DRV8421

現行

18V、2A 雙半橋馬達驅動器

立即訂購

產品規格表

document-pdfAcrobat DRV8421 18V 2A Dual H-Bridge Stepper Driver datasheet (英文) PDF | HTML

DRV8421

現行

產品規格表

立即訂購

產品詳細資料

Vs ABS (max) (V)

20

Vs (min) (V)

4

Peak output current (A)

2

Control mode

PWM

Control interface

Hardware (GPIO)

Number of full bridges

2

RDS(ON) (HS + LS) (mΩ)

900

Features

Low-Power Sleep Mode

Rating

Catalog

Operating temperature range (°C)

-40 to 125

Vs ABS (max) (V)

20

Vs (min) (V)

4

Peak output current (A)

2

Control mode

PWM

Control interface

Hardware (GPIO)

Number of full bridges

2

RDS(ON) (HS + LS) (mΩ)

900

Features

Low-Power Sleep Mode

Rating

Catalog

Operating temperature range (°C)

-40 to 125

HVSSOP (DGQ)

10

14.7 mm² 3 x 4.9

SSOP (DFU)

10

29.4 mm² 4.9 x 6

Dual H-Bridge Motor Driver
- Single/Dual Brushed DC
- Stepper
- Solenoids
4 to 18V Operating Supply Voltage Range
Low ON-resistance: HS + LS = 900mΩ (Typical, 25°C)
High Output Current per H-Bridge
- 2A Maximum Driver Current at 12V and TA = 25°C
- Parallel Mode Available Capable of 4A Maximum Driver Current at 12V and TA = 25°C
Device versions:
- DRV8421A (4-wire input): Independent Half Bridge Control
- DRV8421B (2-wire input): Sleep Mode, Fault detect
Similar LV Stepper Drivers:
- DRV8410: 1.65 to 11V (800mΩ RDS(ON))
- DRV8411: 1.65 to 11V (400mΩ RDS(ON))
- DRV8411A: 1.65 to 11V (400mΩ RDS(ON))
PWM Control Interface
Low-Current 3µA Sleep Mode (2-wire input version only)
Thermally-Enhanced Surface Mount Package
Protection Features
- VM Undervoltage Lockout (UVLO)
- Overcurrent Protection (OCP)
- Thermal Shutdown (TSD)
- Fault Condition Indication Pin (nFAULT) (2-wire input version only)

Dual H-Bridge Motor Driver
- Single/Dual Brushed DC
- Stepper
- Solenoids
4 to 18V Operating Supply Voltage Range
Low ON-resistance: HS + LS = 900mΩ (Typical, 25°C)
High Output Current per H-Bridge
- 2A Maximum Driver Current at 12V and TA = 25°C
- Parallel Mode Available Capable of 4A Maximum Driver Current at 12V and TA = 25°C
Device versions:
- DRV8421A (4-wire input): Independent Half Bridge Control
- DRV8421B (2-wire input): Sleep Mode, Fault detect
Similar LV Stepper Drivers:
- DRV8410: 1.65 to 11V (800mΩ RDS(ON))
- DRV8411: 1.65 to 11V (400mΩ RDS(ON))
- DRV8411A: 1.65 to 11V (400mΩ RDS(ON))
PWM Control Interface
Low-Current 3µA Sleep Mode (2-wire input version only)
Thermally-Enhanced Surface Mount Package
Protection Features
- VM Undervoltage Lockout (UVLO)
- Overcurrent Protection (OCP)
- Thermal Shutdown (TSD)
- Fault Condition Indication Pin (nFAULT) (2-wire input version only)

The DRV8421 provides a dual H-bridge motor driver for home appliances and other mechatronic applications. The device can be used to drive one or two DC motors, a bipolar stepper motor, or other loads. A simple PWM interface allows easy interfacing to controller circuits.

The output block of each H-bridge driver consists of N-channel power MOSFETs configured as full H-bridges to drive the motor windings. The DRV8421 is capable of driving a maximum current of 2A from each output or 4A in parallel mode (with proper heat sinking, at 12V and TA = 25°C).

The device contains two versions having a 4-wire input (DRV8421A) or a 2-wire input (DRV8421B). The 2-wire input version (DRV8421B) contains features like enable and fault detection, while the 4-wire input version (DRV8421A) can drive four half bridges based on signals to four input terminals. A low-power sleep mode is also provided for the 2-wire input version. It shuts down internal circuitry to achieve very-low quiescent current draw. This sleep mode can be set by pulling the enable pin low.

Internal protection functions are provided for UVLO, OCP, short-circuit protection, and overtemperature. Fault conditions are indicated by a nFAULT pin in the DRV8421B, the 2-wire input device.

The DRV8421 provides a dual H-bridge motor driver for home appliances and other mechatronic applications. The device can be used to drive one or two DC motors, a bipolar stepper motor, or other loads. A simple PWM interface allows easy interfacing to controller circuits.

The output block of each H-bridge driver consists of N-channel power MOSFETs configured as full H-bridges to drive the motor windings. The DRV8421 is capable of driving a maximum current of 2A from each output or 4A in parallel mode (with proper heat sinking, at 12V and TA = 25°C).

The device contains two versions having a 4-wire input (DRV8421A) or a 2-wire input (DRV8421B). The 2-wire input version (DRV8421B) contains features like enable and fault detection, while the 4-wire input version (DRV8421A) can drive four half bridges based on signals to four input terminals. A low-power sleep mode is also provided for the 2-wire input version. It shuts down internal circuitry to achieve very-low quiescent current draw. This sleep mode can be set by pulling the enable pin low.

Internal protection functions are provided for UVLO, OCP, short-circuit protection, and overtemperature. Fault conditions are indicated by a nFAULT pin in the DRV8421B, the 2-wire input device.

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