LB1661

Ordering number: EN2551C Monolithic Digital IC LB1660N, 1661, 1664N, 1665 2-Phase Unipolar Brushless Motor Drivers Applications Package Dimensions unit : mm . 2-phase unipolar brushless motor (ex. DC brushless fan motor) drivers 3001B-DIP8 [LB1661N, 1661] Features and Functions . Output current : 1.5 A . On-chip output protect zener diodes : 60 V (LB1660N, . 1664N) stage withstand voltage: 85 V (LB1661, 1665) . Output On-chip hall input amplifier . On-chip protector against lock . With lock detect pin SANYO : DIP8 unit : mm 3054A-DIP16F [LB1664N, 1665] SANYO : DIP16F SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN O1096HA(II) 7037KI/6227TA No.2251-1/9 LB1660N, 1661, 1664N, 1665 Classification The LB1660 series are classified by the package and whether the on-chip output stage zener diode is used or not, as follows. Output stage zener diode With (VZ = 59 V) Without (Vor = 85 V) Package DIP8 (Pd = 1.2 W) DIP16F (Pd = 2.0 W) LB1660N LB1664N LB1661 LB1665 It is recommended to use the LB1661, 1665 in the following cases. 1 A capacitor is connected across the output and GND and the back emf is more than VZ = 59 V 2 External zener diodes are connected to absorb the kickback voltage. Pin Assignments Top view Truth Table IN+ H L H L IN− L H L H CR L L H H OUT1 H L H H OUT2 L H H H No.2551-2/9 LB1660N, 1661, 1664N, 1665 Equivalent Circuit Block Diagram and Sample Application Circui...