Automotive Stepping Motor Driver IC


PT12477

The PT12477 is a monolith integrated motor driver designed for printers, scanners, and home or office automated equipment. The dual H-bridge drivers are consisting by all of N-channel MOSFETs, and designed to drive a 4-wires bipolar stepper motor. The output driving current of the PT12477 allows up to 1.6 Amps (mounted on dual layer PCB with proper heatsinking, VM=24V, TA=25°C).

To simplified control interface, the STEP and DIR pins allows easy communicates with micro controller, Three Mode Select pins allow for configuration the micro steps from full-step divides to 1/32 micro-step. 3 kind of winding current decay modes are configurable to keeps motor not missing step and low current ripple. A low-power sleep mode is provided which shuts down internal circuitry to achieve very-low quiescent current draw. This sleep mode can be sets by SLEPN pin.

The PT12477 is available in 28-pins HTSSOP or 28-pins QFN package, both packages with thermal pad.

FEATURES


● Automotive AEC-Q100 Grade 1 (-40℃~+125℃) Qualified.

● 8V to 36V supply voltage range

● 1.6-A maximum driving current at VM=24V (with additional heatsink)

● Dual H-bridge driver for bipolar stepper motor with such features:

- PWM chopping constant current regulation

- Built-In micro stepping sequencer

- Multiple micro steps, Full, 1/2, 1/4, 1/8, 1/16 and up to 1/32 steps

● STEP and DIR logic inputs can control stepping motor revs and direction.

● Winding current decay modes

- Mixed Decay

- Slow Decay

- Fast Decay

● Built In a 3.3V reference voltage output

● Low-power sleep mode

● Protection features

- Over current protection (OCP)

- Thermal shutdown (TSD)

- VM under voltage lock out (UVLO)

- Fault indication pin (FALTN)

● Package Type - HTSSOP 28

                               - QFN 28



APPLICATIONS


● Automatic teller machines

● Video security cameras

● Printers

● Scanners

● Office automation machines

● Amusement machines

● Factory automation

● Robotics

資源下載

Documentation

Tools

Application Note

TitleFileVersionDate
Demo Board說明書PT12477 Demo Board.pdfV1.02023/3/8