深圳市福田区宏科展销部 （非本站正式会员）

规格型号:  LMD18245T
厂商品牌:  NS
封装形式:  ZIP
生产批号:  11+
库存数量:  1000
标准包装:  20/管
产品描述: 进口原装深圳现货 ................................

公司名称：深圳市福田区宏科展销部

地址：深圳市福田区华强北路新亚洲二期N1A108

联系电话：0755-82566398

LMD18245
3A, 55V DMOS Full-Bridge Motor Driver
General Description
The LMD18245 full-bridge power amplifier incorporates all
the circuit blocks required to drive and control current in a
brushed type DC motor or one phase of a bipolar stepper
motor. The multi-technology process used to build the device
combines bipolar and CMOS control and protection circuitry
with DMOS power switches on the same monolithic structure.
The LMD18245 controls the motor current via a fixed
off-time chopper technique.
An all DMOS H-bridge power stage delivers continuous output
currents up to 3A (6A peak) at supply voltages up to 55V.
The DMOS power switches feature low RDS(ON) for high efficiency,
and a diode intrinsic to the DMOS body structure
eliminates the discrete diodes typically required to clamp bipolar
power stages.
An innovative current sensing method eliminates the power
loss associated with a sense resistor in series with the motor.
A four-bit digital-to-analog converter (DAC) provides a digital
path for controlling the motor current, and, by extension, simplifies
implementation of full, half and microstep stepper motor
drives. For higher resolution applications, an external
DAC can be used.
Features
n DMOS power stage rated at 55V and 3A continuous
n Low RDS(ON) of typically 0.3W per power switch
n Internal clamp diodes
n Low-loss current sensing method
n Digital or analog control of motor current
n TTL and CMOS compatible inputs
n Thermal shutdown (outputs off) at TJ = 155°C
n Overcurrent protection
n No shoot-through currents
n 15-lead TO-220 molded power package
Applications
n Full, half and microstep stepper motor drives
n Stepper motor and brushed DC motor servo drives
n Automated factory, medical and office equipment
Functional Block and Connection Diagram (15-Lead TO-220 Molded Power Package (T) )
DS011878-1
Order Number LMD18245T
See NS Package Number TA15A
April 1998
LMD18245 3A, 55V DMOS Full-Bridge Moto