LB1939T

www.DataSheet.co.kr Ordering number : ENN6194 Monolithic Digital IC LB1939T 2 Channel H Bridge Constant Voltage/ Constant Current Driver IC 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 mA 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) 1 0.22 10 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 t...