LMD18245

Name: LMD18245
Brand: TI
SKU: LMD18245
Price: 10.95 USD

現行

3A，55V DMOS 全橋馬達驅動器

立即訂購

產品規格表

document-pdfAcrobat LMD18245 3A, 55V DMOS Full-Bridge Motor Driver datasheet (Rev. E) (英文)

LMD18245

現行

產品規格表

立即訂購

產品詳細資料

Number of full bridges

1

Vs (min) (V)

12

Peak output current (A)

6

RDS(ON) (HS + LS) (mΩ)

300

Control mode

PWM

Control interface

Hardware (GPIO)

Features

Current sense Amplifier

Rating

Catalog

Operating temperature range (°C)

-40 to 125

Number of full bridges

1

Vs (min) (V)

12

Peak output current (A)

6

RDS(ON) (HS + LS) (mΩ)

300

Control mode

PWM

Control interface

Hardware (GPIO)

Features

Current sense Amplifier

Rating

Catalog

Operating temperature range (°C)

-40 to 125

TO-220 (NDL)

15

191.6915 mm² 20.02 x 9.575

DMOS Power Stage Rated at 55V and 3A Continuous
Low R_DS(ON) of Typically 0.3Ω 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 Package

All trademarks are the property of their respective owners.

DMOS Power Stage Rated at 55V and 3A Continuous
Low R_DS(ON) of Typically 0.3Ω 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 Package

All trademarks are the property of their respective owners.

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.

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.

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