Data Sheet SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER General Description Features The AM4961 is a full wave driver IC with PWM control function. It is used for single phase motor and is capable of speed control by changing output duty cycle. · · · · · · · · The AM4961 is available in SSOP-16 and HTSSOP14 packages. AM4961 Built-in Hall Bias Circuit Built-in PWM Speed Control Circuit Built-in Minimal Speed Setup Circuit Rotation Speed Indication (FG) Rotation or Lock State Indication (RD) Built-in Thermal Shutdown Circuit Lock Protection Output Current Limit Application · · CPU Cooler Fan in PC Brushless DC Motor Driver HTSSOP-14 SSOP-16 Figure 1. Package Types of AM4961 May. 2011 Rev. 2. 4 BCD Semiconductor Manufacturing Limited 1 Data Sheet SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER AM4961 Pin Configuration GS Package (SSOP-16) OUT2 1 16 PGND NC 2 15 OUT1 VCC 3 14 GND VMIN 4 13 CT VPWM 5 12 VREF COSC 6 11 HIN- FG 7 10 HB RD 8 9 HIN+ GH Package (HTSSOP-14) PGND PGND OUT2 1 14 OUT1 VCC 2 13 GND VMIN 3 12 CT VPWM 4 11 VREF COSC 5 10 HIN- FG 6 9 HB RD 7 8 HIN+ Figure 2. Pin Configuration of AM4961 (Top View) May. 2011 Rev. 2. 4 BCD Semiconductor Manufacturing Limited 2 Data Sheet SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER AM4961 Pin Description Pin Number Pin Name Function HTSSOP-14 SSOP-16 1 1 OUT2 Driver output 2 2 NC No connection 2 3 VCC Power supply 3 4 VMIN Minimum duty setting 4 5 VPWM Adjustable Input 5 6 COSC Oscillator capacitor 6 7 FG Rotation speed indicator 7 8 RD Rotation/lock state indicator 8 9 HIN+ 9 10 HB 10 11 HIN- Hall sensor input - 11 12 VREF Reference voltage regulator 12 13 CT 13 14 GND Ground for control circuit 14 15 OUT1 Driver output 1 16 PGND Power ground Hall sensor input + Hall sensor bias regulator Lock and rotation setting capacitor terminal May. 2011 Rev. 2. 4 BCD Semiconductor Manufacturing Limited 3 Data Sheet SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER AM4961 Functional Block Diagram COSC VPWM VMIN 6 (7) 5 (6) Oscillation Circuit FG Thermal Shutdown 4 (5) 7 (8) 3 (4) RD Pre-driver VREF HB HIN+ HIN- 11 (12) 9 (10) Voltage Reference 2 (3) VCC Control Circuit Hall Bias 1 (1) 8 (9) OUT2 10 (11) Hysteresis Amp Lock Shutdown and Auto Restart 12 (13) CT A (B) A for 14-pin 14 (15) OUT1 (16) 13 (14) GND PGND B for 16-pin Figure 3. Functional Block Diagram of AM4961 May. 2011 Rev. 2. 4 BCD Semiconductor Manufacturing Limited 4 Data Sheet SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER AM4961 Truth Table HIN- HIN+ H L L H H L L H H L L COSC (Note 1) H L L H H H L L H CT H L OUT1 OUT2 FG H L L L H OFF OFF L L L OFF OFF H OFF L OFF H OFF OFF OFF L OFF OFF OFF RD Mode Rotation (Drive) L Rotation (Recirculate) OFF Lock Protection Note 1: VOSC (H) >VPWM, VOSC (L) <VPWM. Ordering Information AM4961 E1: Lead Free G1: Green Circuit Type TR: Tape and Reel Blank: Tube Package GS: SSOP-16 GH: HTSSOP-14 Package Temperature Range SSOP-16 -30 to 90oC Part Number Lead Free Marking ID Green Lead Free Green Packing Type AM4961GS-E1 AM4961GS-G1 AM4961GS AM4961GS-G1 Tube AM4961GSTR-E1 AM4961GSTR-G1 AM4961GS AM4961GS-G1 Tape & Reel AM4961GH-E1 AM4961GH-G1 AM4961GH AM4961GH-G1 Tube AM4961GHTR-E1 AM4961GHTR-G1 AM4961GH AM4961GH-G1 Tape & Reel HTSSOP-14 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 packages. May. 2011 Rev. 2. 4 BCD Semiconductor Manufacturing Limited 5 Data Sheet SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER AM4961 Absolute Maximum Ratings (Note 2) Parameter Symbol Value Unit Supply Voltage VCC 18 V Output Current IOUT 1.0 A Output Voltage VOUT 18 V IHB 10 mA VPWM 6 V RD Output Voltage VRD 18 V FG Output Voltage VFG 18 V RD Output Current IRD 10 mA FG Output Current IFG 10 mA Power Dissipation (Note 3) PD Storage Temperature Range TSTG -55 to 150 oC ESD (Human Body Model) ESD 2000 V ESD (Machine Model) ESD 250 V HB Output Current VPWM Input Voltage SSOP-16 0.8 W HTSSOP-14 1.1 W Note 2: 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 3: TA=25oC, no external heatsink. Recommended Operating Conditions Parameter Symbol Min Typ Max Unit Supply Voltage VCC 3.5 12 16 V Hall Input Voltage + (Note 4) VIN+ 0.2 3 V Hall Input Voltage - (Note 4) VIN- 0.2 3 V TA -30 90 Ambient Temperature o C Note 4: Hall input voltage range includes the amplitude of signal. May. 2011 Rev. 2. 4 BCD Semiconductor Manufacturing Limited 6 Data Sheet SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER AM4961 Electrical Characteristics (VCC=12V, TA=25oC, unless otherwise specified.) Parameter Quiescent Current Symbol Conditions Min Typ Max Unit IQ1 Lock Off 10.2 15 18.76 IQ2 Lock On 5.38 8 10.55 5.8 6 6.2 V mA VREF Voltage VREF IREF=5mA Output Saturation Voltage at High Side VSATH ISOURCE=200mA 1.0 1.17 V Output Saturation Voltage at Low Side VSATL ISINK=200mA 0.2 0.3 V 18 25 32 kHz COSC Frequency fOSC COSC=100pF COSC High Level Voltage VOSCH 3.45 3.6 3.75 V COSC Low Level Voltage VOSCL 1.83 1.95 2.07 V Hall Input Hysteresis VHYS ±10 ±20 mV Hall Bias Voltage VHB 1.1 1.25 1.4 V CT High Level Voltage VCTH 3.55 3.7 3.88 V CT Low Level Voltage VCTL 1.55 1.7 1.85 V CT Charge Current ICHG 1.5 2 2.85 μA CT Discharge Current IDHG 0.14 0.2 0.285 μA CT Charge and Discharge Ratio RCD ICHG/IDHG 8.5 10 14.5 FG Output Low Level Voltage VFGL IFG=5mA 0.2 0.3 V FG Leakage Current ILFG VFG=12V 30 μA RD Output Low Level Voltage VRDL IRD=5mA 0.3 V RD Leakage Current ILRD VRD=12V 30 μA IHB=5mA May. 2011 Rev. 2. 4 0.2 BCD Semiconductor Manufacturing Limited 7 Data Sheet SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER AM4961 Typical Performance Characteristics 20 20 TA=25 C Rotation Mode Rotation Mode 16 12 12 IQ1 (mA) IQ1 (mA) 16 O VCC=12V 8 8 4 4 0 -50 0 0 50 100 150 200 4 6 8 10 O 12 14 16 18 VCC (V) TA ( C) Figure 4.Quiescent Current vs. Ambient Temperature Figure 5. Quiescent Current vs. Supply Voltage 2.0 2.0 VCC=12V VCC=12V 1.5 VSATL (V) VSATH (V) 1.5 1.0 0.5 0.5 0.0 1.0 0.0 0 200 400 600 800 1000 0 200 400 600 800 1000 IOUT (mA) IOUT (mA) Figure 6. Output Saturation Voltage (High) vs. Output Current May. 2011 Rev. 2. 4 Figure 7. Output Saturation Voltage (Low) vs. Output Current BCD Semiconductor Manufacturing Limited 8 Data Sheet SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER AM4961 1.2 1.2 1.0 1.0 0.8 0.8 PD (W) PD (W) Typical Performance Characteristics (Continued) 0.6 0.4 0.2 0.6 0.4 Package: SSOP-16 No External Heatsink 0.2 0.0 -20 0 20 40 60 80 90 100 0.0 120 O TA ( C) Package: HTSSOP-14 No External Heatsink -20 0 20 40 60 80 90 100 O TA ( C) Figure 9. Power Dissipation vs. Ambient Temperature Figure 8. Power Dissipation vs. Ambient Temperature May. 2011 Rev. 2. 4 BCD Semiconductor Manufacturing Limited 9 Data Sheet SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER AM4961 Operating Diagram VPWM adjustable Voltage Lowest speed setting voltage fOSC=25kHz (COSC=100pF) Vosc VMIN Voltage COSC Output Vosc Low Speed PWM Variable High Speed VCC 0V FG Output Figure 10. Operating Diagram of AM4961 (Note 5) Note 5: 1. Low Speed Setting Mode M When VPWM voltage is higher than VMIN pin voltage, motor speed is settable by VMIN pin voltage. The minimum drive duty cycle is settable by comparing COSC oscillating voltage and VMIN pin voltage. VPWM voltage is decided by variation of PWM duty. At a certain PWN duty, when VPWM voltage is lower than the low side of COSC output voltage, the motor will run at full speed. 2. Variable Speed Setting Mode When VPWM voltage is lower than VMIN pin voltage, PWM control system works by comparing VPWM voltage and COSC voltage. If VPWM voltage is higher, the ON duty cycle of the upper side transistors will be minimized and motor speed becomes lower. Vice versa. 3. Full Speed Rotation Mode May. 2011 Rev. 2. 4 BCD Semiconductor Manufacturing Limited 10 Data Sheet SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER AM4961 Typical Application D1 VCC R1 27k C1 1μF or greater L1 AM4961 R2 10k 1 (1) 2 (3) 3 (4) R4 39k 4 (5) R6 330k PWM 5 (6) R3 7.5k 6 (7) 7 (8) OUT2 OUT1 VCC GND VMIN CT VPWM 14 (15) 13 (14) 12 (13) VREF 11 (12) HIN- 10 (11) COSC FG HB RD PGND HIN+ 9 (10) 8 (9) Hall C4 0.47μF (16) R7 100k C2 0.33μF R8 R5 C3 100pF 68k 100k Figure 11. Typical Application of AM4961 (Note 6) Note 6: When CCP is 100pF, the COSC frequency will be 25kHz. *1. Ground Line Layout *5. FG Output PGND is connected to motor supply stage and GND is connected to control stage. All ground lines from control stage are connected to GND. FG output terminal is open collector output which varies with phase change. *6. RD Output *2. Stability of Power Supply RD output terminal is open collector output. It is low at rotation mode and high when stopped. C1 is employed to stabilize VCC. Its capacitance is no less than 1μF. *7. HB Pin *3. Hall Input This pin is available to output a 1.25V Hall bias voltage. To avoid noise, the shortest line is recommended to connect with Hall stage which has about 20mV hysteresis. Thus, the ideal Hall input is 50mV or over. *8. VMIN Pin If this pin is disused, connect it directly with VPWM, the minimum duty cycle will be 10%. *4. COSC Capacitor May. 2011 Rev. 2. 4 BCD Semiconductor Manufacturing Limited 11 Data Sheet SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER AM4961 Mechanical Dimensions SSOP-16 Unit: mm(inch) 3.800(0.150) 4.000(0.157) 7° 0.200(0.008) 0.300(0.012) 7° 0.635(0.025) BSC 4.700(0.185) 5.100(0.201) Φ 0.800(0.031) 1.000(0.039) 0.100(0.004) 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 1.350(0.053) 1.550(0.061) 0.150(0.006) 0° R0.150(0.006) 0.250(0.010) 8° 0.250(0.010) R0.150(0.006) 8° 0.650(0.026) 0.200(0.008) 0.750(0.030) 0.250(0.010) 0.020(0.001) 0.050(0.002) Note: Eject hole, oriented hole and mold mark is optional. DETAIL A May. 2011 Rev. 2. 4 BCD Semiconductor Manufacturing Limited 12 Data Sheet SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER AM4961 Mechanical Dimensions (Continued) HTSSOP-14 Unit: mm(inch) 1. 470(0. 058) 1. 570(0. 062) 6. 350(0. 250) 6. 550(0. 258) Φٛ 1. 450(0. 057) 1. 550(0. 061) 6. 200(0. 244) 6. 600(0. 260) 4. 300(0. 169) 4. 500(0. 177) SEE DETAIL A Φ ٛ 0. 750(0. 030) 0. 850(0. 033) 0.200(0.008) or 1.480(0.058) 0.280(0.011) or 1.610(0.063) 0.100(0.004) 0.190(0.007) 0. 650(0. 026) BSC 1. 300(0. 051) BSC 1. 200(0. 047) MAX 0. 340(0. 013) 0. 200(0. 008) MIN 10° 14 ° R0. 090(0. 004) MIN BASE METAL 0.100(0.004) 0.150(0.006) 0.200(0.008) or 1.470(0.058) 0.240(0.009) or 1.570(0.062) R0. 090(0. 004) MIN 0. 540(0. 021) 0. 250(0. 010) BSC 0.050(0. 002) 0.200(0. 008) 0° 8° 0. 450(0. 018) 0. 750(0. 030) 0.900(0. 035) 1.050(0. 041) 1. 000(0. 039) REF DETAIL A Note: Eject hole, oriented hole and mold mark is optional. 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