Data Sheet 2-PHASE HALF-WAVE HIGH VOLTAGE MOTOR PRE-DRIVER General Description Features The AM4406 is a 2-phase, half-wave motor predriver fabricated for fan motors. This IC is equipped with lock shutdown, automatic restart and rotation detection (RD) function. The lock shutdown function turns off the output current when the motor is under lock condition. And when the motor is unlocked, the IC will automatically restart and allow DC fan to run. In addition, the RD function is to detect the motor status. · · · · · · AM4406 Hall Inputs with a Hysteresis Lock Shutdown and Automatic Restart Rotation Detection (RD) Output Supply Voltage: 4 to 28V Output Current: 70mA Max. Operating Temperature: -30 to 85oC Applications The AM4406 is available in SOIC-8 package. · · · · High Voltage, High Current Brushless DC Fan Power Supply and Switchboards Communications Facilities Industrial Equipment SOIC-8 Figure 1. Package Type of AM4406 Apr. 2007 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 1 Data Sheet 2-PHASE HALF-WAVE HIGH VOLTAGE MOTOR PRE-DRIVER AM4406 Pin Configuration M Package (SOIC-8) VCC 1 8 OUT1 HS (+) 2 7 OUT2 RD 3 6 CT HS (-) 4 5 GND Figure 2. Pin Configuration of AM4406 (Top View) Pin Description Pin Number Pin Name Function 1 VCC Power supply 2 HS (+) Hall input (+) 3 RD 4 HS (-) Hall input (-) 5 GND Ground 6 CT 7 OUT2 Driver output 2 8 OUT1 Driver output 1 Rotation detection Timing capacitor Apr. 2007 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 2 Data Sheet 2-PHASE HALF-WAVE HIGH VOLTAGE MOTOR PRE-DRIVER AM4406 Functional Block Diagram VCC 1 Reg HS (+) RD 8 Pre-driver 1 Pre-driver 2 2 7 6 Hall Amp Control Logic OUT2 CT 3 Automatic Restart Lock Detector Comparator 5 HS (-) OUT1 4 GND Comparator Figure 3. Functional Block Diagram of AM4406 Apr. 2007 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 3 Data Sheet 2-PHASE HALF-WAVE HIGH VOLTAGE MOTOR PRE-DRIVER AM4406 Ordering Information AM4406 - Circuit Type E1: Lead Free Package TR: Tape and Reel Blank: Tube M: SOIC-8 Package Temperature Range SOIC-8 -30 to 85oC Part Number Marking ID Packing Type AM4406M-E1 AM4406M Tube AM4406MTR-E1 AM4406M Tape & Reel BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant. Apr. 2007 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 4 Data Sheet 2-PHASE HALF-WAVE HIGH VOLTAGE MOTOR PRE-DRIVER AM4406 Absolute Maximum Ratings (Note 1) Parameter Symbol Value Unit Supply Voltage VCC 30 V Output Current IOUT 70 mA PD 550 (Note 2) mW Storage Temperature Range TSTG -55 to 125 ESD (Human Body Model) ESD 3000 V ESD (Machine Model) ESD 300 V Power Dissipation o C 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: Reduced by 5.5mW/oC when TA is over 25oC. Recommended Operating Conditions Parameter Symbol Min Max Unit VCC 4 28 V Hall Input Voltage (+) (Note 3) VHS (+) 1.0 VCC-0.5 V Hall Input Voltage (-) (Note 3) VHS (-) 1.0 VCC-0.5 V TA -30 85 Supply Voltage Operating Temperature o C Note 3: Hall input voltage range includes the amplitude of signal. Apr. 2007 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 5 Data Sheet 2-PHASE HALF-WAVE HIGH VOLTAGE MOTOR PRE-DRIVER AM4406 Electrical Characteristics (VCC=12V, TA=25oC, unless otherwise specified.) Parameter Supply Current Symbol ICC Conditions Min No load Typ Max Unit 3.2 5.0 mA Hall Amplifier Input Hysteresis (+) VHYS (+) Zero to peak including offset and hysteresis 3 15 mV Hall Amplifier Input Hysteresis (-) VHYS (-) Zero to peak including offset and hysteresis -3 -15 mV CT Charge Current ICHG VCT=1.5V 2 3.45 5.25 µA CT Discharge Current IDHG VCT=1.5V 0.35 0.8 1.45 µA CT Charge and Discharge Ratio RCD ICHG/ IDHG 3 4.5 8 CT Clamp Voltage VCL 2.2 2.6 3 V CT Comparator Voltage VCP 0.4 0.6 0.8 V OUT1 High Level Voltage VOH1 IOUT1=10mA 10 10.5 V OUT2 High Level Voltage VOH2 IOUT2=10mA 10 10.5 V RD Output Low Level Voltage VRDL IRD=5mA IRD VRD=2V RD Current Capacity Apr. 2007 Rev. 1. 2 0.2 8 18 0.5 V mA BCD Semiconductor Manufacturing Limited 6 Data Sheet 2-PHASE HALF-WAVE HIGH VOLTAGE MOTOR PRE-DRIVER AM4406 Typical Performance Characteristics 12.0 6.0 VCC=12V No Load 5.5 5.0 Output Voltage (V) Supply Current (mA) 11.6 4.5 4.0 11.2 10.8 3.5 10.4 3.0 2.5 0 10.0 5 10 15 20 25 30 0 20 40 60 80 100 Output Current (mA) Supply Voltage (V) Figure 4. Supply Current vs. Supply Voltage Figure 5. Output Voltage vs. Output Current 50 2.5 VCC=12V VCC=12V 40 RD Low Voltage (V) RD Current (mA) 2.0 30 20 1.5 1.0 0.5 10 0.0 0 0 4 8 0 12 4 8 12 16 20 RD Current (mA) RD Supply Voltage (V) Figure 6. RD Current vs. RD Supply Voltage Figure 7. RD Low Voltage vs. RD Current Apr. 2007 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 7 Data Sheet 2-PHASE HALF-WAVE HIGH VOLTAGE MOTOR PRE-DRIVER AM4406 Typical Performance Characteristics (Continued) 800 Power Dissipation (W) 700 Package: SOIC-8 600 500 400 300 200 100 0 0 20 40 60 80 85 100 120 O Ambient Temperature ( C) Figure 8. Power Dissipation vs. Ambient Temperature Apr. 2007 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 8 Data Sheet 2-PHASE HALF-WAVE HIGH VOLTAGE MOTOR PRE-DRIVER AM4406 Operating Diagram Hall Input ON OFF Motor Output CT Motor Lock Cleared Motor Locked Motor Lock Detected TON TOFF Reverts to normal operation High RD Note 4: Automatic restart is performed in the following manner. A motor lock condition is detected when the hall signal stops switching. The output is ON when CT pin is being charged. C2 is the external capacitor of the CT pin. Output ON time and OFF time are determined by the capacitance of C2. Note 5: RD pin is ON during normal operation, and OFF when the motor is locked. It is an open collector output pin. TON = C2 * ( VCL − VCP ) (Sec.) ICHG TOFF = C2 * ( VCL − VCP ) (Sec.) IDHG Note 6: The RD pin may maintain HIGH level for a few hundred milliseconds when the power is turn on. Power RD A few hundred milliseconds Figure 9. Control Timing Diagram of AM4406 Apr. 2007 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 9 Data Sheet 2-PHASE HALF-WAVE HIGH VOLTAGE MOTOR PRE-DRIVER AM4406 Typical Application D2 D1 VCC + C1 L1 VCC OUT1 R1 Hall Element Q1 R4 HS (+) L2 Z11 Z1N Z21 OUT2 R2 AM4406 R5 Z2N R6 HS (-) CT VRD (Note 7) Q2 RD RD Output GND C2 Note 7: VRD should be equal or smaller than VCC. Figure 10. Typical Application of AM4406 Apr. 2007 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 10 Data Sheet 2-PHASE HALF-WAVE HIGH VOLTAGE MOTOR PRE-DRIVER AM4406 Mechanical Dimensions SOIC-8 4.700(0.185) 5.100(0.201) 7° Unit: mm(inch) 0.320(0.013) 1.350(0.053) 1.750(0.069) 8° 8° 7° 0.675(0.027) 0.725(0.029) D 5.800(0.228) 1.270(0.050) 6.200(0.244) TYP D 20:1 φ 0.800(0.031) 0.300(0.012) R0.150(0.006) 0.100(0.004) 0.200(0.008) 0° 8° 1.000(0.039) 3.800(0.150) 4.000(0.157) 0.330(0.013) 0.190(0.007) 0.250(0.010) 1° 5° 0.510(0.020) 0.900(0.035) R0.150(0.006) 0.450(0.017) 0.800(0.031) Apr. 2007 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 11 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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