Overview
The DRV8842-EP, produced by Texas Instruments, is an integrated motor driver IC designed to drive one DC motor, one coil of a stepper motor, or other actuator loads. This device is particularly suited for applications in printers, scanners, office automation machines, gaming machines, factory automation, and robotics. The DRV8842-EP features a single H-bridge motor driver with current-control PWM circuitry, allowing for precise control over the motor current. It operates within an 8.2 to 45 V supply voltage range and can deliver up to 5-A peak or 3.5-A RMS output current with proper heatsinking. The device includes built-in protection mechanisms such as overcurrent protection, thermal shutdown, and undervoltage lockout, ensuring reliable operation under various conditions.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Supply Voltage Range | VM | 8.2 V to 45 V |
| Maximum Drive Current | Peak/RMS at 24 V, 25°C | 5 A / 3.5 A |
| MOSFET On-Resistance | RDS(ON) | Low |
| Current Control | PWM Frequency | 50 kHz |
| Current Sense Amplifier Gain | AISENSE | 5 V/V |
| Package Type | HTSSOP (PWP) with 28 pins | |
| Operating Temperature Range | –55°C to 125°C | |
| Thermal Resistance (Junction-to-Ambient) | RθJA | 35.6 °C/W |
Key Features
- Single H-bridge motor driver with current-control PWM circuitry
- Five-bit winding current control allowing up to 32 current levels
- Built-in 3.3-V reference output
- Industry-standard PWM control interface
- Low MOSFET on-resistance
- Internal shutdown functions for overcurrent protection, short circuit protection, undervoltage lockout, and over-temperature protection
- Support for slow, fast, and mixed decay modes
- Thermally enhanced surface mount package with PowerPAD™
- Eco-friendly: RoHS compliant and free of Sb/Br
Applications
- Printers
- Scanners
- Office automation machines
- Gaming machines
- Factory automation
- Robotics
- Defense, aerospace, and medical applications
Q & A
- What is the supply voltage range of the DRV8842-EP?
The DRV8842-EP operates within an 8.2 to 45 V supply voltage range.
- What is the maximum drive current of the DRV8842-EP?
The DRV8842-EP can deliver up to 5-A peak or 3.5-A RMS output current at 24 V and 25°C with proper heatsinking.
- What types of decay modes does the DRV8842-EP support?
The DRV8842-EP supports slow, fast, and mixed decay modes.
- What protection mechanisms are built into the DRV8842-EP?
The DRV8842-EP includes overcurrent protection, thermal shutdown, and undervoltage lockout.
- What is the package type of the DRV8842-EP?
The DRV8842-EP is available in a 28-pin HTSSOP (PWP) package with PowerPAD™.
- What is the operating temperature range of the DRV8842-EP?
The DRV8842-EP operates within a temperature range of –55°C to 125°C.
- How does the DRV8842-EP control motor current?
The DRV8842-EP uses a fixed-frequency PWM current regulation to control the motor current.
- What is the purpose of the DECAY pin on the DRV8842-EP?
The DECAY pin selects the decay mode: slow decay (logic low), mixed decay (open), or fast decay (logic high).
- How does the DRV8842-EP handle fault conditions?
The DRV8842-EP reports faults through the nFAULT pin and disables the H-bridge driver in case of overcurrent, thermal shutdown, or undervoltage lockout.
- What are some common applications of the DRV8842-EP?
The DRV8842-EP is commonly used in printers, scanners, office automation machines, gaming machines, factory automation, and robotics.
