LB1939T Datasheet | SANYO

Overview The LB1939T is a two-phase excitation bipolar stepping motor driver that features low voltage operation, a low saturation voltage, and low power consumption. It supports constant voltage and constant current drive, can control two iris motors, and is optimal for shutter, iris, and AF drive in 3 V battery operated still digital cameras and other battery operated equipment. Package Dimensions unit: mm 3246-TSSOP20 [LB1939T] 20 11 0.5 4.4 6.4 0.08 (1.0) 1.2max 0.15 6.5 Features - Low-voltage drive - Dual power supply operation: VS = 1.6 to 7.5 V, VDD = 1.9 to 6.5 V - Single power supply operation: VS = VDD = 1.9 to 7.5 V - Low saturation voltage output: Vosat = 0.3 V at IO = 200 m A - Supports constant voltage and constant current drive - Built-in reference voltage circuit (Vref = 0.9 V) - Miniature, thin form package (Thickness t = 1.1 mm) 0.65 (0.33) SANYO: TSSOP20 Specifications Absolute Maximum Ratings at Ta = 25°C Parameter Maximum supply voltage Applied output voltage Maximum output current: OUT1, 2, 3, and 4 Applied input voltage Allowable power dissipation Operating temperature Storage temperature Symbol VBmax VOUT IOmax VIN Pdmax Topr Tstg VS1, VS2, VDD OUT1, 2, 3, 4 t ≤ 10 ms ENA, IN, VC When mounted on a printed circuit board- Conditions Ratings - 0.3 to +10.5 - 0.3 to +10.5 400 10.5 0.8 - 20 to +85 - 55 to +150 Unit V V m A V W °C °C Note: Circuit board: 114.3 × 76.1 × 1.6 mm3 glass epoxy board Any and all SANYO products described or contained herein do not have specifications that can handle applications that require extremely high levels of reliability, such as life-support systems, aircraft’s control systems, or other applications whose failure can be reasonably expected to result in serious physical and/or material damage. Consult with your SANYO representative nearest you before using any SANYO products described or contained herein in such applications. SANYO assumes no responsibility for equipment failures that result from...