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LMD18245, LMD18245T, LMD18245T/NOPB

Table of contents:
Info of LMD18245
Info of LMD18245T
Info of LMD18245T/NOPB

LMD18245, LMD18245T, LMD18245T/NOPB Selling Leads, Datasheet

MFG:National Semiconductor Category:Integrated Circuits (ICs) Package Cooled:SIP D/C:08+/09+

LMD18245, LMD18245T, LMD18245T/NOPB Datasheet download

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Part Number: LMD18245T/NOPB

Category: Integrated Circuits (ICs)

MFG: National Semiconductor

Package Cooled: SIP

D/C: 08+/09+

Description: IC H BRIDGE 3A 55V TO-220

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LMD18245 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 R_DS(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)
LMD18245 MDC	LMDMOS	0	16810	0	0	2200000	2	624256007
LMD18245T	LMDMOS	0	16810	0	0	2200000	2	624256007

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.

LMD18245 Maximum Ratings

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
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LMD18245 Features

·DMOS power stage rated at 55V and 3A continuous
·Low RDS(ON) of typically 0.3W 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 T_J= 155°C
·Overcurrent protection
·No shoot-through currents
·15-lead TO-220 molded power package

LMD18245 Typical Application

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

LMD18245 Connection Diagram

LMD18245T/NOPB Parameters

Technical/Catalog Information	LMD18245T/NOPB
Vendor	National Semiconductor
Category	Integrated Circuits (ICs)
Applications	DC Motor Driver, Stepper Motor Driver, H Bridge
Number of Outputs	1
Voltage - Supply	12 V ~ 55 V
Voltage - Load	-
Current - Output	3A
Operating Temperature	-40°C ~ 125°C
Package / Case	TO-220-15 (Bent and Staggered Leads)
Packaging	Tube
Drawing Number	14; TA15A; ; 15
Lead Free Status	Lead Free
RoHS Status	RoHS Compliant
Other Names	LMD18245T NOPB LMD18245TNOPB LMD18245T ND LMD18245TND LMD18245T

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