代理商供應 PT2477 普誠微步進電機驅動器
DESCRIPTION
The PT2477 is a monolith integrated motor driver designed for printers, scanners, and home or officeautomated equipment. The dual H-bridge drivers areconsisting by all of N-channel MOSFETs, and designedto drive a 4-wires bipolar stepper motor. The outputdriving current of the PT2477 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 pinsallows easy communicates with micro controller, ThreeMode Select pins allow for configuration the microsteps from full-step divides to 1/32 micro-step. 3 kindof winding current decay modes are configurable tokeeps motor not missing step and low current ripple. Alow-power sleep mode is provided which shuts downinternal circuitry to achieve very-low quiescent currentdraw. This sleep mode can be sets by SLEPN pin.
The PT2477 is available in 28-pins HTSSOP or 28-pinsQFN package, both packages with thermal pad.
FEATURES
● 8V to 45V supply voltage range
● 1.6-A maximum driving current at Vw=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)
APPLICATIONS
● Automatic teller machines
● Video security cameras
● Printers
● Scanners
● Office automation machines
● Amusement machines
● Factory automation
● Robotics
