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| Ordering number: EN4392A Monolithic Digital IC LB1674V Brushless, Sensorless Motor Driver Overview The LB1674V is a small motor driver ideal for mini-cassettes, headphone stereos and micro-cassettes. Package Dimensions unit : mm 3175A-SSOP24 [LB1674V] Functions and Features c c c c c 3-phase unipolar, brushless, sensorless motor driver Reverse function Built-in speed control function (V servo) Built-in reference voltage (0.5 V) Soft switching driver SANYO : SSOP24 Specifications Absolute Maximum Ratings at Ta = 25C Parameter Maximum supply voltage Output transistor withstand voltage Maximum output current Allowable power dissipation Operating temperature Storage temperature Symbol VCC max Vsus Im max Pd max Topr Tstg Tj = 125C Conditions Ratings 5 10 0.6 0.4 0 to + 80 -40 to + 125 Unit V V A W C C Allowable Operating Range at Ta = 25C Parameter Supply voltage Symbol VCC Conditions Ratings 1.0 to 3.5 Unit V SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN 83096HA(II)/90793TS No.4392-1/6 LB1674V Electrical Characteristics at Ta = 25C, VCC = 1.5 V, unless otherwise noted Parameter Supply current Reference voltage Symbol ICC START pin: high START pin: low 0.47 Conditions min typ 6.5 0 0.50 1 -0.2 -0.06 0.01 140 -5 155 170 +5 3 max 10 10 0.53 1.5 Unit mA A V %/V mV/A %/C mV % %/V %/C 100 0.27 45 0.25 0.3 65 mV ms A V V V A Vref Vref Reference-voltage characteristic / VCC VCC = 1.0 to 3.5 V Vref Reference-voltage load characteristics Reference-voltage temperature characteristics Speed signal detection accuracy Speed signal interphase error Speed-signal voltage characteristics Speed-signal temperature characteristics Current detection accuracy Current detection ratio Starting pulse period COM* lead-in current Output saturation voltage Logic input high-level voltage Logic input low-level voltage TC pin lead-in current Vref Iref Vref / Ta Vref Vsp Iref = 0 to -50 A Ta = 0 to 80C VIN = 750 mV Vsp / VCC VCC = 1.0 to 3.5 V Vsp Vsp / Ta Vsp VRI KI TS ICOM* Vsat VH VL ITC VIN = 0.75 V, Ta = 0 to 80C VIN1 = 0.3 V, VIN2 = 1.0 V, RI = 330 VIN1 = 0.3 V, VIN2 = 1 to 1.3 V CS = 0.1 F VCC = 1.0 V, Im = 0.3 A 0.9 35 70 0.17 25 2 0.05 85 0.22 32 35 0.15 50 Allowable power dissipation, Pd max - W Pd max - Ta Ambient temperature, Ta - C Pin Assignment Top view No.4392-2/6 LB1674V Equivalent Circuit Block Diagram Supply bias Oscillator circuit Reference voltage Commutation and starting logic Soft switch Pre-driver Start detector Speed detector Error amplifier Current detector Sample Application Circuits at VCC = 1.5 V Note: PU, PV and PW are internal operation measurement pins. Unit (resistance: , capacitance: F) No.4392-3/6 LB1674V Pin Description Unit (resistance: ) Pin Number 1 3 23 Pin Name V W U Equivalent Circuit Description c Motor coil connection pins 2 22 24 DW DU DV c Power transistor base pins 4 5 GND OSC c Power and signal ground c Starting pulse period set pin 6 COM* c Start-up waveform detection circuit offset set pin 7 DR c Drive direction switch pin (normally low) 8 Vref c Reference voltage pin (0.5 V) 9 START c Start/stop control pin. Active-high 10 Vsp c Speed signal (motor induction voltage) detector Continued on next page. No.4392-4/6 LB1674V Continued from preceding page. Unit (resistance: ) Equivalent circuit Description c Speed signal error amplifier reference input pin Pin Number 11 Pin Name IN+ 12 OUT c Speed signal error amplifier output for motor current feedback 13 RI c Motor current detection pin 14 TC1 c Motor current rising/falling time constant set pins 15 TC2 c Motor current rising/falling time constant set pins 16 17 18 PW PU PV c Current waveform generator. Internal operation measurement pins. Must be left open. Continued on next page. No.4392-5/6 LB1674V Continued from preceding page. Unit (resistance: ) Equivalent circuit Description c Abnormal oscillation stop pin Pin Number 19 Pin Name FC 20 21 VCC GND c Power supply c Power and signal ground No products described or contained herein are intended for use in surgical implants, life-support systems, aerospace equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of which may directly or indirectly cause injury, death or property loss. Anyone purchasing any products described or contained herein for an above-mentioned use shall: 1 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: 2 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. Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. This catalog provides information as of August, 1996. Specifications and information herein are subject to change without notice. No.4392-6/6 |
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