LMD18245 - 3A, 55V DMOS Full-Bridge Motor Driver
Datasheet Packaging Samples & Pricing Reliability Knowledge Base

Features
DMOS power stage rated at 55V and 3A continuous
Low RDS(ON) of typically 0.3 per power switch
Internal clamp diodes
Low-loss current sensing method
Digital or analog control of motor current
TTL and CMOS compatible inputs
Thermal shutdown (outputs off) at TJ = 155°C
Overcurrent protection
No shoot-through currents
15-lead TO-220 molded power package

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. More...


Applications


Full, half and microstep stepper motor drives
Stepper motor and brushed DC motor servo drives
Automated factory, medical and office equipment
 

ParametersValues
Function Full Bridge Driver
Output Current 3000 mA
Channels 2 Channels
Supply Min 12 Volt
Supply Max 55 Volt
Temperature Min -40 deg C
Temperature Max 125 deg C


Typical Performance


*click for larger image


  Also Recommended
LM5102Dual 100V High Side / Low Side Mosfet Driver
LM5104Dual 100V High Side / Low Side Mosfet Driver W/ Single Pwm Input
LMD18200LMD18245 Without Digital Control Circuitry
Block Diagram
*click for larger image



Datasheet
RoHS Compliance Information Size in KbytesDate Click link below to Download
LMD18245 3A, 55V DMOS Full-Bridge Motor Driver 1094
Kbytes
8-Feb-06 Download
LMD18245 3A, 55V DMOS Full-Bridge Motor Driver (Japanese)
1206 Kbytes   Download

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Package Availability, Models, Samples & Pricing
Part NumberPackageFactory Lead TimeModelsSamples &
Electronic
Orders
Budgetary PricingStd
Pack
Size
Package
Marking
Format
TypePinsSpec.MSL
Rating
Peak
Reflow
RoHS
Report
CAD
Symbols
WeeksQtyQty$US each
LMD18245TTO-22015NOPB
STD
1
1
NA
NA
RoHS N/A Full productionN/A
Samples
Buy Now
1K+$9.61rail
of
20
NSUZXYTTE#
LMD18245T
P+
6 weeks100

Obsolete Versions

Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
LMD18245J-QML
NONE
NONE
08 Mar 2000

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.

Reliability Metrics


Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LMD18245TLMDMOS0177100024700002700869244

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

For more information on Reliability Metrics, please click here.


[Information as of 8-Nov-2009]