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PDF LB1937T Data sheet ( Hoja de datos )

Número de pieza LB1937T
Descripción 1-2 Phase Excitation Stepping Motor Driver
Fabricantes Sanyo Semicon Device 
Logotipo Sanyo Semicon Device Logotipo



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Ordering number : EN7231
LB1937T
Monolithic Digital IC
1-2 Phase Excitation
Stepping Motor Driver
Overview
The LB1937T is a 2-phase bipolar drive stepping motor driver IC that supports low-voltage drive and can drive two
stepping motors at the same time. The LB1937T's miniature package and minimal number of external components reduces
the required mounting area. It also provides high-efficiency motor drive and can reduce circuit current consumption. Since
it provides a current detection pin and supports PWM control input, it can be used to implement current chopper control at
the system level. The LB1937T is optimal for the stepping motors used for lens drive in digital cameras, printers, and
movie cameras.
Functions and Features
Low saturation voltage forward/reverse motor driver (VO sat = 0.3V at IO = 200mA)
Four H-bridge channels
Wide usable voltage range (Allowable voltage range: 2.5V to 9.5V, absolute maximum rating: 10.5V)
Supports PWM input (Low power consumption can be achieved in slow delay mode that uses IN1/IN2 = H/H logic.)
Motor (coil) current detection pin
Built-in thermal shutdown circuit
Thin form factor miniature package (TSSOP24)
Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to
"standard application", intended for the use as general electronics equipment (home appliances, AV equipment,
communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be
intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace
instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety
equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case
of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee
thereof. If you should intend to use our products for applications outside the standard applications of our
customer who is considering such use and/or outside the scope of our intended standard applications, please
consult with us prior to the intended use. If there is no consultation or inquiry before the intended use, our
customer shall be solely responsible for the use.
Specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein stipulate
the performance, characteristics, and functions of the described products in the independent state, and are not
guarantees of the performance, characteristics, and functions of the described products as mounted in the
customer's products or equipment. To verify symptoms and states that cannot be evaluated in an independent
device, the customer should always evaluate and test devices mounted in the customer's products or
equipment.
32207 TI PC B8-5899,7386 No.7231-1/7
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LB1937T pdf
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LB1937T
Truth Table
Input
Output
IN1 IN2 IN3 IN4 IN5 IN6 IN7 IN8 OUT1 OUT2 OUT3 OUT4 OUT5
LL
off off
LH
LH
HL
HL
HH
off H
(*) (*)
H off
LL
off off
LH
LH
HL
HL
HH
off H
(*) (*)
H off
LL
off
LH
L
HL
H
HH
off
(*) (*)
H
LL
LH
HL
HH
(*) (*)
L : low, H : high
*: The output logic mode when IN1/IN2 = H/H is determined by the immediately preceding IN1/IN2 mode.
The post-switching output modes will be as follows.
When switching from (2): (4)
When switching from (3): (4)'
When switching from (1): Undefined (Either (4) or (4)')
The modes when IN3/IN4 = H/H operate similarly as described below.
When switching from (6): (8)
When switching from (7): (8)'
When switching from (5): Undefined (Either (8) or (8)')
OUT6
off
H
L
H
off
OUT7
off
L
H
off
H
OUT8
off
H
L
H
off
Output
mode
(1)
(2)
(3)
(4)
(4)
(5)
(6)
(7)
(8)
(8)
(11)
(12)
(13)
(14)
(14)
(15)
(16)
(17)
(18)
(18)
No.7231-5/7
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