LB1940T Datasheet, PDF (1/8 Pages) Sanyo Semicon Device – LB1940T

Ordering number : EN7232B
LB1940T
LB1940U
Monolithic Digital IC
2-ch H-Bridge Constant Current Driver
http://onsemi.com
Overview
The LB1940T and LB1940U are 2-phase exciter type bipolar stepper 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
Conditions
VS1, VS2, VDD
OUT1, OUT2, OUT3, OUT4
ENA1, ENA2, IN1, IN2, VC
Mounted on a specified board *
* Mounted on a Specified board: 114.3mm×76.1mm×1.6mm, glass epoxy
Ratings
Unit
-0.3 to +10.5
V
-0.3 to +10.5
V
400
mA
-0.3 to +10.5
V
800
mW
-20 to +85
°C
-55 to +150
°C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating
Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability.
Semiconductor Components Industries, LLC, 2013
June, 2013
D0512HK 20080624-S00002,B8-5952/D2706 MS IM/93004 JO IM No.7232-1/8