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

Also Recommended LM5102 Dual 100V High Side / Low Side Mosfet Driver LM5104 Dual 100V High Side / Low Side Mosfet Driver W/ Single Pwm Input LMD18200▲ LMD18245 Without Digital Control Circuitry MY BRIEFCASE                                       Click any "Briefcase" icon to add an item

	Block Diagram *click for larger image
Typical Performance *click for larger image

Datasheet

Title		Size	Date	Other Language
	LMD18245 3A, 55V DMOS Full-Bridge Motor Driver	1094 Kbytes	8-Feb-06	日本語

Featured Application Notes

Title		Size	Date	Other Language
	AN-694: Application Note 694 A DMOS 3A, 55V, H-Bridge: The LMD18200	408 Kbytes	26-Sep-02	日本語
	AN-828: Application Note 828 Increasing the High Speed Torque of Bipolar Stepper Motors	808 Kbytes	1-Oct-02	日本語

More Application Notes

Title		Size	Date	Other Language
	AN-828: Application Note 828 Increasing the High Speed Torque of Bipolar Stepper Motors	808 Kbytes	1-Oct-02	日本語
	AN-694: Application Note 694 A DMOS 3A, 55V, H-Bridge: The LMD18200	408 Kbytes	26-Sep-02	日本語

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Standard Pack Size
LMD18245T/NOPB LMD18245T RoHS	TO-220	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 33 AVNET-EM Worldwide 244 DIGIKEY Worldwide 2015 FARNELL Europe and Asia 612 FUTURE Worldwide 1100 KEIKONG Asia Pacific 2790 NEWARK Americas 328	$9.61 each at 1K+ pcs	rail of 20

Obsolete Versions

Obsolete Part	Alternate Part or Supplier	Source	Last Time Buy Date
LMD18245J-QML	NONE	NONE	08 Mar 2000

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LMD18245T	LMDMOS	0	17710	0	0	2470000	2	700869244

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.

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Obsolete Versions

Obsolete Part	Alternate Part or Supplier	Source	Last Time Buy Date
LMD18245J-QML	NONE	NONE	08 Mar 2000