LB1981 Sanyo, LB1981 Datasheet
LB1981
Related parts for LB1981
LB1981 Summary of contents
Page 1
... Ordering number : ENN5917 Overview The LB1981V is a three-phase brushless motor driver especially suited for use mainly with drum motors of portable VCRs. Features • Three-phase full-wave drive brushless sensorless motor drive • Soft switching drive • Power-saving speed control function due to motor voltage • ...
Page 2
... Reference voltage [PG amplifier] Input offset voltage Input bias voltage Common mode input voltage range Open loop gain Output ON voltage Output OFF voltage Schmitt amplifier hysteresis width Note: Items shown to be “*1” are not measured. LB1981V Symbol Conditions ...
Page 3
... Pd max - Ta 0.6 0.5 0.4 0.3 0.2 0.1 0 – Ambient temperature, Ta – ˚C LB1981V 1 U OUT 2 V OUT 3 STBY 4 FRC LB1981V CSLP1 CSLP2 10 PG OUT 11 PGC REF 100 OUT 28 COM ...
Page 4
... 2.7V to 10V 2. CLSP1 10 CLSP2 LB1981V Equivalent circuit 100k 3 100k 100k 4 100k 50k 5 50k Pin function When this pin is at 0.7V or less or when it is open, only the FG/PG amplifier operates ...
Page 5
... PG OUT 12 PGC 13 PGIN 2.0V max 1.0V min ( REF 15 FG 2.0V max IN 1.0V min ( 3V LB1981V Equivalent circuit 30k 1.5k 75k 100k 6 A 500 500 13 14 1.3V 35k 70k 200 9k 1k 10k 1. Pin function PG amplifier output pin ...
Page 6
... Continued from preceding page Pin number Pin name Pin voltage 18 PG OUT 19 OSC 20 FC1 22 FC2 21 FILTER LB1981V Equivalent circuit 30k 10k 10k 30k Pin function FG amplifier output pin. ...
Page 7
... GND COM 29 W OUT 1 U OUT 2 V OUT 30 RF LB1981V Equivalent circuit 30k 200 26 200 27 200 2k 3 3.9 Pin function Motor counterelectromotive voltage FG pulse pin. Outputs a pulse using W phase counterelectromotive voltage as FG ...
Page 8
... Block Diagram (Constants for external components depend on motor.) LB1981V Output drive circuit No. 5917-8/9 ...
Page 9
... 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, 1999. Specifications and information herein are subject to change without notice. LB1981V PS No. 5917-9/9 ...