TI DRV8424PPWPR

The DRV8424E/P and DRV8425E/P devices are dual H-bridge motor drivers suitable for various industrial applications. These devices can be used to drive two DC motors or one bipolar stepper motor. The output stage of the driver includes N-channel power MOSFETs configured as two full H-bridges, a charge pump regulator, current sensing and regulation, and protection circuits. The integrated current sensing function uses an internal current mirror architecture, eliminating the need for high-power shunt resistors, which can save board space and reduce system cost. A low-power sleep mode is provided to achieve ultra-low quiescent current consumption by shutting down most of the internal circuits. The internal protection features provided include: power supply undervoltage lockout (UVLO), charge pump undervoltage (CPUV), output overcurrent (OCP), and device overtemperature shutdown (OTSD) protection. The DRV8424E/P can drive a stepper motor with a full-scale current of up to 2.5A or a brushed motor with a peak current of up to 4A; the DRV8425E/P can drive a stepper motor with a full-scale current of up to 2A or a brushed motor with a peak current of up to 3.2A (depending on the design). The DRV8424E/P and DRV8425E/P are integrated motor driver solutions for bipolar stepper motors or dual brushed DC motors. These devices integrate two N-channel power MOSFET H-bridges and integrated current sensing and regulation circuits. The DRV8424E/P and DRV8425E/P are pin-to-pin compatible with the DRV8426E/P, DRV8436E/P, and DRV8434E/P. The DRV8424E/P and DRV8425E/P can be powered by a supply voltage of 4.5V to 33V. The DRV8424E/P can provide an output current of up to 4A peak or 2.5A full-scale. The DRV8425E/P can provide an output current of up to 3.2A peak or 2A full-scale. The actual full-scale and RMS currents depend on the ambient temperature, supply voltage, and PCB thermal performance. The DRV8424E/P and DRV8425E/P devices use an integrated current sensing architecture, eliminating the need for two external power sensing resistors, which significantly saves board space and BOM cost, and reduces design effort and power consumption. This architecture uses a current mirror method and internal power MOSFETs for current sensing, eliminating power losses in the sensing resistors. The current regulation setpoint is adjusted by the voltage at the VREFA and VREFB pins. With a simple PH/EN (DRV8424E and DRV8425E) or PWM (DRV8424P and DRV8425P) interface, it can be easily connected to the controller circuit. Current regulation is highly configurable and can operate in multiple decay modes. The selectable decay modes include smart-tuned dynamic decay, smart-tuned ripple control, mixed, or fast decay. The PWM off-time tOFF can be adjusted to 7, 16, 24, or 32μs. The system includes a low-power sleep mode to save power when the motor is not being driven.

• Dual H-bridge motor driver: one bipolar stepper motor; two bidirectional brushed DC motors; four unidirectional brushed DC motors
• Integrated current sense: no sense resistors required; ±5% full-scale current accuracy
• 4.5V to 33V operating supply voltage range
• Multiple control interface options: Phase/Enable (PH/EN); PWM (IN/IN)
• Smart tune, fast, and mixed decay options
• Low RDS(ON): DRV8424E/P: 330mΩ HS + LS at 24V, 25°C; DRV8425E/P: 550mΩ HS + LS at 24V, 25°C
• High current capacity per bridge: DRV8424E/P: 4A peak (brushed), 2.5A full-scale (stepper); DRV8425E/P: 3.2A peak (brushed), 2A full-scale (stepper)
• Pin-to-pin compatible with: DRV8426E/P: 33V, 900mΩ HS + LS; DRV8436E/P: 48V, 900mΩ HS + LS; DRV8434E/P: 48V, 330mΩ HS + LS
• Configurable off-time PWM chopping: 7, 16, 24, or 32μs
• 1.8V, 3.3V, 5.0V logic input support
• Low-current sleep mode (2μA)
• Spread-spectrum clocking for low EMI
• Inrush current limiting in brushed DC applications
• Small package and form factor
• Protection features: VM undervoltage lockout (UVLO); charge pump undervoltage (CPUV); overcurrent protection (OCP); thermal shutdown (OTSD)

• Printers and scanners
• ATM and factory automation
• Office and home automation
• Factory automation and robotics
• Major home appliances
• Robotic vacuums, humanoid robots, and toy robots