LB1939T Datasheet Text
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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
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