Products Overview

AMT49700 Automotive Stepper Motor Driver IC
with programmable motion control

Allegro MicroSystems

AMT49700 automotive microstepping motor driver IC with programmable motion control

Allegro's AMT49700 is a flexible microstepping stepper motor driver with integrated phase current control, built-in translator, and simple motion control. As a single chip solution, it is designed to operate bipolar stepper motors in full, half, quarter, eighth, and sixteenth step modes at up to 28 V.
Reducing the microprocessor overhead, the AMT49700 is a unique motion profile controller that provides programmable motor acceleration and deceleration which is particularly useful for systems with multiple stepper motors. Additionally, it provides integrated current sensing, which also reduces the number of external components.
Ideal for high-temperature applications such as headlamp leveling/bending and engine management motion control, the AMT49700 is versatile in that it is also suitable for other automotive stepper applications such as HVAC flap and valves.
The current regulator operates with fixed frequency PWM and uses adaptive mixed current decay to reduce audible motor noise and increase step accuracy. The current in each phase of the motor is controlled through a DMOS full-bridge using synchronous rectification to improve power dissipation. Internal circuits and timers prevent cross-conduction and shoot through when switching between high-side and low-side drives.
The outputs are protected from short circuits, and features for low load current detection are included. Chip-level protection includes hot thermal warning, overtemperature shutdown, overvoltage lockout, and undervoltage lockout.
The AMT49700 is supplied in a 32-terminal 5 mm x 5 mm QFN package with an exposed thermal pad (package type ET).

Product Number: AMT49700KETJTR

Class: Motor Drive、Controller、PowerManagentIC(PMIC)

Tag: Automotive Stepper Driver IC, Automotive Stepper Drive

Peak motor current up to 1.6 A at 28 V
Low RDS(ON) outputs, 0.5 Ω source and sink typical
Continuous operation at high ambient temperature
3.7 V to 42 V supply operation
Adaptive mixed current decay
Synchronous rectification for low power dissipation
Output slew control and PWM frequency spreading for EMC noise reduction
Internal overvoltage and undervoltage lockout
Hot warning and overtemperature shutdown
Short-circuit, open-load diagnostics
Programmable motion control
Configurable through serial interface
Simple step and direction control option

Applications
Automotive stepper motors Engine management Headlamp positioning HHVAC flap and valve control

Part Number Output Configuration Interface Technology Step Resolution Current - Output Voltage - Supply Operating Temperature Mounting Type Package / Case Supplier Device Package
AMT49700KETJTR Half Bridge (4) Serial Power MOSFET 1、1/2、1/4、1/8、1/16 1.6A 0V ~ 42V -40°C ~ 125°C Surface Mount, Wettable Flank 32-VFQFN Exposed Pad 32-lead QFN (5x5)

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    Datasheet Download on Jun, 2022

Main Products

Allegro Micro Systems

Main Products

Alpha & Omega Semiconductor (AOS)

Devoted to Excellent Professional Technical Support Throughout the Supply Chain

Everstar currently serves global semiconductor brands, including Allegro, AOS, Vincotech, and SHARP photocoupler, to offer products with complementary features. The products we carried integrate magnetic sensor chips, motor driver chips, power components, power modules, etc., to offer an extensive hardware infrastructure system design solution. The product applications focus on cloud server power suppliers, server cooling fan motor drivers, automotive power supply systems, LED lights, industrial motors, etc., targeted to broadly cover our customers' needs.