Overview
The DRV8432DKD from Texas Instruments is a high-performance, integrated dual full-bridge motor driver designed for driving brushed DC and stepper motors, as well as three-phase permanent magnet synchronous motors. This device features an advanced protection system and high-efficiency power stage, making it suitable for energy-efficient applications. The DRV8432DKD operates with a high switching frequency of up to 500 kHz and includes independent supply and ground pins for each half-bridge, allowing for current measurement through external shunt resistors and support for multiple motors with different power supply voltage requirements.
Key Specifications
| Parameter | Value |
|---|---|
| Operating Supply Voltage | Up to 52 V (70 V Absolute Maximum) |
| Continuous Output Current (Dual Full-Bridge Mode) | Up to 2 x 7 A (2 x 12 A Peak) |
| Continuous Output Current (Parallel Mode) | Up to 14 A (24 A Peak) |
| PWM Operating Frequency | Up to 500 kHz |
| RDS(on) MOSFETs | 110 mΩ at TJ = 25°C |
| Operating Temperature Range | -40°C to 85°C |
| Package Group | 36-pin PSOP3 DKD package |
| Thermal Resistance (Junction-to-Ambient) | 13.3 °C/W (with heat sink) |
Key Features
- High-efficiency power stage with up to 97% efficiency
- Low RDS(on) MOSFETs for reduced power loss
- Independent supply and ground pins for each half-bridge
- Programmable cycle-by-cycle current limit protection
- Integrated self-protection circuits including undervoltage, overtemperature, overload, and short-circuit protection
- Intelligent gate drive and cross conduction prevention
- No external snubber or Schottky diode required
Applications
- Brushed DC and stepper motors
- Three-phase permanent magnet synchronous motors
- Robotic and haptic control systems
- Actuators and pumps
- Precision instruments
- TEC drivers
Q & A
- What is the maximum operating supply voltage for the DRV8432DKD?
The maximum operating supply voltage is up to 52 V, with an absolute maximum of 70 V. - What is the continuous output current in dual full-bridge mode?
The continuous output current in dual full-bridge mode is up to 2 x 7 A, with a peak of 2 x 12 A. - What is the PWM operating frequency of the DRV8432DKD?
The PWM operating frequency can be up to 500 kHz. - What is the RDS(on) of the MOSFETs in the DRV8432DKD?
The RDS(on) of the MOSFETs is 110 mΩ at TJ = 25°C. - What are the key protection features of the DRV8432DKD?
The device includes undervoltage, overtemperature, overload, and short-circuit protection, as well as programmable cycle-by-cycle current limit protection. - Does the DRV8432DKD require external snubber or Schottky diodes?
No, the DRV8432DKD does not require external snubber or Schottky diodes. - What is the operating temperature range of the DRV8432DKD?
The operating temperature range is -40°C to 85°C. - What package type is the DRV8432DKD available in?
The DRV8432DKD is available in a 36-pin PSOP3 DKD package. - What are some typical applications of the DRV8432DKD?
Typical applications include brushed DC and stepper motors, three-phase permanent magnet synchronous motors, robotic and haptic control systems, actuators and pumps, precision instruments, and TEC drivers. - How does the DRV8432DKD handle thermal management?
The device includes a thick heat slug on the top side for dissipating heat through a heatsink, and it has a junction-to-ambient thermal resistance of 13.3 °C/W with a heat sink.
