The DRV8825 provides an integrated motor driver solution for printers, scanners, and other automated equipment applications. The device has two H-bridge drivers and a microstepping indexer, and is intended to drive a bipolar stepper motor. The output driver block consists of N-channel power MOSFETs configured as full H-bridges to drive the motor windings. The DRV8825 is capable of driving up to 2.5 A of current from each output (with proper heat sinking, at 24 V and 25°C).
A simple STEP/DIR interface allows easy interfacing to controller circuits. Mode pins allow for configuration of the motor in full-step up to 1/32-step modes. Decay mode is configurable so that slow decay, fast decay, or mixed decay can be used. 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 shutdown functions are provided for overcurrent, short circuit, under voltage lockout and over temperature. Fault conditions are indicated via the nFAULT pin.
|Vs (Max) (V)|
|# of Full Bridges|
|RDS(ON) (HS + LS) (mOhms)|
|RMS Output Current (A)|
|Peak Output Current (A)|
|Current Regulation Levels|
|Operating Temperature Range (C)|
|Approx. Price (US$)|
|Part #||Name||Product Family||Comments|
|MSP430F2619||16-Bit Ultra-Low-Power MCU, 92KB Flash, 4KB RAM, 12-Bit ADC, Dual DAC, 2 USCI, HW Mult, DMA||Ultra-low Power - MSP430F2x/4x||16-Bit Ultra-Low-Power MCU, 92KB Flash, 4KB RAM, 12-Bit ADC, Dual DAC, 2 USCI, HW Mult, DMA|
|MSP430F2112||16-bit Ultra-Low-Power Microcontroller, 2kB Flash, 256B RAM, 10 bit ADC, 1 USCI||Ultra-low Power - MSP430F2x/4x||16-Bit Ultra-Low-Power MCU, 92KB Flash, 4KB RAM, 12-Bit ADC, Dual DAC, 2 USCI, HW Mult, DMA|