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www.fairchildsemi.com FAN8729 Spindle+4-CH Motor Drive IC Features * * * * * * * * * * Built-in Power Save Circuit Built-in Current Limit Circuit Built-in Thermal Shutdown Circuit (TSD) Built-in TSD Monitor Circuit Built-in FG Signal Output Circuit Built-in Rotational Direction Detecting Circuit Built-in Protection Circuit For Reverse Rotation Built-in 4-CH Balanced Transformerless (BTL) Driver Built-in BTL MUTE Circuit (CH123 and CH4) Corresponds to 3.3V DSP Description The FAN8729 is a monolithic integrated circuit built-in 4Channel BTL motor and spindle motor drivers, which can drive tracking actuator, focus actuator, sled motor, loading motor, 3-phase BLDC motor, and it is applicable to DVD-P/ MDP/CAR-MD/CAR-NAVIGATION systems. 48-QFPH-1414 Typical Application * * * * Mini Disk Player Digital Video Disk Player Car Mini Disk Player Car navigation System Ordering Information Device FAN8729 FAN8729_NL* note Package 48-QFPH-1414 48-QFPH-1414 Operating Temperature -35C ~ +85C -35C ~ +85C *Note: NL: Lead free Type Rev. 1.0.0 (c)2003Fairchild Semiconductor Corporation FAN8729 Pin Assignments MUTE123 VREF123 MUTE4 SVCC2 INS+ INS- OUTS VM3 PC1 48 H1+ 1 47 46 45 44 43 42 41 40 39 VM4 38 37 36 NC H1- 2 VREF4 35 SS DO4- H2+ 3 34 DO4+ H2- 4 33 DO3- H3+ 5 32 DO3+ H3- 6 31 PGND2 FAN8729 FG 7 30 DO2DIR 8 29 DO2+ SVCC1 9 28 DO1- VM1 10 27 DO1+ CS1 11 26 OPOUT PGND1 12 13 A3 14 A2 15 A1 16 SGND 17 NC 18 TSD_M 19 IN4 20 IN3 21 IN2 22 IN1 23 VM2 24 OPIN+ 25 OPIN- 2 FAN8729 Pin Definitions Pin Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 Pin Name H1+ H1H2+ H2H3+ H3FG DIR SVCC1 VM1 CS1 PGND1 A3 A2 A1 SGND NC TSD_M IN4 IN3 IN2 IN1 VM2 OPIN+ OPINOPOUT DO1+ DO1DO2+ DO2PGND2 DO3+ DO3I/O I I I I I I O O I O O O O I I I I I I O O O O O O O Hall1(+) Input Hall1(-) Input Hall2(+) Input Hall2(-) Input Hall3(+) Input Hall3(-) Input FG Output Direction Signal VCC1 BLDC Motor Power Supply Current Sensor Power Ground1 3-Phase Output 3 3-Phase Output 2 3-Phase Output 1 Signal Ground NC TSD Monitor CH4 Input CH3 Input CH2 Input CH1 Input BTL CH1,2 Supply Voltage Normal OP-AMP Input(+) Normal OP-AMP Input(-) Normal OP-AMP Output BTL Drive 1 Output(+) BTL Drive 1 Output(-) BTL Drive 2 Output(+) BTL Drive 2 Output(-) BTL Power Ground2 BTL Drive 3 Output(+) BTL Drive 3 Output(-) Pin Function Description 3 FAN8729 Pin Definitions (Continued) Pin Number 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 Pin Name DO4+ DO4NC VREF4 VM4 VM3 SVCC2 VREF123 MUTE123 MUTE4 SS OUTS INSINS+ PC1 I/O O O I I I I I O I I I Pin Function Description BTL Drive 4 Output(+) BTL Drive 4 Output(-) NC BTL CH4 Reference BTL CH4 Motor Supply BTL CH3 Motor Supply BTL Signal VCC BTL CH1,2,3 Reference BTL CH1,2,3 Mute BTL CH4 Mute Spindle Start/Stop OP-AMP Spindle Output OP-AMP Spindle Input(-) OP-AMP Spindle Input(+) Phase Compesation Cap. 4 FAN8729 Internal Block Diagram MUTE123 FIN(GND) MUTE4 VREF123 SVCC2 INS+ INS- OUTS PC1 48 47 46 45 44 43 42 41 40 VM3 SS 39 VM4 38 VREF4 37 H1+ H1H2+ H2H3+ H3- 1 36 NC 2 35 DO4- EC ECR VM4 Hall Amp 3 23.5dB 5K 34 DO4+ 4 Absolute Values VM1 CS1 20K VM3 33 DO3DO3+ 5 Current Sense Amp Output Current Limit 5K 20K 23.5dB 32 6 31 PGND2 FG1X Generator Detection FIN(GND) Logic VM2 FIN(GND) FG DIR 7 Reverse Rotation 10K 20K VM2 17.5dB 30 DO2- 8 29 DO2+ SVCC1 VM1 9 17.5dB 28 DO1DO1+ Distributor 10 10K 20K 27 CS1 11 26 OPOUT PGND1 12 Driver TSD_M 25 OPIN- 13 14 15 16 17 18 19 20 21 22 23 24 TSD_M 5 FIN(GND) OPIN+ IN4 SGND IN3 IN2 IN1 A1 NC VM2 A3 A2 FAN8729 Equivalent Circuits FG Signal Output Phase Compensation Capacitor 7 25 0.5K 2K 48 Current Detector Start/Stop 100K 11 5K 44 25 50K 30K BTL Drive Mute BTL Bias Voltage 42 43 25 50K 30K 37 41 25 50 6 FAN8729 Equivalent Circuits (Continued) 3-Phase Rotational Direction Output BTL Drive Output 8 25 20K 27 28 29 30 32 33 34 35 30K 3-Phase Output TSD_M 15K 13 14 15 18 BTL Input(CH1,2) BTL Input(CH3,4) 21 22 25 5K 19 20 25 10K OP-AMP Input SVCC OP-AMP Output SVCC 2K 24 1K 2K 25 1K 26 2K 2K 7 FAN8729 Absolute Maximum Ratings (Ta=25C) Parameter Supply Voltage (Spindle Signal) Supply Voltage (BTL Signal) Supply Voltage (Spindle Motor) Supply Voltage (BTL Motor) Power Dissipation Operating Temperature Range Storge Temperature Range Maximum Output Current (Spindle Part) Maximum Output Current (BTL Part) Symbol SVCC1max SVCC2max VM1max VM2,3,4max Pd Topr Tstg IOMAXS IOMAXB Value 7 15 15 15 2.7note -35 ~ +85 -55 ~ +150 1.3 1 Unit V V V V W C C A A Note: 1. When mounted on the PCB (phenolic resin material) of which size is 114mm x 76mm x1.6mm. 2. Power dissipation is reduced with the rate of -21.6mW/C for TA25C. 3. Do not exceed Pd and SOA. Pd[mW] 3,000 2,000 1,000 0 0 25 50 75 100 125 150 175 Ambient Temperature, Ta[ C] SOA Recommended Operating Conditions (Ta=25C) Parameter Operating Supply Voltage (Spindle Signal) Operating Supply Voltage (BTL Signal) Operating Supply Voltage (Spindle Motor) Operating Supply Voltage (BTL Motor) Symbol SVCC1 SVCC2 VM1 VM2,3,4 Min. 4.5 4.5 4.5 4.5 Type. Max. 5.5 13.2 13.2 SVCC2 Unit V V V V 8 FAN8729 Electrical Characteristics (Unless otherwise specified, Ta=25C, SVCC1=5V, VM1=8V, BTL driver part: SVcc2=9V, VM2=5V, RL1=8, VM3=8V, VM4=9V, RL2=15) Parameter Circuit Current 2 START/STOP SS On Voltage Range SS Off Voltage Range HALL AMP Hall Bias Current Common Mode Voltage Range Minimum In Level TORQUE CONTROL EC Input Voltage Range Offset Voltage (-) Offset Voltage (+) Input Current In/Output Gain FG FG Output Voltage (L) Input Voltage Range OUTPUT BLOCK Saturation Voltage (Upper TR) Saturation Voltage (Lower TR) Torque Limit Current DIRECTION DETECTOR DIR Output Voltage (L) VDIRL IDIR=10uA 0.5 V VOH VOL ITL IO= -300mA IO=300mA RCS=0.5 560 0.9 0.2 700 1.6 0.6 840 V V mA VFHL VFGR IFG=10uA Hn+, Hn- Input D-range 1.5 0.5 4.0 V V EC ECOFFECOFF+ ECIN GEC ECR=1.65V ECR=1.65V EC=ECR=1.65V ECR=1.65V, RCS=0.5 0.5 -100 20 -5 0.56 -50 50 -1 0.71 3.3 -20 100 0.84 V mV mV uA A/V IHA VHAR VINH 1.5 60 1 5 4.0 uA V mVpp VSSON VSSOFF L-H Circuit On H-L Circuit Off 2.5 1.0 V V Symbol ICC2 Condition Start/Stop =5V Min. Typ. 4.5 Max. Unit mA 9 FAN8729 Electrical Characteristics (continued) (Unless otherwise specified, Ta=25C, SVCC1=5V, VM1=8V, BTL driver part: SVcc2=9V, VM2=5V, RL1=8, VM3=8V, VM4=9V, RL2=15) Parameter BTL DRIVE PART Quiescent Circuit Current CH MUTE123 Off Voltage CH MUTE123 On Voltage CH MUTE4 Off Voltage CH MUTE4 On Voltage Output Offset Voltage Maximum Output Voltage1,2 Close Loop Voltage Gain Ripple Rejection Slew Rate Ratio*note 1,2*note ICC3 VMOFF123 VMON123 VMOFF4 VMON4 VOF1,2 VOM1,2 GVC1,2 RR1,2 SR1,2 VOF3 VOM3 GVC3 RR3 SR3 VOF4 VOM4 GVC4 RR4 SR4 VOF IB1 VOHOP VOLOP ISINK ISOURCE GVOOP RROP SROP CMRROP Gain*note Pin42 = Variation Pin42 = Variation Pin43 = Variation Pin43 = Variation VIN = 1.65V VIN = 1.65V f=1kHz, VIN= -0.1Vrms f=120Hz, VIN= -20dB f=120Hz, 2Vp-p VIN = 1.65V VIN = 1.65V f= 1kHz, VIN= -0.1Vrms f= 120Hz, VIN= -20dB f= 120Hz, 2Vp-p VIN = 1.65V VIN = 1.65V f= 1kHz, VIN= -0.1Vrms f= 120Hz, VIN= -20dB f= 120Hz, 2Vp-p f= 1kHz, VIN= -75dB f= 120Hz, VIN= -20dB f= 120Hz, 2Vp-p f= 1kHz, VIN= -20dB 2.5 2.5 -50 3.6 15.5 -100 6.5 21.5 -100 7.0 21.5 -20 8 16.5 4.0 17.5 60 1.0 7.0 23.5 60 1.0 7.5 23.5 60 1.0 5.5 4.5 75 65 1 80 1.0 1.0 +50 19.5 +100 25.5 +100 25.5 +20 300 0.1 mA V V V V mV V dB dB V/us mV V dB dB V/us mV V dB dB V/us mV nA V V mA mA dB dB V/us dB Symbol Condition Min. Typ. Max. Unit CH1,2 Actuator Driver (SVCC2=9V VM2=5V,RL1=8) CH3 BTL Driver (SVCC2=9V, VM3=8V, RL2=15) Output Offset Voltage3 Maximum Output Voltage3 Close Loop Voltage Gain Ripple Rejection Slew Rate 3*note Output Offset Voltage4 Maximum Output Voltage4 Close Loop Voltage Gain Ripple Rejection Ratio4*note Slew Rate 4*note OP- AMP Input Offset Voltage Input Bias Current High Level Output Voltage Low Level Output Voltage Output Sink Current Output Source Current Open Loop Voltage Slew Rate* note Ratio3*note CH4 BTL Driver (SVCC2=9V, VM4=9V, RL2=15) Ripple Rejection Ratio*note Common Mode Rejection Ratio*note Note: Guaranteed field.(No EDS/Final test) 10 FAN8729 Application Information 1. MUTE Function * MUTE circuit turns BTL output ON/OFF. * When MUTE terminal (pin42, pin43) is OPEN, or terminal voltage is lower than 1V, BTL is disable. * When MUTE terminal (pin42, pin43) is voltage is higher than 1.5V, BTL output operates normally. * Feature Table. MUTE circuit voltage Above 1.5V Below 1V or Open MUTE status OFF ON 42 43 2. TSD Function * TSD circuit intercepts all IC output to protect the IC against high temperatures. * When chip temperature rises above 165C, BTL and spindle output is disable. SVCC IREF R1 Q0 R2 Hysteresis Ihys R3 Output driver Bias * When chip temperature falls below 140C, BTL and spindle output operates normally. * TSD has hysteresis of 25C. 3. TSD Monitor Function TSD monitor circuit displays TSD status. When TSD is ON, pin18 is HIGH. When TSD is OFF, pin18 is LOW. Since output pin(PIN18) is open-collector, pull-up resistance should be attached outside. * Feature Table. TSD TSD On TSD Off Pin18 High Low * * * * VCC SVCC R(external) TSD 18 20k Q6 Q5 11 FAN8729 4. CH1,2,3,4 Balanced Transformerless (BTL) Drive R3 Pref R2 Vin 19 20 21 22 37 41 Vref123,4 R1 R3 DO+ 34 32 29 27 LEVEL SHIFT M 35 33 Pref R3 R3 DO- 30 28 * Diagram above shows each input/output BTL channel structure. * When BTL input voltage is Vref, the output voltage is Pref. Pref has the value of VM/2. * BTL Channel's output voltage is found as follows; R2 R3 x (1 + ) x (Vin - Vref ) R1 R3 R2 R3 Do- = Pr ef - x (1 + ) x (Vin - Vref ) R1 R3 Do+ = Pr ef + * BTL gain value is found as follows; Gain = 4 x R2 R1 12 FAN8729 5. Spindle VM1 Rcs VM1 VRCS Io VAMP ECR + + - TSD Torque sense amp Current sense amp Gain Controller Driver M EC Power Driver * The spindle driver circuit consists of 3 section: Torque sense amp, Current sense amp, and Power driver. * Torque sense amp compares and amplifies EC and ECR signals from SERVO, and sends them to current sense amp. With voltage comparison, it determines the signal as forward or reverse. * Current sense amp limits the current in Motor(Io) by comparing output current signal from torque sense amp with the current of RCS. * Power driver output the current to the motor based on the current generated form current sense amp. * Feature Table VRNF[V] Reverse Forward Ecoff- Ecoff+ Rotation EC < ECR 3mV -50 0 +50 Forward rotation Stop after detecting reverse rotation ECR-EC[mV] EC > ECR 13 FAN8729 6. Calculation of Gain & Torque Current VM1 Io VM1 Current / Voltage Convertor Output Vs Current sense + Rcs CS1(Pin11) R1 + Driver + Negative Feedback loop U Io Vin ER ECR Gm + Absolute Values Power Transistors V W + + Vmax VM1 Max. output current limiting Commutation Distributor H1 H2 H3 * Toque limit circuit limits the current of spindle motor. * Driver amp circuit limits the current of spindle motor by comparing the voltage detected from RCS and the voltage output from torque sense map. * Output current of the motor can be limited by adjusting the RCS value. * Maximum output current of motor is found as follows; Io[mA] = V max 350mV = Rcs Rcs * VMAX within IC is fixed at 350mV. * Gm of torque sense amp is set to 0.71. 14 FAN8729 7. Rotational Direction Detecting Function * Rotation detection circuit gives the result to DIR pin by detecting the MD's rotational direction. * Detects the MD's rotational direction using hall signals H2 and H3. * Feature Table. Rotation EC < ECR EC > ECR Forward Reverse DIR Low High H3+ H3+ - H2+ H2- + - 8 DIR R D Q CK D-F/F * In case of forward rotational detection, the phase of hall signal shows as H3 H2 H1 as follows; H1 H2 H3 (b) * In case of reverse rotational detection, the phase of hall signal shows as H1 H2 H3 as follows; H1 H2 H3 (a) * Forward/Reverse rotational direction is decided as follows. When hall signal H3 is falling edge, if H2 shows "High", the rotational direction is "Forward", and if H2 shows "Low", rotational direction is "Reverse". 15 FAN8729 8 Reverse Rotation Preventing Function Current S ens e Amp ECR EC + - H2+ H2- + - R D Q H3+ H3- + - CK D-F/F Gain controller Driver M Reverse rotation prevention circuit has a function for intercepting the reverse rotation of MD. When SERVO control input is EC * * * * Rotation Forward Reverse H2 H L H3 HL HL D-F/F H L DIR L H 16 FAN8729 8. FG Output Function * FG circuit outputs the number of motor rotation. * One pulse per rotation is output of FG. * FG uses hall signal H1 as its input, and creates output using hysteresis comparator. * Input/Output wavelength is shown below; 7 FG Output H1+ H1+ - H1 FG 17 FAN8729 9. Hall Input Output Timing Chart * Output voltage and current wavelength of each of the 3-phase hall input is shown below. * The following diagram is the motor's output wavelength in the forward rotation direction. H1+ H2+ H3+ A1 output current A1 output voltage A2 output current A2 output voltage A3 output current A3 output voltage 18 FAN8729 Typical Performance Characteristics SVCC1 vs ICC2 6.00 5.50 ICC2(mA) ICC3(mA) 15.0 14.0 13.0 12.0 11.0 10.0 SVCC2 vs ICC3 5.00 4.50 4.00 3.50 3.00 4.5 4.6 4.7 4.8 4.9 5.0 5.1 SVCC1(V) 5.2 5.3 5.4 5.5 4.5 5.5 6.5 7.5 8.5 9.5 SVCC2(V) 10.5 11.5 12.5 13.5 V IN1 vs V OUT1 (V REF=1.65V , V M2=5V ) 6.0 4.0 VOUT1(V) 0.0 -2.0 -4.0 -6.0 0.0 1.0 2.0 V IN1(V ) 3.0 VOUT2 2.0 V IN2 vs V OUT2 (V REF=1.65V , V M2=5V ) 6.0 4.0 2.0 0.0 -2.0 -4.0 -6.0 0.0 0.5 1.0 1.5 2.0 V IN2(V ) 2.5 3.0 V IN3 vs V OUT3 (V REF=1.65V , V M3=12V ) 12.0 8.0 VOUT3(V) 4.0 0.0 -4.0 -8.0 -12.0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 V IN3(V ) VOUT4(V) V IN4 vs V OUT4 (V REF=1.65V , V M4=12V ) 12.0 8.0 4.0 0.0 -4.0 -8.0 -12.0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 V IN4(V ) 19 FAN8729 Typical Performance Characteristics SVCC2 vs GVC1 19.5 19.0 18.5 GCV1(dB) GVC2(dB) 19.5 19.0 18.5 18.0 17.5 17.0 16.5 16.0 15.5 4.5 SVCC2 vs GVC2 18.0 17.5 17.0 16.5 16.0 15.5 4.5 5.5 6.5 7.5 8.5 9.5 10.5 11.5 12.5 13.5 5.5 6.5 7.5 8.5 9.5 10.5 11.5 12.5 13.5 SVCC(V) SVCC2(V) SVCC2 vs GVC3 25.5 25.0 24.5 25.5 25.0 24.5 SVCC2 vs GVC4 GVC3(dB) 24.0 23.5 23.0 22.5 22.0 21.5 4.5 5.5 6.5 7.5 8.5 9.5 10.5 11.5 12.5 13.5 GVC4(dB) 24.0 23.5 23.0 22.5 22.0 21.5 4.5 5.5 6.5 7.5 8.5 9.5 10.5 11.5 12.5 13.5 SVCC2(V) SVCC2(V) INS+ vs ITL (V REF=1.65V ) 800 ITL(mA) 600 400 200 0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 INS+(V ) 20 FAN8729 Test Circuits Hall Signal Generation V OPOUT OPIN+ OPIN- A A A 48 PC1 47 INS+ 46 INS- 45 OUTS 44 SS 43 MUTE4 42 MUTE123 41 VREF123 40 SVCC2 39 VM3 38 VREF4 VM4 37 NC 36 2 A A A A A A 1 2 3 4 5 6 H1+ H1H2+ H2H3+ H3- DO4- 35 V 1 2 RL1 RL2 DO4+ 34 DO333 V 31 1 RL1 RL2 DO3+ 32 PGND2 V 7 10uA FAN8729 FG DIR SVCC1 DO2- 30 DO2+ 29 DO1- 28 DO1+ 27 TSD_M OPOUT 26 OPIN25 OPIN+ 24 2 2 V 1 RL1 RL2 8 V SVCC1 A 9 V 1 RL1 RL2 10 VM1 11 CS1 VM1 IN4 A2 A1 A3 12 13 14 15 16 17 18 IN3 19 20 21 22 c a c a c a b b b RL 300mA 300mA RL RL OPIN+ V OPINV 1M OPOUT VCC 50 1M V 10uF V 21 OPOUT OPIN+ OPIN- V V V V A VM2 IN2 IN1 NC V PGND1 SGND 23 FAN8729 Typical Application Circuits Servo Torque Control System Control CH123 Mute 0.1uF 48 PC1 1 HALL1 2 47 INS+ 46 INS45 OUTS 44 SS 43 MUTE4 42 MUTE123 41 VREF123 40 SVCC2 39 VM3 38 VREF4 VM4 37 36 H1+ H1- VREF4 NC DO435 CH4 Mute M 3 HALL2 4 H2DO3DO3+ 33 H2+ D04+ 34 Loadng M 5 HALL3 6 H3PGND2 31 H3+ 32 Sled Motor FG Signal Rotate Direction 7 FG FAN8729 DO230 Focus 8 DIR DO2+ 29 9 SVCC1 DO128 Tracking 10 VM1 11 CS1 TSD_M SGND PGND1 A1 13 VM2 OPOUT OPIN+ OPIN25 24 IN3 IN2 26 VM1 DO1+ 27 IN4 14 NC A2 A3 12 15 16 17 18 19 20 21 IN1 22 23 Servo Amp Notes: Radiation pin is connected to the internal GND of the package. Tracking Loading VREF Sled Focus 22 FAN8729 Package Dimensions 48-QFPH-1414 17.20 0.30 14.00 0.20 17.20 0.30 14.00 0.20 #48 #1 +0.10 0.30 -0.05 0.10MAX (0.825) 0.65 3.00MAX 2.60 0.10 +0.10 0.20 -0.05 0.00~0.25 (4.85) 0~8 0.10MAX 0.80 0.20 23 FAN8729 DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. LIFE SUPPORT POLICY FAIRCHILD'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user. www.fairchildsemi.com 11/4/03 0.0m 001 Stock#DSxxxxxxxx 2003 Fairchild Semiconductor Corporation 2. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. |
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