DRV8846 Series

18-V, 1.4-A bipolar stepper motor driver with 1/32 microstepping and smart tune adaptive decay

Catalog

18-V, 1.4-A bipolar stepper motor driver with 1/32 microstepping and smart tune adaptive decay

Part	Voltage - Load [Max]	Voltage - Load [Min]	Function	Mounting Type	Output Configuration	Voltage - Supply [Min]	Voltage - Supply [Max]	Operating Temperature [Max]	Operating Temperature [Min]	Supplier Device Package	Package / Case	Applications	Technology	Motor Type - Stepper	Interface	Current - Output
Texas Instruments DRV8846RGET	18 V	4 V	Driver - Fully Integrated Control and Power Stage	Surface Mount	Half Bridge (4)	4 V	18 V	150 °C	-40 °C	24-VQFN (4x4)	24-VFQFN Exposed Pad	Stepper Motors	Power MOSFET	Bipolar	Step/Direction	1.4 A

Catalog

18-V, 1.4-A bipolar stepper motor driver with 1/32 microstepping and smart tune adaptive decay

Key Features

• PWM Microstepping Motor DriverBuilt-In Microstepping IndexerUp to 1/32 MicrosteppingStep/Direction ControlMultiple Decay ModesSmart tune TechnologyMixed DecaySlow DecayFast DecayConfigurable Off-Time PWM Chopping10-, 20-, or 30-µs Off-TimeAdaptive Blanking Time for Smooth Stepping4- to 18-V Operating Supply Voltage Range1.4-A (Full Scale (Max Drive) Current per H-Bridge (at 25°C)Low-Current Sleep Mode3-Bit Torque DAC to Scale Motor CurrentThermally Enhanced Surface Mount PackageProtection FeaturesVM Undervoltage Lockout (UVLO)Overcurrent Protection (OCP)Thermal Shutdown (TSD)Fault Condition Indication Pin (nFAULT)PWM Microstepping Motor DriverBuilt-In Microstepping IndexerUp to 1/32 MicrosteppingStep/Direction ControlMultiple Decay ModesSmart tune TechnologyMixed DecaySlow DecayFast DecayConfigurable Off-Time PWM Chopping10-, 20-, or 30-µs Off-TimeAdaptive Blanking Time for Smooth Stepping4- to 18-V Operating Supply Voltage Range1.4-A (Full Scale (Max Drive) Current per H-Bridge (at 25°C)Low-Current Sleep Mode3-Bit Torque DAC to Scale Motor CurrentThermally Enhanced Surface Mount PackageProtection FeaturesVM Undervoltage Lockout (UVLO)Overcurrent Protection (OCP)Thermal Shutdown (TSD)Fault Condition Indication Pin (nFAULT)

Description

The DRV8846 provides a highly-integrated stepper motor driver for cameras, printers, projectors, and other automated equipment applications. The device has two H-bridges and a microstepping indexer and is intended to drive a bipolar stepper motor. The output block of each H-bridge driver consists of N-channel and P-channel power MOSFETs configured as full H-bridges to drive the motor windings. The DRV8846 is capable of driving up to 1.4-A full-scale output current (with proper heatsinking and TA= 25°C). A simple STEP/DIR interface allows easy interfacing to controller circuits. Pins allow configuration of the motor in full-step up to 1/32-step modes. Decay mode is configurable so that smart tune, slow decay, fast decay, and mixed decay can be used. The PWM current chopping off-time can also be selected. A low-power sleep mode is provided which shuts down internal circuitry to achieve very-low quiescent current draw. This sleep mode can be set using a dedicated nSLEEP pin. Internal protection functions are provided for UVLO, overcurrent protection, short circuit protection, and overtemperature. Fault conditions are indicated via a nFAULT pin. The DRV8846 provides a highly-integrated stepper motor driver for cameras, printers, projectors, and other automated equipment applications. The device has two H-bridges and a microstepping indexer and is intended to drive a bipolar stepper motor. The output block of each H-bridge driver consists of N-channel and P-channel power MOSFETs configured as full H-bridges to drive the motor windings. The DRV8846 is capable of driving up to 1.4-A full-scale output current (with proper heatsinking and TA= 25°C). A simple STEP/DIR interface allows easy interfacing to controller circuits. Pins allow configuration of the motor in full-step up to 1/32-step modes. Decay mode is configurable so that smart tune, slow decay, fast decay, and mixed decay can be used. The PWM current chopping off-time can also be selected. A low-power sleep mode is provided which shuts down internal circuitry to achieve very-low quiescent current draw. This sleep mode can be set using a dedicated nSLEEP pin. Internal protection functions are provided for UVLO, overcurrent protection, short circuit protection, and overtemperature. Fault conditions are indicated via a nFAULT pin.