www.DataSheet.co.kr
Ordering number : ENN6194
Monolithic Digital IC
LB1939T
2 Channel H Bridge Constant Voltage/ Cons...
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...