Overview
The DRV8870DDAR, produced by Texas Instruments, is a brushed-DC motor driver designed for driving DC motors, one winding of a stepper motor, or other loads. This device is optimized for use in various applications such as printers, appliances, industrial equipment, and other small machines. It operates within a wide voltage range of 6.5 V to 45 V and can handle up to 3.6 A of peak current. The DRV8870 features an H-bridge driver consisting of four N-channel MOSFETs, allowing for bidirectional motor control. The device also supports PWM control for motor speed regulation and includes integrated current regulation to limit motor current to a predefined maximum level.
Key Specifications
| Parameter | Value |
|---|---|
| Operating Voltage | 6.5 V to 45 V |
| Peak Current Drive | 3.6 A |
| RDS(on) (HS + LS) | 565 mΩ (typical) |
| Package Type | HSOP (8-pin) |
| Package Size | 4.9 mm × 6.0 mm |
| Control Interface | PWM |
| Current Regulation | Integrated, based on VREF and ISEN pin |
| Protection Features | VM Undervoltage Lockout (UVLO), Overcurrent Protection (OCP), Thermal Shutdown (TSD) |
| Sleep Mode | Low-power sleep mode when both inputs are low |
Key Features
- Wide operating voltage range of 6.5 V to 45 V
- 3.6 A peak current drive capability
- Integrated current regulation based on VREF and ISEN pin
- PWM control interface for motor speed regulation
- Low-power sleep mode when both inputs are low
- Integrated protection features including VM undervoltage lockout, overcurrent protection, and thermal shutdown
- Automatic fault recovery
- Small package size (HSOP, 8-pin) with PowerPAD™ for thermal management
Applications
- Printers
- Appliances
- Industrial equipment
- Other mechatronic applications
Q & A
- What is the operating voltage range of the DRV8870?
The DRV8870 operates within a voltage range of 6.5 V to 45 V. - What is the peak current drive capability of the DRV8870?
The DRV8870 can drive up to 3.6 A of peak current. - Does the DRV8870 support PWM control?
Yes, the DRV8870 supports PWM control for motor speed regulation. - What are the integrated protection features of the DRV8870?
The DRV8870 includes VM undervoltage lockout, overcurrent protection, and thermal shutdown. - How does the DRV8870 enter sleep mode?
The device enters sleep mode when both inputs are set low. - What is the purpose of the ISEN pin on the DRV8870?
The ISEN pin is used for current sensing and is part of the integrated current regulation system. - What type of package does the DRV8870 come in?
The DRV8870 comes in an 8-pin HSOP package with PowerPAD™. - Does the DRV8870 have automatic fault recovery?
Yes, the DRV8870 features automatic fault recovery after the removal of fault conditions. - What are some common applications of the DRV8870?
The DRV8870 is commonly used in printers, appliances, industrial equipment, and other mechatronic applications. - How does the DRV8870 regulate motor current?
The DRV8870 regulates motor current based on the analog input VREF and the voltage on the ISEN pin, using an external sense resistor.
