WAVE PRE-DRIVER FOR MOTOR AM4967 Typical Performance Characteristics (Continued) 1000 Power Dissipation (mW) 800 600 400 200 0 -20 0 20 40 60 80 100 Ambient Temperature (°C) Figure 8. Power Dissipation vs. Ambient Temperature BCD Semiconductor Manufacturing Limited Jun. 2008 Rev. 1. 1 9 Preliminary Datasheet ADJUSTABLE-SPEED SINGLE-PHASE FULL-WAVE PRE-DRIVER FOR MOTOR AM4967 Operating Diagram VPWM Voltage fOSC=30kHz (COSC=220pF) ON-Duty-Large 3.0V VMIN Voltage COSC Voltage 1.0V ON-Duty-Small 0V Minimum Speed Setup Rotation (Stop Mode) Low Speed PWM Adjustable Speed High Speed Full Speed FG RPM Figure 9. Operating Diagram 1 of AM4967 (Speed Control, Note 3) Note 3: voltage becomes lower, output ON duty becomes large. Sequentially, coil current increases and the motor runs at high speed which is monitored by FG output while rotation-stop state is monitored by RD output. 1. Minimum Speed Setting Mode (Stop Mode) When fan rotate at low speed, its lowest speed is settable by VMIN pin voltage. If not, fan motor stops. 3. Full Speed Rotation Mode 2. Low Speed to High Speed Setting Mode When VPWM voltage drops to 1.0V or lower, motor fan will run at full speed. (If the speed is not controlled, VPWM=GND) PWM control system works by comparing the voltage of VPWM and COSC (1.0V to 3.0V). When VPWM voltage is low, the transistors of the upper and lower side outputs are ON. On contrary, when VPWM voltage is high, the upper side transistors are OFF. And coil current re-circulates in a lower side transistor. Therefore, as the VPWM Jun. 2008 Rev. 1. 1 BCD Semiconductor Manufacturing Limited 10 Preliminary Datasheet ADJUSTABLE-SPEED SINGLE-PHASE FULL-WAVE PRE-DRIVER FOR MOTOR AM4967 Operating Diagram (Continued) LS Voltage 3.0V VMIN Voltage COSC VPWM Voltage 1.0V 0V Lock Protection Linear Start VPWM Setting Speed 100% ON-Duty 0% Figure 10. Operating Diagram 2 of AM4967 (Linear Start, VPWM Voltage<VMIN Voltage, Note 4) LS Voltage VPWM Voltage 3.0V VMIN Voltage COSC 1.0V 0V Lock Protection Linear Start VMIN Setting Speed 100% ON-Duty 0% Figure 11. Operating Diagram 3 of AM4967 (Linear Start, VPWM Voltage>VMIN Voltage, Note 4) Jun. 2008 Rev. 1. 1 BCD Semiconductor Manufacturing Limited 11 Preliminary Datasheet ADJUSTABLE-SPEED SINGLE-PHASE FULL-WAVE PRE-DRIVER FOR MOTOR AM4967 Operating Diagram (Continued) LS Voltage VPWM Voltage 3.0V VMIN Voltage COSC 1.0V 0V Lock Protection Linear Start VMIN Setting Speed RD High Level Low Level 100% ON-Duty 0% Figure 12. Operating Diagram 4 of AM4967 (Note 4) Note 4: The inclination of LS voltage is adjusted between VLS and VREF according to the capacitance which is recommended to be 0.1µF to 1.0µF. Jun. 2008 Rev. 1. 1 BCD Semiconductor Manufacturing Limited 12 Preliminary Datasheet ADJUSTABLE-SPEED SINGLE-PHASE FULL-WAVE PRE-DRIVER FOR MOTOR AM4967 Typical Application Power In 1kΩ More than 1µF/25V OUT1 OUT2 100Ω 3 VCC More than 1µF/25V 13 Hall 9 VREF 10kΩ~ 100kΩ FG/RD 8 AM4967 HIN- 10 12 5 CS OUT1 LS OUT1B VMIN OUT2 OUT2B 6 4 HIN+ VPWM PWM In COSC 7 220pF (f =30kHz) GND 16 15 1 2 14 CT 11 0.47µF Figure 13. Typical Application of AM4967 (VCC=12V) BCD Semiconductor Manufacturing Limited Jun. 2008 Rev. 1. 1 13 Preliminary Datasheet ADJUSTABLE-SPEED SINGLE-PHASE FULL-WAVE PRE-DRIVER FOR MOTOR AM4967 Mechanical Dimensions SSOP-16 Unit: mm(inch) 3.800(0.150) 4.000(0.157) 7 0.200(0.008) o 0.300(0.012) 0.635(0.025) 7 o BSC 4.700(0.185) Φ 0.800(0.031) 5.100(0.201) 0.100(0.004) 1.000(0.039) 0.900(0.035) 0.250(0.010) 1.350(0.053) 1.750(0.069) 0.400(0.016) 1.270(0.050) 5.800(0.228) 6.200(0.244) 8 SEE DETAIL A 1.550(0.061) o 0.250(0.010) 1.350(0.053) 0.150(0.006) 0 R0.150(0.006) 8 o o 0.250(0.010) R0.150(0.006) 8 o 0.650(0.026) 0.750(0.030) 0.200(0.008) 0.250(0.010) 0.020(0.001) 0.050(0.002) DETAIL A Jun. 2008 Rev. 1. 1 BCD Semiconductor Manufacturing Limited 14 BCD Semiconductor Manufacturing Limited http://www.bcdsemi.com IMPORTANT NOTICE BCD Semiconductor Manufacturing Limited reserves the right to make changes without further notice to any products or specifications herein. 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