UTC A9849 LINEAR INTEGRATED CIRCUIT 3-phase motor driver for CD-ROMs DESCRIPTION The UTC A9849 is ICs developed for CD-ROM spindle motor drives. These ICs possess a short brake and reverserotation brake for two types of brake functions, and also contain FG output and rotation direction detection (FR) circuits,making them high-functionality and high-performance ICs. FEATURES HSOP-28 * Three-phase, full-wave, pseudo-linear drive system. * Built-in power save and thermal shutdown functions. * Built-in current limiter and Hall bias circuits. * Built-in FG output. * Built-in rotation direction detector. * Built-in reverse rotation prevention circuit. * Built-in short brake pin. APPLICATION * CD-ROM, CD-R, CD-RW, DVD-ROM, and DVD-RAM ABSOLUTE MAXIMUM RATINGS(Ta =25°C ) SYMBOL VALUE UNIT Applied Voltage ( with 5V Power Supply) PARAMETER Vcc 7 V Applied Voltage ( motor Power Supply1 ) VM1 16 V Applied Voltage ( motor Power Supply2) VM2 16 Power Dissipation Pd V 2200(note1) mW °C Operating Temperature Topr -20 ~ 75 Storage Temperature Tstg -55 ~ 15 (Note 2) °C 1300 (Note 3) mA Output Current Io Note 1:Reduced by 17.6mW for increase for Ta of 1°C over 25°C Note 2:Tj should not exceed 150°C Note 3:Tj should not exceed Pd or ASO value. RECOMMENDED OPERATING CONDITIONS(Ta =25°C ) PARAMETER Power Supply Voltage UTC SYMBOL MIN MAX UNIT Vcc VM1 4.25 3.0 5.5 15 V V VM2 3.0 15 V UNISONIC TECHNOLOGIES CO., LTD. 1 QW-R109-006,A UTC A9849 LINEAR INTEGRATED CIRCUIT BLOCK DIAGRAM 28 RNF DRIVER A8 A2 TSD 27 VM1 CURRENT SENSE AMP 26 VM2 2 4 DRIVER Vcc + - A1 7 GND 8 TL PS HALL AMP H1+ 9 + - H1- 10 + - H2+ 11 + - H2- 12 + - H3+ 13 + - TORQUE SENSE AMP 25 Vcc 24 FG 23 PS 22 Ec 21 ECR 20 FR 18 SB 17 CNF 15 VH + Vcc DRQ CK Q SHORT BRAKE HALL BIAS H3- 14 UTC UNISONIC TECHNOLOGIES CO., LTD. 2 QW-R109-006,A UTC A9849 LINEAR INTEGRATED CIRCUIT PIN DESCRIPTIONS PIN NO. PIN NAME 2 A3 Output 4 A2 Output 7 A1 Output 8 GND + FUNCTOIN GND Hall Signal Input 9 H1 10 H1- Hall Signal Input 11 H2+ Hall Signal Input 12 H2- Hall Signal Input 13 H3 + Hall Signal Input 14 H3- Hall Signal Input 15 VH Hall Bias 17 CNF For connection of phase compensation capacitor 18 SB Short brake 20 FR Rotation direction detection 21 ECR Output voltage control reference 22 EC Output voltage control 23 PS Power save 24 FG FG signal output 25 Vcc Power Supply VM2 Motor Power Supply 2 27 VM1 Motor Power Supply 1 28 RNF For connection of output current detection resistor FIN - 26 UTC SUB GND UNISONIC TECHNOLOGIES CO., LTD. 3 QW-R109-006,A UTC A9849 LINEAR INTEGRATED CIRCUIT INPUT/OUTPUT CIRCUIT (1) Power save (2) Torque command input 33K PS 1K 1K ECR Ec 10K Fig.1 Fig.2 (3) Torque output (A1,A2,and A3) VM2 VM1 External resistor (RNF) RNF A1 A2 A3 GND Fig.3 (4) Hall input (H1+,H1-,H2+,H2-,H3+,H3-) Hn+ 1K 1K Fig.4 Note: Resistance values are typical values. UTC UNISONIC TECHNOLOGIES CO., LTD. 4 QW-R109-006,A UTC A9849 LINEAR INTEGRATED CIRCUIT (6) FG output VH (5) Hall Bias 10K FG 100K Fig.5 Fig.6 (8) Short brake (7) FR output 8K 30K SB FR 10K Fig.8 Fig.7 Note: Resistance values are typical values. UTC UNISONIC TECHNOLOGIES CO., LTD. 5 QW-R109-006,A UTC A9849 LINEAR INTEGRATED CIRCUIT ELECTRICAL CHARACTERISTICS (Ta =25°C ,VCC=5V,VM1=12V,VM2=12V,UNLESS OTHERWISE NOTED.) PARAMETER SYMBOL TEST CONDITIONS MIN TYP. MAX UNIT Total device Circuit current 1 Icc1 In the power save ON state 0 0.2 mA Circuit current 2 Icc2 In the power save OFF state 4.1 6.5 mA 1.5 V Power save ON voltage range VPSON OFF voltage range VPSOFF Hall bias Hall bias voltage VHB Hall amplifier Input bias current 3.5 IHB=10mA 0.5 IHA Same phase input voltage range VHAR 1.5 Minimum input level VINH 50 H3 hysteresis levle VHYS 10 Torque command Input Voltage range EC V 0.9 1.5 V 0.7 3.0 µA 4.0 20 40 4.0 V -50 -20 mV mV 1.0 “-“offset voltage ECOFF- ECR=2.5V -80 “+“offset voltage 20 ECOFF+ ECR=2.5V Input Bias Current ECIN ECR= EC I/O gain GEC EC=1.5V,2.0V 0.41 FG FG Output high level voltage VFGH IFG= -20µA 4.5 4.8 FG Output low level voltage VFGL IFG=3mA 0 0.25 Duty (reference value) DU V mVp-p mV 50 80 0.5 2.0 µA 0.51 0.61 A/V 0.4 V V 50 % Rotation detection FR output high level voltage VFRH VFRH= -20µA 4.1 4.4 FR output low level voltage VFRL IFR= 3A 0 0.25 0.4 V Output Output saturation high level voltage VOH IO= -600mA 1.0 1.5 V Output saturation low level voltage VOL IO= 600mA 0.4 0.8 V Pre-drive current IVML EC=0V output open 35 70 mA 700 840 mA 1.5 V Output limit current Short brake On voltage range ITL VSBON OFF voltage range VSBOFF * Not designed forradiation resistance. UTC 560 V 3.5 V UNISONIC TECHNOLOGIES CO., LTD. 6 QW-R109-006,A UTC A9849 LINEAR INTEGRATED CIRCUIT Circuit operation (1) Hall input to coil output The phase relationship between the Hall input signals and the output current and voltage is shown in Fig.9. The motor position data input via the Hall pins is amplified by the Hall amplifier, and formed into waveforms by the matrix block.These signals are input to the output driver that supplies the drive current to the motor coils. H1+ H2+ H3+ 30° A1 output current H1-+H2+ A1 output voltage A2 output current H2-+H3+ A2 output voltage A3 output current H3-+H1+ A3 output voltage Fig.9 UTC UNISONIC TECHNOLOGIES CO., LTD. 7 QW-R109-006,A UTC A9849 LINEAR INTEGRATED CIRCUIT (2) Torque command The RNF pin voltage with respect to the torque command (EC) is as follows: Forward Offset voltage " - " VM-RNF (V) Offset voltage " + " 3mV 2.5 EC(V) Fig.10 The I / O gain (GEC) from the EC pin to the RNF pin (output current) is determined by the RNF detector resistor. GEC = 0.255 / RNF [A / V] The torque limit current ITL is given by: ITL = 0.35 / RNF [A] ROTATION DIRECTION Ec<ECR FORWARD Ec>ECR REVERSE* *Stops after detecting reverse (3) Reverse rotation detection function H 2+ H2- + - H 3+ H3- + - D-FF D Q CK Ec ECR H:Output .OPEN (HIGH-IMPEDANCE) + Fig.11 UTC UNISONIC TECHNOLOGIES CO., LTD. 8 QW-R109-006,A UTC A9849 LINEAR INTEGRATED CIRCUIT FR SIGNAL OUTPUT PIN FORWARD L REVERSE H The reverse detection circuit construction is shown in Fig.11. (1) Forward (EC < ECR) The phase relationship between the Hall input signals H2+ and H3+ becomes as shown in Fig.9, and the reverse rotation detection circuit does not operate. (2) Reverse (EC > ECR) The phase relationship between the signals H2+ and H3+ is opposite that for forward operation, and the reverse rotation detection circuit operates. The output goes OFF, and becomes open circuit. (4) Short brake When 3.5V or more is applied to the short brake pin, the upper-side output transistors of all go off, and the lowerside output transistors go on. Short braking operates regardless of the torque command signal. (5) Other circuits When 3.5V or more is applied to the power save pin, all circuits are on. When 1.5V or less is applied, the IC enters power save mode. Also, the Hall bias pins turn on and off with the power save pin. Application example RNF 28 DRIVER A2 4 A1 7 GND 8 H1+ 9 HALL 1 H110 H2 + 11 HALL 2 HALL 3 VM1 27 TSD A3 2 CURRENT SENSE AMP VM2 26 Vcc Vcc 25 DRIVER + - PS 23 PS HALL AMP TORQUE SENSE AMP + - + + - + - H3 + 13 + - Ec 22 SERVO SIGNAL ECR 21 Vcc FR 20 D RQ CK Q H212 VM Vcc FG 24 TL + - RNF SHORT BRAKE SB 18 CNF 17 VH 15 HALL BIAS H314 FIN Fig.12 UTC UNISONIC TECHNOLOGIES CO., LTD. 9 QW-R109-006,A UTC A9849 LINEAR INTEGRATED CIRCUIT *Operation notes (1) Power save The power save input is an I / O circuit like the own shown in Fig.1. The thermal derating characteristics of the power save pin is –8mV / °C, and the resistance will fluctuate between ±30% so be careful of the input voltage range. (2) Hall input The input circuit shown in Fig.4 is used for the Hall inputs. The Hall elements can be connected either in series or in parallel. (3) Thermal shutdown (TSD) When the junction temperature reaches 175°C, the A1, A2, and A3 coil outputs go open circuit. The thermal shutdown has approximately 15°C of hysteresis. Vcc Vcc H1 H2 H1 H2 H3 H3 (Hall bias) Parallel connection UTC (Hall bias) Series connection UNISONIC TECHNOLOGIES CO., LTD. 10 QW-R109-006,A UTC A9849 LINEAR INTEGRATED CIRCUIT ELECTRICAL CHARACTERISTIC CURVES 2.2 2.0 5.0 1.0 4.0 3.0 2.0 1.0 0 100 125 25 50 75 Ambient Temperature : Ta (℃) 0 0 150 Saturation Voltage: VOL (V) VM VM-0.2 VM-0.4 VM-0.6 VM-0.8 VM-1.0 7 0.8 0.6 0.4 0.2 VM-1.2 VM-1.4 0 5 6 1 2 3 4 Power Supply Voltage : Vcc(V) 0 Figure.17 Low -side Output Saturation Voltage vs.Output Current 1.0 Figure.16 Upper-side Output Saturation Voltage vs.Output Current Saturation Voltage: VOH (V) Figure.15 Power Supply Current vs.Power Supply Voltage 6.0 Circuit Current :Icc (mA) Power Dissipation:Pd (W) Figure.14 Package Derating Characteristics 200 800 400 600 Output Current :Io (mA) 1000 0 0 200 800 400 600 Output Current :Io (mA) 1000 UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. UTC UNISONIC TECHNOLOGIES CO., LTD. 11 QW-R109-006,A