DRV8847RTER

The DRV8847 device is a dual H-bridge motor driver suitable for industrial applications, household appliances, ePOS printers, and other electromechanical products. This device can be used to drive two DC motors, a bipolar stepper motor, or other loads such as relays. With a simple PWM interface, it can be easily connected to a controller. The DRV8847 device is powered by a single power supply and supports a wide input power supply range of 2.7V to 18V. The output stage of the driver consists of N-channel power MOSFETs configured as two full H-bridges for driving motor windings or four independent half-bridges (located at independent bridged interfaces). A fixed off-time controls the peak current in the bridge, which can drive a 1A load (in parallel mode at 25°C TA, it can drive a 2A load under proper heat dissipation conditions). A low-power sleep mode is provided to achieve lower quiescent current consumption by turning off a large number of internal circuits. In addition, an included torque scalar can dynamically adjust the output current through a digital input pin. This feature can reduce the current required by the controller to achieve lower power consumption. Various internal protection functions are also provided, such as undervoltage lockout, overcurrent protection for each FET, short-circuit protection, open-load detection, and overheat protection. Fault conditions are indicated by the nFAULT pin. The I2C device version (DRV8847S) provides detailed diagnostics.

Applications

• Refrigerator dampers and ice makers
• Washing machines, dryers, and dishwashers
• Electronic point-of-sale (ePOS) printers
• Stage lighting equipment
• Miniature circuit breakers and smart meters

Key features

• Dual H-bridge motor driver
• Single or dual brushed DC motors
• One bipolar stepper motor
• Solenoid loads
• 2.7V to 18V operating voltage range
• High output current per H-bridge
• 1A RMS driver current at TA = 25°C
• 2A RMS driver current at TA = 25°C in parallel mode
• Low RDS(ON) when VM > 5V
• RDS(ON) (HS + LS) of 1000mΩ at TA = 25°C
• Multiple control interface options
• 4-pin interface
• 2-pin interface
• Parallel bridge interface
• Independent bridge interface
• Current regulation with 20μs fixed off-time
• Output current scaling to 50% torque scalar
• 1.8V, 3.3V, 5V logic input compatible
• Low-power sleep mode
• 1.7μA sleep mode supply current at VVM = 12V, TA = 25°C
• I2C device variant available (DRV8847S)
• Detailed diagnostics via I2C registers
• Multi-slave operation support
• Standard and fast I2C mode support
• Small package and footprint
• 16-pin TSSOP (no thermal pad)
• 16-pin HTSSOP PowerPAD package
• 16-pin WQFN thermal package
• Integrated protection features
• VM undervoltage lockout
• Overcurrent protection
• Open-load detection
• Thermal shutdown
• Fault condition indicator pin (nFAULT)