company blog about TI DRV8871DDARQ1 Automotive 50V 3.6A H-bridge Motor Driver With Integrated Current Sensing

TI DRV8871DDARQ1 Automotive 50V 3.6A H-bridge Motor Driver With Integrated Current Sensing

With the rapid development of automotive electronics and industrial automation, high efficiency, reliable motor driver demand is growing. Shenzhen Mingjiada Electronics Co., Ltd. supplies TI DRV8871DDARQ1 automotive 50V 3.6A H-bridge motor driver, designed for automotive and industrial applications. Its high integration and excellent performance makes it a benchmark product in the field of motor drive.

1，Description Of DRV8871DDARQ1

DRV8871DDARQ1 device is a brushed-DC motor driver for printers, appliances, industrial equipment, and other small machines. Two logic inputs control the H-bridge driver, which consists of four N-channel MOSFETs that can control motors bidirectionally with up to 3.6-A peak current. The inputs can be pulse-width modulated (PWM) to control motor speed, using a choice of current-decay modes. Setting both inputs low enters a low-power sleep mode.

DRV8871DDARQ1 device has advanced current-regulation circuitry that does not use an analog voltage reference or external sense resistor. This novel solution uses a standard low-cost, low-power resistor to set the current threshold. The DRV8871DDARQ1 ability to limit current to a known level can significantly reduce the system power requirements and bulk capacitance needed to maintain stable voltage, especially for motor startup and stall conditions.

DRV8871DDARQ1 device is fully protected from faults and short circuits, including undervoltage (UVLO), overcurrent (OCP), and overtemperature (TSD). When the fault condition is removed, the device automatically resumes normal operation.

2，Specifications Of DRV8871DDARQ1

Product: Brushed DC Motor Drivers

Type: Half Bridge

Output Current: 3.6 A

Operating Supply Current: 3 mA

Minimum Operating Temperature: - 40 C

Maximum Operating Temperature: + 125 C

Features: Current Regulation, Integrated Current Sensing

Load Voltage Rating: 45 V

Moisture Sensitive: Yes

Number of Outputs: 1 Output

Operating Frequency: 200 kHz

Supply Voltage - Max: 45 V

Supply Voltage - Min: 6.8 V

Unit Weight: 97.700 mg

3，Key Features Of DRV8871DDARQ1

Integrated Current Sense

The DRV8871DDARQ1's integrated current sense function eliminates the need for external sense resistors, significantly reducing system complexity and power consumption. This design not only reduces board area, but also optimises power performance, making it particularly suitable for space-constrained applications.

Wide Voltage Range and High Output Current

The DRV8871DDARQ1 device supports a wide supply voltage range of 6.5V to 45V and an output current of up to 3.6A, which meets the needs of both 12V and 24V industry-standard power supplies, making it suitable for a wide range of motor drive scenarios.

High Reliability and Protection

The DRV8871DDARQ1 is equipped with a variety of protection features, including overcurrent protection (OCP), undervoltage lockout (UVLO), and thermal shutdown (TSD), to ensure the system operates safely under abnormal conditions. Its fault detection function provides real-time feedback of system status through the nFAULT pin, further enhancing system reliability.

Package and Operating Temperature

The DRV8871DDARQ1 device is available in a HSOP-8 package with good thermal performance and an operating temperature range of -40°C to 150°C, making it suitable for harsh automotive and industrial environments.

4，Applications Of DRV8871DDARQ1

Automotive Electronics

DRV8871DDARQ1 is widely used in automotive electronics, such as power seat adjustment, window lift, sunroof control and other systems. Its high reliability and wide temperature range make it ideal for automotive grade applications.

Industrial Automation

DRV8871DDARQ1 In industrial automation, the device can be used to drive brushed DC motors for equipment such as robots, conveyors, pumps and fans. Its integrated current detection simplifies design and reduces system cost.

Household Appliances

The DRV8871DDARQ1 can also be used in household appliances such as washing machines, hoovers and power tools. Its high efficiency and small package size make it the preferred solution for home appliance motor drives.

5，Simplified Schematic Of DRV8871DDARQ1

6，Functional Block Diagram Of DRV8871DDARQ1