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Semiconductor Components Industries, LLC, 2013
December, 2013
http://onsemi.com
LB1938FA
Overview
The LB1938FA is an H-bridge motor driver that supports low-voltage drive and features low-saturation
outputs in an ultraminiature slim package. The LB1938FA provides forward, reverse, brake, and standby
modes controlled by two input signals, and is an optimal DC motor driver for notebook personal computers,
digital cameras, cell phones, and other portable equipment.
Function
Ultraminiature Micro8 package (3.0mm x 4.9mm x 1.1mm)
The low saturation voltage means that the voltage applied to the motor is higher and IC heat generation is
reduced.
This allows this IC to be used in environments with higher ambient operating temperatures.
Output saturation voltage (high side + low side): V
O
sat = 0.15V typical (I
O
= 100mA)
The wide usable voltage range and the low standby mode current drain of 0.1 µA make this IC optimal for
battery operated equipment.
There are no constraints on the relationship between the input signal voltage and the supply voltage. For
example, this IC can be use at V
CC
= 3V and V
IN
= 5V.
Thermal protection circuit limits the drive current and prevents the IC from causing a fire or being destroyed
if the IC chip temperature reaches or exceeds 180°C due to large currents flowing when the outputs are
shorted due to, for example, motor layer shorting or other phenomena.
Typical Applications
DSC
Security camera
CCTV
Package Dimensions
unit : mm (typ)
Monolithic Digital IC
1ch, Low-saturation
Forward/Reverse Motor Driver
A
pp
lication Note
ILB01453
Pd max - Ta
Allowable Power Dissipation, Pd max - mW
Ambient Temperature, Ta -C
Mounted on a specified board
114.3mm76.1mm1.5 mm, glass epoxy resin
0
700
600
500
400
300
100
200
1200-30 6030 90
208
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