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| Data Sheet SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER General Description 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 TSSOP-20(EDP) and HTSSOP-14 packages. AM4961 Features * * * * * * * * 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 TSSOP-20(EDP) HTSSOP-14 Figure 1. Package Types of AM4961 Jun. 2008 Rev. 2. 2 1 BCD Semiconductor Manufacturing Limited Data Sheet SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER Pin Configuration G Package (TSSOP-20(EDP)) AM4961 PGND PGND PGND OUT2 VCC VMIN VPWM COSC FG RD 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 PGND PGND PGND OUT1 GND CT VREF HINHB HIN+ Jun. 2008 Rev. 2. 2 2 BCD Semiconductor Manufacturing Limited Data Sheet SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER Pin Configuration (Continued) AM4961 GH Package (HTSSOP-14) PGND PGND OUT2 VCC VMIN VPWM COSC FG RD 1 2 3 4 5 6 7 14 13 12 11 10 9 8 OUT1 GND CT VREF HINHB HIN+ Figure 2. Pin Configuration of AM4961 (Top View) Jun. 2008 Rev. 2. 2 3 BCD Semiconductor Manufacturing Limited Data Sheet SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER Pin Description Pin Number Pin Name TSSOP-20(EDP) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 1 2 3 4 5 6 7 8 9 10 11 12 13 14 HTSSOP-14 PGND PGND PGND OUT2 VCC VMIN VPWM COSC FG RD HIN+ HB HINVREF CT GND OUT1 PGND PGND PGND Power ground Power ground Power ground Driver output 2 Power supply Minimum duty setting Adjustable Input Oscillator capacitor Rotation speed indicator Rotation/lock state indicator Hall sensor input + Hall sensor bias regulator Hall sensor input Reference voltage regulator Lock and rotation setting capacitor terminal Ground for control circuit Driver output 1 Power ground Power ground Power ground Function AM4961 Jun. 2008 Rev. 2. 2 4 BCD Semiconductor Manufacturing Limited Data Sheet SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER Functional Block Diagram AM4961 9 (6) COSC 8 (5) FG Oscillation Circuit Thermal Shutdown VPWM VMIN 7 (4) 10 (7) 6 (3) RD Pre-driver VREF 14 (11) Voltage Reference 5 (2) VCC HB HIN+ HIN- 12 (9) Hall Bias Control Circuit 4 (1) 11 (8) 13 (10) OUT2 Hysteresis Amp Lock Shutdown and Auto Restart 15 (12) 16 (13) 1, 2, 3, 18, 19, 20 17 (14) OUT1 CT A (B) A for 20-pin GND PGND B for 14-pin Figure 3. Functional Block Diagram of AM4961 Jun. 2008 Rev. 2. 2 5 BCD Semiconductor Manufacturing Limited Data Sheet SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER Truth Table HINH L H L H L H L HIN+ L H L H L H L H L H H L H L COSC (Note 1) CT OUT1 H L OFF L H OFF OFF OFF OUT2 L H L OFF OFF H OFF OFF FG L OFF L OFF L OFF L OFF OFF Lock Protection L Rotation (Recirculate) Rotation (Drive) RD Mode AM4961 Note 1: VOSC (H) >VPWM, VOSC (L) AM4961 Circuit Type E1: Lead Free G1: Green TR: Tape and Reel Blank: Tube Package G: TSSOP-20(EDP) GH: HTSSOP-14 Package Temperature Range Part Number Lead Free AM4961G-E1 Green AM4961G-G1 AM4961GTR-G1 AM4961GH-G1 Marking ID Lead Free AM4961G AM4961G AM4961GH Green AM4961G-G1 AM4961G-G1 AM4961GH-G1 AM4961GH-G1 Packing Type Tube Tape & Reel Tube Tape & Reel TSSOP-20 (EDP) -30 to 105oC AM4961GTR-E1 AM4961GH-E1 -30 to 90oC AM4961GHTR-E1 AM4961GHTR-G1 AM4961GH 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. Jun. 2008 Rev. 2. 2 6 BCD Semiconductor Manufacturing Limited Data Sheet SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER Absolute Maximum Ratings (Note 2) Parameter Supply Voltage Output Current Output Voltage HB Output Current VPWM Input Voltage RD Output Voltage FG Output Voltage RD Output Current FG Output Current Symbol VCC IOUT VOUT IHB VPWM VRD VFG IRD IFG TSSOP-20(EDP) Power Dissipation (Note 3) Storage Temperature Range ESD (Human Body Model) ESD (Machine Model) PD TSTG ESD ESD HTSSOP-14 -55 to 150 2000 250 Value 18 1.2 18 10 6 18 18 10 10 1.5 1.1 Unit V A V mA V V V mA mA W W oC AM4961 V V 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 Supply Voltage Hall Input Voltage + (Note 4) Hall Input Voltage - (Note 4) Ambient Temperature (Note 5) Symbol VCC VIN+ VINTA Min 3.5 0.2 0.2 -30 Typ 12 Max 16 3 3 105 Unit V V V o C Note 4: Hall input voltage range includes the amplitude of signal. Note 5: For TSSOP-20(EDP) package only. External heatsink shall larger than 15.24mm*3.81mm to ensure the IC is available at TA=105oC. Jun. 2008 Rev. 2. 2 7 BCD Semiconductor Manufacturing Limited Data Sheet SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER Electrical Characteristics (VCC=12V, TA=25oC, unless otherwise specified.) Parameter Quiescent Current IQ2 VREF Voltage Output Saturation Voltage at High Side Output Saturation Voltage at Low Side COSC Frequency COSC High Level Voltage COSC Low Level Voltage Hall Input Hysteresis Hall Bias Voltage CT High Level Voltage CT Low Level Voltage CT Charge Current CT Discharge Current CT Charge and Discharge Ratio FG Output Low Level Voltage FG Leakage Current RD Output Low Level Voltage RD Leakage Current VREF VSATH VSATL fOSC VOSCH VOSCL VHYS VHB VCTH VCTL ICHG IDHG RCD VFGL ILFG VRDL ILRD ICHG/IDHG IFG=5mA VFG=12V IRD=5mA VRD=12V 0.2 IHB=5mA 1.1 3.55 1.55 1.5 0.14 8.5 Lock on IREF=5mA ISOURCE=200mA ISINK=200mA COSC=100pF 18 3.45 1.83 6.25 5.8 8 6 1.0 0.2 25 3.6 1.95 10 1.25 3.7 1.7 2 0.2 10 0.2 10.55 6.2 1.17 0.3 32 3.75 2.07 20 1.4 3.88 1.85 2.55 0.255 14.5 0.3 30 0.3 30 V A V A V V V KHz V V mV V V V A A Symbol IQ1 Lock off Conditions Min 11.24 Typ 15 Max 18.76 mA Unit AM4961 Jun. 2008 Rev. 2. 2 8 BCD Semiconductor Manufacturing Limited Data Sheet SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER Typical Performance Characteristics AM4961 20 20 VCC=12V 16 TA=25 C 16 O Rotation Mode Rotation Mode IQ1 (mA) IQ1 (mA) 12 12 8 8 4 4 0 -50 0 0 50 100 150 200 4 6 8 10 12 14 16 18 TA ( C) O VCC (V) Figure 4.Quiescent Current vs. Ambient Temperature Figure 5. Quiescent Current vs. Supply Voltage 2.0 2.0 VCC=12V 1.5 VCC=12V 1.5 VSATH (V) VSATL (V) 1.0 1.0 0.5 0.5 0.0 0 200 400 600 800 1000 0.0 0 200 400 600 800 1000 IOUT (mA) IOUT (mA) Figure 6. Output Saturation Voltage (High) vs. Output Current Figure 7. Output Saturation Voltage (Low) vs. Output Current Jun. 2008 Rev. 2. 2 9 BCD Semiconductor Manufacturing Limited Data Sheet SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER Typical Performance Characteristics (Continued) AM4961 1.2 2.8 2.4 2.0 External Heatsink Size:15.24mm*3.81mm 1.0 0.8 PD (W) 1.6 1.2 PD (W) No External Heatsink 0.6 0.4 0.8 0.2 0.4 Package: TSSOP-20(EDP) 0.0 0 40 80 105 120 160 0.0 Package: HTSSOP-14 No External Heatsink -20 0 20 40 60 80 90 100 TA ( C) O TA ( C) O Figure 8. Power Dissipation vs. Ambient Temperature Figure 9. Power Dissipation vs. Ambient Temperature Jun. 2008 Rev. 2. 2 10 BCD Semiconductor Manufacturing Limited Data Sheet SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER Operating Diagram VPWM adjustable Voltage Lowest speed setting voltage fOSC=25kHz (COSC=100pF) Vosc VMIN Voltage AM4961 COSC Output Vosc Low Speed PWM Variable High Speed VCC 0V FG Output Figure 10. Operating Diagram of AM4961 (Note 6) Note 6: 1. Low Speed Setting Mode 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. 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 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. Jun. 2008 Rev. 2. 2 11 BCD Semiconductor Manufacturing Limited M Data Sheet SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER Typical Application AM4961 VCC D1 C1 1F or greater R1 27k L1 R2 10k AM4961 4 (1) 5 (2) 6 (3) OUT2 VCC VMIN VPWM COSC FG 1,2,3,18,19,20 OUT1 GND CT VREF HINHB 17 (14) 16 (13) 15 (12) 14 (11) 13 (10) 12 (9) 11 (8) R4 39k R6 330k 7 (4) 8 (5) 9 (6) 10 (7) PWM R3 7.5k Hall RD PGND HIN+ C4 0.47F R7 100k C2 0.33F C3 100pF 68k R8 R5 100k Figure 11. Typical Application of AM4961 (Note 7) Jun. 2008 Rev. 2. 2 12 BCD Semiconductor Manufacturing Limited Data Sheet SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER Typical Application (Continued) Note 7: *1. Ground Line Layout PGND is connected to motor supply stage and GND is connected to control stage. All ground lines from control stage are connected to GND. *2. Stability of Power Supply *9. Exposed Pad (For TSSOP-20(EDP) package only) C1 is employed to stabilize VCC. Its capacitance is no less than 1F. *3. Hall Input 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. *4. COSC Capacitor When CCP is 100pF, the COSC frequency will be 25kHz. *5. FG Output FG output terminal is open collector output which varies with phase change. *6. RD Output RD output terminal is open collector output. It is low at rotation mode and high when stopped. There is an exposed pad at the bottom of IC. If operating current is high, it is recommended to solder external heatsink closely with this pad by tin to ensure better temperature characteristics. EXPOSED PAD *9 AM4961 *7. HB Pin This pin is available to output a 1.25V Hall bias voltage. *8. VMIN Pin If this pin is disused, connect it directly with VPWM, the minimum duty cycle will be 10%. Jun. 2008 Rev. 2. 2 13 BCD Semiconductor Manufacturing Limited Data Sheet SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER Mechanical Dimensions TSSOP-20(EDP) Unit: mm(inch) AM4961 6.400(0.252) 6.600(0.260) 4.100(0.161) 4.300(0.169) 2.900(0.114) 3.100(0.122) 4.300(0.169) 4.500(0.177) EXPOSED PAD 6.200(0.244) 6.600(0.260) 0.000(0.000) INDEX0.750(0.030)Dp 0.850(0.033) 0.100(0.004) #1 PIN 0.650(0.026)TYP 0.100(0.004) 0.190(0.007) 4-10 14 TOP & BOTTOM 0.200(0.008)MIN R0.090(0.004)MIN 0.900(0.035) 1.050(0.041) 0.340(0.013) 0.540(0.021) 1.200(0.047) MAX 0.050(0.002) R0.090(0.004)MIN 0.150(0.006) 0.250(0.010)TYP 0 8 0.200(0.008) 0.280(0.011) 0.450(0.018) 0.750(0.030) 1.000(0.039) REF Jun. 2008 Rev. 2. 2 14 BCD Semiconductor Manufacturing Limited Data Sheet SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER Mechanical Dimensions (Continued) HTSSOP-14 1.470(0.058) 1.570(0.062) AM4961 Unit: mm(inch) 6.350(0.250) 6.550(0.258) 1.450(0.057) 1.550(0.061) 6.200(0.244) 6.600(0.260) 0.750(0.030) 0.850(0.033) 4.300(0.160) 4.500(0.177) SEE DETAIL A 0.650(0.026) BSC 1.300(0.051) BSC 1.200(0.047) MAX 0.340(0.013) 0.540(0.021) 0.200(0.008) MIN R0.090(0.004) MIN R0.090(0.004) MIN 0.250(0.010) BSC 10 14 0.050(0.002) 0.200(0.008) 0.900(0.035) 1.050(0.041) 0.450(0.018) 0.750(0.030) 1.000(0.039) REF DETAIL A 0 8 Jun. 2008 Rev. 2. 2 15 BCD Semiconductor Manufacturing Limited 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. BCD Semiconductor Manufacturing Limited does not assume any responsibility for use of any its products for any particular purpose, nor does BCD Semiconductor Manufacturing Limited assume any liability arising out of the application or use of any its products or circuits. BCD Semiconductor Manufacturing Limited does not convey any license under its patent rights or other rights nor the rights of others. MAIN SITE - Headquarters BCD Semiconductor Manufacturing Limited BCD Semiconductor Manufacturing Limited - Wafer Fab No. 1600, Zi Xing Road, Shanghai ZiZhu Science-based Industrial Park, 200241, China Shanghai SIM-BCD Semiconductor Manufacturing Limited Tel: +86-21-24162266, Fax: +86-21-24162277 800, Yi Shan Road, Shanghai 200233, China Tel: +86-21-6485 1491, Fax: +86-21-5450 0008 REGIONAL SALES OFFICE Shenzhen Office REGIONAL SALES OFFICE - Wafer Fab BCD Semiconductor Manufacturing Limited Shanghai Design Group - IC SIM-BCD Semiconductor Manufacturing Co., Ltd. 800 Yi Shan Road, Shanghai 200233, China Corporation Advanced Analog Circuits (Shanghai) Tel: +86-21-6485 900, Yi Shan Road, Shanghai 200233, China 8F, Zone B, 1491, Fax: +86-21-5450 0008 Tel: +86-21-6495 9539, Fax: +86-21-6485 9673 USA Office BCD Semiconductor Corp. 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