ADM00308 Microchip Technology, ADM00308 Datasheet - Page 9

• Manufacturer Part Number: ADM00308
• Description: Power Management IC Development Tools MTS2916A Stepper Driver Eval Board
• Manufacturer: Microchip Technology
• Type: Motor / Motion Controllers & Driversr

Specifications of ADM00308

• Rohs: yes
• Product: Evaluation Boards
• Tool Is For Evaluation Of: MTS2916A
• Input Voltage: 7 VDC to 12 VDC

1.1
1.2
 2012 Microchip Technology Inc.
INTRODUCTION
MTS2916A SHORT OVERVIEW
This chapter provides an overview of the MTS2916A Dual Full-Bridge Stepper Motor
Driver Evaluation Board and covers the following topics:
• MTS2916A Short Overview
• What is the MTS2916A Dual Full-Bridge Stepper Motor Driver Evaluation Board?
• MTS2916A Dual Full-Bridge Stepper Motor Driver Evaluation Board Kit Contents
The MTS2916A stepper motor driver is a CMOS device capable of driving both
windings of a bipolar stepper motor or bidirectionally controlling two DC motors. Only
the stepper motor application is covered by this user’s guide. Each of the two
independent H-Bridge outputs are capable of sustaining 40V and delivering 750 mA of
continuous current. The user must ensure that the thermal guidelines are followed and
the driver does not exceed the maximum junction temperature of +150°C. The driver
will typically enter in thermal shutdown at a junction temperature of +170°C. The output
current level is controlled by an internal Pulse-Width Modulation (PWM) circuit that is
configured using two logic inputs, a current sense resistor and a selectable reference
voltage.
Full, half and microstepping operations are possible with the PWM current control and
logic inputs. The maximum output current is set by a sense resistor and a user
selectable voltage reference. The evaluation board voltage reference is controlled with
the run switch and is detailed in
Full-Bridge Stepper Motor Driver Evaluation
independent phase input that controls the current flow direction for its specific load.
Internal clamp diodes protect against inductive voltage transients. The thermal protec-
tion circuitry disables the outputs when the junction temperature exceeds the thermal
protection threshold. The thermal protection circuitry typically has 25°C of hysteresis.
Undervoltage lockout circuitry prevents the outputs from going active until the logic
supply voltage is high enough to assume control. No special power-up sequencing is
required.
Chapter 1. Product Overview
EVALUATION BOARD USER’S GUIDE
MTS2916A DUAL FULL-BRIDGE
Section 2.4.1 “Powering the MTS2916A Dual
STEPPER MOTOR DRIVER
Board”. Each bridge has an
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