PT12477
PT12477 is Micro Stepping Motor Driver manufactured by PTC.
DESCRIPTION
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 municates 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 28pins QFN package, both packages with thermal pad.
APPLICATIONS
- Automatic teller machines
- Video security cameras
- Printers
- Scanners
- Office automation machines
- Amusement machines
- Factory automation
- Robotics
BLOCK DIAGRAM
3V3REF
VREFA VREFB
MS0 MS1 MS2 STEP DIR DECAY
EN RSTN SLEPN
HON FALTN
FEATURES
- Automotive AEC-Q100 Grade 1 (-40℃~+125℃) Qualified.
- 7.4-V to 45-V 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...
