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參數(shù)資料
| 型號： | LMD18245 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | 3A, 55V DMOS Full-Bridge Motor Driver |
| 中文描述： | 第3A，55V的DMOS全橋式電動(dòng)機(jī)驅(qū)動(dòng)器 |
| 文件頁數(shù)： | 1/18頁 |
| 文件大?。?/td> | 647K |
| 代理商： | LMD18245 |
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 struc-
ture. The LMD18245 controls the motor current via a fixed
off-time chopper technique.
An all DMOS H-bridge power stage delivers continuous out-
put currents up to 3A (6A peak) at supply voltages up to 55V.
The DMOS power switches feature low R
for high ef-
ficiency, and a diode intrinsic to the DMOS body structure
eliminates the discrete diodes typically required to clamp bi-
polar 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, sim-
plifies implementation of full, half and microstep stepper mo-
tor drives. For higher resolution applications, an external
DAC can be used.
Features
n
DMOS power stage rated at 55V and 3A continuous
n
Low R
DS(ON)
of typically 0.3
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 T
J
= 155C
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
L
1998 National Semiconductor Corporation
DS011878
www.national.com
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LMD18245_06 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:3A, 55V DMOS Full-Bridge Motor Driver |
| 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 |
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