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Ordering number : EN7232A
LB1940T LB1940U
Overview
Monolithic Digital IC
2-ch H-Bridge Constant ...
www.DataSheet.co.kr
Ordering number : EN7232A
LB1940T LB1940U
Overview
Monolithic Digital IC
2-ch H-Bridge Constant Current Driver
The LB1940T and LB1940U are 2-phase exciter type bipolar stepping motor driver ICs that feature low-
voltage, (supporting 3V battery) and low current operation with low saturation
voltage. These ICs enable constant-current control of actuators, and are optimal for driving the actuators of PC peripherals such as USB compatible scanners, FDDs, and printers, as well as for controlling the shutter, iris, and AF of a digital still camera.
Features
Low-
voltage driving 2-power source type: VS = 1.6 to 7.5V, VDD = 1.9 to 6.5V Single power source type: VS = VDD = 1.9 to 7.5V Low saturation output: VO(sat) = 0.3V at IO of 200mA Constant-current control Built-in reference
voltage (Vref = 0.9V) Small-sized, low-profile package (LB1940T: TSSOP20; 225mil; thickness (t) = 1.2mm max.) (LB1940U: MSOP20; thickness (t) = 0.85mm max.)
Specifications
Absolute Maximum Ratings at Ta = 25°C
Parameter Maximum supply
voltage Output applied
voltage Output Current Input applied
voltage Allowable power dissipation Operating temperature Storage temperature Symbol VB max VOUT max IO max VIN max Pd max Topr Tstg ENA1, ENA2, IN1, IN2, VC Mounted on a specified board * VS1, VS2, VDD OUT1, OUT2, OUT3, OUT4 Conditions Ratings -0.3 to +10.5 -0.3 to +10.5 400 -0.3 to +10.5 800 -20 to +85 -55 to +150 Unit V V mA V mW °C °C
* Mounted on a Specified board: 114.3mm×76.1mm...