UNISONIC TECHNOLOGIES CO., LTD UA9849 LINEAR INTEGRATED CIRCUIT 3-PHASE MOTOR DRIVER FOR CD-ROMS DESCRIPTION The UTC UA9849 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 * 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. HSOP-28 Lead-free: UA9849L Halogen-free: UA9849G ORDERING INFORMATION Normal UA9849-SH1-T Ordering Number Lead Free UA9849L-SH1-T www.unisonic.com.tw Copyright © 2008 Unisonic Technologies Co., Ltd Halogen Free UA9849G-SH1-T Package Packing HSOP-28 Tube 1 of 11 QW-R109-006,B UA9849 LINEAR INTEGRATED CIRCUIT PIN DESCRIPTION PIN # 2 4 7 8 9 10 11 12 13 14 15 17 18 20 21 22 23 24 25 26 27 28 FIN PIN NAME A3 A2 A1 GND H1+ H1H2+ H2H3+ H3VH CNF SB FR ECR EC PS FG VCC VM2 VM1 RNF - FUNCTOIN Output Output Output GND Hall Signal Input Hall Signal Input Hall Signal Input Hall Signal Input Hall Signal Input Hall Signal Input Hall Bias For connection of phase compensation capacitor Short brake Rotation direction detection Output voltage control reference Output voltage control Power save FG signal output Power Supply Motor Power Supply 2 Motor Power Supply 1 For connection of output current detection resistor SUB GND UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 11 QW-R109-006,B UA9849 LINEAR INTEGRATED CIRCUIT BLOCK DIAGRAM 28 RNF 27 VM1 26 VM2 25 VCC 24 FG 23 PS 22 EC 21 ECR 20 FR 18 SB 17 CNF 15 VH DRIVER TSD A8 2 CURRENT SENCE AMP A2 4 DRIVER VCC + - TL A1 7 GND 8 PS HALL AMP TORQUE SENSE AMP + H1+ 9 H1- 10 H 2+ 11 + 12 H 3+ 13 VCC + - H2- + - R D Q CK Q + SHORT BREAK + HALL BIAS H3- 14 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 11 QW-R109-006,B UA9849 LINEAR INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL RATINGS UNIT Applied Voltage ( with 5V Power Supply) VCC 7 V Applied Voltage ( motor Power Supply1 ) VM1 16 V Applied Voltage ( motor Power Supply2) VM2 16 V Output Current(Note 4) IOUT 1.3 A Power Dissipation(Note 2) PD 2.2 W Operating Temperature TOPR -20 ~ 75 °C Storage Temperature(Note 3) TSTG -55 ~ 150 °C Note: 1. Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. 2. Reduced by 17.6mW for increase for TA of 1°C over 25°C 3. TJ should not exceed 150°C 4. TJ should not exceed PD or ASO value. RECOMMENDED OPERATING CONDITIONS (TA =25°C) PARAMETER Power Supply Voltage SYMBOL VCC VM1 VM2 MIN 4.25 3.0 3.0 TYP MAX 5.5 15 15 UNIT V ELECTRICAL CHARACTERISTICS (TA=25°C, VCC=5V, VM1=12V, VM2=12V, unless otherwise specified.) PARAMETER SYMBOL TEST CONDITIONS Total Device Circuit Current 1 ICC1 In the power save ON state Circuit Current 2 ICC2 In the power save OFF state Power Save ON Voltage Range VPSON OFF Voltage Range VPSOFF Hall Bias Hall Bias Voltage VHB IHB=10mA Hall Amplifier Input Bias Current IHA Same Phase Input Voltage Range VHAR Minimum Input Level VINH H3 Hysteresis Level VHYS Torque Command Input Voltage Range EC “-“Offset Voltage ECOFFECR=2.5V “+“Offset Voltage ECOFF+ ECR=2.5V Input Bias Current ECIN ECR= EC I/O Gain GEC EC=1.5V,2.0V FG FG Output High Level Voltage VFGH IFG= -20µA FG Output Low Level Voltage VFGL IFG=3mA Duty (Reference Value) DU Rotation Detection FR Output High Level Voltage VFRH VFRH= -20µA FR Output Low Level Voltage VFRL IFR= 3A UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw MIN TYP. MAX UNIT 0 4.1 0.2 6.5 mA mA 1.5 V V 0.9 1.5 V 0.7 3.0 4.0 20 40 µA V mVP-P mV -50 50 0.5 0.51 4.0 -20 80 2.0 0.61 V mV mV µA A/V 0.4 V V % 3.5 0.5 1.5 50 10 1.0 -80 20 0.41 4.5 0 4.8 0.25 50 4.1 0 4.4 0.25 0.4 V V 4 of 11 QW-R109-006,B UA9849 LINEAR INTEGRATED CIRCUIT ELECTRICAL CHARACTERISTICS(Cont.) PARAMETER SYMBOL Output Output Saturation High Level Voltage VOH Output Saturation Low Level Voltage VOL Pre-Drive Current IVML Output Limit Current ITL Short Brake On Voltage Range VSBON OFF Voltage Range VSBOFF Note: Not designed forradiation resistance. TEST CONDITIONS TYP. MAX UNIT 560 1.0 0.4 35 700 1.5 0.8 70 840 V V mA mA 1.5 V V IO= -600mA IO= 600mA EC=0V output open UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw MIN 3.5 5 of 11 QW-R109-006,B UA9849 LINEAR INTEGRATED CIRCUIT INPUT/OUTPUT CIRCUIT (1) Power Save (2) Torque Command Input (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-) UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 6 of 11 QW-R109-006,B UA9849 LINEAR INTEGRATED CIRCUIT INPUT/OUTPUT CIRCUIT(Cont.) (5) Hall Bias (6) FG Output (7) FR Output 30K FR Fig.7 (8) Short Brake Note: Resistance values are typical values. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 7 of 11 QW-R109-006,B UA9849 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. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 8 of 11 QW-R109-006,B UA9849 LINEAR INTEGRATED CIRCUIT CIRCUIT OPERATION(Cont.) (2) Torque command The RNF pin voltage with respect to the torque command (EC) is as follows: 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(Note) Note: Stops after detecting reverse (3) Reverse rotation detection function H2+ H2- + - H3+ H3- + - D-FF D Q CK Ec ECR H:Output .OPEN (HIGH-IMPEDANCE) + Fig.11 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. (3) 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. (4) 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. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 9 of 11 QW-R109-006,B UA9849 LINEAR INTEGRATED CIRCUIT TYPICAL APPLICATION RNF 28 DRIVER VM1 27 TSD A3 2 CURRENT SENSE AMP A2 4 DRIVER VCC PS TORQUE SENSE AMP H1+ + - H2+ 11 HALL 2 H212 H3+ 13 PS 23 EC 22 + - + SERVO SIGNAL ECR 21 + - D CK + R FR 20 Q Q SB SHORT BRAKE 18 CNF 17 + - HALL 3 HALL BIAS H314 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw VM 24 8 10 VCC 25 FG TL GND H1- VM2 26 + - A1 HALL 1 RNF VH 15 10 of 11 QW-R109-006,B UA9849 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 (Hall bias) Series connection 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. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 11 of 11 QW-R109-006,B