參數(shù)資料
型號(hào)： LMD18245MWC
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： 運(yùn)動(dòng)控制電子
英文描述： STEPPER MOTOR CONTROLLER, 6 A, UUC
封裝： WAFER
文件頁(yè)數(shù)： 13/20頁(yè)
文件大小： 664K
代理商： LMD18245MWC
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
DMOS power stage rated at 55V and 3A continuous
q
Low RDS(ON) of typically 0.3 Ohm per power switch
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Internal clamp diodes
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Low-loss current sensing method
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Digital or analog control of motor current
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TTL and CMOS compatible inputs
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Thermal shutdown (outputs off) at TJ = 155°C
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Overcurrent protection
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No shoot-through currents
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15-lead TO-220 molded power package
q
Applications
Full, half and microstep stepper motor drives
q
Stepper motor and brushed DC motor servo drives
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Automated factory, medical and office equipment
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[Information as of 9-Aug-2002]
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National P/N LMD18245 - 3A, 55V DMOS Full-Bridge Motor Driver
file:///G|/imaging/BITTING/cpl_IMAGES/LMD18245.htm (2 of 2) [Aug-27-2002 6:18:22 PM]
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LMD18245T 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube
LMD18245T 制造商:Texas Instruments 功能描述:HALF BRIDGE 3A 55V 18245 TO22015
LMD18245T/HALF 制造商:Texas Instruments 功能描述:HALF BRIDGE 3A 55V 18245 TO22015
LMD18245T/LF15 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube
LMD18245T/NOPB 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 H-Bridge Motor Driver W/ Pwm RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube
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