Ordering number: EN 3120. | Monolithic Digital IC No.3120- | LB1670M Driver for Brushless, Sensorless Motors Applications . - Rotational control of brushless, sensorless motors for use in audio applications such as headphone stereos, (CD) radio-cassette recorders, CD players and other general-purpose applications Functions and Features - Bidirectional motor driver - Speed control function on-chip - STOP/START pin on-chip - Stable reference voltage on-chip (0.5V) - One comparator on-chip (NPN open collector output) - Wide operating voltage range (1.8 to 12V) Absolute Maximum Ratings at Ta= 25C unit Maximum Supply Voltage Veco max 15 V Output Transistor Voltage VotTr max 30 Vv Maximum Output Current ly max 1.5 A Allowable Power Dissipation Pd max 1 Ww Operating Temperature Topr 20t0o+80 C Storage Temperature Tstg 40to +125 C Allowable Operating Conditions at Ta= 25C unit Operating Voltage Range Veco op 1.8 to 12 V Electrical Characteristics at Ta = 25C, Veco=10V unless otherwise specified min typ max unit Current Dissipation Iecl STOP pin Low 95 13.5 mA Icc2 STOP pin High 065 1.0 mA Reference Voltage Vref 0.475 0.5 0.535 V powage Characteristic of AVref voc Vec=1.8 to 12V - 0.07 0.15 %/V Reference Voltage Vref [Koad Characteristic of AVref Iref=0 to 300pA 0.5 0.2 % Reference Voltage Vref Reeeraere Characteristicof Arefjnp) Ta=~20 to + 80C 0.01 SPC Reference Voltage Vref Continued on next page. Package Dimensions (unit:mm) 3073A-M30IC *) BRRARARARARARR 0.25 q 1 ,DEBEBRH REBAR HE ~ 7.9 * % {5 ais 15.3 sl w a ot Los SANYO: MFP30SLF SANYO Electric Co.,Ltd. Semiconductor Business Headquarters TOKYO OFFICE Tokyo Bidg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN 8319TA No.3120-1/5LB1670M Continued from preceding page. min typ max unit - Speed Signal Detection Accuracy Vsp Vin=1.0V 470 500 540 mV [ Diference between Two Phases of 5 5. % Speed Signal Voltage . , oltage Characteristic of AVSD jaVviog 0.15 03 %/V Speed Signal Vsp freee Characteristic of AVsp jar, 0.05 IC Speed Signal Vsp Output Saturation Voltage Vsat Im=0.3A,Vcc=1.8V 0.15 0.3 Vv Starting Pulse Time Ts Cs=1pF 40 ms Voltage Drop at COM Vcom@ 0.255 0.325 0.405 A [Conestable Multivibrator IMuL 9 13 165 ypA Output Current Comparator Offset Voltage Vorr ~10 0 16 mV Pin Assignment GND GND VC Ser INZ IN] MULTI FP @ orv 6 YSP OUT GND GND fo] (25) (A) (27) (ae) (5) fe] a) fae) far) fo) (rs) (rs) 7) fet LB16 70M TAT eA Oe we Se ee GND GND STOP VREF DR U DU RI VY DV W BW OSC GND GND top view Sample Application Circuit GNO GND VCC COM IN2Z IN} MULTI FP COM DRY IN YSP OUT GND GND LB1670M GNOGND STOP YREF DR UYU DU RI V DY W DW OSC GND GND 2 1 &/ [7] [] 19] te 2 1. 5 2 Ri Cs Cc) ci Cc Unit ( capacitance: F) No.3120-2/5LB1670M Oo Allowable Power Dissipation,Pd max W > o .o = nm o ~~ o hm Py max a 2 T Ambient Temperature,Ta C Equivalent Circuit Block Diagram COM OUT VREF MULT | com ) ose IN) O-_ - IN2. O___ OUT o Speed-error amplifier -freterence voltage]|~_-_.__ L o5V Beat-lock detector (monostable multivibrator) Pulse controller Le Lo] Direction control Lt Predriver detector Speed-signal -------__0 DR }+~0 F PULSE i Direction control Inputs | VCC Gk | sT0? ~+ GND ING) SP oo UD Vv DW No.3120-3/5LB1670M Pin Descriptions Pin Name Description Veco Power supply GND Ground for all pins, except output pins Rj Connected to a resistor which determines the response of the motor current detector circuit. U(V,W) Driver output pins DU (DV,DW) | Base of power transistor. To connect capacitors to ground for suppress oscillation of circuit. DR Direction control. Threshold voltage ; 1.5V STOP Halts all functions with setting High voltage. Threshold voltage : 1.5V Vref 0.5V reference for speed control OSC Capacitor connected to this pin determines the starting pulse frequency. Vsp Induced voltage detector. Level is approximately half that of the motors induced voltage. ING Input to the speed error amplifier. Connected to Vsp through a 1:1 current mirror circuit. OUT Output from the speed error amplifier. A resistor connectes it to RI, forming a current feedback loop. DRV Input to the final stage of the predriver. The motor stops when this pin is grounded, Applying a voltage greater than Vgp (transistor base-emitter voltage) rotates the motor at high speed. Voltage should not exceed 0.8V, F-PULSE Frequency pulse. Connecting this pin to Voc through a resistor of at least 20kQ generates a pulse each time the conducting phase changes. These pulses form a rough measure of motor speed. MULTI Monostable multivibrator. The capacitor attached to this pin determines the time constant of the monostable multivibrator used to generate a signal to prevent beat lock. COMS Commutator. Monitors the junction between the monostable multivibrator and the commutator to ensure that the former has the proper time constant. IN1 Negative input for drive circuits built-in comparator. IN2 Positive input for drive circuit's built-in comparator. COM-GUT Comparator output (open-collector NPN transistor output) M@ No products described or contained herein are intended for use in surgical implants, life-support systems, aerospace equipment, nuclear power contro! systems, vehicles, disaster/crime-prevention equipment: and the like, the failure of which may directly or indirectly cause injury, death or property loss, M Anyone purchasing any products described or contained herein for an above-mentioned use shall: @ Accept full responsibility and indemnify and defend SANYO ELECTRIC CO. LTD., its affiliates, subsidiaries and distributors and all their officers and employees, jointly and severally, against any and all claims and litigation and all damages, cost and expenses associated with such use: @ Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on SANYO ELECTRIC CO, LTD. its affiliates, subsidiaries and distributors or any of their officers and employees jointly or severally. Mi Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guarant- eed for volume production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringaments of intellectual property rights or other rights of third parties. No.3120-4/5LB1670M Setting Circuit Constants Circuit . Constants Setting Rs Speed adjustment, This resistance should be in the same range as Ro. R; Motor current detector. The circuit feeds this current back to the servo circuit. Note that the relative sizes of Rj, Rrand R, determine the motors torque characteristics, Rr Feedback from Rj toIN. This resistance is in the 10kQ to 50kQ range. Rp Speed detector. The chip generates a pulse at F-PULSE each time the conducting phase chages. This resistance should be at least 20kQ, Cm Beat lock detector, The larger this capacitance, the greater the monostable multivibrators time constant. A capacitance of 0.1pF, for example, results in a time constant of 2.2ms. The time constant selected should be slightly more than one- third the frequency at which the motor fails to turn. To determine the time constant, examine the waveform at MULTI while the motor is turning. Cs Starting pulse timing. The starting pulse interval is proportional to this capaci- tance. A capacitance of 1p F, for example, results in an interval of 40ms. Re Speed control. The ratio of this resistance to Sr determines the motor speed. The resistance should be in the 5kQ to 20kQ range. Setting Multivibrator Time Constant osv Multivibrator output waveform 0.2 ov (GND) Time constant This interval should be slightly more than one-third of the beat-lock interval. Calculating Torque Characteristics For a servo application, the percentage change in motor speed per 1gem of additional load is given by the following formula. aN t ... _RBeR N = Ky Veer Rr 100 (%) 1 1 Re Ri = Kr 05V' R, % 100 (%) where Kr is the torque constant (in gem/A). No.3120-5/5